/* ==========================================================================
   Downlynk — design language
   ========================================================================== */

:root,
html[data-theme='dark'] {
  color-scheme: dark;
  --bg: #0B1220;
  --surface: #121B2E;
  --surface-2: #182338;
  --text: #F4F6FA;
  --muted: #8C99B0;
  --muted-faint: #5c6a82;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.18);
  --coral: #FF4D5E;
  --coral-dim: #C93C49;
  --coral-soft: rgba(255, 77, 94, 0.14);
  --mint: #2BD4A6;
  --mint-dim: #17A480;
  --mint-soft: rgba(43, 212, 166, 0.14);
  --mint-ink: #06231B;
  --amber: #F2B84B;
  --amber-soft: rgba(242, 184, 75, 0.16);
  --danger: #FF6B6B;
  --danger-soft: rgba(255, 107, 107, 0.14);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

html[data-theme='light'] {
  color-scheme: light;
  --bg: #F4F5F2;
  --surface: #FFFFFF;
  --surface-2: #EFF1EE;
  --text: #12151A;
  --muted: #5a6360;
  --muted-faint: #838d89;
  --border: #DCE1DE;
  --border-strong: #C7CDC9;
  --coral: #DE3346;
  --coral-dim: #B72939;
  --coral-soft: rgba(222, 51, 70, 0.1);
  --mint: #12886F;
  --mint-dim: #0C6B57;
  --mint-soft: rgba(18, 136, 111, 0.1);
  --mint-ink: #ffffff;
  --amber: #A6690F;
  --amber-soft: rgba(166, 105, 15, 0.12);
  --danger: #C8392F;
  --danger-soft: rgba(200, 57, 47, 0.1);
  --shadow: 0 20px 45px rgba(20, 24, 26, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1100px 600px at 85% -10%, var(--mint-soft), transparent 60%),
    radial-gradient(900px 500px at -5% 110%, var(--coral-soft), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background 220ms ease, color 220ms ease;
}

.shell { width: min(1180px, 92%); margin-inline: auto; }

h1, h2, .brand, .video-title { font-family: 'Space Grotesk', sans-serif; }
.mono { font-family: 'JetBrains Mono', monospace; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--coral); color: #fff;
  padding: 0.7rem 1rem; border-radius: 0 0 0.5rem 0; z-index: 999;
}
.skip-link:focus { left: 0; }

a { color: inherit; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 1.05rem; }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; text-decoration: none; color: var(--text); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; }

.brand-logo {
  height: 36px; width: auto; flex: 0 0 auto;
  border-radius: 0.6rem; display: block;
}

.brand-word { color: var(--text); }

@media (max-width: 480px) {
  .brand-logo { height: 30px; }
}

.theme-toggle {
  width: 3.4rem; height: 1.85rem; border-radius: 999px;
  border: 1px solid var(--border-strong); background: var(--surface-2);
  position: relative; display: inline-flex; align-items: center; padding: 0 0.4rem;
  cursor: pointer; color: var(--muted); font-size: 0.85rem;
}
.theme-toggle .bi-moon-stars { margin-right: auto; }
.theme-toggle .bi-sun { margin-left: auto; }
.theme-toggle-knob {
  position: absolute; top: 2px; left: 2px; width: 1.55rem; height: 1.55rem;
  border-radius: 50%; background: var(--coral);
  transition: transform 220ms cubic-bezier(.4,0,.2,1);
}
html[data-theme='light'] .theme-toggle-knob { transform: translateX(calc(3.4rem - 1.85rem - 2px)); }

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 4vw, 4rem);
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--mint); font-weight: 600; margin: 0 0 1.1rem;
}
.eyebrow-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--mint);
  box-shadow: 0 0 0 4px var(--mint-soft);
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.1rem); font-weight: 700; line-height: 1.08; letter-spacing: -0.02em;
}
.hero-title .accent { color: var(--coral); }

.hero-subtitle { color: var(--muted); font-size: 1.02rem; max-width: 48ch; margin: 0.9rem 0 1.4rem; }

.platform-strip {
  list-style: none; display: flex; flex-wrap: wrap; gap: 0.5rem; padding: 0; margin: 0 0 1.5rem;
}
.platform-strip li {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.35rem 0.75rem; border-radius: 999px;
  border: 1px solid var(--border); background: rgba(255,255,255,0.02);
  font-size: 0.8rem; color: var(--muted); font-family: 'JetBrains Mono', monospace;
}
.platform-strip i { color: var(--muted-faint); }

/* ---------- Intake (URL bar) ---------- */

.intake {
  display: flex; align-items: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 7px 7px 7px 16px; box-shadow: 0 12px 30px rgba(0,0,0,0.25);
  transition: border-color 180ms ease, background 180ms ease;
}
.intake:focus-within { border-color: color-mix(in srgb, var(--coral) 55%, var(--border)); }
.intake.is-dragover { border-color: var(--coral); background: var(--coral-soft); }

.intake-row { display: flex; align-items: center; gap: 10px; flex: 1; flex-wrap: wrap; }

.intake-dots { display: flex; gap: 5px; margin-right: 2px; }
.intake-dot { width: 7px; height: 7px; border-radius: 50%; }
.intake-dot.r { background: #ff5f57; }
.intake-dot.y { background: #febc2e; }
.intake-dot.g { background: #28c840; }

.intake-input {
  flex: 1 1 220px; min-width: 0; background: transparent; border: none; outline: none;
  color: var(--text); font-family: 'JetBrains Mono', monospace; font-size: 0.92rem; padding: 10px 0;
}
.intake-input::placeholder { color: var(--muted-faint); }

.btn {
  display: inline-flex; align-items: center; gap: 0.45rem;
  border: 1px solid var(--border-strong); background: var(--surface-2); color: var(--text);
  padding: 0.7rem 1rem; border-radius: 10px; font-weight: 600; font-size: 0.9rem;
  cursor: pointer; transition: transform 150ms ease, background 150ms ease, box-shadow 150ms ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-fetch {
  border: none; background: var(--coral); color: #fff;
  box-shadow: 0 8px 18px var(--coral-soft);
}
.btn-fetch:hover { background: var(--coral-dim); }

.drop-hint {
  display: none; align-items: center; gap: 0.4rem; width: 100%;
  margin: 0.3rem 0.2rem 0; font-size: 0.78rem; color: var(--coral); font-family: 'JetBrains Mono', monospace;
}
.intake.is-dragover .drop-hint { display: flex; }

.paste-hint {
  display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--muted); margin-top: 12px;
}
.paste-hint kbd {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px;
  padding: 1px 7px; font-family: 'JetBrains Mono', monospace; font-size: 0.76rem; color: var(--text);
}

.detect-row { margin-top: 1.1rem; min-height: 2rem; }
.detect-badge {
  display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.4rem 0.8rem;
  border-radius: 999px; font-size: 0.82rem; font-family: 'JetBrains Mono', monospace;
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
}
.detect-badge.is-valid { border-color: color-mix(in srgb, var(--mint) 45%, var(--border)); background: var(--mint-soft); color: var(--mint); }
.detect-badge.is-unknown { border-color: color-mix(in srgb, var(--amber) 45%, var(--border)); background: var(--amber-soft); color: var(--amber); }
.detect-badge.is-invalid { border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); background: var(--danger-soft); color: var(--danger); }

.scan-indicator { display: flex; align-items: center; gap: 0.7rem; margin-top: 1rem; color: var(--muted); font-size: 0.88rem; }
.scan-bars { display: inline-flex; align-items: flex-end; gap: 2px; height: 16px; }
.scan-bars span { width: 3px; background: var(--coral); border-radius: 2px; animation: scanBar 900ms ease-in-out infinite; }
.scan-bars span:nth-child(1){height:30%;animation-delay:0ms}
.scan-bars span:nth-child(2){height:60%;animation-delay:80ms}
.scan-bars span:nth-child(3){height:100%;animation-delay:160ms}
.scan-bars span:nth-child(4){height:45%;animation-delay:240ms}
.scan-bars span:nth-child(5){height:80%;animation-delay:320ms}
.scan-bars span:nth-child(6){height:55%;animation-delay:400ms}
.scan-bars span:nth-child(7){height:35%;animation-delay:480ms}
@keyframes scanBar { 0%,100%{transform:scaleY(.4);opacity:.55} 50%{transform:scaleY(1);opacity:1} }

.trust-row {
  list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 1.6rem 0 0;
}
.trust-row li {
  display: inline-flex; align-items: center; gap: 7px; font-size: 0.8rem; color: var(--muted);
  background: rgba(255,255,255,0.02); border: 1px solid var(--border); padding: 7px 13px; border-radius: 100px;
}
.trust-row i { color: var(--mint); font-size: 0.85rem; }

/* ---------- Preview / video card ---------- */

.hero-panel { position: relative; }

.video-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  padding: 16px; box-shadow: var(--shadow);
}
#previewCard.video-card { animation: cardIn 320ms cubic-bezier(.16,1,.3,1); }
@keyframes cardIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

.video-thumb {
  position: relative; border-radius: 13px; overflow: hidden; aspect-ratio: 16/9; background: var(--surface-2);
}
.preview-image { width: 100%; height: 100%; object-fit: cover; display: block; }

.play-btn {
  position: absolute; inset: 0; margin: auto; width: 52px; height: 52px; border-radius: 50%;
  background: rgba(0,0,0,0.35); border: 1px solid rgba(255,255,255,0.3); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem;
  pointer-events: none;
}

.duration-badge {
  position: absolute; bottom: 9px; right: 9px; background: rgba(0,0,0,0.65);
  font-family: 'JetBrains Mono', monospace; font-size: 0.72rem; padding: 3px 8px; border-radius: 6px; color: #fff;
}
.quality-badge {
  position: absolute; top: 9px; left: 9px; background: var(--mint-soft);
  border: 1px solid color-mix(in srgb, var(--mint) 55%, transparent); color: var(--mint);
  font-size: 0.68rem; font-weight: 600; padding: 3px 9px; border-radius: 6px; letter-spacing: 0.03em;
}

.video-meta { display: flex; align-items: center; gap: 10px; margin-top: 14px; }
.channel-avatar {
  width: 34px; height: 34px; border-radius: 50%; flex: 0 0 34px;
  background: linear-gradient(145deg, var(--mint), var(--mint-dim));
  display: flex; align-items: center; justify-content: center; color: var(--mint-ink); font-weight: 700; font-size: 0.85rem;
}
.video-meta-text { min-width: 0; }
.video-title { font-size: 0.92rem; font-weight: 600; line-height: 1.3; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.video-sub { font-size: 0.76rem; color: var(--muted); margin-top: 2px; }

.quality-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.82rem; font-weight: 600; margin: 16px 0 8px; border-top: 1px solid var(--border); padding-top: 14px;
}
.quality-note { font-weight: 400; color: var(--muted-faint); font-size: 0.76rem; font-family: 'JetBrains Mono', monospace; }

.format-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
.format-chip {
  flex: 1 1 auto; min-width: 92px; text-align: center; font-size: 0.76rem; font-family: 'JetBrains Mono', monospace;
  padding: 8px 6px; border-radius: 9px; border: 1px solid var(--border); color: var(--muted);
  cursor: pointer; transition: all 150ms ease; background: transparent;
}
.format-chip:hover { border-color: var(--border-strong); }
.format-chip.active { background: var(--coral-soft); border-color: color-mix(in srgb, var(--coral) 55%, var(--border)); color: var(--text); }
.format-chip strong { display: block; font-family: 'Inter', sans-serif; font-weight: 600; font-size: 0.82rem; margin-bottom: 1px; }

.download-block { margin-top: 2px; }

.meter { height: 0.45rem; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; }
.meter-fill { height: 100%; background: linear-gradient(90deg, var(--coral), var(--mint)); transition: width 320ms ease; }
.meter-text { margin: 0.45rem 0 0.9rem; font-size: 0.78rem; color: var(--muted-faint); font-family: 'JetBrains Mono', monospace; }

.btn-download {
  width: 100%; background: var(--mint); border: none; color: var(--mint-ink);
  font-weight: 700; font-size: 1rem; padding: 15px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  box-shadow: 0 12px 26px var(--mint-soft); cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}
.btn-download:hover { transform: translateY(-2px); background: var(--mint-dim); }
.btn-download:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.secure-line { text-align: center; font-size: 0.72rem; color: var(--muted-faint); margin: 10px 0 0; }

/* ---------- Empty state ---------- */

.preview-empty {
  text-align: center; color: var(--muted-faint); position: relative; overflow: hidden;
  min-height: 340px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1rem;
}
.preview-empty i { font-size: 1.8rem; }
.preview-empty p { max-width: 26ch; margin: 0; font-size: 0.92rem; }

.empty-rings { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.empty-rings span { position: absolute; border: 1px solid var(--border); border-radius: 50%; animation: ringGrow 3.6s ease-out infinite; }
.empty-rings span:nth-child(1) { animation-delay: 0s; }
.empty-rings span:nth-child(2) { animation-delay: 1.2s; }
.empty-rings span:nth-child(3) { animation-delay: 2.4s; }
@keyframes ringGrow { 0%{width:60px;height:60px;opacity:.6} 100%{width:340px;height:340px;opacity:0} }

/* ---------- Footer ---------- */

.footer-strip { border-top: 1px solid var(--border); padding-block: 1.4rem; }
.footer-inner {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.6rem;
  font-size: 0.78rem; color: var(--muted-faint);
}
.footer-inner nav a { color: var(--muted-faint); margin-left: 16px; text-decoration: none; }
.footer-inner nav a:hover { color: var(--muted); }
.footer-brand { font-family: 'Space Grotesk', sans-serif; font-weight: 700; color: var(--text); }

/* ---------- Toasts ---------- */

.toast-container { position: fixed; top: 1.2rem; right: 1.2rem; z-index: 200; display: flex; flex-direction: column; gap: 0.6rem; max-width: min(360px, calc(100vw - 2.4rem)); }
.toast {
  display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.85rem 1rem; border-radius: 0.85rem;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
  font-size: 0.88rem; color: var(--text); transform: translateX(120%); opacity: 0;
  transition: transform 260ms cubic-bezier(.16,1,.3,1), opacity 260ms ease;
}
.toast.is-visible { transform: translateX(0); opacity: 1; }
.toast.toast-success i { color: var(--mint); }
.toast.toast-error i { color: var(--danger); }
.toast.toast-info i { color: var(--coral); }

/* ---------- Utility ---------- */
.d-none { display: none !important; }

/* ---------- Responsive ---------- */

@media (max-width: 900px) { .hero { grid-template-columns: 1fr; } }
@media (max-width: 560px) {
  .intake-row { flex-direction: column; align-items: stretch; }
  .intake-dots { display: none; }
  .btn { justify-content: center; }
  .footer-inner { flex-direction: column; }
  .footer-inner nav a:first-child { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}