/* ============================================================
   Cursor Studio – trang giới thiệu (GitHub Pages)
   ============================================================ */

:root {
  --ink: #f4f2ff;
  --muted: rgba(244, 242, 255, .64);
  --dim: rgba(244, 242, 255, .44);
  --line: rgba(255, 255, 255, .11);
  --card: rgba(255, 255, 255, .055);
  --card-hi: rgba(255, 255, 255, .12);
  --accent: #a78bfa;
  --accent-2: #22d3ee;
  --gold: #fbbf24;
  --good: #34d399;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: #08071a;
  color: var(--ink);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

.glow { position: fixed; border-radius: 50%; filter: blur(100px); pointer-events: none; z-index: 0; }
.glow-a { width: 620px; height: 620px; background: rgba(124, 58, 237, .34); top: -260px; left: -180px; }
.glow-b { width: 560px; height: 560px; background: rgba(14, 116, 144, .30); top: 220px; right: -220px; }

.nav, main, .foot { position: relative; z-index: 2; }

a { color: var(--accent-2); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 12px 24px;
  background: rgba(8, 7, 26, .78);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.logo { display: flex; align-items: center; gap: 9px; text-decoration: none; color: var(--ink); font-size: 15px; }
.logo svg { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 20px; margin-left: 20px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; transition: .15s; }
.nav-links a:hover { color: var(--ink); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lang {
  background: var(--card); border: 1px solid var(--line); color: var(--muted);
  border-radius: 9px; padding: 6px 11px; font-size: 12.5px; cursor: pointer; font-family: inherit;
}
.lang:hover { background: var(--card-hi); color: var(--ink); }

/* ---------- nút ---------- */
.btn {
  display: inline-block; border: 0; border-radius: 11px; padding: 12px 22px;
  cursor: pointer; font-family: inherit; font-size: 14.5px; font-weight: 700;
  text-decoration: none; text-align: center; transition: .16s;
}
.btn-sm { padding: 8px 15px; font-size: 13px; border-radius: 9px; }
.btn-primary {
  color: #150f33; background: linear-gradient(90deg, var(--gold), #fca5a5);
  box-shadow: 0 8px 26px rgba(251, 191, 36, .24);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(251, 191, 36, .34); }
.btn-ghost { color: var(--ink); background: var(--card); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--card-hi); }
.btn-outline { color: var(--ink); background: transparent; border: 1.5px solid var(--accent); }
.btn-outline:hover { background: rgba(167, 139, 250, .16); }

/* ---------- hero ---------- */
main { max-width: var(--max); margin: 0 auto; padding: 0 24px 70px; }

.hero { text-align: center; padding: 74px 0 26px; }
.pill {
  display: inline-block; margin-bottom: 22px; padding: 7px 16px; border-radius: 999px;
  font-size: 13.5px; background: rgba(52, 211, 153, .13);
  border: 1px solid rgba(52, 211, 153, .32); color: #a7f3d0;
}
h1 { font-size: 54px; line-height: 1.1; margin: 0 0 18px; letter-spacing: -1.6px; font-weight: 800; }
.grad {
  background: linear-gradient(100deg, #c4b5fd, #67e8f9 55%, #fbbf24);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { font-size: 17px; color: var(--muted); max-width: 640px; margin: 0 auto 28px; }
.lead b { color: var(--ink); }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.try-hint { font-size: 13px; color: var(--dim); margin-top: 26px; }

/* ---------- playground ---------- */
.playground {
  background: var(--card); border: 1px solid var(--line); border-radius: 20px;
  padding: 18px 22px; display: grid; gap: 13px;
}
.pg-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.pg-label { font-size: 12.5px; color: var(--dim); min-width: 108px; }
.pg-tiles { display: flex; gap: 6px; flex-wrap: wrap; }
.pg-tile {
  min-width: 38px; height: 38px; padding: 6px 10px; border-radius: 10px;
  background: rgba(255, 255, 255, .06); border: 1.5px solid transparent;
  color: var(--ink); font-family: inherit; font-size: 13px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: .14s;
}
.pg-tile svg { width: 22px; height: 22px; }
.pg-tile:hover { background: var(--card-hi); transform: translateY(-2px); }
.pg-tile.on { border-color: var(--gold); background: rgba(251, 191, 36, .16); }

/* ---------- section ---------- */
.section { padding: 56px 0 8px; }
.section h2 { font-size: 29px; margin: 0 0 8px; letter-spacing: -.6px; }
.sub { color: var(--muted); font-size: 14.5px; margin: 0 0 24px; max-width: 720px; }
.note { margin-top: 16px; font-size: 13.5px; color: #fca5a5; }

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(66px, 1fr)); gap: 8px; }
.gitem {
  aspect-ratio: 1; border-radius: 13px; padding: 11px; border: 1px solid var(--line);
  background: var(--card); display: grid; place-items: center; font-size: 23px;
  cursor: pointer; transition: .15s; position: relative;
}
.gitem svg { width: 100%; height: 100%; }
.gitem:hover { transform: translateY(-3px) scale(1.05); background: var(--card-hi); }
.gitem.on { border-color: var(--gold); background: rgba(251, 191, 36, .16); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 13px; }
.feat { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.fi { font-size: 26px; margin-bottom: 8px; }
.feat h3 { margin: 0 0 6px; font-size: 16px; }
.feat p { margin: 0; font-size: 13.5px; color: var(--muted); }

/* ---------- bảng so sánh ---------- */
.table-wrap { overflow-x: auto; }
.compare { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 380px; }
.compare th, .compare td { padding: 12px 16px; text-align: center; border-bottom: 1px solid var(--line); }
.compare th:first-child, .compare td:first-child { text-align: left; color: var(--muted); }
.compare thead th { font-size: 13px; color: var(--dim); font-weight: 600; }
.compare .hl { color: var(--gold); font-weight: 700; }
.compare thead .hl { background: rgba(251, 191, 36, .1); border-radius: 10px 10px 0 0; }
.compare tbody .hl { background: rgba(251, 191, 36, .06); }
.compare .no { color: var(--dim); }

/* ---------- pricing ---------- */
.pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 15px; align-items: start; }
.card { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 24px 21px; }
.card.best {
  border-color: rgba(251, 191, 36, .5);
  background: linear-gradient(160deg, rgba(251, 191, 36, .12), rgba(167, 139, 250, .1));
  box-shadow: 0 16px 44px rgba(0, 0, 0, .36);
}
.ribbon {
  position: absolute; top: -12px; right: 18px; font-size: 11px; font-weight: 800;
  background: linear-gradient(90deg, var(--gold), #f472b6); color: #14102e;
  padding: 4px 11px; border-radius: 999px;
}
.c-name { font-size: 13px; color: var(--muted); }
.c-price { font-size: 40px; font-weight: 800; letter-spacing: -1.4px; line-height: 1.2; }
.c-price small { font-size: 14px; font-weight: 600; color: var(--muted); letter-spacing: 0; }
.c-sub { font-size: 12.5px; color: var(--gold); margin-bottom: 4px; }
.card ul { list-style: none; margin: 16px 0 20px; padding: 0; font-size: 13.5px; line-height: 1.95; }
.card li::before { content: "✓ "; color: var(--good); font-weight: 800; }
.card li.no { opacity: .45; }
.card li.no::before { content: "✕ "; color: #f87171; }
.card .btn { width: 100%; }

/* ---------- các bước ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.num {
  width: 27px; height: 27px; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #14102e; font-weight: 800; font-size: 14px; margin-bottom: 11px;
}
.step h3 { margin: 0 0 8px; font-size: 15.5px; }
.step p, .step li { font-size: 13.5px; color: var(--muted); margin: 0 0 6px; }
.step ol { margin: 0; padding-left: 19px; }
.step ol li { margin-bottom: 5px; }
code {
  background: rgba(0, 0, 0, .35); border: 1px solid var(--line); border-radius: 6px;
  padding: 1px 6px; font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; color: #a5f3fc;
}
code.key { display: block; margin-top: 9px; padding: 9px 11px; word-break: break-all; }

.callout {
  margin-top: 15px; padding: 15px 18px; border-radius: 14px; font-size: 13.8px;
  background: rgba(34, 211, 238, .09); border: 1px solid rgba(34, 211, 238, .28); color: var(--muted);
}
.callout b { color: var(--ink); display: block; margin-bottom: 3px; }

/* ---------- faq ---------- */
.faq { display: grid; gap: 8px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 13px; padding: 14px 18px; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 14.5px; }
.faq summary::marker { color: var(--accent); }
.faq p { margin: 10px 0 0; font-size: 13.8px; color: var(--muted); }

/* ---------- prose (privacy) ---------- */
.prose { max-width: 760px; }
.prose h3 { font-size: 16px; margin: 26px 0 6px; }
.prose p { font-size: 14.2px; color: var(--muted); margin: 0 0 10px; }
.prose b { color: var(--ink); }

/* ---------- footer ---------- */
.foot {
  border-top: 1px solid var(--line); margin-top: 40px; padding: 22px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
  font-size: 13px; color: var(--dim); max-width: var(--max); margin-left: auto; margin-right: auto;
}
.foot-links { display: flex; gap: 16px; }
.foot-links a { color: var(--muted); text-decoration: none; }
.foot-links a:hover { color: var(--ink); }

/* ---------- responsive ---------- */
.touch-only { display: none; }
body.is-touch .desktop-only { display: none; }
body.is-touch .touch-only { display: block; }
body.is-touch #tryHint { display: none; }

@media (max-width: 760px) {
  h1 { font-size: 36px; letter-spacing: -1px; }
  .nav-links { display: none; }
  .section { padding: 42px 0 6px; }
  .pg-label { min-width: 100%; }
}