:root {
  --bg: #0f1117;
  --bg-2: #161923;
  --card: #1a1e2c;
  --border: #2a3040;
  --text: #e7e9ee;
  --muted: #9aa1b1;
  --primary: #5865f2;
  --primary-2: #4752c4;
  --green: #23a55a;
  --red: #f23f43;
  --radius: 16px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--text); text-decoration: none; }
a:hover { opacity: 0.85; }

.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); }

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  text-align: center;
}
.btn:hover { background: var(--primary-2); opacity: 1; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn-lg { padding: 14px 26px; font-size: 16px; border-radius: 12px; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--card); }
.btn-green { background: var(--green); }
.btn-green:hover { background: #1f8b4d; }

.hero {
  padding: 96px 0 80px;
  text-align: center;
  background:
    radial-gradient(800px 400px at 80% -10%, rgba(88, 101, 242, 0.25), transparent 60%),
    radial-gradient(600px 300px at 10% 10%, rgba(35, 165, 90, 0.12), transparent 60%);
}
.hero-badge {
  display: inline-block;
  background: var(--card);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 22px;
}
.hero h1 { font-size: clamp(38px, 6vw, 60px); font-weight: 900; letter-spacing: -0.5px; }
.accent { color: var(--primary); }
.hero-sub { max-width: 620px; margin: 20px auto 32px; color: var(--muted); font-size: 17px; }
.hero-sub code { background: var(--card); border: 1px solid var(--border); padding: 2px 8px; border-radius: 6px; color: var(--text); }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.section { padding: 72px 0; }
.section h2 { font-size: 34px; font-weight: 800; text-align: center; margin-bottom: 10px; }
.section-sub { text-align: center; color: var(--muted); margin-bottom: 36px; }

.converter {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-2);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  padding: 24px;
}
.converter.drag { border-color: var(--primary); background: rgba(88, 101, 242, 0.06); }
.drop-inner { text-align: center; }
.drop-icon { font-size: 44px; margin-bottom: 8px; }
.drop-inner p { color: var(--text); }
.link { color: var(--primary); text-decoration: underline; cursor: pointer; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.converter-stage {
  margin-top: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.preview-wrap { text-align: center; margin-bottom: 18px; }
.preview-wrap img, .preview-wrap video { max-width: 100%; max-height: 360px; border-radius: 10px; border: 1px solid var(--border); }
.row { display: flex; gap: 14px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.field input[type="number"] {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 14px;
  width: 120px;
}
.field-check { flex-direction: row; align-items: center; gap: 8px; color: var(--text); }
.progress { height: 8px; background: var(--card); border-radius: 999px; overflow: hidden; margin: 14px 0; }
.progress-bar { height: 100%; width: 0%; background: var(--primary); transition: width 0.2s; }
.rate-status { font-size: 13px; color: var(--muted); margin-top: 6px; }
.rate-status.limit { color: var(--red); }
.result { margin-top: 18px; text-align: center; }
.result img { max-width: 100%; max-height: 420px; border-radius: 10px; border: 1px solid var(--border); }
.result-actions { display: flex; gap: 14px; justify-content: center; align-items: center; margin-top: 14px; flex-wrap: wrap; }
.rate-limit-note { text-align: center; margin-top: 16px; font-size: 13px; color: var(--muted); }

.bot-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-bottom: 34px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.card-icon { font-size: 30px; margin-bottom: 10px; }
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { color: var(--muted); font-size: 14px; }
.center { text-align: center; }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; text-align: center; }
.stat-num { font-size: 40px; font-weight: 900; color: var(--primary); }
.stat-label { color: var(--muted); font-size: 14px; margin-top: 4px; }

.footer { border-top: 1px solid var(--border); padding: 48px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 24px; margin-bottom: 28px; }
.footer-grid ul { list-style: none; margin-top: 8px; }
.footer-grid li { margin: 4px 0; }
.footer-grid a { color: var(--muted); font-size: 14px; }
.footer-note { color: var(--muted); font-size: 13px; }

.page-wrap { max-width: 780px; margin: 0 auto; padding: 64px 24px 96px; }
.page-wrap h1 { font-size: 36px; margin-bottom: 8px; }
.page-wrap .updated { color: var(--muted); font-size: 13px; margin-bottom: 32px; }
.page-wrap h2 { font-size: 22px; margin: 32px 0 12px; }
.page-wrap p, .page-wrap li { color: var(--muted); font-size: 15px; }
.page-wrap ul, .page-wrap ol { padding-left: 22px; margin: 10px 0; }
.page-wrap .back { color: var(--primary); font-size: 14px; display: inline-block; margin-bottom: 24px; }

.hidden { display: none !important; }

@media (max-width: 640px) {
  .nav-links { gap: 12px; }
  .nav-links a.btn { display: none; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 48px 0; }
}