/* VGen — Premium dark theme. Linear/Vercel-inspired. */
:root {
  --bg: #0a0a0f;
  --bg-soft: #0e0e16;
  --card: #12121b;
  --card-hover: #16161f;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #f4f4f6;
  --muted: #a2a2b0;
  --faint: #9c9cae;
  --violet: #8b5cf6;
  --indigo: #6366f1;
  --cyan: #22d3ee;
  --gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 48%, #22d3ee 100%);
  --gradient-soft: linear-gradient(135deg, rgba(139,92,246,.16), rgba(34,211,238,.10));
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-glow: 0 0 32px rgba(139, 92, 246, 0.28);
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient background glows */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(640px 420px at 12% -4%, rgba(139, 92, 246, 0.14), transparent 60%),
    radial-gradient(720px 460px at 88% 8%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(900px 600px at 50% 110%, rgba(99, 102, 241, 0.08), transparent 60%);
  pointer-events: none;
}

::selection { background: rgba(139, 92, 246, 0.45); color: #fff; }

a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(10, 10, 15, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px; background: var(--gradient);
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 1rem;
  box-shadow: 0 4px 18px rgba(139, 92, 246, 0.45);
}
.logo span.grad { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-size: 0.92rem; color: var(--muted);
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav-links a.active { color: var(--text); background: rgba(139,92,246,.14); }
.nav-cta {
  background: var(--gradient); color: #fff !important; font-weight: 600;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35);
}
.nav-cta:hover { box-shadow: 0 6px 28px rgba(139, 92, 246, 0.55); background: var(--gradient); }
.menu-btn { display: none; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px 12px; cursor: pointer; font-size: 1.1rem; }

/* ---------- Hero ---------- */
.hero { padding: 148px 0 72px; text-align: center; position: relative; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border-strong); border-radius: 999px;
  padding: 7px 16px; font-size: 0.82rem; color: var(--muted);
  background: rgba(255,255,255,.03); margin-bottom: 28px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.4rem, 5.4vw, 4rem); line-height: 1.08; letter-spacing: -0.03em;
  max-width: 820px; margin: 0 auto 20px;
}
.grad-text { background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.sub { color: var(--muted); font-size: 1.12rem; max-width: 620px; margin: 0 auto 36px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 12px; font-weight: 600; font-size: 0.98rem;
  border: 1px solid transparent; cursor: pointer; transition: transform .18s, box-shadow .25s, background .2s;
  font-family: var(--font-body);
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 6px 26px rgba(139,92,246,.38); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 36px rgba(139,92,246,.55); }
.btn-ghost { background: rgba(255,255,255,.04); border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { background: rgba(255,255,255,.08); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 0.86rem; border-radius: 9px; }

/* ---------- Sections ---------- */
.section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head h2 { font-family: var(--font-display); font-size: clamp(1.7rem, 3.4vw, 2.4rem); letter-spacing: -0.02em; margin-bottom: 12px; }
.section-head p { color: var(--muted); max-width: 600px; margin: 0 auto; }

/* ---------- Tool cards ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.tool-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 28px; position: relative; overflow: hidden;
  transition: transform .22s, border-color .25s, box-shadow .25s, background .25s;
}
.tool-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--gradient); opacity: 0; transition: opacity .25s;
}
.tool-card:hover { transform: translateY(-5px); border-color: rgba(139,92,246,.45); box-shadow: 0 18px 48px rgba(0,0,0,.45), 0 0 28px rgba(139,92,246,.14); background: var(--card-hover); }
.tool-card:hover::before { opacity: 1; }
.tool-icon {
  width: 48px; height: 48px; border-radius: 13px; margin-bottom: 18px;
  display: grid; place-items: center; background: var(--gradient-soft);
  border: 1px solid rgba(139,92,246,.3); color: var(--cyan);
}
.tool-icon svg { width: 24px; height: 24px; }
.tool-card h3 { font-family: var(--font-display); font-size: 1.18rem; margin-bottom: 8px; letter-spacing: -0.01em; }
.tool-card p { color: var(--muted); font-size: 0.93rem; margin-bottom: 18px; }
.tool-card .go { font-size: 0.9rem; font-weight: 600; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- Feature rows ---------- */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.feature { padding: 26px; border: 1px solid var(--border); border-radius: var(--radius); background: rgba(255,255,255,.015); }
.feature h3 { font-size: 1.02rem; margin-bottom: 8px; font-family: var(--font-display); }
.feature p { color: var(--muted); font-size: 0.92rem; }

/* ---------- Tool page layout ---------- */
.tool-hero { padding: 132px 0 40px; text-align: center; }
.tool-hero h1 { font-family: var(--font-display); font-size: clamp(1.9rem, 4vw, 2.8rem); letter-spacing: -0.02em; margin-bottom: 12px; }
.tool-hero p { color: var(--muted); max-width: 640px; margin: 0 auto; }

.tool-shell {
  background: var(--card); border: 1px solid var(--border); border-radius: 20px;
  padding: clamp(24px, 4vw, 44px); margin-bottom: 56px;
  box-shadow: 0 24px 70px rgba(0,0,0,.4);
  position: relative; overflow: hidden;
}
.tool-shell::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--gradient); opacity: .8;
}

.form-grid { display: grid; gap: 20px; margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
label { display: block; font-size: 0.86rem; font-weight: 600; color: var(--muted); margin-bottom: 8px; letter-spacing: .02em; text-transform: uppercase; }
input[type="text"], textarea, select {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); color: var(--text); padding: 13px 15px;
  font-size: 0.98rem; font-family: var(--font-body); outline: none;
  transition: border-color .2s, box-shadow .2s;
}
input[type="text"]:focus, textarea:focus, select:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(139,92,246,.18); }
textarea { min-height: 110px; resize: vertical; }
select option { background: var(--bg-soft); }
.hint { font-size: 0.82rem; color: var(--faint); margin-top: 6px; }

/* segmented control */
.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.seg button {
  flex: 1 1 auto; padding: 12px 10px; border-radius: var(--radius-sm); cursor: pointer;
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--muted);
  font-family: var(--font-body); font-size: 0.92rem; font-weight: 600; transition: all .2s;
}
.seg button.on { background: var(--gradient-soft); border-color: var(--violet); color: var(--text); box-shadow: 0 0 18px rgba(139,92,246,.22); }

.results { display: none; margin-top: 34px; }
.results.show { display: block; animation: fadeUp .45s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.results-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 12px; }
.results-head h2 { font-family: var(--font-display); font-size: 1.25rem; }

.result-item {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 16px 18px; margin-bottom: 12px; display: flex; gap: 14px; align-items: flex-start;
  transition: border-color .2s;
}
.result-item:hover { border-color: rgba(139,92,246,.4); }
.result-num {
  flex: 0 0 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--gradient); color: #fff; font-weight: 700; font-size: 0.82rem;
}
.result-text { flex: 1; font-size: 0.98rem; }
.result-text .tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--cyan); margin-bottom: 4px; }
.copy-btn {
  flex: 0 0 auto; background: rgba(255,255,255,.05); border: 1px solid var(--border);
  color: var(--muted); border-radius: 8px; padding: 8px 13px; font-size: 0.8rem; font-weight: 600;
  cursor: pointer; transition: all .2s; font-family: var(--font-body); white-space: nowrap;
}
.copy-btn:hover { color: var(--text); border-color: var(--violet); background: rgba(139,92,246,.12); }
.copy-btn.copied { color: #4ade80; border-color: rgba(74,222,128,.5); }

.script-block { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 20px 22px; margin-bottom: 14px; }
.script-block h4 { font-family: var(--font-display); font-size: 0.95rem; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.script-block h4 .pill { font-size: 0.7rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; padding: 3px 10px; border-radius: 999px; background: var(--gradient); color: #fff; }
.script-block p { color: var(--muted); font-size: 0.95rem; }
.script-block .copy-btn { margin-top: 10px; }

.hgroup { margin-bottom: 22px; }
.hgroup h3 { font-family: var(--font-display); font-size: 1rem; margin-bottom: 10px; color: var(--cyan); }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 12px; background: var(--card); overflow: hidden; }
.faq-q { width: 100%; background: none; border: none; color: var(--text); text-align: left; padding: 18px 20px; font-size: 1rem; font-weight: 600; font-family: var(--font-body); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-q .chev { transition: transform .25s; color: var(--violet); font-size: 1.2rem; }
.faq-item.open .faq-q .chev { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a p { padding: 0 20px 20px; color: var(--muted); font-size: 0.94rem; }

/* ---------- Content pages ---------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { font-family: var(--font-display); font-size: 1.5rem; margin: 36px 0 14px; letter-spacing: -0.01em; }
.prose p { color: var(--muted); margin-bottom: 16px; }
.prose ul { color: var(--muted); margin: 0 0 16px 22px; }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--text); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 56px 0 32px; background: rgba(255,255,255,.012); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
.foot-grid .foot-title { font-size: 0.85rem; text-transform: uppercase; letter-spacing: .08em; color: var(--faint); margin-bottom: 14px; font-weight: 600; }
.foot-grid a { display: block; color: var(--muted); font-size: 0.92rem; margin-bottom: 9px; transition: color .2s; }
.foot-grid a:hover { color: var(--text); }
.foot-brand p { color: var(--muted); font-size: 0.92rem; margin-top: 12px; max-width: 280px; }
.foot-bottom { border-top: 1px solid var(--border); padding-top: 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--faint); font-size: 0.85rem; }

/* ---------- Misc ---------- */
.crumbs { font-size: 0.85rem; color: var(--faint); margin-bottom: 18px; }
.crumbs a { color: var(--muted); } .crumbs a:hover { color: var(--text); }
.badge-row { display: flex; gap: 10px; flex-wrap: wrap; margin: 26px 0 8px; }
.stat { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 18px; font-size: 0.85rem; color: var(--muted); background: rgba(255,255,255,.02); }
.stat b { color: var(--text); font-family: var(--font-display); }

.howto { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 40px; }
.howto .step { border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; background: rgba(255,255,255,.015); }
.howto .n { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
.howto h3 { font-size: 1rem; margin: 10px 0 6px; font-family: var(--font-display); }
.howto p { color: var(--muted); font-size: 0.9rem; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: #0d0d14; border-bottom: 1px solid var(--border); flex-direction: column; align-items: stretch; padding: 12px 20px 18px; gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; }
  .menu-btn { display: block; }
  .form-row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 120px 0 56px; }
  .result-item { flex-wrap: wrap; }
}
@media (max-width: 520px) {
  .foot-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}