/* ============================================
   TECH ENHANCEMENTS — Extra sci-fi layer
   ============================================ */

/* Logo SVG sizing */
.logo-svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  transition: filter 0.3s ease;
}
.nav-logo:hover .logo-svg {
  filter: drop-shadow(0 0 8px rgba(0,212,255,0.8));
}

/* ── Matrix Canvas ── */
#matrix {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 1;
}

/* ── Scan-line sweep on hero ── */
.hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(0,212,255,0.6) 50%, transparent 100%);
  animation: scanSweep 6s linear infinite;
  pointer-events: none;
  z-index: 2;
}
@keyframes scanSweep {
  0%   { top: 0%;   opacity: 0; }
  5%   { opacity: 1; }
  95%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* ── Hexagonal grid on section-dark ── */
.section-dark {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='104'%3E%3Cpolygon points='30,2 58,17 58,47 30,62 2,47 2,17' fill='none' stroke='rgba(0,212,255,0.05)' stroke-width='1'/%3E%3Cpolygon points='30,54 58,69 58,99 30,114 2,99 2,69' fill='none' stroke='rgba(0,212,255,0.05)' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 60px 104px;
}
[data-theme="light"] .section-dark {
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='104'%3E%3Cpolygon points='30,2 58,17 58,47 30,62 2,47 2,17' fill='none' stroke='rgba(0,100,180,0.07)' stroke-width='1'/%3E%3Cpolygon points='30,54 58,69 58,99 30,114 2,99 2,69' fill='none' stroke='rgba(0,100,180,0.07)' stroke-width='1'/%3E%3C/svg%3E");
}

/* ── 3D card tilt (applied via JS) ── */
.post-card, .gallery-item, .skill-card {
  transform-style: preserve-3d;
  will-change: transform;
}
.post-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(0,212,255,0.06) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.post-card:hover::after { opacity: 1; }

/* ── Holographic shimmer on card hover ── */
@keyframes holoShimmer {
  0%   { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.post-card:hover {
  background: linear-gradient(
    135deg,
    var(--bg-card) 0%,
    rgba(0,212,255,0.04) 30%,
    var(--bg-card) 60%,
    rgba(124,58,237,0.04) 80%,
    var(--bg-card) 100%
  );
}

/* ── Neon text on hero name ── */
.title-name {
  text-shadow: 0 0 40px rgba(0,212,255,0.3), 0 0 80px rgba(124,58,237,0.2);
}

/* ── Corner bracket decorations on hero ── */
.hero-content::before,
.hero-content::after {
  content: '';
  position: absolute;
  width: 40px;
  height: 40px;
  border-color: rgba(0,212,255,0.35);
  border-style: solid;
  pointer-events: none;
}
.hero-content {
  position: relative;
}
.hero-content::before {
  top: -20px; left: -20px;
  border-width: 2px 0 0 2px;
}
.hero-content::after {
  bottom: -20px; right: -20px;
  border-width: 0 2px 2px 0;
}

/* ── Typing cursor for subtitle ── */
.hero-subtitle::after {
  content: '|';
  color: var(--accent);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* ── Section tag: circuit-board look ── */
.section-tag {
  position: relative;
}
.section-tag::before,
.section-tag::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 20px;
  height: 1px;
  background: var(--accent);
  opacity: 0.4;
}
.section-tag::before { right: calc(100% + 8px); }
.section-tag::after  { left:  calc(100% + 8px); }

/* ── Animated border on nav (tech feel) ── */
.nav::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent) 30%,
    var(--accent2) 70%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: navLine 4s linear infinite;
}
@keyframes navLine {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ── Data-stream decoration (vertical lines left/right of page) ── */
.data-stream {
  position: fixed;
  top: 0;
  width: 1px;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.data-stream-left  { left: 20px; }
.data-stream-right { right: 20px; }
.data-stream::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--accent), transparent);
  animation: streamFlow 3s linear infinite;
}
.data-stream-right::after {
  animation-delay: 1.5s;
  background: linear-gradient(to bottom, transparent, var(--accent2), transparent);
}
@keyframes streamFlow {
  0%   { top: -10%; }
  100% { top: 110%; }
}

/* ── Glitch on logo hover ── */
.nav-logo:hover .logo-text {
  animation: textGlitch 0.3s steps(2) forwards;
}
@keyframes textGlitch {
  0%   { transform: translate(0); clip-path: none; }
  25%  { transform: translate(-2px, 1px); clip-path: polygon(0 20%, 100% 20%, 100% 50%, 0 50%); }
  50%  { transform: translate(2px,-1px); clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%); }
  100% { transform: translate(0); clip-path: none; }
}

/* ── Video card in gallery ── */
.video-card {
  aspect-ratio: 16/9;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  position: relative;
  cursor: pointer;
  transition: all var(--transition);
  grid-column: span 2;
}
@media (max-width: 600px) { .video-card { grid-column: span 1; } }

.video-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

.video-card iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.video-platform-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.05em;
  pointer-events: none;
  z-index: 2;
}
.badge-youtube  { background: #ff0000; color: #fff; }
.badge-bilibili { background: #00a1d6; color: #fff; }

/* ── Admin: video add form ── */
.video-add-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}
.video-add-form .form-row { align-items: flex-end; }

/* ── Page-header glow intensified ── */
.page-header-bg {
  background:
    radial-gradient(ellipse 60% 100% at 50% 0%, var(--accent-dim) 0%, transparent 70%),
    radial-gradient(ellipse 30% 50% at 30% 50%, rgba(124,58,237,0.06) 0%, transparent 60%);
}

/* ── Radar skill chart ── */
.radar-wrap {
  display: flex;
  justify-content: center;
  margin-top: 32px;
}

/* ── Boot overlay (first visit) ── */
.boot-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--accent);
  gap: 8px;
  transition: opacity 0.6s ease;
}
.boot-overlay.fade-out { opacity: 0; pointer-events: none; }
.boot-line { font-size: 0.8rem; opacity: 0; animation: bootLine 0.3s forwards; }
.boot-bar-wrap {
  width: 300px;
  height: 3px;
  background: rgba(0,212,255,0.15);
  border-radius: 2px;
  margin-top: 16px;
  overflow: hidden;
}
.boot-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 2px;
  width: 0;
  transition: width 1.5s cubic-bezier(0.4,0,0.2,1);
}
@keyframes bootLine {
  to { opacity: 1; }
}

/* ── Effects Control Panel ── */
.fx-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: all var(--transition);
  position: relative;
}
.fx-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
.fx-toggle.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.fx-panel {
  position: absolute;
  top: calc(var(--nav-height) + 8px);
  right: 16px;
  width: 260px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  z-index: 200;
  box-shadow: var(--shadow-card), 0 0 24px rgba(0,212,255,0.08);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.fx-panel.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.fx-panel-title {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.fx-panel-title::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.fx-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.fx-row:last-child { border-bottom: none; padding-bottom: 0; }

.fx-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.fx-sublabel {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Toggle switch */
.fx-switch {
  position: relative;
  width: 36px;
  height: 20px;
  flex-shrink: 0;
}
.fx-switch input { opacity: 0; width: 0; height: 0; }
.fx-switch-track {
  position: absolute;
  inset: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}
.fx-switch-track::after {
  content: '';
  position: absolute;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--text-muted);
  top: 2px; left: 2px;
  transition: all 0.2s;
}
.fx-switch input:checked + .fx-switch-track {
  background: var(--accent-dim);
  border-color: var(--accent);
}
.fx-switch input:checked + .fx-switch-track::after {
  background: var(--accent);
  transform: translateX(16px);
  box-shadow: 0 0 6px var(--accent-glow);
}

/* Slider */
.fx-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--bg-secondary);
  outline: none;
  cursor: pointer;
  accent-color: var(--accent);
}
.fx-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
  cursor: pointer;
}
.fx-slider-wrap {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}
.fx-slider-val {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--accent);
  text-align: right;
}

/* ── Responsive tweaks ── */
@media (max-width: 768px) {
  .data-stream { display: none; }
  .hero-content::before, .hero-content::after { display: none; }
  .fx-panel { right: 8px; width: calc(100vw - 16px); }
}