:root {
  --bg-dark: rgba(10,10,25,0.85);
  --panel-bg: rgba(0,0,0,0.35);
  --border-light: rgba(255,255,255,0.06);
  --text-primary: #fff;
  --text-dim: rgba(255,255,255,0.45);
  --text-muted: rgba(255,255,255,0.25);
  --accent-pink: #f093fb;
  --accent-red: #f5576c;
  --accent-blue: #4facfe;
  --accent-green: #43e97b;
  --gradient-primary: linear-gradient(135deg, var(--accent-pink), var(--accent-red));
  --gradient-blue: linear-gradient(135deg, var(--accent-blue), #00f2fe);
  --gradient-green: linear-gradient(135deg, var(--accent-green), #38f9d7);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 50px;
  --sidebar-w: 200px;
  --transition: 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  height: 100vh; width: 100vw; overflow: hidden;
  color: var(--text-primary); user-select: none;
}

#background-video {
  position: fixed; top: 50%; left: 50%;
  min-width: 100%; min-height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover; z-index: -2;
}

.screen-mask {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, var(--bg-dark), rgba(15,15,30,0.85));
  z-index: -1;
}

/* floating orbs */
.floating-orb {
  position: fixed; border-radius: 50%;
  filter: blur(80px); pointer-events: none;
  z-index: 0; opacity: 0.25;
}
.orb-pink {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #f5af19, transparent 70%);
  top: -150px; right: -100px;
  animation: orb-drift 12s ease-in-out infinite alternate;
}
.orb-blue {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--accent-blue), transparent 70%);
  bottom: -100px; left: 5%;
  animation: orb-drift 14s ease-in-out infinite alternate-reverse;
}
.orb-green {
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--accent-green), transparent 70%);
  top: 40%; right: 10%;
  animation: orb-drift 10s ease-in-out infinite alternate;
}
@keyframes orb-drift {
  0% { transform: translate(0,0) scale(1); }
  100% { transform: translate(40px,-40px) scale(1.15); }
}

/* layout */
.layout-wrapper {
  position: relative; z-index: 1;
  display: flex; height: 100vh; width: 100vw;
}

/* menu toggle (hamburger) */
.menu-toggle {
  display: none; position: fixed; top: 1rem; left: 1rem;
  width: 40px; height: 40px; z-index: 20;
  background: rgba(0,0,0,0.4); backdrop-filter: blur(8px);
  border: 1px solid var(--border-light); border-radius: var(--radius-md);
  cursor: pointer; flex-direction: column;
  align-items: center; justify-content: center; gap: 4px;
  padding: 0; transition: all var(--transition);
}
.menu-toggle span {
  display: block; width: 20px; height: 2px;
  background: rgba(255,255,255,0.7); border-radius: 2px;
  transition: all var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,0.1); }
.menu-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* sidebar overlay (mobile) */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.5); z-index: 8;
  opacity: 0; transition: opacity 0.3s ease;
  pointer-events: none;
}
.sidebar-overlay.show { opacity: 1; pointer-events: auto; }

/* side panel */
.side-panel {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--panel-bg);
  border-right: 1px solid var(--border-light);
  display: flex; flex-direction: column;
  padding: 1.5rem 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  position: relative; z-index: 9;
}

.panel-header {
  display: flex; flex-direction: column; align-items: center;
  padding: 0 1rem 1.2rem; border-bottom: 1px solid var(--border-light);
}

.panel-avatar {
  position: relative; width: 60px; height: 60px;
  border-radius: 50%; overflow: hidden;
  border: 2px solid rgba(240,147,251,0.5);
  box-shadow: 0 0 20px rgba(240,147,251,0.15);
  cursor: pointer; transition: transform var(--transition);
}
.panel-avatar:hover { transform: scale(1.1); }
.panel-avatar video,
.panel-avatar img { width: 100%; height: 100%; object-fit: cover; }

.online-badge {
  position: absolute; bottom: 0; right: 0;
  width: 14px; height: 14px;
  background: var(--accent-green); border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.4);
}

.panel-nickname {
  margin-top: 0.6rem;
  font-size: 0.95rem; font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.panel-title {
  font-size: 0.7rem; color: var(--text-muted);
  margin-top: 0.15rem; letter-spacing: 1px;
}

/* navigation */
.page-nav {
  flex: 1; padding: 0.8rem 0.6rem;
  display: flex; flex-direction: column; gap: 0.2rem;
}

.nav-entry {
  display: flex; align-items: center; gap: 0.65rem;
  padding: 0.7rem 0.9rem;
  background: transparent; border: none; border-radius: var(--radius-md);
  color: var(--text-dim); font-size: 0.85rem;
  cursor: pointer; transition: all var(--transition);
  width: 100%; text-align: left; position: relative;
}
.nav-entry svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-entry:hover { background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.8); }
.nav-entry.active {
  background: linear-gradient(135deg, rgba(240,147,251,0.15), rgba(245,87,108,0.1));
  color: var(--text-primary);
}
.nav-entry.active::before {
  content: ""; position: absolute; left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 50%;
  background: var(--gradient-primary);
  border-radius: 0 3px 3px 0;
}

.panel-footer {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1rem 0.5rem;
  font-size: 0.7rem; color: rgba(255,255,255,0.3);
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
}

.viz-toggle {
  display: flex; align-items: center; gap: 0.35rem;
  padding: 0.3rem 0.5rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm); color: var(--text-dim);
  font-size: 0.7rem; cursor: pointer;
  transition: all var(--transition);
}
.viz-toggle:hover { background: rgba(255,255,255,0.07); color: rgba(255,255,255,0.6); }
.viz-toggle.active { color: rgba(79,172,254,0.7); border-color: rgba(79,172,254,0.2); }
.viz-toggle svg { width: 14px; height: 14px; }

.live-indicator {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(67,233,123,0.6); }
  50% { box-shadow: 0 0 0 6px rgba(67,233,123,0); }
}

/* main stage */
.main-stage {
  flex: 1; overflow-y: auto;
  padding: 2rem 3rem 5rem;
  display: flex; flex-direction: column;
  scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.main-stage::-webkit-scrollbar { width: 4px; }
.main-stage::-webkit-scrollbar-track { background: transparent; }
.main-stage::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; }

.stage { display: none; }
.stage.active { display: flex; flex-direction: column; align-items: center; justify-content: flex-start; min-height: 100%; padding-top: 2rem; animation: stage-in 0.5s ease both; }
@keyframes stage-in { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }

.stage-container { width: 100%; max-width: 750px; }

.stage-header { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.5rem; }
.stage-icon {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md); font-size: 1.1rem;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border-light);
}
.stage-title {
  font-size: 1.6rem; font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stage-divider { width: 50px; height: 3px; background: linear-gradient(90deg, var(--accent-pink), var(--accent-red), transparent); border-radius: 3px; margin-bottom: 1.8rem; }
.stage-hint { color: var(--text-dim); margin-bottom: 1.2rem; font-size: 0.85rem; }

/* home */
.welcome-area { display: flex; flex-direction: column; align-items: center; text-align: center; }

.avatar-cluster { position: relative; margin-bottom: 1.2rem; display: flex; flex-direction: column; align-items: center; }

.music-viz { display: block; width: 260px; height: 50px; margin-bottom: 0.5rem; border-radius: var(--radius-md); opacity: 0.9; transition: opacity 0.4s ease; }
.music-viz.hidden { opacity: 0; pointer-events: none; }

.avatar-frame {
  position: relative; width: 120px; height: 120px;
  border-radius: 50%; overflow: hidden;
  cursor: pointer; transition: transform var(--transition);
}
.avatar-frame:hover { transform: scale(1.08); }

.avatar-ring {
  position: absolute; inset: -4px; border-radius: 50%;
  border: 3px solid transparent;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-red), var(--accent-blue), var(--accent-green)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: ring-spin 3s linear infinite;
}
@keyframes ring-spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.avatar-frame video,
.avatar-frame img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

.avatar-aura {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 160px; height: 160px; border-radius: 50%;
  background: radial-gradient(circle, rgba(240,147,251,0.2), transparent 70%);
  animation: aura-pulse 2s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes aura-pulse {
  from { transform: translate(-50%,-50%) scale(0.9); opacity: 0.6; }
  to { transform: translate(-50%,-50%) scale(1.2); opacity: 1; }
}

.user-name {
  font-size: 2.5rem; font-weight: 700; letter-spacing: 1px;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 0.3rem;
}
.user-slogan { font-size: 1rem; color: rgba(255,255,255,0.6); min-height: 1.6rem; margin-bottom: 0.5rem; }
.user-slogan::after { content: "|"; animation: blink 0.8s step-end infinite; color: var(--accent-pink); }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }
.user-brief { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.8rem; letter-spacing: 1px; }

.stats-row { display: flex; gap: 2.5rem; margin-bottom: 2rem; }
.stats-cell { display: flex; flex-direction: column; align-items: center; gap: 0.15rem; }
.stats-figure { font-size: 1.5rem; font-weight: 800; background: var(--gradient-blue); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stats-unit { font-size: 0.7rem; color: var(--text-muted); letter-spacing: 1px; }

.action-group { display: flex; gap: 1rem; margin-bottom: 2.5rem; }

.action-primary, .action-secondary {
  padding: 0.65rem 1.8rem; border-radius: var(--radius-full);
  font-size: 0.85rem; font-weight: 600; cursor: pointer;
  transition: all var(--transition); letter-spacing: 0.5px;
  border: none; position: relative; overflow: hidden;
}
.action-primary {
  background: var(--gradient-primary); color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(240,147,251,0.3);
}
.action-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(240,147,251,0.45); }
.action-primary:active { transform: scale(0.97); }
.action-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.action-secondary {
  background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.12);
}
.action-secondary:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); transform: translateY(-2px); }
.action-secondary:active { transform: scale(0.97); }
.action-secondary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* daily quote */
.daily-quote {
  max-width: 480px; padding: 1rem 1.5rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md); position: relative; text-align: center;
}
.quote-mark { position: absolute; top: -6px; left: 12px; font-size: 2.5rem; line-height: 1; color: rgba(240,147,251,0.2); font-family: Georgia, serif; }
.quote-body { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.7; font-style: italic; min-height: 2rem; }
.quote-source { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.4rem; }
.quote-source::before { content: "—— "; }

/* about */
.bio-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); padding: 1.5rem;
  margin-bottom: 1.2rem; position: relative; overflow: hidden;
}
.bio-card::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--accent-pink), var(--accent-red), transparent);
}
.bio-content p { color: rgba(255,255,255,0.7); line-height: 1.9; margin-bottom: 0.8rem; font-size: 0.9rem; }
.bio-content p:last-child { margin-bottom: 0; }

.meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; }
.meta-cell {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.8rem 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.meta-cell:hover { background: rgba(255,255,255,0.06); }
.meta-emoji { font-size: 1.2rem; }
.meta-cell div { display: flex; flex-direction: column; gap: 0.1rem; }
.meta-key { font-size: 0.65rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.meta-val { font-size: 0.85rem; color: rgba(255,255,255,0.8); }

/* skills */
.skill-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.skill-group {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); padding: 1.2rem 1.4rem;
  position: relative; overflow: hidden;
}
.skill-group::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 2px; background: linear-gradient(90deg, var(--accent-pink), var(--accent-red), transparent); }
.skill-group:nth-child(2)::before { background: linear-gradient(90deg, var(--accent-blue), #00f2fe, transparent); }
.skill-group:nth-child(3)::before { background: linear-gradient(90deg, var(--accent-green), #38f9d7, transparent); }

.skill-group-header { display: flex; align-items: center; gap: 0.5rem; margin-bottom: 1rem; }
.skill-emoji { font-size: 1.1rem; }
.skill-group-header h3 { font-size: 0.85rem; font-weight: 600; color: var(--text-dim); letter-spacing: 1px; }

.skill-row { margin-bottom: 0.8rem; display: flex; align-items: center; gap: 0.6rem; }
.skill-label { font-size: 0.75rem; color: var(--text-dim); width: 100px; flex-shrink: 0; }
.skill-track { flex: 1; height: 6px; background: rgba(255,255,255,0.06); border-radius: 10px; overflow: hidden; }
.skill-fill { height: 100%; border-radius: 10px; background: var(--gradient-primary); transition: width 1s ease; position: relative; }
.skill-fill::after { content: ""; position: absolute; top: 0; right: 0; width: 20px; height: 100%; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3)); border-radius: 10px; }
.skill-group:nth-child(2) .skill-fill { background: var(--gradient-blue); }
.skill-group:nth-child(3) .skill-fill { background: var(--gradient-green); }
.skill-pct { font-size: 0.7rem; color: var(--text-dim); width: 30px; text-align: right; flex-shrink: 0; }

/* projects */
.project-wall { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.project-entry {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all var(--transition);
}
.project-entry:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.3); border-color: rgba(255,255,255,0.1); background: rgba(255,255,255,0.05); }

.project-banner { height: 90px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.project-banner::after { content: ""; position: absolute; bottom: 0; left: 0; width: 100%; height: 30px; background: linear-gradient(transparent, rgba(0,0,0,0.3)); }
.project-idx { font-size: 2rem; font-weight: 900; color: rgba(255,255,255,0.15); position: relative; z-index: 1; }

.project-detail { padding: 1rem 1.2rem 1.1rem; }
.project-detail h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.35rem; }
.project-detail p { font-size: 0.78rem; color: rgba(255,255,255,0.4); line-height: 1.5; margin-bottom: 0.7rem; }

.project-tags { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-bottom: 0.7rem; }
.project-tags span { padding: 0.15rem 0.5rem; background: rgba(255,255,255,0.05); border-radius: 5px; font-size: 0.65rem; color: rgba(255,255,255,0.4); }

.project-actions { display: flex; gap: 1rem; }
.project-link { font-size: 0.75rem; color: var(--accent-blue); text-decoration: none; transition: color 0.2s; }
.project-link:hover { color: var(--accent-pink); }

/* contacts */
.contact-wall { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0.8rem; }

.contact-entry {
  display: flex; flex-direction: column; align-items: center; gap: 0.4rem;
  padding: 1.2rem 0.8rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  text-align: center; text-decoration: none;
  transition: all var(--transition);
}
.contact-entry:hover { transform: translateY(-3px); background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.12); box-shadow: 0 8px 25px rgba(0,0,0,0.2); }

.contact-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); transition: transform var(--transition); }
.contact-entry:hover .contact-icon { transform: scale(1.1) rotate(5deg); }
.contact-icon svg { width: 20px; height: 20px; color: var(--text-primary); }
.contact-icon img { width: 24px; height: 24px; object-fit: contain; border-radius: 4px; }
.contact-icon:has(img) { background: rgba(255,255,255,0.1); }

.contact-entry[data-type="mail"] .contact-icon { background: linear-gradient(135deg,#667eea,#764ba2); }
.contact-entry[data-type="github"] .contact-icon { background: linear-gradient(135deg,#333,#666); }
.contact-entry[data-type="weibo"] .contact-icon { background: linear-gradient(135deg,#e6162d,#ff6b6b); }
.contact-entry[data-type="bilibili"] .contact-icon { background: linear-gradient(135deg,#00a1d6,#66ccff); }
.contact-entry[data-type="twitter"] .contact-icon { background: linear-gradient(135deg,#1da1f2,#0d8bd9); }
.contact-entry[data-type="wechat"] .contact-icon { background: linear-gradient(135deg,#07c160,#1ad173); }

.contact-name { font-size: 0.8rem; font-weight: 600; color: rgba(255,255,255,0.7); }
.contact-addr { font-size: 0.7rem; color: var(--text-muted); }

/* friend links */
.friend-wall { display: grid; grid-template-columns: 1fr 1fr; gap: 0.7rem; }

.friend-entry {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 0.9rem 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md); text-decoration: none;
  transition: all var(--transition);
}
.friend-entry:hover { background: rgba(255,255,255,0.06); transform: translateY(-2px); border-color: rgba(79,172,254,0.25); box-shadow: 0 4px 15px rgba(0,0,0,0.15); }

.friend-idx { font-size: 1.1rem; font-weight: 800; color: rgba(255,255,255,0.1); width: 28px; flex-shrink: 0; text-align: center; }
.friend-info strong { display: block; font-size: 0.85rem; color: rgba(255,255,255,0.8); margin-bottom: 0.1rem; }
.friend-info p { font-size: 0.7rem; color: var(--text-dim); }

/* player toggle */
#playerToggle {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  width: 50px; height: 50px; border-radius: 50%; border: none;
  background: linear-gradient(135deg, rgba(240,147,251,0.2), rgba(79,172,254,0.2));
  backdrop-filter: blur(12px); color: var(--text-primary);
  cursor: pointer; z-index: 10;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
}
#playerToggle:hover { transform: scale(1.1); box-shadow: 0 6px 25px rgba(240,147,251,0.25); background: linear-gradient(135deg, rgba(240,147,251,0.3), rgba(79,172,254,0.3)); }
#playerToggle:active { transform: scale(0.95); }
#playerToggle svg { width: 22px; height: 22px; transition: all var(--transition); }
#playerToggle .pause-icon { display: none; }
#playerToggle.playing .play-icon { display: none; }
#playerToggle.playing .pause-icon { display: block; }
#playerToggle::after {
  content: ""; position: absolute; inset: -3px; border-radius: 50%;
  border: 2px solid transparent;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-blue), var(--accent-green)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: ring-spin 4s linear infinite;
  opacity: 0; transition: opacity var(--transition);
}
#playerToggle.playing::after { opacity: 1; }

/* ========== featured gallery (clean) ========== */
@keyframes border-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
.featured-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  width: 100%;
}
.featured-item {
  position: relative;
  border-radius: var(--radius-lg);
  cursor: pointer;
  background: rgba(255,255,255,0.02);
  transition: all var(--transition);
  aspect-ratio: 16/10;
  padding: 3px;
  background: linear-gradient(
    135deg, rgba(240,147,251,0.3), rgba(79,172,254,0.3),
    rgba(67,233,123,0.3), rgba(240,147,251,0.3)
  );
  background-size: 300% 300%;
  animation: border-shift 4s ease-in-out infinite;
}
.featured-item video,
.featured-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: calc(var(--radius-lg) - 3px);
  transition: transform 0.4s ease, filter 0.4s ease;
  pointer-events: none;
}
.featured-item video::-webkit-media-controls,
.featured-item video::-webkit-media-controls-enclosure {
  display: none !important;
}
.featured-item:hover video,
.featured-item:hover img {
  transform: scale(1.04);
  filter: brightness(1.08);
}
.featured-item:hover {
  background: linear-gradient(
    135deg, var(--accent-pink), var(--accent-blue),
    var(--accent-green), var(--accent-pink)
  );
  background-size: 300% 300%;
  animation: border-shift 3s ease-in-out infinite;
  box-shadow: 0 0 30px rgba(240,147,251,0.2), 0 0 60px rgba(79,172,254,0.1);
}

/* download button — top-right, on hover */
.featured-dl {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  border: 1.5px solid rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  z-index: 2;
  opacity: 0;
  transition: all var(--transition);
  transform: translateY(-6px) scale(0.9);
}
.featured-dl svg { width: 16px; height: 16px; }
.featured-item:hover .featured-dl {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.featured-dl:hover {
  background: rgba(240,147,251,0.5);
  border-color: rgba(240,147,251,0.4);
  color: #fff;
  transform: scale(1.12) !important;
}

/* featured tabs */
.featured-tabs {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
}
.ftab {
  padding: 0.55rem 1.4rem;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-light);
  color: var(--text-dim);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.ftab:hover {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.7);
}
.ftab.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(240,147,251,0.3);
}
.ftab-count {
  font-size: 0.7rem;
  background: rgba(0,0,0,0.15);
  padding: 0.05rem 0.45rem;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
  font-weight: 600;
}
.ftab.active .ftab-count {
  background: rgba(0,0,0,0.12);
}
.featured-panel { display: none; }
.featured-panel.ftab-show { display: block; }

/* featured section: full width */
#section-featured .stage-container {
  max-width: none;
  width: 100%;
}

/* ========== preview section (full-screen) ========== */
.preview-stage {
  position: absolute !important;
  inset: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  min-height: 0 !important;
  animation: none !important;
}
.preview-frame {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: #fff;
}
.preview-refresh {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  color: rgba(255,255,255,0.8);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 10;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.preview-refresh:hover {
  background: rgba(240,147,251,0.4);
  border-color: rgba(240,147,251,0.3);
  color: #fff;
  transform: scale(1.1);
}

.main-stage.preview-mode {
  position: relative;
  padding: 0 !important;
  overflow: hidden;
}

/* ========== lightbox ========== */
.lightbox-overlay {
  display: none; position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.9); backdrop-filter: blur(10px);
  align-items: center; justify-content: center;
  animation: lb-fade 0.25s ease;
}
.lightbox-overlay.show { display: flex; }
@keyframes lb-fade { from { opacity: 0; } to { opacity: 1; } }
.lightbox-close {
  position: absolute; top: 1rem; right: 1.5rem;
  background: none; border: none; color: #fff;
  font-size: 2.5rem; cursor: pointer; z-index: 1001; opacity: 0.7;
  transition: opacity 0.2s; line-height: 1;
}
.lightbox-close:hover { opacity: 1; }
.lightbox-content {
  max-width: 90vw; max-height: 85vh; display: flex;
  align-items: center; justify-content: center;
}
.lightbox-content video, .lightbox-content img {
  max-width: 100%; max-height: 85vh; border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-download {
  position: absolute; bottom: 1.5rem; right: 1.5rem;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: #fff; text-decoration: none; transition: all var(--transition);
  cursor: pointer;
}
.lightbox-download svg { width: 20px; height: 20px; }
.lightbox-download:hover { background: var(--accent-blue); border-color: var(--accent-blue); transform: scale(1.1); }

/* background image */
#background-image {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover; background-position: center;
  z-index: -2;
}

/* responsive */
@media (max-width: 900px) {
  .main-stage { padding: 1.5rem; }
  .contact-wall { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }

  .sidebar-overlay { display: block; }

  .side-panel {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 220px; min-width: unset;
    transform: translateX(-100%);
    border-right: 1px solid var(--border-light);
    z-index: 9;
  }
  .side-panel.open { transform: translateX(0); }

  .panel-header { padding-top: 3rem; }

  .page-nav {
    flex-direction: column; padding: 0.5rem 0.6rem;
    gap: 0.2rem; overflow-x: visible;
  }
  .nav-entry { padding: 0.7rem 0.9rem; font-size: 0.85rem; white-space: normal; flex-shrink: 0; width: 100%; }
  .nav-entry span { display: inline; }
  .nav-entry svg { width: 18px; height: 18px; }
  .nav-entry.active::before { display: block; }

  .panel-footer { display: flex; }

  .main-stage { padding: 1.2rem 1rem; padding-top: 1rem; }
  .user-name { font-size: 1.8rem; }
  .stats-row { gap: 1.5rem; }

  .skill-panel, .project-wall, .contact-wall, .friend-wall, .meta-grid { grid-template-columns: 1fr; }
  .featured-wall { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
  .lightbox-content { max-width: 95vw; }

  #playerToggle { bottom: 1rem; right: 1rem; width: 44px; height: 44px; }
  #playerToggle svg { width: 18px; height: 18px; }

  .main-stage.preview-mode { padding: 0 !important; }
  .preview-refresh { bottom: 1rem; right: 1rem; width: 40px; height: 40px; }
}