/* ============================================================
   Shared video showcase component.
   Works on index / blitz / closecrab — inherits each page's
   own custom properties, so it never hardcodes a palette.
   Sources supported, in fallback order:
     data-yt   → YouTube  (global, adaptive bitrate)
     data-bili → Bilibili (mainland China)
     data-src  → self-hosted mp4 (small clips only)
   ============================================================ */

.vshow { position: relative; padding: 5.5rem 0; }

.vshow-head {
  max-width: 760px;
  margin: 0 auto 2.75rem;
  text-align: center;
}

.vshow-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono, ui-monospace, Consolas, monospace);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted, #7a6f9c);
  padding: 0.34rem 0.8rem;
  border: 1px solid var(--border, rgba(140, 140, 180, 0.2));
  border-radius: 999px;
  margin-bottom: 1.1rem;
}

.vshow-eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan, #06d6a0);
  box-shadow: 0 0 10px var(--cyan, #06d6a0);
}

.vshow-head h2 {
  font-family: var(--font-display, sans-serif);
  font-size: clamp(1.85rem, 4vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
  color: var(--text, #f3f0ff);
}

.vshow-head h2 em {
  font-style: normal;
  background: linear-gradient(
    100deg,
    var(--purple-light, #a78bfa),
    var(--cyan, #06d6a0)
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.vshow-head p {
  color: var(--text-dim, #b8aed8);
  font-size: 1.03rem;
  line-height: 1.7;
  margin: 0;
}

/* ---- frame ---- */

.vframe {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
  border-radius: 16px;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border, rgba(140, 140, 180, 0.2));
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.9);
  aspect-ratio: 16 / 9;
}

.vframe.is-portrait { max-width: 420px; aspect-ratio: 9 / 16; }

.vframe iframe,
.vframe video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  object-fit: cover;
  background: #000;
}

/* ---- click-to-load poster ---- */

.vframe-poster {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  cursor: pointer;
  border: 0;
  width: 100%;
  background:
    radial-gradient(circle at 50% 45%, rgba(139, 92, 246, 0.14), transparent 60%),
    var(--bg-2, #070218);
  transition: opacity 0.35s ease;
}

.vframe-poster[hidden] { display: none; }

.vframe-poster img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.vframe-play {
  position: relative;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(10, 6, 24, 0.72);
  border: 1px solid var(--border-strong, rgba(160, 160, 220, 0.45));
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.vframe-play::after {
  content: "";
  width: 0;
  height: 0;
  margin-left: 5px;
  border-left: 19px solid var(--text, #fff);
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
}

.vframe-poster:hover .vframe-play,
.vframe-poster:focus-visible .vframe-play {
  transform: scale(1.08);
  box-shadow: 0 0 0 8px rgba(139, 92, 246, 0.14);
}

.vframe-poster:focus-visible {
  outline: 2px solid var(--cyan, #06d6a0);
  outline-offset: -4px;
}

.vframe-label {
  position: relative;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim, #b8aed8);
}

/* ---- source switch (YouTube / Bilibili) ---- */

.vsrc {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin: 1.25rem auto 0;
  flex-wrap: wrap;
}

.vsrc-btn {
  font-family: var(--font-mono, monospace);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 0.44rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
  color: var(--text-muted, #7a6f9c);
  background: transparent;
  border: 1px solid var(--border, rgba(140, 140, 180, 0.2));
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.vsrc-btn:hover { color: var(--text, #fff); border-color: var(--border-strong, rgba(160, 160, 220, 0.45)); }

.vsrc-btn[aria-pressed="true"] {
  color: var(--text, #fff);
  border-color: var(--cyan, #06d6a0);
  background: rgba(6, 214, 160, 0.1);
}

/* ---- caption strip ---- */

.vnote {
  max-width: 1080px;
  margin: 1.5rem auto 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
}

.vnote-item {
  padding: 1rem 1.15rem;
  border-radius: 12px;
  background: var(--card, rgba(14, 6, 32, 0.6));
  border: 1px solid var(--border-faint, rgba(140, 140, 180, 0.1));
}

.vnote-item strong {
  display: block;
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan, #06d6a0);
  margin-bottom: 0.4rem;
}

.vnote-item span {
  color: var(--text-dim, #b8aed8);
  font-size: 0.88rem;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .vshow { padding: 3.5rem 0; }
  .vframe { border-radius: 12px; }
  .vframe-play { width: 60px; height: 60px; }
  .vframe-play::after { border-left-width: 15px; border-top-width: 10px; border-bottom-width: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .vframe-poster, .vframe-play, .vsrc-btn { transition: none; }
}