/* =====================================================
   Reels Mode — Fullscreen vertical video feed (Phase 2.5)
   ===================================================== */

/* When viewing reels, we want a fully immersive dark canvas.
   The body uses a fixed dark background so the snap-scroll feels
   like a native app, with no white flashes between reels. */
.reels-body {
  background: #000;
  color: #fff;
  overflow: hidden; /* the feed handles its own scroll */
  height: 100vh;
  height: 100dvh; /* dynamic viewport height — handles mobile URL bar */
  position: fixed;
  inset: 0;
  touch-action: pan-y; /* allow vertical pan for snap-scroll */
}

/* The feed is a vertical snap container — one reel per "screen" */
.reels-feed {
  height: 100vh;
  height: 100dvh;
  width: 100vw;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  background: #000;
  position: relative;
}
.reels-feed::-webkit-scrollbar {
  display: none;
}

/* Each reel takes exactly one viewport */
.reel {
  position: relative;
  height: 100vh;
  height: 100dvh;
  width: 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  background: #000;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* The video wrapper holds the actual <video> element.
   We use object-fit: cover to fill the whole screen,
   cropping if necessary (matches Instagram/TikTok behavior). */
.reel-video-wrap {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}
.reel-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  background: #000;
}

/* Loading spinner overlay (visible while video buffers) */
.reel-loading-spinner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.4);
  z-index: 5;
  pointer-events: none;
}
.reel-loading-spinner .spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: video-spin 0.7s linear infinite;
}

/* Tap target (transparent overlay capturing taps) */
.reel-tap-target {
  position: absolute;
  inset: 0;
  z-index: 10;
  cursor: pointer;
}
/* Big center play icon when paused */
.reel-play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: opacity 0.2s, transform 0.2s;
}
.reel-play-icon svg {
  width: 36px;
  height: 36px;
  color: #fff;
  margin-left: 4px; /* visual nudge to center the triangle */
}
.reel-tap-target.hidden .reel-play-icon {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.8);
  pointer-events: none;
}
.reel.has-played .reel-play-icon {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.8);
  pointer-events: none;
}

/* Double-tap like burst animation */
.reel-like-burst {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 140px;
  height: 140px;
  color: var(--brand-3);
  z-index: 15;
  pointer-events: none;
  opacity: 0;
  filter: drop-shadow(0 4px 24px rgba(236, 72, 153, 0.6));
}
.reel-like-burst.animate {
  animation: reel-like-burst 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes reel-like-burst {
  0%   { transform: translate(-50%, -50%) scale(0); opacity: 0; }
  15%  { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
  30%  { transform: translate(-50%, -50%) scale(0.95); opacity: 1; }
  45%  { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(1.4); opacity: 0; }
}

/* Progress bar (top of each reel) */
.reel-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  z-index: 20;
  cursor: pointer;
}
.reel-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--brand-1), var(--brand-3));
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* Bottom-left overlay (title, author, description) */
.reel-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 80px 16px 90px;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.85) 0%,
    rgba(0, 0, 0, 0.5) 60%,
    transparent 100%
  );
  z-index: 12;
  pointer-events: none;
}
.reel-overlay a,
.reel-overlay button {
  pointer-events: auto;
}
.reel-info {
  max-width: 78%; /* leave room for the side action rail on the right (LTR) / left (RTL) */
  display: flex;
  flex-direction: column;
  gap: 6px;
}
[dir="rtl"] .reel-info {
  margin-right: 0;
  margin-left: auto;
}

.reel-meta-top {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.7rem;
}
.reel-source-pill,
.reel-license-pill {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.7rem;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.reel-source-pill {
  background: rgba(99, 102, 241, 0.35);
  border-color: rgba(99, 102, 241, 0.6);
}
.reel-duration {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  background: rgba(0, 0, 0, 0.55);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  color: #fff;
}

.reel-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}
.reel-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.75rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  flex-shrink: 0;
}
.reel-author-name {
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}
.reel-author-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s;
}
.reel-author-link:hover {
  background: rgba(255, 255, 255, 0.32);
}

.reel-h2 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.7);
  margin-top: 4px;
  /* Clamp to 2 lines */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.reel-desc {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.45;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
  /* Clamp to 3 lines */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.reel-actions-bottom {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.reel-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background 0.2s, transform 0.2s;
}
.reel-link-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}
.reel-link-btn svg {
  width: 14px;
  height: 14px;
}

/* Right-side action rail (like, mute, share, loop) */
.reel-actions {
  position: absolute;
  bottom: 110px; /* sit above the bottom nav */
  right: 8px;
  [dir="rtl"] & {
    right: auto;
    left: 8px;
  }
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 14;
  align-items: center;
}
.reel-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: transparent;
  color: #fff;
  padding: 6px;
  cursor: pointer;
  border-radius: 50%;
  transition: transform 0.15s, color 0.15s;
  position: relative;
}
.reel-action-btn svg {
  width: 28px;
  height: 28px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 50%;
  padding: 6px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.2s;
}
.reel-action-btn:hover svg {
  background: rgba(0, 0, 0, 0.6);
  transform: scale(1.08);
}
.reel-action-btn:active svg {
  transform: scale(0.92);
}
.reel-action-label {
  font-size: 0.65rem;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.7);
}
/* Like button states */
.reel-action-btn.liked svg {
  color: var(--brand-3);
  background: rgba(236, 72, 153, 0.18);
  border-color: rgba(236, 72, 153, 0.4);
  animation: reel-like-pop 0.4s ease;
}
@keyframes reel-like-pop {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.3); }
  60%  { transform: scale(0.9); }
  100% { transform: scale(1); }
}
.reel-action-btn.active svg {
  color: var(--brand-1);
  background: rgba(99, 102, 241, 0.2);
  border-color: rgba(99, 102, 241, 0.5);
}

/* Top bar (back button + title + theme toggle) */
.reels-topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  padding-top: env(safe-area-inset-top, 0);
  z-index: 30;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.55) 0%,
    transparent 100%
  );
  pointer-events: none;
}
.reels-topbar > * {
  pointer-events: auto;
}
.reels-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 50%;
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: background 0.2s;
}
.reels-back:hover {
  background: rgba(0, 0, 0, 0.6);
}
.reels-back svg {
  width: 20px;
  height: 20px;
}
[dir="rtl"] .reels-back svg {
  transform: scaleX(-1);
}
.reels-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
}
.reels-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 50%;
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.reels-theme-toggle svg {
  width: 18px;
  height: 18px;
}
.reels-theme-toggle .sun { display: none; }
.reels-theme-toggle .moon { display: block; }
[data-theme="dark"] .reels-theme-toggle .sun { display: block; }
[data-theme="dark"] .reels-theme-toggle .moon { display: none; }

/* Bottom navigation — adjusted for reels (transparent dark background) */
.reels-bottom-nav {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.85) 0%,
    rgba(0, 0, 0, 0.5) 70%,
    transparent 100%
  );
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  border-top: none;
  z-index: 25;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.reels-bottom-nav .bottom-nav-item {
  color: rgba(255, 255, 255, 0.7);
}
.reels-bottom-nav .bottom-nav-item.active {
  color: #fff;
}
.reels-bottom-nav .bottom-nav-item svg {
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.6));
}

/* Loading + empty states */
.reels-loading,
.reels-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: rgba(255, 255, 255, 0.7);
  z-index: 5;
}
.reels-empty svg {
  width: 64px;
  height: 64px;
  opacity: 0.5;
}
.reels-empty h2 {
  color: #fff;
  font-size: 1.2rem;
}
.reels-empty p {
  color: rgba(255, 255, 255, 0.6);
}
.reels-loading .spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.15);
  border-top-color: #fff;
  border-radius: 50%;
  animation: video-spin 0.7s linear infinite;
}

/* ---------- Responsive tweaks ---------- */
@media (min-width: 768px) {
  /* On tablet/desktop, constrain the feed to a phone-like aspect ratio
     in the center of the screen — gives a more app-like feel. */
  .reels-feed {
    max-width: 480px;
    margin: 0 auto;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
  }
  .reels-topbar,
  .reels-bottom-nav {
    max-width: 480px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
  }
  .reel-info {
    max-width: 75%;
  }
}

/* On very small phones, slightly reduce overlay padding so text doesn't dominate */
@media (max-width: 360px) {
  .reel-overlay {
    padding: 70px 12px 80px;
  }
  .reel-h2 {
    font-size: 0.88rem;
  }
  .reel-desc {
    font-size: 0.72rem;
  }
  .reel-action-btn svg {
    width: 26px;
    height: 26px;
  }
  .reel-action-label {
    display: none; /* hide labels on tiny screens */
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .reel-like-burst.animate {
    animation-duration: 0.01s;
  }
  .reels-feed {
    scroll-behavior: auto;
  }
}