/* ============================================================
   HH Tech API Gateway · Trang hướng dẫn khách hàng
   Theme: dark developer-console — neon gradient, dot-grid, glass
   ============================================================ */

:root {
  /* Base dark surfaces (pha giữa navy dịu và đen gốc) */
  --bg: #0d1321;
  --bg-2: #11192c;
  --panel: #151e32;
  --panel-2: #1a263d;
  --panel-3: #20304c80;
  --line: #293654;
  --line-strong: #37486f;
  --line-glow: #5b8dff55;

  /* Text */
  --text: #e6edf9;
  --text-2: #b6c2da;
  --muted: #7d8bab;
  --dim: #55627e;

  /* Accents — neon */
  --cyan: #38e8ff;
  --blue: #5b8dff;
  --indigo: #7c6cff;
  --violet: #b06cff;
  --green: #2ee6a6;
  --amber: #ffb454;
  --danger: #ff6b6b;

  --grad: linear-gradient(120deg, #38e8ff 0%, #5b8dff 45%, #b06cff 100%);
  --grad-green: linear-gradient(120deg, #38e8ff, #5bc8ff);
  --grad-gold: linear-gradient(120deg, #ffe08a 0%, #ffc24d 50%, #f0a020 100%);
  --grad-magenta: linear-gradient(120deg, #f078ff 0%, #c86bff 50%, #a24bff 100%);
  --grad-text: linear-gradient(120deg, #7ff3ff, #9db4ff 55%, #d0a8ff);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .4);
  --shadow: 0 20px 50px rgba(0, 0, 0, .5);
  --shadow-lg: 0 30px 80px rgba(0, 0, 0, .6);
  --glow: 0 0 0 1px var(--line-glow), 0 8px 40px rgba(59, 91, 219, .18);

  --r-sm: 10px;
  --r: 14px;
  --r-lg: 20px;

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Be Vietnam Pro", ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Noto Sans", sans-serif;
  --display: "Barlow Condensed", "Be Vietnam Pro", sans-serif;
  --hero: "Anton", "Barlow Condensed", sans-serif;

  --topbar-h: 72px;
}

* { box-sizing: border-box; }

/* Fix cốt lõi: tôn trọng thuộc tính hidden (author CSS đè [hidden] của UA) */
[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
  background-image:
    radial-gradient(900px 500px at 82% -8%, rgba(124, 108, 255, .16), transparent 60%),
    radial-gradient(760px 460px at 4% 2%, rgba(56, 232, 255, .12), transparent 55%),
    radial-gradient(circle at center, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: auto, auto, 26px 26px;
  overflow-x: hidden;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--cyan); text-decoration: none; }

/* ---------- Nền động: canvas particle + đốm sáng trôi (mang từ shop cũ) ---------- */
.bg-particles { position: fixed; inset: 0; z-index: -1; pointer-events: none; width: 100%; height: 100%; }
.bg-orbs { position: fixed; inset: 0; z-index: -2; pointer-events: none; overflow: hidden; }
.bg-orbs span {
  position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5;
}
.bg-orbs .orb1 { width: 460px; height: 460px; top: -120px; left: -80px; background: radial-gradient(circle, rgba(56,232,255,.5), transparent 70%); animation: float1 26s ease-in-out infinite; }
.bg-orbs .orb2 { width: 520px; height: 520px; top: 30%; right: -140px; background: radial-gradient(circle, rgba(176,108,255,.42), transparent 70%); animation: float2 32s ease-in-out infinite; }
.bg-orbs .orb3 { width: 400px; height: 400px; bottom: -120px; left: 30%; background: radial-gradient(circle, rgba(91,141,255,.4), transparent 70%); animation: float3 29s ease-in-out infinite; }
@keyframes float1 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(80px,60px)} }
@keyframes float2 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(-70px,50px)} }
@keyframes float3 { 0%,100%{transform:translate(0,0)} 50%{transform:translate(60px,-60px)} }

code {
  font-family: var(--mono);
  font-size: .86em;
  background: rgba(91, 141, 255, .1);
  border: 1px solid var(--line-strong);
  padding: .1em .44em;
  border-radius: 6px;
  color: #a9c4ff;
  word-break: break-word;
}

/* ---------- Progress bar ---------- */
.read-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(91, 141, 255, .8);
  z-index: 200; transition: width .1s linear;
}

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 20px;
  padding: 0 clamp(14px, 3vw, 34px);
  background: rgba(19, 27, 46, .8);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--hero); font-weight: 400; font-size: 21px; color: var(--text); letter-spacing: .01em; text-transform: uppercase; }
.brand:hover { color: var(--text); }
.brand-logo {
  width: 34px; height: 34px; flex: 0 0 34px; object-fit: cover; border-radius: 10px;
  box-shadow: 0 0 22px rgba(91, 141, 255, .46), 0 0 0 1px rgba(255,255,255,.12) inset;
}
.brand-text { display: inline-flex; align-items: baseline; white-space: nowrap; }
.brand-mark {
  display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--grad); color: #05070f; font-size: 15px;
  box-shadow: 0 0 20px rgba(91, 141, 255, .5);
}
.brand-dim { color: var(--muted); font-weight: 600; font-size: 13px; margin-left: 2px; padding-left: 9px; border-left: 1px solid var(--line-strong); }
.topnav { display: flex; gap: 8px; flex: 1 1 auto; justify-content: center; }
/* 3 nút nav: khung + màu đặc trưng giống style Liên Hệ cũ.
   Trang Chính = cyan, List Model = xanh dương, Hướng dẫn cài đặt = vàng. */
.topnav a {
  color: var(--text-2); font-weight: 700; font-size: 14px;
  padding: 9px 16px; border-radius: 11px; transition: .15s; white-space: nowrap;
  border: 1.5px solid var(--nav-accent, rgba(148,180,220,.35));
  background: linear-gradient(180deg, var(--nav-bg-1, rgba(148,180,220,.10)), var(--nav-bg-2, rgba(148,180,220,.04)));
  box-shadow: 0 0 16px var(--nav-glow, transparent);
}
.topnav a:hover {
  color: #fff; transform: translateY(-1px);
  border-color: var(--nav-accent-strong, rgba(148,180,220,.7));
  background: linear-gradient(180deg, var(--nav-bg-1, rgba(148,180,220,.22)), var(--nav-bg-2, rgba(148,180,220,.12)));
  box-shadow: 0 0 24px var(--nav-glow-strong, rgba(148,180,220,.3));
}
.topnav a[href="#top"] { --nav-accent: rgba(56,232,255,.55); --nav-accent-strong: rgba(120,240,255,.95); --nav-bg-1: rgba(56,232,255,.14); --nav-bg-2: rgba(56,232,255,.05); --nav-glow: rgba(56,232,255,.18); --nav-glow-strong: rgba(56,232,255,.4); color: #bdf6ff; }
.topnav a[href="#list-model"] { --nav-accent: rgba(91,141,255,.6); --nav-accent-strong: rgba(120,170,255,.95); --nav-bg-1: rgba(91,141,255,.16); --nav-bg-2: rgba(91,141,255,.06); --nav-glow: rgba(91,141,255,.2); --nav-glow-strong: rgba(91,141,255,.42); color: #c9d8ff; }
.topnav a[href="/setup.html"] { --nav-accent: rgba(255,190,60,.6); --nav-accent-strong: rgba(255,210,110,.95); --nav-bg-1: rgba(255,190,60,.14); --nav-bg-2: rgba(255,190,60,.05); --nav-glow: rgba(255,190,60,.18); --nav-glow-strong: rgba(255,190,60,.4); color: #ffe2a8; }
.topbar-cta {
  margin-left: 0;
  background: var(--grad); color: #05070f; font-weight: 700; font-size: 15px;
  padding: 11px 20px; border-radius: 11px;
  box-shadow: 0 0 24px rgba(91, 141, 255, .45), 0 0 0 1px rgba(255,255,255,.1) inset;
  transition: .18s;
}
.topbar-cta:hover { color: #05070f; transform: translateY(-1px); box-shadow: 0 0 32px rgba(91, 141, 255, .7), 0 0 0 1px rgba(255,255,255,.18) inset; }
/* Nút phụ: Liên Hệ — viền vàng, nền tối (giữ style cũ) */
.topbar-cta-2 {
  margin-left: 0;
  background: transparent; color: #ffd98a; cursor: pointer;
  border: 1px solid rgba(255,190,60,.5); box-shadow: none; font-family: var(--sans);
}
.topbar-cta-2:hover { color: #2a1c00; background: var(--grad-gold); border-color: transparent; box-shadow: 0 0 24px rgba(255,190,60,.5); }

/* ── Popup QR nhóm hỗ trợ ─────────────────────────────── */
.qr-modal { position: fixed; inset: 0; z-index: 300; display: grid; place-items: center; padding: 20px; }
.qr-backdrop { position: absolute; inset: 0; background: rgba(5,8,15,.72); backdrop-filter: blur(6px); }
.qr-dialog {
  position: relative; z-index: 1; width: min(560px, 100%); text-align: center;
  background: linear-gradient(180deg, rgba(255,190,60,.08), var(--panel-2));
  border: 1px solid rgba(255,190,60,.4); border-radius: var(--r-lg);
  padding: 26px 24px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,190,60,.3);
  animation: qr-pop .22s ease;
}
@keyframes qr-pop { from { opacity: 0; transform: scale(.94) translateY(10px); } to { opacity: 1; transform: none; } }
.qr-close {
  position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; border-radius: 9px;
  background: rgba(255,255,255,.06); border: 1px solid var(--line-strong); color: var(--text-2);
  font-size: 20px; line-height: 1; cursor: pointer; transition: .15s;
}
.qr-close:hover { color: #ffd98a; border-color: rgba(255,190,60,.5); }
.qr-dialog h3 { font-family: var(--display); font-weight: 700; font-size: 21px; color: #ffd98a; margin: 4px 0 4px; letter-spacing: -.01em; }
.qr-sub { font-size: 13px; color: var(--muted); margin: 0 0 18px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.qr-item { display: flex; flex-direction: column; align-items: center; }
.qr-img { width: 100%; max-width: 220px; height: auto; border-radius: 14px; background: #fff; padding: 8px; box-shadow: 0 12px 34px rgba(0,0,0,.4); }
.qr-cap { font-size: 13px; color: var(--text-2); margin: 10px 0 6px; }
.qr-link { font-size: 13px; font-weight: 700; color: #ffd98a; }
.qr-link:hover { color: #fff; }
.qr-link-note { font-size: 12.5px; color: var(--muted); }
.qr-hint { font-size: 13px; color: var(--text-2); margin: 18px 0 0; }
@media (max-width: 480px) { .qr-grid { grid-template-columns: 1fr; } }

/* ── Popup THÔNG BÁO (admin bật/tắt) ──────────────────── */
.announce-modal { position: fixed; inset: 0; z-index: 360; display: grid; place-items: center; padding: 20px; }
.announce-backdrop { position: absolute; inset: 0; background: rgba(5,8,15,.74); backdrop-filter: blur(6px); }
.announce-dialog {
  position: relative; z-index: 1; width: min(520px, 100%);
  background: linear-gradient(180deg, rgba(56,232,255,.08), var(--panel-2));
  border: 1px solid rgba(56,232,255,.38); border-radius: var(--r-lg);
  padding: 30px 26px 26px; box-shadow: var(--shadow-lg), 0 0 0 1px rgba(56,232,255,.25);
  animation: qr-pop .22s ease;
}
.announce-close {
  position: absolute; top: 12px; right: 12px; width: 34px; height: 34px; border-radius: 9px;
  background: rgba(255,255,255,.06); border: 1px solid var(--line-strong); color: var(--text-2);
  font-size: 20px; line-height: 1; cursor: pointer; transition: .15s;
}
.announce-close:hover { color: var(--cyan); border-color: rgba(56,232,255,.5); }
.announce-badge {
  display: inline-block; font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase; color: var(--cyan);
  background: rgba(56,232,255,.1); border: 1px solid rgba(56,232,255,.28);
  border-radius: 999px; padding: 4px 12px; margin-bottom: 12px;
}
.announce-dialog h3 {
  font-family: var(--display); font-weight: 700; font-size: 24px; line-height: 1.2;
  color: var(--text); margin: 0 0 12px; letter-spacing: -.01em;
}
.announce-body {
  font-size: 15px; line-height: 1.62; color: var(--text-2);
  max-height: 46vh; overflow-y: auto; white-space: normal;
}
.announce-body a { color: var(--cyan); font-weight: 600; }
.announce-cta {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; margin-top: 20px; padding: 12px 22px; border-radius: 12px;
  font-family: var(--display); font-weight: 700; font-size: 16px; letter-spacing: .01em;
  color: #06232b; background: var(--grad); border: none;
  box-shadow: 0 10px 26px rgba(56,232,255,.28); transition: transform .15s, box-shadow .15s;
}
.announce-cta:hover { transform: translateY(-1px); box-shadow: 0 14px 32px rgba(56,232,255,.4); }
.announce-dismiss {
  display: block; width: 100%; margin-top: 16px; padding: 11px 18px; border-radius: 11px;
  background: rgba(255,255,255,.05); border: 1px solid var(--line-strong);
  color: var(--text-2); font-family: var(--sans); font-weight: 600; font-size: 14px;
  cursor: pointer; transition: .15s;
}
.announce-dismiss:hover { color: var(--text); border-color: rgba(56,232,255,.4); background: rgba(56,232,255,.06); }
@media (max-width: 480px) {
  .announce-dialog { padding: 26px 18px 22px; }
  .announce-dialog h3 { font-size: 21px; }
}

.nav-toggle {
  display: none; margin-left: auto;
  border: 1px solid var(--line-strong); background: var(--panel); color: var(--text);
  width: 42px; height: 42px; border-radius: 11px; font-size: 20px; cursor: pointer;
}

/* ---------- Mobile menu ---------- */
.mobile-menu {
  position: sticky; top: var(--topbar-h); z-index: 99;
  background: var(--panel); border-bottom: 1px solid var(--line);
  padding: 8px clamp(14px, 3vw, 34px);
  display: flex; flex-direction: column; box-shadow: var(--shadow);
}
.mobile-menu a { padding: 12px 6px; border-bottom: 1px solid var(--line); color: var(--text-2); font-weight: 600; }
.mobile-menu a:last-child { border-bottom: 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(56px, 9vw, 110px) clamp(18px, 4vw, 40px) clamp(34px, 5vw, 64px);
  max-width: 1180px; margin: 0 auto; text-align: center; overflow: hidden;
}
.hero-inner { position: relative; z-index: 2; max-width: 880px; margin: 0 auto; }
.hero-logo {
  display: block; width: clamp(120px, 20vw, 190px); height: auto; margin: 0 auto 20px;
  border-radius: 24px;
  filter: drop-shadow(0 0 40px rgba(56, 232, 255, .35));
  animation: logo-float 6s ease-in-out infinite;
}
@keyframes logo-float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-weight: 500; font-size: 12.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--cyan);
  background: rgba(56, 232, 255, .08); border: 1px solid rgba(56, 232, 255, .25);
  padding: 7px 15px; border-radius: 999px;
}
.eyebrow::before { content: "●"; font-size: 8px; color: var(--green); }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(38px, 6.6vw, 68px); line-height: 1.04; letter-spacing: 0;
  margin: 22px 0 18px; color: var(--text); text-transform: uppercase;
}
.hero h1 em { font-style: normal; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub {
  font-family: var(--sans); font-size: 15px; font-weight: 400;
  line-height: 1.65; color: var(--text-2); max-width: 730px; margin: 0 auto 30px;
}
.hero-sub strong { color: var(--text); font-weight: 700; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
/* Usage realtime CTA — khung vàng sáng nổi bật */
.usage-cta {
  margin-top: 22px; text-align: center;
  display: inline-block; padding: 16px 22px;
  background: linear-gradient(180deg, rgba(255,190,60,.14), rgba(255,190,60,.04));
  border: 1px solid rgba(255,190,60,.5); border-radius: var(--r-lg);
  box-shadow: 0 0 0 1px rgba(255,190,60,.25), 0 10px 30px rgba(255,190,60,.15);
}
.usage-cta-label { display: block; font-size: 13.5px; font-weight: 600; color: #ffd98a; margin-bottom: 12px; }
.usage-cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn-usage {
  font-family: var(--sans); font-weight: 800; font-size: 14px;
  padding: 10px 18px; border-radius: 11px;
  background: linear-gradient(180deg, #22d3ee, #06b6d4);
  color: #06232b; border: 1px solid rgba(34,211,238,.65);
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-usage::before { content: "●"; font-size: 10px; color: #06232b; }
.btn-usage:hover { color: #06232b; background: linear-gradient(180deg, #4fe3f5, #0fc7e0); border-color: transparent; box-shadow: 0 0 26px rgba(34,211,238,.55); transform: translateY(-1px); }
.btn-usage:hover::before { color: #06232b; }
.hero-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 32px; }
.hbadge {
  font-family: var(--mono); font-size: 12.5px; font-weight: 500; color: var(--text-2);
  background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 15px;
}
.hero-glow {
  position: absolute; inset: -30% 25% auto 25%; height: 480px; z-index: 1;
  background: radial-gradient(circle, rgba(91, 141, 255, .28), transparent 60%),
              radial-gradient(circle at 70% 40%, rgba(176, 108, 255, .22), transparent 62%);
  filter: blur(50px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-weight: 800; font-size: 14px; border-radius: 12px; cursor: pointer;
  padding: 11px 20px; border: 1px solid transparent; transition: .18s;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #05070f; box-shadow: 0 0 26px rgba(91, 141, 255, .4); }
.btn-primary:hover { color: #05070f; box-shadow: 0 0 38px rgba(91, 141, 255, .65); }
.btn-ghost { background: var(--panel); color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { color: var(--cyan); border-color: var(--cyan); }
.btn-setup-gold {
  background: linear-gradient(135deg, #ffe08a 0%, #ffc24d 52%, #f0a020 100%);
  color: #201400; border-color: rgba(255,224,138,.75);
  box-shadow: 0 0 28px rgba(255,190,60,.34), 0 0 0 1px rgba(255,255,255,.14) inset;
}
.btn-setup-gold:hover {
  color: #201400; border-color: rgba(255,224,138,.95);
  box-shadow: 0 0 40px rgba(255,190,60,.56), 0 10px 28px rgba(240,160,32,.22);
}

/* ---------- Font normalization: nội dung khách hàng dùng font sans chung ---------- */
.hero-sub,
.hero-actions .btn,
.usage-cta,
.hero-badges,
.sec p,
.callout,
.benefit-card,
.example-card,
.plan-note-card,
.buy-cta-note,
.faq-body,
.footer {
  font-family: var(--sans);
}

.buy-cta {
  margin-top: 22px; padding: 22px; text-align: center;
  background: linear-gradient(135deg, rgba(56,232,255,.06), rgba(176,108,255,.06));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
}
.buy-cta .btn { font-size: 16px; padding: 15px 30px; }
.buy-cta-note { font-size: 13.5px; color: var(--muted); margin: 14px auto 0; max-width: 560px; }

.setup-gold-cta {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  margin: 22px auto 0; width: min(720px, 100%); min-height: 92px; padding: 18px 28px;
  border-radius: var(--r-lg); border: 1px solid rgba(255,201,90,.62);
  background: linear-gradient(135deg, rgba(255,224,138,.96), rgba(255,194,77,.92) 48%, rgba(240,160,32,.94));
  color: #1f1400; box-shadow: 0 18px 50px rgba(255,190,60,.24), 0 0 0 1px rgba(255,255,255,.16) inset;
  text-align: center; transition: transform .18s, box-shadow .18s;
}
.setup-gold-cta span { font-family: var(--sans); font-weight: 900; font-size: clamp(18px, 2.8vw, 26px); }
.setup-gold-cta small { font-family: var(--sans); font-weight: 800; font-size: 13px; color: rgba(31,20,0,.78); }
.setup-gold-cta:hover { color: #1f1400; transform: translateY(-2px); box-shadow: 0 24px 64px rgba(255,190,60,.34), 0 0 0 1px rgba(255,255,255,.2) inset; }

/* ---------- Layout ---------- */
.layout {
  max-width: 1180px; margin: 0 auto;
  padding: 20px clamp(16px, 5vw, 44px) 40px;
  display: block;
}

/* ---------- TOC: luôn hiện, trượt từ trái vào khi load ---------- */
.toc {
  position: fixed; top: calc(var(--topbar-h) + 28px); left: 24px;
  z-index: 80; width: 232px;
  max-height: calc(100vh - var(--topbar-h) - 56px); overflow-y: auto;
  background: rgba(14, 21, 36, .6); backdrop-filter: blur(10px);
  border: 1px solid var(--line); border-radius: var(--r);
  padding: 18px;
  animation: toc-slide-in .65s cubic-bezier(.16, 1, .3, 1) both;
}
@keyframes toc-slide-in {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}
.toc-title { font-family: var(--mono); font-weight: 500; font-size: 11.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 12px; padding-left: 14px; }
.toc-list { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line-strong); }
.toc-list a {
  display: block; padding: 8px 14px; margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--muted); font-size: 13.5px; font-weight: 600; transition: .15s;
}
.toc-list a:hover { color: var(--text); }
.toc-list a.is-active { color: var(--cyan); border-left-color: var(--cyan); background: linear-gradient(90deg, rgba(56,232,255,.08), transparent); }
.toc-support { margin-top: 22px; padding: 16px; border-radius: var(--r); background: var(--panel-2); border: 1px solid var(--line); }
.toc-support-title { margin: 0 0 4px; font-weight: 700; color: var(--text); font-size: 14px; }
.toc-support-line { margin: 0; font-size: 12.5px; color: var(--muted); }
.toc-support-phone { display: inline-block; margin-top: 6px; font-family: var(--display); font-weight: 700; font-size: 18px; color: var(--green); }
.toc-support-phone:hover { color: #7ff3d9; }

/* ---------- Sections ---------- */
.content { min-width: 0; }
.sec { padding: 40px 0; border-top: 1px solid var(--line); scroll-margin-top: calc(var(--topbar-h) + 16px); }
.sec:first-child { border-top: 0; padding-top: 8px; }
.sec-kicker {
  display: inline-block; font-family: var(--mono); font-weight: 500; font-size: 12px;
  letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); margin-bottom: 8px;
}
.sec h2 { font-family: var(--display); font-weight: 700; font-size: clamp(27px, 3.8vw, 40px); line-height: 1.1; letter-spacing: 0; color: var(--text); margin: 0 0 14px; text-transform: uppercase; }
.sec p { margin: 0 0 14px; color: var(--text-2); }
.sec h3 { font-family: var(--display); font-weight: 600; font-size: 18px; color: var(--text); margin: 0 0 6px; }
.sec b, .sec strong { color: var(--text); }

/* ---------- Flow ---------- */
.flow { display: flex; align-items: stretch; gap: 12px; flex-wrap: wrap; margin: 24px 0; }
.flow-step {
  flex: 1 1 160px; position: relative; overflow: hidden;
  background: linear-gradient(180deg, rgba(255,190,60,.12), var(--panel));
  border: 1px solid transparent; border-radius: var(--r);
  box-shadow: 0 0 0 1px rgba(255,190,60,.3);
  padding: 18px 16px; transition: .18s;
}
.flow-step::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 3px;
  background: var(--grad-gold);
}
.flow-step:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(255,190,60,.24); }
.flow-num {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--grad-gold); border: 0; color: #2a1c00;
  font-family: var(--display); font-weight: 700; font-size: 17px; margin-bottom: 10px;
  box-shadow: 0 4px 14px rgba(255,190,60,.4);
}
.flow-step h3 { font-size: 16px; margin-bottom: 3px; color: var(--text); }
.flow-step p { font-size: 13.5px; margin: 0; color: var(--text-2); }
.flow-arrow { align-self: center; font-size: 20px; background: var(--grad-gold); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Callouts ---------- */
.callout {
  border-radius: var(--r); padding: 16px 18px; margin: 18px 0;
  border: 1px solid var(--line); background: var(--panel); font-size: 14.5px; color: var(--text-2);
}
.callout ul { margin: 8px 0 0; padding-left: 20px; }
.callout li { margin: 4px 0; }
.callout-info { border-left: 3px solid var(--blue); }
/* Legacy list styles (giữ để tương thích, không còn dùng ở nội dung Unified Credit) */
.product-lines { list-style: none; margin: 10px 0 8px; padding: 0; }
.product-lines li { margin: 8px 0; padding: 10px 14px; border-radius: 10px; border-left: 3px solid transparent; font-size: 14px; }
.pl-claude { background: rgba(224,129,87,.1); border-left-color: #e08157; }
.pl-claude b { color: #f0a06b; }
.pl-codex { background: rgba(56,232,255,.09); border-left-color: #38e8ff; }
.pl-codex b { color: #5bc8ff; }
.model-hl { color: #ffd98a; font-weight: 700; }
.callout-tip { border-left: 3px solid var(--green); }
.callout-warn { border-left: 3px solid var(--amber); }

/* ---------- Steps ---------- */
.steps { list-style: none; counter-reset: step; margin: 22px 0; padding: 0; }
.steps > li { position: relative; counter-increment: step; padding: 4px 0 24px 56px; margin: 0; }
.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 38px; height: 38px; border-radius: 11px;
  background: var(--panel-2); border: 1px solid var(--line-strong); color: var(--cyan);
  font-family: var(--display); font-weight: 700; font-size: 16px;
  display: grid; place-items: center; box-shadow: 0 0 16px rgba(56,232,255,.14);
}
.steps > li::after { content: ""; position: absolute; left: 18px; top: 46px; bottom: 6px; width: 1px; background: linear-gradient(var(--line-strong), transparent); }
.steps > li:last-child::after { display: none; }
.steps p { font-size: 14.5px; }

/* Chips */
.chip {
  display: inline-block; font-size: 12.5px; font-weight: 600;
  background: rgba(91,141,255,.1); border: 1px solid var(--line-strong); color: #a9c4ff;
  padding: 3px 10px; border-radius: 999px; margin: 2px 3px;
}
.chip-buy { background: rgba(46,230,166,.12); border-color: rgba(46,230,166,.3); color: #7ff3d9; }

.provider-claude-callout {
  color: #ffe8a8;
  border-color: rgba(255, 201, 90, .72);
  background:
    radial-gradient(circle at 12% 0%, rgba(255,224,138,.22), transparent 34%),
    linear-gradient(180deg, rgba(255,190,60,.17), rgba(255,190,60,.055));
  box-shadow: 0 0 0 1px rgba(255,224,138,.18) inset, 0 18px 46px rgba(255,190,60,.16);
}
.provider-claude-callout strong,
.provider-claude-callout b { color: #fff2c2; }
.provider-usage-link {
  color: #38e8ff;
  font-weight: 900;
  text-decoration: none;
  border-bottom: 1px solid rgba(56,232,255,.55);
  text-shadow: 0 0 16px rgba(56,232,255,.45);
}
.provider-usage-link:hover {
  color: #9ff6ff;
  border-bottom-color: rgba(159,246,255,.9);
}

/* ---------- Mini cards ---------- */
.mini-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 12px 0; }
.mini-card { background: linear-gradient(180deg, rgba(255,190,60,.06), var(--panel)); border: 1px solid rgba(255,190,60,.3); border-radius: var(--r); padding: 16px; transition: .16s; }
.mini-card:hover { border-color: var(--line-strong); }
.mini-card .mini-ic { font-size: 22px; }
.mini-card b { display: block; margin: 6px 0 4px; color: var(--text); }
.mini-card p { font-size: 13.5px; color: var(--muted); margin: 0; }

/* ---------- Group explain ---------- */
.group-explain { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.ge-row { display: grid; grid-template-columns: 210px 1fr; gap: 14px; align-items: start; background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 14px; }
.ge-tag { font-weight: 700; font-size: 14px; padding: 6px 12px; border-radius: 10px; align-self: start; }
.ge-vip { background: rgba(255,180,84,.12); color: var(--amber); border: 1px solid rgba(255,180,84,.28); }
.ge-month { background: rgba(91,141,255,.12); color: #a9c4ff; border: 1px solid var(--line-strong); }
.ge-bulk { background: rgba(46,230,166,.12); color: #7ff3d9; border: 1px solid rgba(46,230,166,.28); }
.ge-row p { margin: 0; font-size: 14px; }

/* ---------- Tabs (price + os) ---------- */
.price-tabs, .os-tabs {
  display: inline-flex; gap: 4px; flex-wrap: wrap; margin: 18px 0 16px;
  padding: 5px; background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
}
.ptab, .ostab {
  border: 0; background: transparent; color: var(--muted);
  font-family: var(--sans); font-weight: 600; font-size: 13.5px; padding: 8px 16px; border-radius: 999px; cursor: pointer; transition: .15s;
}
.ptab:hover, .ostab:hover { color: var(--text); }
.ptab.is-active, .ostab.is-active { background: var(--grad); color: #05070f; box-shadow: 0 0 18px rgba(91,141,255,.35); }

/* Shared purchase-card selectors remain because shop.html still renders plan-grid and plan-card. */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(212px, 1fr));
  gap: 14px; margin: 4px 0;
}
.plan-card {
  position: relative; background: linear-gradient(180deg, rgba(255,190,60,.1), var(--panel));
  border: 1px solid transparent; border-radius: var(--r-lg);
  padding: 24px 18px 20px; text-align: center; overflow: hidden; transition: .2s ease;
  box-shadow: 0 0 0 1px rgba(255,190,60,.28);
}
.plan-card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad-gold); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: .9; transition: opacity .2s;
}
.plan-card:hover { transform: translateY(-5px); box-shadow: 0 18px 44px rgba(255,190,60,.28); }
.plan-card:hover::before { opacity: 1; }
.plan-ic { font-size: 30px; display: block; line-height: 1; margin-bottom: 8px; }
.plan-name { font-family: var(--display); font-weight: 600; font-size: 16px; color: var(--text); margin: 0 0 12px; letter-spacing: -.01em; }
.plan-card .plan-price {
  font-family: var(--display); font-weight: 700; font-size: 27px; letter-spacing: -.03em; margin: 0;
  background: var(--grad-gold); -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
}
.plan-card .plan-price span { font-size: 15px; -webkit-text-fill-color: #ffc24d; }
.plan-card .plan-quota { font-size: 14px; font-weight: 700; color: #ffd98a; margin: 12px 0 3px; }
.plan-card .plan-term { font-family: var(--mono); font-size: 11.5px; font-weight: 600; color: #ffc24d; margin: 0; letter-spacing: .04em; text-transform: uppercase; }
.plan-gift {
  margin: 12px -18px -20px; padding: 9px 12px;
  background: rgba(46,230,166,.12); border-top: 1px solid rgba(46,230,166,.28);
  color: #7ff3d9; font-size: 12px; font-weight: 600; line-height: 1.35;
}
.plan-gift b { color: #a6ffe0; }
.plan-card.plan-codex .plan-gift { background: rgba(56,232,255,.1); border-top-color: rgba(56,232,255,.28); color: #9fe9ff; }
.plan-card.plan-codex .plan-gift b { color: #cdf4ff; }

.plan-card.is-featured { border-color: transparent; box-shadow: 0 0 0 1px rgba(255,190,60,.4), 0 18px 44px rgba(255,190,60,.2); background: linear-gradient(180deg, rgba(255,190,60,.1), var(--panel)); }
.plan-card.is-featured::before { opacity: 1; }
.plan-ribbon {
  position: absolute; top: 13px; right: -34px; transform: rotate(45deg);
  background: var(--grad-gold); color: #2a1c00; font-size: 10px; font-weight: 800;
  letter-spacing: .03em; padding: 4px 38px; box-shadow: 0 4px 12px rgba(0,0,0,.4);
}
.plan-badge {
  position: absolute; top: 13px; right: 13px;
  background: rgba(255,190,60,.16); color: #ffd98a; border: 1px solid rgba(255,190,60,.35);
  font-size: 11px; font-weight: 800; padding: 3px 9px; border-radius: 999px;
}
/* VIP — vàng hoàng kim như các gói Claude khác (bỏ mọi override tối) */
.plan-card.plan-dark { }
/* Codex — xanh cyan (nền + viền + glow cyan, khác Claude vàng) */
.plan-card.plan-codex { background: linear-gradient(180deg, rgba(56,232,255,.1), var(--panel)); box-shadow: 0 0 0 1px rgba(56,232,255,.28); }
.plan-card.plan-codex::before { background: var(--grad-green); }
.plan-card.plan-codex:hover { box-shadow: 0 18px 44px rgba(56,232,255,.28); }
.plan-card.plan-codex .plan-price { background: var(--grad-green); -webkit-background-clip: text; background-clip: text; }
.plan-card.plan-codex.is-featured { box-shadow: 0 0 0 1px rgba(56,232,255,.45), 0 18px 44px rgba(56,232,255,.22); background: linear-gradient(180deg, rgba(56,232,255,.14), var(--panel)); }
.plan-card.plan-codex .plan-ribbon { background: var(--grad-green); color: #05070f; }
.plan-card.plan-codex .plan-badge { background: rgba(56,232,255,.14); color: #7ff3ff; border-color: rgba(56,232,255,.35); }
.plan-card.plan-codex .plan-quota { color: #7ff3ff; }
.plan-card.plan-codex .plan-term { color: #38e8ff; }
.plan-card.plan-codex .plan-price span { -webkit-text-fill-color: #38e8ff; }
/* VIP Opus 4.7 — tím magenta (nhóm model riêng) */
.plan-card.plan-op47 { background: linear-gradient(180deg, rgba(200,107,255,.1), var(--panel)); box-shadow: 0 0 0 1px rgba(200,107,255,.3); }
.plan-card.plan-op47::before { background: var(--grad-magenta); }
.plan-card.plan-op47:hover { box-shadow: 0 18px 44px rgba(200,107,255,.3); }
.plan-card.plan-op47 .plan-price { background: var(--grad-magenta); -webkit-background-clip: text; background-clip: text; }
.plan-card.plan-op47.is-featured { box-shadow: 0 0 0 1px rgba(200,107,255,.45), 0 18px 44px rgba(200,107,255,.22); background: linear-gradient(180deg, rgba(200,107,255,.14), var(--panel)); }
.plan-card.plan-op47 .plan-ribbon { background: var(--grad-magenta); color: #1a0524; }
.plan-card.plan-op47 .plan-badge { background: rgba(200,107,255,.16); color: #e6b3ff; border-color: rgba(200,107,255,.4); }
.plan-card.plan-op47 .plan-quota { color: #e6b3ff; }
.plan-card.plan-op47 .plan-term { color: #d08aff; }
.plan-card.plan-op47 .plan-price span { -webkit-text-fill-color: #d08aff; }
.plan-card.plan-op47 .plan-gift { background: rgba(200,107,255,.1); border-top-color: rgba(200,107,255,.28); color: #e6c6ff; }
.plan-card.plan-op47 .plan-gift b { color: #f2ddff; }
/* VIP Opus 4.6 — cyan (nhóm model riêng) */
.plan-card.plan-op46 { background: linear-gradient(180deg, rgba(56,232,255,.1), var(--panel)); box-shadow: 0 0 0 1px rgba(56,232,255,.28); }
.plan-card.plan-op46::before { background: var(--grad-green); }
.plan-card.plan-op46:hover { box-shadow: 0 18px 44px rgba(56,232,255,.28); }
.plan-card.plan-op46 .plan-price { background: var(--grad-green); -webkit-background-clip: text; background-clip: text; }
.plan-card.plan-op46.is-featured { box-shadow: 0 0 0 1px rgba(56,232,255,.45), 0 18px 44px rgba(56,232,255,.22); background: linear-gradient(180deg, rgba(56,232,255,.14), var(--panel)); }
.plan-card.plan-op46 .plan-ribbon { background: var(--grad-green); color: #05070f; }
.plan-card.plan-op46 .plan-badge { background: rgba(56,232,255,.14); color: #7ff3ff; border-color: rgba(56,232,255,.35); }
.plan-card.plan-op46 .plan-quota { color: #7ff3ff; }
.plan-card.plan-op46 .plan-term { color: #38e8ff; }
.plan-card.plan-op46 .plan-price span { -webkit-text-fill-color: #38e8ff; }
.plan-card.plan-op46 .plan-gift { background: rgba(56,232,255,.1); border-top-color: rgba(56,232,255,.28); color: #9fe9ff; }
.plan-card.plan-op46 .plan-gift b { color: #cdf4ff; }

/* Grok 4.5 — nhận diện cam/gold, tách khỏi Codex (xanh) & VIP (magenta). */
.plan-card.plan-grok { background: linear-gradient(180deg, rgba(255,160,60,.1), var(--panel)); box-shadow: 0 0 0 1px rgba(255,160,60,.3); }
.plan-card.plan-grok::before { background: var(--grad-gold); }
.plan-card.plan-grok:hover { box-shadow: 0 18px 44px rgba(255,160,60,.28); }
.plan-card.plan-grok .plan-price { background: var(--grad-gold); -webkit-background-clip: text; background-clip: text; }
.plan-card.plan-grok.is-featured { box-shadow: 0 0 0 1px rgba(255,160,60,.45), 0 18px 44px rgba(255,160,60,.22); background: linear-gradient(180deg, rgba(255,160,60,.14), var(--panel)); }
.plan-card.plan-grok .plan-ribbon { background: var(--grad-gold); color: #2a1c00; }
.plan-card.plan-grok .plan-quota { color: #ffd08a; }
.plan-card.plan-grok .plan-term { color: #f0a020; }
.plan-card.plan-grok .plan-price span { -webkit-text-fill-color: #f0a020; }
.plan-note-grok { border-color: rgba(255,160,60,.4); background: linear-gradient(180deg, rgba(255,160,60,.07), var(--panel)); }

.plan-note-card {
  grid-column: 1 / -1; background: var(--panel); border: 1px dashed var(--line-strong);
  border-radius: var(--r); padding: 14px 18px; font-size: 13.5px; color: var(--text-2);
}
.km { display: inline-block; font-size: 11px; font-weight: 700; color: #7ff3d9; background: rgba(46,230,166,.14); padding: 1px 6px; border-radius: 6px; margin-left: 4px; }

/* ---------- Wizard ---------- */
.wizard {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  padding: clamp(16px, 3vw, 26px); margin: 22px 0; box-shadow: var(--shadow);
}
.wizard-step { padding: 16px 0; border-top: 1px solid var(--line); }
.wizard-step:first-child { border-top: 0; padding-top: 0; }
.wizard-label { font-family: var(--display); font-weight: 600; font-size: 15px; color: var(--text); margin: 0 0 12px; }
.wizard-hint { font-size: 13px; color: var(--muted); margin: 10px 0 0; }
.wizard-warn { display: none; color: var(--danger); font-weight: 600; font-size: 13.5px; margin: 8px 0 0; }
.wizard-warn.is-visible { display: block; }

/* Bộ chọn công cụ (Claude ⇆ Codex) ở đầu Bước 3 — card đứng riêng, ngoài .wizard. */
.tool-picker {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg);
  padding: clamp(16px, 3vw, 26px); margin: 22px 0 0; box-shadow: var(--shadow);
  border-top: 1px solid var(--line-strong);
}
.tool-body-intro { margin: 22px 0 0; color: var(--muted); }

.model-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.model-opt {
  text-align: left; cursor: pointer; transition: .16s;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r);
  padding: 15px 16px; color: var(--text-2);
}
.model-opt b { display: block; font-family: var(--display); font-size: 15px; color: var(--text); }
.model-opt small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 4px; }
.model-opt small code { font-size: 11.5px; }
.model-opt:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.model-opt.is-selected { border-color: transparent; box-shadow: var(--glow); background: linear-gradient(180deg, rgba(91,141,255,.1), var(--panel)); }
.model-opt.is-selected b { color: var(--cyan); }

/* Tag màu nhận diện trong nút chọn (server / gói) — pill nhỏ cạnh tiêu đề. */
.opt-tag {
  display: inline-block; vertical-align: middle; margin-left: 8px;
  font-family: var(--display); font-weight: 700; font-size: 10.5px; letter-spacing: .04em;
  text-transform: uppercase; padding: 2px 8px; border-radius: 999px;
  border: 1px solid transparent; line-height: 1.5; white-space: nowrap;
}
.tag-net    { background: rgba(56,232,255,.14);  color: #7ff3ff; border-color: rgba(56,232,255,.4); }
.tag-com    { background: rgba(200,107,255,.16); color: #e6b3ff; border-color: rgba(200,107,255,.42); }
.tag-credit { background: rgba(255,201,90,.16);  color: #ffd98a; border-color: rgba(255,201,90,.42); }
.tag-v47    { background: rgba(200,107,255,.16); color: #e6b3ff; border-color: rgba(200,107,255,.42); }
.tag-v46    { background: rgba(56,232,255,.14);  color: #7ff3ff; border-color: rgba(56,232,255,.4); }

/* Viền trái màu để mỗi lựa chọn dễ phân biệt kể cả khi chưa chọn. */
.model-opt.srv-net        { border-left: 3px solid rgba(56,232,255,.6); }
.model-opt.srv-com        { border-left: 3px solid rgba(200,107,255,.6); }
.model-opt.plan-tag-credit{ border-left: 3px solid rgba(255,201,90,.7); }
.model-opt.plan-tag-v47   { border-left: 3px solid rgba(200,107,255,.7); }
.model-opt.plan-tag-v46   { border-left: 3px solid rgba(56,232,255,.7); }

.key-row { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.key-input {
  width: 100%; border: 1px solid var(--line-strong); background: var(--bg-2); color: var(--text);
  border-radius: 11px; padding: 13px 15px; font: 14px/1.5 var(--mono); outline: none;
}
.key-input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(56,232,255,.15); }
.key-input::placeholder { color: var(--dim); }

/* ---------- Code blocks ---------- */
.code-block { border: 1px solid var(--line-strong); border-radius: var(--r); overflow: hidden; margin: 12px 0; background: #0f1830; }
.code-block.code-sm { margin: 8px 0; }
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; background: rgba(255,255,255,.03); border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 12px; color: var(--muted);
}
.code {
  margin: 0; padding: 14px 16px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.7; color: #cdd9f0;
  white-space: pre-wrap; word-break: break-word;
}
.code code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.copy-btn {
  border: 1px solid var(--line-strong); background: var(--panel); color: #a9c4ff;
  font-family: var(--mono); font-size: 11.5px; padding: 5px 12px; border-radius: 8px; cursor: pointer; transition: .15s;
}
.copy-btn:hover { border-color: var(--cyan); color: var(--cyan); }
.copy-btn.copied { background: var(--green); border-color: var(--green); color: #05070f; }
.cmd-hint { font-size: 13.5px; color: var(--muted); margin: 4px 0 0; }
.cmd-panel { margin-top: 4px; }

/* ---------- Tool cards ---------- */
.tool-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 20px 0; }
.tool-card { position: relative; background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 20px; padding-left: 22px; transition: .18s; overflow: hidden; }
.tool-card:hover { border-color: var(--line-strong); transform: translateY(-3px); box-shadow: var(--shadow); }
.tool-card-wide { grid-column: 1 / -1; }
.tool-card-wide ol ul { margin: 6px 0 0; padding-left: 20px; }
.tool-card-wide ol ul li { margin: 4px 0; }

/* ── Màu nhận diện từng app ─────────────────────────────────── */
.tc-vscode { --tc: #3aa0ff; --tc2: #0a63c9; }   /* VS Code · xanh dương */
.tc-cline  { --tc: #21d07a; --tc2: #0a9c56; }   /* Cline · xanh lục */
.tc-cursor { --tc: #a06bff; --tc2: #6f3ce0; }   /* Cursor · tím */
.tc-claude { --tc: #e08157; --tc2: #cc6b3d; }   /* Claude · cam Anthropic */
.tc-deepseek { --tc: #2ee6a6; --tc2: #12b981; } /* DeepSeek tặng · xanh lục */
.tool-card[class*="tc-"] {
  border-color: color-mix(in srgb, var(--tc) 38%, var(--line));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--tc) 9%, transparent), transparent 42%),
    var(--panel);
}
.tool-card[class*="tc-"]::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: linear-gradient(180deg, var(--tc), var(--tc2));
}
.tool-card[class*="tc-"]:hover {
  border-color: var(--tc);
  box-shadow: 0 18px 44px color-mix(in srgb, var(--tc) 26%, transparent), 0 0 0 1px color-mix(in srgb, var(--tc) 40%, transparent);
}
.tool-card[class*="tc-"] .tool-ic {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 11px;
  background: color-mix(in srgb, var(--tc) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--tc) 45%, transparent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--tc) 30%, transparent);
}
.tool-card[class*="tc-"] .tool-head h3 { color: color-mix(in srgb, var(--tc) 72%, #ffffff); }
.tool-card[class*="tc-"] code { background: color-mix(in srgb, var(--tc) 14%, transparent); border-color: color-mix(in srgb, var(--tc) 40%, transparent); color: color-mix(in srgb, var(--tc) 78%, #ffffff); }

.tool-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.tool-ic { font-size: 22px; }
.tool-head h3 { margin: 0; font-size: 17px; }
.tool-card ol { margin: 0; padding-left: 20px; color: var(--text-2); }
.tool-card ol li { margin: 7px 0; font-size: 14px; }
.tool-card ul.cli-lines { margin: 6px 0 0; padding-left: 20px; color: var(--text-2); list-style: disc; }
.tool-card ul.cli-lines li { margin: 10px 0; font-size: 14px; }
.tool-card p { font-size: 14px; color: var(--text-2); }
.tool-note { font-size: 13px; color: var(--muted); background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin: 12px 0 0; }

/* ---------- Cards 2 / info ---------- */
.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 16px 0; }
.info-card { background: linear-gradient(180deg, rgba(255,190,60,.06), var(--panel)); border: 1px solid rgba(255,190,60,.3); border-radius: var(--r); padding: 16px 18px; }
.info-card h3 { font-size: 16px; margin-bottom: 6px; }
.info-card p { font-size: 14px; margin: 0; color: var(--muted); }

/* ---------- Cmd cards ---------- */
.cmd-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; margin: 16px 0; }
.cmd-card { background: linear-gradient(180deg, rgba(255,190,60,.06), var(--panel)); border: 1px solid rgba(255,190,60,.3); border-radius: var(--r); padding: 16px; transition: .16s; }
.cmd-card:hover { border-color: var(--cyan); transform: translateY(-2px); }
.cmd-card code { font-size: 15px; font-weight: 700; background: rgba(56,232,255,.1); border-color: rgba(56,232,255,.25); color: var(--cyan); }
.cmd-card p { font-size: 13.5px; color: var(--muted); margin: 8px 0 0; }

/* ---------- Details ---------- */
.disc { margin: 14px 0; border: 1px solid rgba(255,190,60,.3); border-radius: var(--r); background: var(--panel); overflow: hidden; }
.disc summary { cursor: pointer; padding: 14px 18px; font-weight: 600; color: var(--text); list-style: none; display: flex; align-items: center; gap: 10px; }
.disc summary::-webkit-details-marker { display: none; }
.disc summary::before { content: "▸"; color: var(--cyan); font-size: 13px; transition: .2s; }
.disc[open] summary::before { transform: rotate(90deg); }
.disc-body { padding: 0 18px 16px; }
.disc-body p { font-size: 14px; color: var(--text-2); }

/* ---------- Hướng dẫn chi tiết Claude Desktop (có ảnh) ---------- */
.guide-disc { margin-top: 16px; border-color: var(--line-strong); background: var(--panel-2); }
.guide-disc > summary { font-family: var(--display); font-size: 15px; color: var(--cyan); }
.guide-steps { list-style: none; counter-reset: g; margin: 8px 0 0; padding: 0; }
.guide-steps > li { position: relative; counter-increment: g; padding: 0 0 22px 0; margin: 0; border-top: 1px dashed var(--line); padding-top: 18px; }
.guide-steps > li:first-child { border-top: 0; padding-top: 4px; }
.guide-steps h4 { font-family: var(--display); font-weight: 600; font-size: 16px; color: var(--text); margin: 0 0 8px; }
.guide-steps p, .guide-steps ul { font-size: 14px; color: var(--text-2); margin: 0 0 10px; }
.guide-steps ul { padding-left: 20px; }
.guide-steps ul li { margin: 4px 0; }
.guide-shot { margin: 10px 0; }
.guide-shot img {
  display: block; width: 100%; max-width: 560px; height: auto;
  border: 1px solid var(--line-strong); border-radius: var(--r);
  box-shadow: var(--shadow); background: #0f1830;
}
.guide-shot figcaption { font-size: 12.5px; color: var(--muted); margin-top: 6px; font-style: italic; }
.guide-fields { counter-reset: gf; margin: 0 0 10px; padding-left: 0; list-style: none; }
.guide-fields > li { position: relative; counter-increment: gf; padding: 6px 0 6px 30px; font-size: 14px; color: var(--text-2); border-bottom: 1px solid var(--line); }
.guide-fields > li:last-child { border-bottom: 0; }
.guide-fields > li::before {
  content: counter(gf); position: absolute; left: 0; top: 6px;
  width: 20px; height: 20px; border-radius: 6px; font-size: 11px; font-weight: 700;
  background: rgba(56,232,255,.12); border: 1px solid var(--line-strong); color: var(--cyan);
  display: grid; place-items: center;
}
.req { color: var(--danger); font-weight: 700; }
.ok-line { display: inline-block; background: rgba(46,230,166,.12); border: 1px solid rgba(46,230,166,.3); color: #7ff3d9; border-radius: 8px; padding: 1px 8px; font-size: 13px; font-weight: 600; margin: 2px 0; }
kbd {
  font-family: var(--mono); font-size: 11.5px; background: var(--bg-2);
  border: 1px solid var(--line-strong); border-bottom-width: 2px; border-radius: 6px;
  padding: 1px 7px; color: var(--text-2);
}

/* ---------- FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.faq-item { border: 1px solid rgba(255,190,60,.28); border-radius: var(--r); background: var(--panel); overflow: hidden; transition: .15s; }
.faq-item[open] { border-color: var(--line-strong); }
.faq-item summary { cursor: pointer; padding: 16px 20px; font-weight: 600; color: var(--text); font-size: 15px; list-style: none; display: flex; align-items: center; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; margin-left: auto; font-size: 22px; font-weight: 300; color: var(--cyan); transition: .2s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body { padding: 0 20px 18px; }
.faq-body p { font-size: 14.5px; margin: 0 0 8px; color: var(--text-2); }

/* ---------- Support ---------- */
.support {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: center;
  background: linear-gradient(135deg, var(--panel-2), #231a3a);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg); padding: clamp(22px, 4vw, 40px);
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.support::after { content: ""; position: absolute; inset: -40% 40% auto -10%; height: 300px; background: radial-gradient(circle, rgba(46,230,166,.18), transparent 60%); filter: blur(40px); }
.support > * { position: relative; z-index: 1; }
.support .sec-kicker { color: var(--green); }
.support h2 { color: var(--text); }
.support p { color: var(--text-2); }
.support-phone { display: inline-block; font-family: var(--display); font-weight: 700; font-size: clamp(22px, 3vw, 30px); color: var(--green); margin: 8px 0; }
.support-phone:hover { color: #7ff3d9; }
.support-note { font-size: 13.5px; color: var(--muted) !important; }
.support-qr { display: flex; justify-content: center; }
.support-qr img { width: auto; height: clamp(200px, 30vw, 320px); border-radius: var(--r); box-shadow: 0 16px 40px rgba(0,0,0,.5); background: #fff; padding: 8px; }

/* ---------- Footer ---------- */
.site-foot { text-align: center; padding: 40px 20px 60px; color: var(--muted); font-size: 13.5px; border-top: 1px solid var(--line); margin-top: 20px; }
.site-foot p { margin: 6px 0; }
.foot-links a { color: var(--muted); font-weight: 600; }
.foot-links a:hover { color: var(--cyan); }

/* ---------- To-top ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--grad); color: #05070f; border: 0; font-size: 20px; cursor: pointer;
  box-shadow: 0 0 24px rgba(91,141,255,.5); transition: .2s;
}
.to-top:hover { transform: translateY(-3px); }

/* ---------- Unified Credit V1: hero note, ba quyền lợi, bảng giá ---------- */
.hero-note {
  max-width: 640px; margin: 22px auto 0; font-size: 13.5px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--line); border-left: 3px solid var(--amber);
  border-radius: var(--r); padding: 12px 16px; text-align: left;
}

/* Ba quyền lợi — mỗi card một màu accent (credit=green, VIP=gold, DeepSeek=violet) */
.benefit-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin: 20px 0; }
.benefit-card {
  position: relative; overflow: hidden;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 22px 20px 20px; transition: .18s;
}
.benefit-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--bc, var(--blue)); }
.benefit-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--bc) 40%, var(--line)); box-shadow: 0 16px 40px color-mix(in srgb, var(--bc) 20%, transparent); }
.benefit-card h3 { font-family: var(--display); font-weight: 600; font-size: 19px; color: var(--text); margin: 10px 0 8px; }
.benefit-card p { font-size: 14px; color: var(--text-2); margin: 0 0 10px; }
.benefit-badge {
  display: inline-block; font-family: var(--mono); font-size: 11px; font-weight: 700;
  letter-spacing: .04em; text-transform: uppercase; color: var(--bc, var(--blue));
  background: color-mix(in srgb, var(--bc) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--bc) 32%, transparent);
  border-radius: 999px; padding: 4px 11px;
}
.benefit-card .btn { margin-top: 6px; }
.benefit-ids { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 10px; }
.benefit-ids code { font-size: 11.5px; }
.benefit-note { font-size: 12.5px !important; color: var(--muted) !important; background: var(--bg-2); border: 1px solid var(--line); border-radius: 9px; padding: 8px 11px; }
.bc-credit { --bc: var(--green); }
.bc-vip { --bc: var(--amber); }
.bc-deepseek { --bc: var(--violet); }

/* Cách quy đổi & tính phí */
.convert-block {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: center;
  background: linear-gradient(135deg, rgba(46,230,166,.08), rgba(91,141,255,.06));
  border: 1px solid var(--line-strong); border-radius: var(--r-lg); padding: 22px; margin: 6px 0 18px;
}
.convert-main { display: flex; flex-direction: column; gap: 6px; flex: 0 0 auto; }
.convert-eq { font-family: var(--hero); font-weight: 400; font-size: clamp(24px, 4vw, 34px); line-height: 1.05;
  background: var(--grad-green); -webkit-background-clip: text; background-clip: text; color: transparent; }
.convert-eq-2 { font-size: clamp(16px, 2.4vw, 20px); color: var(--text-2); background: none; -webkit-text-fill-color: currentColor; }
.convert-note { flex: 1 1 320px; margin: 0; font-size: 14px; color: var(--text-2); }
.example-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; margin: 12px 0; }
.example-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); padding: 15px 16px; }
.example-card h4 { font-family: var(--display); font-weight: 600; font-size: 15px; color: var(--cyan); margin: 0 0 6px; }
.example-card p { font-size: 13.5px; color: var(--text-2); margin: 0; }
.fine-note { font-size: 12.5px; color: var(--muted); margin: 14px 0 0; }

/* Bảng giá tham chiếu credit-v1 */
.price-wrap { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; margin: 6px 0 4px; }
.price-table {
  width: 100%; border-collapse: collapse; font-size: 14px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden;
}
.price-table caption {
  caption-side: top; text-align: left; font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: .04em; text-transform: uppercase; color: var(--muted); padding: 0 0 8px;
}
.price-table th, .price-table td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; }
.price-table thead th { background: rgba(91,141,255,.08); color: var(--text-2); font-weight: 700; font-size: 12.5px; }
.price-table tbody tr:last-child td { border-bottom: 0; }
.price-table tbody tr:hover { background: rgba(255,255,255,.03); }
.price-table .num { text-align: right; font-family: var(--mono); color: #ffd98a; font-weight: 600; }
.price-table th.num { color: var(--text-2); }
.price-table code { font-size: 12.5px; }

.foot-disclaimer { font-size: 12px; color: var(--dim); margin: 12px 0 0; max-width: 620px; margin-inline: auto; }

/* ---------- Responsive ---------- */
/* Thu toàn trang còn 90% trên tablet/desktop (điện thoại giữ 100% cho dễ đọc) */
@media (min-width: 741px) {
  body { zoom: 0.9; }
}

/* TOC chỉ hiện trên màn đủ rộng để không đè nội dung căn giữa; hẹp hơn thì ẩn */
@media (max-width: 1279px) {
  .toc { display: none; }
}

@media (max-width: 980px) {
  .topnav { display: none; }
  .nav-toggle { display: block; }
  .topbar-cta { display: none; }
}

/* Tablet nhỏ / điện thoại ngang */
@media (max-width: 740px) {
  .hero { padding: 40px 16px 30px; }
  .hero h1 { font-size: clamp(30px, 8vw, 44px); }
  .hero-sub { font-size: 15.5px; }
  .layout { padding: 16px 16px 32px; }
  .sec { padding: 30px 0; }
  .sec h2 { font-size: clamp(24px, 6.5vw, 30px); }
  .plan-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .tool-cards { grid-template-columns: 1fr; }
  .cmd-cards { grid-template-columns: 1fr 1fr; }
}

/* Điện thoại dọc */
@media (max-width: 560px) {
  :root { --topbar-h: 56px; }
  .topbar { gap: 10px; padding: 0 14px; }
  .brand { font-size: 18px; }
  .brand-dim { display: none; }
  .flow-arrow { display: none; }
  .flow-step { flex-basis: 100%; }
  .mini-cards, .cards-2, .cmd-cards { grid-template-columns: 1fr; }
  .plan-grid { grid-template-columns: 1fr; }
  .benefit-grid, .example-grid, .price-wrap { grid-template-columns: 1fr; }
  .convert-block { flex-direction: column; align-items: flex-start; }
  .price-table { font-size: 13px; }
  .price-table th, .price-table td { padding: 8px 10px; }
  .ge-row { grid-template-columns: 1fr; gap: 8px; }
  .key-row { grid-template-columns: 1fr; }
  .key-row .btn { width: 100%; }
  .support { grid-template-columns: 1fr; text-align: center; }
  .support-qr { order: -1; }

  /* Tabs cuộn ngang thay vì tràn dòng */
  .price-tabs, .os-tabs { display: flex; flex-wrap: nowrap; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: 14px; }
  .ptab, .ostab { white-space: nowrap; flex: 0 0 auto; }

  /* Wizard & code gọn hơn */
  .wizard { padding: 16px; }
  .steps > li { padding-left: 46px; }
  .steps > li::before { width: 32px; height: 32px; font-size: 14px; }
  .steps > li::after { left: 15px; }
  .code { font-size: 12px; }
  .sec h3 { font-size: 16.5px; }
  .to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; }
}


/* ---------- Homepage redesign: live catalog, rate v2, and quick starts ---------- */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.topbar-actions .topbar-cta { margin-left: 0; white-space: nowrap; }

/* Model cards stay horizontal inside a responsive two-column catalog grid. */
.model-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 12px;
}
.model-chip {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 14px;
  background: linear-gradient(145deg, rgba(91,141,255,.09), rgba(21,30,50,.92));
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: 0 10px 28px rgba(0,0,0,.18);
  transition: transform .18s, border-color .18s, box-shadow .18s;
}
.model-chip:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 16px 36px rgba(0,0,0,.28), 0 0 0 1px rgba(91,141,255,.14);
}
.model-chip-loading { grid-template-columns: 48px minmax(0, 1fr); opacity: .8; }
.model-chip-main { display: flex; min-width: 0; flex-direction: column; gap: 4px; }
.model-chip-main strong {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--text);
  font-family: var(--display);
  font-size: 17px;
  line-height: 1.15;
}
.model-id {
  display: block;
  width: 100%;
  padding: 3px 7px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: rgba(91,141,255,.08);
  color: #a9c4ff;
  font: 11.5px/1.45 var(--mono);
  text-align: left;
  overflow-wrap: anywhere;
  cursor: copy;
  transition: color .15s, border-color .15s, background .15s;
}
.model-id::after { content: ' ⧉'; color: var(--muted); }
.model-id:hover { color: var(--cyan); border-color: var(--line-strong); background: rgba(56,232,255,.08); }
.model-id.is-copied { color: #7ff3d9; border-color: rgba(46,230,166,.45); background: rgba(46,230,166,.1); }
.model-id.is-copied::after { content: ''; }
.model-meta { color: var(--muted); font-size: 11.5px; line-height: 1.35; }
.model-brand-logo {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 8px;
  flex: 0 0 46px;
  object-fit: initial;
  border-radius: 13px;
  box-shadow: 0 0 22px rgba(91,141,255,.22), 0 0 0 1px rgba(255,255,255,.1) inset;
}
.model-brand-logo svg { display: block; width: 100%; height: 100%; }
.provider-claude { background: rgba(255,139,102,.1); border-color: rgba(255,139,102,.32); }
.provider-gpt { background: rgba(46,230,166,.09); border-color: rgba(46,230,166,.32); }
.provider-grok { background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.2); }
.provider-glm { background: rgba(91,141,255,.11); border-color: rgba(91,141,255,.36); }
.provider-deepseek { background: rgba(56,232,255,.1); border-color: rgba(56,232,255,.35); }
.status-badge {
  align-self: start;
  justify-self: end;
  padding: 4px 9px;
  border: 1px solid transparent;
  border-radius: 999px;
  font: 700 10.5px/1.25 var(--mono);
  letter-spacing: .03em;
  white-space: nowrap;
}
.st-avail, .st-available { color: #7ff3d9; background: rgba(46,230,166,.12); border-color: rgba(46,230,166,.34); }
.st-vip { color: #ffd98a; background: rgba(255,180,84,.14); border-color: rgba(255,180,84,.42); }
.st-gift { color: #e6b3ff; background: rgba(176,108,255,.14); border-color: rgba(176,108,255,.4); }
.st-media { color: #9fe9ff; background: rgba(56,232,255,.12); border-color: rgba(56,232,255,.38); }
.st-down { color: #ff9a9a; background: rgba(255,107,107,.12); border-color: rgba(255,107,107,.38); }

/* The status strip makes live-versus-fallback provenance visible without blocking the catalog. */
.status-strip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 11px;
  min-height: 48px;
  margin: 18px 0 0;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(21,30,50,.82);
  color: var(--text-2);
}
.status-strip strong { color: var(--text); font-size: 13.5px; }
.status-strip > span:last-child { color: var(--muted); font-size: 12px; }
.status-dot { width: 9px; height: 9px; flex: 0 0 9px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 14px currentColor; }
.status-strip.is-live { border-color: rgba(46,230,166,.34); background: rgba(46,230,166,.07); }
.status-strip.is-live .status-dot { color: var(--green); background: var(--green); }
.status-strip.is-fallback { border-color: rgba(255,180,84,.34); background: rgba(255,180,84,.07); }
.status-strip.is-fallback .status-dot { color: var(--amber); background: var(--amber); }
.status-strip.is-loading .status-dot { color: var(--blue); background: var(--blue); animation: catalog-pulse 1.2s ease-in-out infinite; }
@keyframes catalog-pulse { 0%,100% { opacity: .4; transform: scale(.8); } 50% { opacity: 1; transform: scale(1); } }

/* Pricing panels keep wide tables scrollable on narrow screens instead of overflowing the page. */
.price-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 20px 0 18px;
  padding: 20px 22px;
  border: 1px solid rgba(255,201,90,.54);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(255,224,138,.14), rgba(255,180,84,.04));
  box-shadow: 0 0 0 1px rgba(255,224,138,.12) inset, 0 16px 38px rgba(255,190,60,.12);
}
.price-top-copy { display: flex; min-width: 0; flex-direction: column; gap: 3px; }
.price-top-label { color: #ffd98a; font: 700 11px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.price-ratio {
  color: #fff2c2;
  font-family: var(--hero);
  font-size: clamp(28px, 4.6vw, 44px);
  font-weight: 400;
  line-height: 1.05;
}
.price-top-copy small { color: var(--muted); font-size: 12.5px; }
.price-wrap-live { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.price-panel {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(91,141,255,.06), var(--panel));
}
.price-panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.price-panel-head > div > span { color: var(--cyan); font: 700 10.5px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.price-panel-head h3 { margin: 4px 0 0; font-size: 21px; }
.price-source-note { color: var(--muted); font: 10.5px/1.3 var(--mono); white-space: nowrap; }
.price-table-scroll { width: 100%; overflow-x: auto; border-radius: var(--r); }
/* Desktop pricing tables use fixed columns so both panels fit without internal scrollbars. */
.pricing-section .price-table { min-width: 0; margin: 0; table-layout: fixed; font-size: 12.5px; }
.pricing-section .price-table th, .pricing-section .price-table td { padding: 8px 7px; overflow-wrap: anywhere; }
.pricing-section .price-table th:first-child, .pricing-section .price-table td:first-child { width: 46%; min-width: 0; }
.pricing-section .price-table th.num, .pricing-section .price-table td.num { width: 27%; }
.price-model-name { display: block; color: var(--text); font-weight: 700; }
.pricing-section .price-table td:first-child code { display: inline-block; margin-top: 3px; color: var(--muted); background: transparent; border: 0; padding: 0; font-size: 10.5px; }
.price-footnote { color: var(--muted); font-size: 12.5px; }

/* The quick-start card is the homepage replacement for the removed purchase-plan section. */
.setup-feature-card {
  margin-top: 20px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid rgba(255,201,90,.48);
  border-radius: var(--r-lg);
  background: linear-gradient(145deg, rgba(255,224,138,.1), rgba(21,30,50,.9) 55%, rgba(176,108,255,.08));
  box-shadow: 0 18px 54px rgba(0,0,0,.24), 0 0 0 1px rgba(255,224,138,.1) inset;
}
.setup-feature-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 18px; }
.setup-feature-eyebrow { color: #ffd98a; font: 700 11px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.setup-feature-head h3 { margin: 6px 0 4px; font-size: clamp(21px, 3vw, 29px); }
.setup-feature-head p { margin: 0; color: var(--text-2); font-size: 14px; }
.setup-feature-head .btn { justify-self: end; white-space: nowrap; }
.quick-start-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 11px; margin-top: 22px; }
.quick-start-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  background: rgba(13,19,33,.62);
  color: var(--text);
  transition: transform .18s, border-color .18s, box-shadow .18s;
}
.quick-start-card:hover { color: var(--text); transform: translateY(-2px); border-color: var(--cyan); box-shadow: 0 12px 30px rgba(56,232,255,.14); }
.quick-start-card > span:nth-child(2) { display: flex; min-width: 0; flex-direction: column; }
.quick-start-card strong { font-family: var(--display); font-size: 17px; line-height: 1.1; }
.quick-start-card small { margin-top: 3px; color: var(--muted); font-size: 11.5px; line-height: 1.3; }
.quick-start-card > b { color: var(--cyan); font-size: 20px; }
.quick-start-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; font: 700 21px/1 var(--display); }
.qs-claude .quick-start-icon { color: #ffb08c; background: rgba(255,139,102,.13); border: 1px solid rgba(255,139,102,.35); }
.qs-codex .quick-start-icon { color: #7ff3d9; background: rgba(46,230,166,.13); border: 1px solid rgba(46,230,166,.35); }
.qs-desktop .quick-start-icon { color: #a9c4ff; background: rgba(91,141,255,.13); border: 1px solid rgba(91,141,255,.35); }

@media (max-width: 980px) {
  .topbar-actions { display: none; }
}
@media (max-width: 740px) {
  .model-list { grid-template-columns: 1fr; }
  .price-wrap-live { grid-template-columns: 1fr; }
  .setup-feature-head { grid-template-columns: 1fr; }
  .setup-feature-head .btn { justify-self: start; }
  .quick-start-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .model-chip { grid-template-columns: 46px minmax(0, 1fr); align-items: start; }
  .model-chip .status-badge { grid-column: 2; justify-self: start; }
  .price-top { align-items: flex-start; flex-direction: column; }
  .price-top .btn { width: 100%; }
  .price-panel-head { flex-direction: column; gap: 6px; }
  .price-source-note { white-space: normal; }
  /* Narrow phones keep every rate column accessible through deliberate horizontal scrolling. */
  .pricing-section .price-table { min-width: 520px; table-layout: auto; }
  .pricing-section .price-table th:first-child, .pricing-section .price-table td:first-child { width: auto; min-width: 190px; }
  .pricing-section .price-table th.num, .pricing-section .price-table td.num { width: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ── Redesign 20260719: topbar lớn hơn, nút giữa, khối provider màu ── */
.topbar { height: 72px; padding: 0 clamp(16px, 3vw, 40px); }
.topnav { gap: 4px; }
.topnav a { font-size: 15px; padding: 10px 16px; }
.topbar-cta, .topbar-cta-2 { padding: 11px 20px; font-size: 15px; border-radius: 11px; }
/* Cân chỉnh: brand + nav trái, 2 CTA phải, đều giữa dọc */
.topbar-actions { gap: 12px; }

/* Hero actions / usage gọn: 1 nút giữa, không tách server */
.usage-cta-btns .btn { min-width: 240px; }

/* Catalog: mỗi provider là một khối màu riêng, grid chip trong khối */
.model-list { display: flex; flex-direction: column; gap: 18px; margin: 22px 0 14px; }
.provider-block {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px 18px 18px;
  background: linear-gradient(180deg, rgba(20,31,54,.55), rgba(15,24,42,.35));
  box-shadow: 0 14px 40px rgba(0,0,0,.22);
}
.provider-block-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.provider-block-head .brand-logo { width: 30px; height: 30px; flex: 0 0 30px; }
.provider-block-headtext { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.provider-block-title { font: 700 18px/1.2 var(--display); letter-spacing: .02em; color: var(--text); }
.provider-block-desc { font: 400 13.5px/1.5 var(--sans); color: var(--text-2); max-width: 760px; white-space: pre-line; }
.provider-grid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}
/* Màu viền/khối theo provider */
.provider-claude { border-color: rgba(255,139,102,.35); box-shadow: 0 14px 40px rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,139,102,.08); }
.provider-claude .provider-block-title { color: #ffb08c; }
.provider-gpt { border-color: rgba(46,230,166,.35); box-shadow: 0 14px 40px rgba(0,0,0,.22), inset 0 0 0 1px rgba(46,230,166,.08); }
.provider-gpt .provider-block-title { color: #2ee6a6; }
.provider-glm { border-color: rgba(91,141,255,.35); box-shadow: 0 14px 40px rgba(0,0,0,.22), inset 0 0 0 1px rgba(91,141,255,.08); }
.provider-glm .provider-block-title { color: #8fb4ff; }
.provider-deepseek { border-color: rgba(56,232,255,.35); box-shadow: 0 14px 40px rgba(0,0,0,.22), inset 0 0 0 1px rgba(56,232,255,.08); }
.provider-deepseek .provider-block-title { color: #38e8ff; }
.provider-grok { border-color: rgba(243,247,255,.25); box-shadow: 0 14px 40px rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,255,255,.06); }
.provider-grok .provider-block-title { color: #eef4ff; }

/* Chip gọn: không còn logo riêng (logo ở head khối), 2 cột tên+giá / badge */
.model-chip {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: var(--r);
  background: linear-gradient(180deg, rgba(26,38,61,.5), rgba(16,27,48,.35));
  border: 1px solid var(--line);
  transition: .15s;
}
.model-chip:hover { transform: translateY(-2px); border-color: var(--line-strong); box-shadow: 0 8px 22px rgba(0,0,0,.25); }
.model-chip-main { display: flex; min-width: 0; flex-direction: column; gap: 4px; }
.model-chip-main strong { font-size: 14.5px; color: var(--text); }
.model-id {
  font: 500 11.5px/1.3 var(--mono); color: var(--text-2);
  background: rgba(255,255,255,.04); border: 1px solid var(--line);
  border-radius: 7px; padding: 4px 8px; cursor: pointer; align-self: flex-start;
  max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: .15s;
}
.model-id:hover { color: var(--text); border-color: var(--line-strong); background: rgba(255,255,255,.07); }
.model-price {
  font: 700 13px/1.3 var(--mono); color: #ffd98a; letter-spacing: .01em;
  margin-top: 2px;
}
.model-chip.status-vip .model-price { color: var(--amber); }
.model-chip.status-gift .model-price { color: var(--violet); }
.model-chip.status-media .model-price { color: var(--blue); }

/* Ẩn khối bảng giá cũ (đã gộp vào list) */
.pricing-section[hidden] { display: none; }

/* Nút "Mua ngay" cuối mỗi nhóm — căn giữa, gọn */
.cat-buy-cta {
  display: inline-flex; align-items: center; justify-content: center;
  margin: 16px auto 2px; padding: 11px 26px;
  font-size: 15px; font-weight: 700; border-radius: 11px;
  white-space: nowrap;
}
.provider-block { display: flex; flex-direction: column; align-items: stretch; }
.provider-block .cat-buy-cta { align-self: center; }

/* Setup card gọn (chỉ 1 CTA) */
.setup-feature-head { grid-template-columns: minmax(0, 1fr) auto; gap: 18px; }


/* ===== LUXURY GOLD — nhóm Claude VIP + gói Fable 5 (21/07/2026) =====
   Hướng: dark luxury, vàng champagne kỷ luật — sang nhờ gradient tinh + glow mềm,
   không đổ vàng đặc. Khối VIP nổi hơn mọi nhóm; card VIP/Fable ánh kim nhẹ. */

/* Khối nhóm VIP (Opus VIP + Fable 5 VIP): viền vàng 2 lớp + hào quang ấm + nền ám vàng rất nhạt */
.cat-claude-vip,
.cat-claude-fable-vip {
  border-color: rgba(232, 194, 104, .55);
  background:
    radial-gradient(120% 90% at 50% -10%, rgba(232,194,104,.10), transparent 55%),
    linear-gradient(180deg, rgba(28,25,16,.72), rgba(15,24,42,.42));
  box-shadow:
    0 18px 52px rgba(0,0,0,.30),
    0 0 0 1px rgba(232,194,104,.14),
    0 0 34px rgba(232,194,104,.10),
    inset 0 1px 0 rgba(255,226,150,.18);
}
.cat-claude-vip .provider-block-head,
.cat-claude-fable-vip .provider-block-head { border-bottom-color: rgba(232,194,104,.28); }
.cat-claude-vip .provider-block-title,
.cat-claude-fable-vip .provider-block-title {
  background: linear-gradient(92deg, #f6dc9a 0%, #e8c268 38%, #fff3cf 52%, #d9ab4f 70%, #f2d488 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  letter-spacing: .03em;
  text-shadow: none;
}
.cat-claude-vip .provider-block-desc,
.cat-claude-fable-vip .provider-block-desc { color: #cdbd97; }
.cat-claude-vip .brand-logo svg g,
.cat-claude-vip .brand-logo svg path,
.cat-claude-fable-vip .brand-logo svg g,
.cat-claude-fable-vip .brand-logo svg path { stroke: #e8c268; }
.cat-claude-vip .brand-logo svg circle,
.cat-claude-fable-vip .brand-logo svg circle { fill: #f6dc9a; }

/* Card VIP (mọi model trong nhóm VIP + card nào status-vip): ánh kim + viền vàng */
.model-chip.status-vip {
  border-color: rgba(232,194,104,.45);
  background:
    linear-gradient(115deg, rgba(232,194,104,.10) 0%, rgba(26,38,61,.55) 34%, rgba(16,27,48,.45) 72%, rgba(232,194,104,.07) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,226,150,.16),
    0 6px 18px rgba(0,0,0,.28);
  position: relative;
  overflow: hidden;
}
/* Vệt kim loại quét chéo tĩnh — gợi chất liệu, không animation gây rẻ tiền */
.model-chip.status-vip::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 42%, rgba(255,236,180,.055) 50%, transparent 58%);
}
.model-chip.status-vip:hover {
  border-color: rgba(240,208,126,.72);
  box-shadow:
    inset 0 1px 0 rgba(255,226,150,.22),
    0 10px 26px rgba(0,0,0,.32),
    0 0 22px rgba(232,194,104,.16);
}
.model-chip.status-vip .model-chip-main strong { color: #f6e3b0; letter-spacing: .01em; }
.model-chip.status-vip .model-id {
  color: #d9c48b; border-color: rgba(232,194,104,.35);
  background: rgba(232,194,104,.07);
}
.model-chip.status-vip .model-id:hover { color: #f6e3b0; border-color: rgba(240,208,126,.6); background: rgba(232,194,104,.13); }
.model-chip.status-vip .model-price { color: #ffdf94; text-shadow: 0 0 14px rgba(232,194,104,.35); }
.model-chip.status-vip .st-vip {
  color: #1d1503;
  background: linear-gradient(180deg, #f6dc9a, #d9ab4f);
  border-color: rgba(255,236,180,.85);
  font-weight: 800;
  box-shadow: 0 1px 6px rgba(232,194,104,.4);
}

/* CTA Mua ngay trong 2 nhóm vàng: nút vàng kim thay gradient tím mặc định */
.cat-claude-vip .cat-buy-cta,
.cat-claude-fable-vip .cat-buy-cta {
  background: linear-gradient(180deg, #f2d488 0%, #d9ab4f 100%);
  color: #201703;
  border: 1px solid rgba(255,236,180,.9);
  box-shadow: 0 4px 18px rgba(232,194,104,.35), inset 0 1px 0 rgba(255,246,214,.8);
  text-shadow: none;
}
.cat-claude-vip .cat-buy-cta:hover,
.cat-claude-fable-vip .cat-buy-cta:hover {
  background: linear-gradient(180deg, #f8e0a4 0%, #e2b65e 100%);
  box-shadow: 0 6px 24px rgba(232,194,104,.5), inset 0 1px 0 rgba(255,246,214,.9);
}