/* ========================================================
   AirPlay 2 Liquid Glass Dashboard & Diagnostics
   OPTIMIZED FOR 22-INCH (1080p / 1440p) MONITORS & RETINA
   ======================================================== */

:root {
  --bg-deep: #050507;
  --artwork-primary: #fa2d55;
  --artwork-ambient: rgba(250, 45, 85, 0.45);
  --artwork-glow: rgba(250, 45, 85, 0.65);

  /* ========================================================
     BACKDROP & GLASS TEMPLATE SYSTEM (UI/UX PRO MAX & IMPECCABLE)
     Template Preset: Discernible Artwork Backdrop + Frosted Glass
     ======================================================== */
  --backdrop-blur: 16px;              /* Soft cinematic blur: preserves artwork recognition */
  --backdrop-scale: 1.05;             /* Subtle cinematic bleed & crop */
  --backdrop-brightness: 0.50;        /* Optical contrast floor */
  --backdrop-saturate: 135%;          /* Rich, natural color rendering */
  --backdrop-opacity: 0.92;           /* Visible artwork backdrop */

  /* Frosted Liquid Glass Tokens (Apple-grade depth & refraction) */
  --glass-surface: rgba(18, 20, 28, 0.50);
  --glass-surface-hover: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.15);
  --glass-border-liquid: rgba(255, 255, 255, 0.32);
  --glass-blur: 28px;
  --glass-specular: inset 0 1px 1px rgba(255, 255, 255, 0.28);
  --glass-shadow: 0 14px 38px rgba(0, 0, 0, 0.45);

  --text-pure: #ffffff;
  --text-muted: rgba(255, 255, 255, 0.88);
  --text-sub: rgba(255, 255, 255, 0.62);
  --apple-pink: #fa2d55;
  --apple-green: #30d158;
  --apple-amber: #ff9f0a;
  --apple-cyan: #64d2ff;
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
  --radius-hero: 38px;
  --radius-card: 22px;
  --radius-pill: 40px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html, body {
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--bg-deep);
  color: var(--text-pure);
  font-family: var(--font-stack);
  overflow-x: hidden;
  position: relative;
}

/* ========================================================
   DYNAMIC ARTWORK COLOR BACKDROP (COLOR-MATCHED AMBIENCE)
   ======================================================== */
.ambient-color-mesh {
  position: fixed;
  inset: -100px;
  background: radial-gradient(circle at 25% 35%, var(--artwork-ambient) 0%, rgba(5, 5, 8, 0.85) 60%),
              radial-gradient(circle at 75% 65%, var(--artwork-glow) 0%, rgba(5, 5, 8, 0.95) 70%),
              #050507;
  filter: blur(100px);
  opacity: 0.85;
  transition: background 1.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s ease;
  pointer-events: none;
  z-index: 0;
}

.ambient-backdrop {
  position: fixed;
  top: -50px;
  left: -50px;
  right: -50px;
  bottom: -50px;
  background-size: cover;
  background-position: center center;
  filter: blur(var(--backdrop-blur)) saturate(var(--backdrop-saturate)) brightness(var(--backdrop-brightness));
  opacity: var(--backdrop-opacity);
  transform: scale(var(--backdrop-scale));
  transition: background-image 1.2s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s ease, filter 0.8s ease;
  pointer-events: none;
  z-index: 1;
}

.ambient-liquid-overlay {
  position: fixed;
  inset: 0;
  background: 
    radial-gradient(circle at 65% 45%, rgba(6, 8, 12, 0.25) 0%, rgba(5, 5, 8, 0.7) 72%, rgba(3, 4, 6, 0.92) 100%),
    linear-gradient(180deg, rgba(4, 5, 8, 0.5) 0%, rgba(5, 5, 8, 0.15) 35%, rgba(3, 4, 6, 0.85) 100%);
  pointer-events: none;
  z-index: 2;
}

/* ================= Shell Container (22-Inch Monitor Scaled) ================= */
.dashboard-shell {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 1620px; /* Designed for 1920x1080 22-inch displays */
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px 48px 40px;
}

/* ================= Header & Segmented Navigation ================= */
.dashboard-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  margin-bottom: 36px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.airplay-icon-glass {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.05));
  border: 1px solid var(--glass-border-liquid);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-pure);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4), inset 0 1.5px 2px rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(24px);
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-pill {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.1);
  color: var(--artwork-primary);
  border: 1px solid var(--glass-border-liquid);
  padding: 4px 11px;
  border-radius: 20px;
  backdrop-filter: blur(16px);
  transition: color 0.5s ease;
}

/* Apple-style Frosted Segmented Control */
.nav-segment-control {
  display: flex;
  align-items: center;
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border-liquid);
  border-radius: var(--radius-pill);
  padding: 5px;
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  box-shadow: var(--glass-shadow), var(--glass-specular);
}

.nav-tab-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 700;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-tab-btn:hover {
  color: var(--text-pure);
  transform: translateY(-1px);
}

.nav-tab-btn:active {
  transform: scale(0.96);
  transition: transform 0.08s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nav-tab-btn.active {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.14));
  color: var(--text-pure);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45), inset 0 1px 2px rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

/* Header Right Status */
.header-right {
  display: flex;
  justify-content: flex-end;
}

.status-glass-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  padding: 9px 20px;
  border-radius: var(--radius-pill);
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35), var(--glass-specular);
}

.status-pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--apple-green);
  box-shadow: 0 0 12px var(--apple-green);
}

.status-pulse-dot.paused {
  background: var(--apple-amber);
  box-shadow: 0 0 12px var(--apple-amber);
}

.status-pulse-dot.stopped {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: none;
}

/* ================= Tab Views Switcher ================= */
.view-panel {
  display: none;
  opacity: 0;
  transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateY(10px);
  flex: 1;
}

.view-panel.active {
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================
   TAB 1: NOW PLAYING VIEW (POLISHED FOR 22" MONITORS)
   ======================================================== */
.now-playing-container {
  display: grid;
  grid-template-columns: minmax(420px, 560px) 1fr;
  gap: 80px;
  align-items: center;
  width: 100%;
  margin: auto 0;
  padding: 10px 0;
}

/* Artwork Stage */
.artwork-stage {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Liquid Glass Frame (High-Gloss Sheen) */
.liquid-glass-frame {
  position: relative;
  width: 100%;
  max-width: 560px;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-hero);
  overflow: hidden;
  background: #0d0d12;
  border: 1.8px solid var(--glass-border-liquid);
  box-shadow: 
    0 55px 120px -25px rgba(0, 0, 0, 0.98),
    0 0 70px var(--artwork-glow),
    inset 0 2px 3px rgba(255, 255, 255, 0.6),
    inset 0 -4px 10px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(40px) saturate(220%);
  -webkit-backdrop-filter: blur(40px) saturate(220%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.6s ease;
}

.liquid-glass-frame:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 65px 140px -25px rgba(0, 0, 0, 0.98),
    0 0 100px var(--artwork-glow),
    inset 0 2.5px 4px rgba(255, 255, 255, 0.75);
}

.artwork-viewport {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-hero);
  overflow: hidden;
}

.artwork-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: var(--radius-hero);
}

.artwork-img.active {
  opacity: 1;
}

/* Standby Apple AirPlay Liquid Glass Hero Display */
.artwork-standby-hero {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.08) 0%, rgba(10, 10, 14, 0.96) 100%);
  z-index: 2;
}

.artwork-standby-hero.active {
  opacity: 1;
  pointer-events: auto;
}

.standby-glass-core {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  text-align: center;
}

.standby-airplay-badge {
  width: 140px;
  height: 140px;
  border-radius: 40px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.04));
  border: 1.5px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), 0 0 40px rgba(255, 255, 255, 0.08), inset 0 2px 4px rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  animation: standbyPulse 4.5s ease-in-out infinite;
}

@keyframes standbyPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.65), 0 0 30px rgba(255, 255, 255, 0.08), inset 0 2px 4px rgba(255, 255, 255, 0.45);
  }
  50% {
    transform: scale(1.03);
    box-shadow: 0 26px 65px rgba(0, 0, 0, 0.75), 0 0 50px rgba(255, 255, 255, 0.2), inset 0 2.5px 5px rgba(255, 255, 255, 0.6);
  }
}

.standby-brand-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.standby-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.standby-pill {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 5px 16px;
  border-radius: 20px;
}

.glass-specular-highlight {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.28) 0%, rgba(255, 255, 255, 0.05) 30%, transparent 60%);
  pointer-events: none;
  z-index: 3;
}

.glass-inner-reflection {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 48%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.16) 0%, transparent 100%);
  pointer-events: none;
  z-index: 3;
}

.liquid-rim-glow {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-hero);
  box-shadow: inset 0 0 24px rgba(255, 255, 255, 0.15);
  pointer-events: none;
  z-index: 4;
}

/* Right Hero Music Details (22-inch Room-Scale Presence) */
.music-details-stage {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 40px;
}

.song-meta-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.genre-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.glass-badge {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 5px 15px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-border);
  color: var(--text-sub);
  backdrop-filter: blur(20px);
}

.glass-badge.highlight {
  background: rgba(255, 255, 255, 0.12);
  color: var(--artwork-primary);
  border-color: var(--glass-border-liquid);
  box-shadow: 0 4px 14px var(--artwork-ambient);
  transition: color 0.5s ease;
}

.song-title {
  font-size: clamp(38px, 3.4vw, 58px);
  font-weight: 800;
  letter-spacing: -1.4px;
  line-height: 1.1;
  color: var(--text-pure);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.85), 0 2px 6px rgba(0, 0, 0, 0.95);
}

.song-artist {
  font-size: clamp(22px, 1.8vw, 32px);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--artwork-primary);
  line-height: 1.25;
  transition: color 0.5s ease;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.85);
}

.song-album {
  font-size: clamp(17px, 1.2vw, 22px);
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.35;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

/* Glossy Audio Seeking / Progress Bar (Thicker & More Liquid) */
.audio-seeking-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 30px;
  border-radius: var(--radius-card);
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  box-shadow: var(--glass-shadow), var(--glass-specular);
  transition: opacity 0.4s ease, border-color 0.4s ease;
}

.audio-seeking-panel.stopped {
  opacity: 0.72;
}

.progress-bar-container {
  width: 100%;
  cursor: pointer;
  border-radius: 9999px;
  outline: none;
}

.progress-bar-container:focus-visible {
  outline: 2px solid var(--artwork-primary, #fa2d55);
  outline-offset: 4px;
}

.progress-track-glass {
  position: relative;
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  overflow: visible;
  box-shadow: inset 0 1.5px 3px rgba(0, 0, 0, 0.6);
  transition: height 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.25s ease;
}

.progress-bar-container:hover .progress-track-glass {
  height: 12px;
  background: rgba(255, 255, 255, 0.22);
}

.progress-fill-glow {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--artwork-primary), #ff416c);
  box-shadow: 0 0 20px var(--artwork-glow);
  transition: background 0.5s ease;
}

.progress-scrub-knob {
  position: absolute;
  top: 50%;
  left: 0%;
  transform: translate(-50%, -50%) scale(1);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.6), 0 0 14px var(--artwork-glow);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
  pointer-events: none;
}

.progress-bar-container:hover .progress-scrub-knob {
  transform: translate(-50%, -50%) scale(1.35);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.7), 0 0 24px var(--artwork-primary), 0 0 36px var(--artwork-glow);
}

/* While playing: ONLY cancel transition on left/width so requestAnimationFrame drives exact position with 0 latency, while allowing hover transform/shadow to spring smoothly */
.audio-seeking-panel.playing .progress-fill-glow {
  transition: width 0s linear, background 0.5s ease;
}

.audio-seeking-panel.playing .progress-scrub-knob {
  transition: left 0s linear, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}

/* While stopped: smooth animated reset snap */
.audio-seeking-panel.stopped .progress-fill-glow {
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1), background 0.5s ease;
}

.audio-seeking-panel.stopped .progress-scrub-knob {
  transition: left 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}

.time-readout-row {
  display: flex;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text-sub);
}

.seek-hint-toast {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  padding: 5px 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.seek-hint-toast.active {
  opacity: 1;
  transform: translateY(0);
}

/* Floating Audio Info Pills */
.now-playing-pills-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.floating-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  color: var(--text-pure);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32), var(--glass-specular);
}

.floating-pill svg {
  color: var(--artwork-primary);
  transition: color 0.5s ease;
}

/* ========================================================
   TAB 2: VINTAGE ANALOGUE VU METERS CONSOLE
   ======================================================== */
.vintage-vu-console {
  background: linear-gradient(180deg, rgba(18, 20, 28, 0.88) 0%, rgba(10, 12, 16, 0.94) 100%);
  border: 1.8px solid rgba(255, 255, 255, 0.16);
  border-radius: 26px;
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  padding: 28px 34px;
  box-shadow: 
    0 30px 70px rgba(0, 0, 0, 0.75),
    var(--glass-specular),
    inset 0 -2px 4px rgba(0, 0, 0, 0.85);
  margin-bottom: 30px;
}

.vu-console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.vu-chassis-brand {
  font-size: 11.5px;
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 1.4px;
  color: #ffaa2b;
}

.vu-console-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.4px;
}

.vu-console-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: nowrap;
}

.vu-lamp-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  font-weight: 700;
  color: #ffd080;
  letter-spacing: 0.6px;
  white-space: nowrap;
}

.lamp-filament {
  width: 9px;
  height: 9px;
  min-width: 9px;
  min-height: 9px;
  max-width: 9px;
  max-height: 9px;
  flex-shrink: 0;
  border-radius: 50%;
  background: #ffaa2b;
  box-shadow: 0 0 8px #ffaa2b, 0 0 16px #ff9000;
  display: inline-block;
}

.vu-mode-badge {
  font-size: 11.5px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.14);
  white-space: nowrap;
}

.vu-meters-chassis {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-bottom: 22px;
}

.analogue-vu-unit {
  position: relative;
  border-radius: 18px;
  padding: 10px;
  background: linear-gradient(145deg, #18181f 0%, #0d0d12 100%);
  border: 2px solid #282834;
  box-shadow: 
    inset 0 2px 4px rgba(255, 255, 255, 0.1),
    inset 0 -2px 6px rgba(0, 0, 0, 0.8),
    0 12px 32px rgba(0, 0, 0, 0.6);
}

.meter-corner-screw {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #555 0%, #222 70%, #111 100%);
  border: 1px solid #1a1a20;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.35), 0 1px 2px rgba(0, 0, 0, 0.9);
  z-index: 6;
}

.meter-corner-screw::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 2px;
  right: 2px;
  height: 1px;
  background: #000;
  transform: translateY(-50%) rotate(42deg);
}

.meter-corner-screw.tl { top: 5px; left: 5px; }
.meter-corner-screw.tr { top: 5px; right: 5px; }
.meter-corner-screw.bl { bottom: 5px; left: 5px; }
.meter-corner-screw.br { bottom: 5px; right: 5px; }

.meter-faceplate {
  position: relative;
  width: 100%;
  height: 270px;
  border-radius: 12px;
  background: #090806;
  border: 1.5px solid #1f1d19;
  box-shadow: 
    inset 0 3px 12px rgba(0, 0, 0, 0.95),
    inset 0 0 20px rgba(0, 0, 0, 0.85);
  overflow: hidden;
}

.meter-bezel-glare {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0.04) 35%, transparent 65%);
  pointer-events: none;
  border-radius: 12px 12px 0 0;
  z-index: 4;
}

.meter-peak-lamp {
  position: absolute;
  top: 12px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 12px;
  background: rgba(10, 8, 6, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6), inset 0 1px 2px rgba(0, 0, 0, 0.8);
  z-index: 5;
}

.meter-peak-lamp .led-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4a1215;
  border: 1px solid #751a20;
  transition: all 0.08s ease;
}

.meter-peak-lamp.active .led-dot {
  background: #ff2035;
  border-color: #ff8090;
  box-shadow: 0 0 12px #ff2035, 0 0 24px #ff0022;
}

.meter-peak-lamp .led-text {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.6px;
  color: rgba(255, 255, 255, 0.45);
}

.meter-peak-lamp.active .led-text {
  color: #ff4d5e;
}

.analogue-vu-unit canvas,
.vu-meter-svg {
  width: 100%;
  height: 100%;
  display: block;
  position: relative;
  z-index: 2;
}

.channel-engraving {
  position: absolute;
  bottom: 8px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 1.8px;
  color: #8c7348;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.95);
  pointer-events: none;
  z-index: 5;
}

/* Meter Status Bar */
.meter-status-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.meter-stat-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.meter-stat-pill .stat-name {
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.6px;
  color: var(--text-sub);
}

.meter-stat-pill .stat-readout {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-pure);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.meter-stat-pill .stat-readout.highlight {
  color: var(--apple-pink);
}

.meter-stat-pill .stat-readout.mono {
  font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
}

/* ========================================================
   AIRPLAY 2 OSCILLOSCOPE & DATA SYNC CARD
   ======================================================== */
.sync-oscilloscope-card {
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 26px 32px;
  backdrop-filter: blur(34px);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.4);
  margin-bottom: 30px;
}

.sync-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.card-tag {
  font-size: 11.5px;
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.9px;
  color: var(--apple-cyan);
}

.sync-heading {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.sync-header-pills {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sync-badge {
  font-size: 12.5px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.sync-badge.ok {
  background: rgba(48, 209, 88, 0.16);
  color: var(--apple-green);
  border-color: rgba(48, 209, 88, 0.35);
}

.oscilloscope-viewport {
  position: relative;
  width: 100%;
  height: 140px;
  border-radius: 16px;
  background: #04090b;
  border: 1.5px solid rgba(100, 210, 255, 0.25);
  box-shadow: inset 0 0 35px rgba(100, 210, 255, 0.1);
  overflow: hidden;
  margin-bottom: 18px;
}

.oscilloscope-crt-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(100, 210, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 210, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: 1;
}

.osc-axis-label {
  position: absolute;
  left: 12px;
  font-size: 10px;
  font-weight: 700;
  font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
  color: rgba(100, 210, 255, 0.6);
  pointer-events: none;
  z-index: 3;
}

.osc-axis-label.top { top: 8px; }
.osc-axis-label.zero { top: 50%; transform: translateY(-50%); color: rgba(100, 210, 255, 0.9); }
.osc-axis-label.bottom { bottom: 8px; }

#oscilloscope-canvas,
#oscilloscope-svg {
  width: 100%;
  height: 100%;
  display: block;
  position: relative;
  z-index: 2;
}

.sync-metrics-ticker {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.ticker-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.t-label {
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-sub);
}

.t-val {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-pure);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.t-val.status-ok {
  color: var(--apple-green);
}

.t-val.highlight {
  color: var(--apple-pink);
}

.t-val.mono {
  font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
}

/* ========================================================
   BOTTOM GRID: AUDIO BITSTREAM & HARDWARE
   ======================================================== */
.diag-bottom-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.tech-card {
  background: var(--glass-surface);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 26px 30px;
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.35), var(--glass-specular);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tech-card-header {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 16px;
}

.tech-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-icon.stream {
  background: rgba(250, 45, 85, 0.18);
  color: var(--apple-pink);
  border: 1px solid rgba(250, 45, 85, 0.35);
}

.tech-icon.hardware {
  background: rgba(255, 159, 10, 0.18);
  color: var(--apple-amber);
  border: 1px solid rgba(255, 159, 10, 0.35);
}

.tech-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.3px;
}

.tech-desc {
  font-size: 12.5px;
  color: var(--text-sub);
}

.tech-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tech-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13.5px;
}

.t-k {
  color: var(--text-sub);
  font-weight: 500;
}

.t-v {
  color: var(--text-pure);
  font-weight: 600;
  text-align: right;
  max-width: 62%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.t-v.highlight {
  color: var(--apple-pink);
}

.t-v.status-ok {
  color: var(--apple-green);
}

.t-v.mono {
  font-family: ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-size: 12.5px;
}

/* Hardware Sparklines Grid */
.hw-sparklines-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hw-sparkline-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.box-hdr {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-sub);
  text-transform: uppercase;
}

.box-hdr .v-bold {
  color: var(--text-pure);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.hw-sparkline-box canvas,
.hw-sparkline-box svg {
  width: 100%;
  height: 44px;
  display: block;
}

.hw-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-sub);
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hw-footer .sep {
  opacity: 0.4;
}

/* ================= Mobile & Small Displays ================= */
@media (max-width: 1024px) {
  .dashboard-shell {
    padding: 20px 20px 36px;
  }

  .dashboard-header {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 16px;
  }

  .header-right {
    justify-content: center;
  }

  .now-playing-container {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .artwork-stage {
    max-width: 380px;
    margin: 0 auto;
  }

  .music-details-stage {
    text-align: center;
    align-items: center;
    gap: 28px;
  }

  .genre-row {
    justify-content: center;
  }

  .audio-seeking-panel {
    width: 100%;
  }

  .now-playing-pills-row {
    justify-content: center;
  }

  .vu-meters-chassis {
    grid-template-columns: 1fr;
  }

  .meter-status-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .sync-metrics-ticker {
    grid-template-columns: repeat(2, 1fr);
  }

  .diag-bottom-grid {
    grid-template-columns: 1fr;
  }

  .hw-sparkline-box {
    padding: 16px 18px;
    min-height: 80px;
  }
}

/* ======================================================== */
/* Desktop Window Controls & Floating Side Pill             */
/* ======================================================== */

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.window-control-dock {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--glass-surface);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1.5px solid var(--glass-border);
  border-radius: 9999px;
  padding: 4px 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3), var(--glass-specular);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.window-control-dock:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.window-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: rgba(255, 255, 255, 0.75);
  border: none;
  border-radius: 9999px;
  padding: 6px 10px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.window-action-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-1px) scale(1.02);
}

.window-action-btn:active {
  transform: scale(0.95);
  background: rgba(255, 255, 255, 0.2);
  transition: transform 0.08s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.window-action-btn.btn-close:hover {
  background: rgba(255, 69, 58, 0.25);
  color: #ff453a;
}

.key-badge {
  display: inline-block;
  padding: 2px 5px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Mono", "Segoe UI Mono", monospace;
  font-size: 0.65rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.55);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 4px;
  line-height: 1;
}

.window-action-btn:hover .key-badge {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
}

/* Floating Side Desktop Panel (Option on the Side) */
.side-desktop-panel {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(18, 20, 28, 0.58);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  border-right: none;
  border-radius: 16px 0 0 16px;
  padding: 10px 8px 10px 10px;
  box-shadow: -4px 8px 30px rgba(0, 0, 0, 0.5), var(--glass-specular);
  z-index: 1000;
  opacity: 0.85;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.side-desktop-panel:hover {
  opacity: 1;
  background: rgba(24, 24, 32, 0.88);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: -8px 12px 36px rgba(0, 0, 0, 0.7);
  transform: translateY(-50%) translateX(-4px);
}

.side-pill-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
  border-radius: 10px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.side-pill-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
  transform: scale(1.03);
}

.side-pill-btn:active {
  transform: scale(0.95);
  transition: transform 0.08s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.side-pill-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.side-pill-text {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.side-pill-kbd {
  font-family: -apple-system, BlinkMacSystemFont, "SF Mono", "Segoe UI Mono", monospace;
  font-size: 0.65rem;
  padding: 2px 5px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1;
}

.side-pill-btn:hover .side-pill-kbd {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

/* ======================================================== */
/* Accessibility: High-Contrast Focus Ring & Reduced Motion */
/* ======================================================== */

:focus-visible {
  outline: 2px solid var(--artwork-primary) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 16px var(--artwork-glow) !important;
  border-radius: inherit;
}

button:focus:not(:focus-visible) {
  outline: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .standby-airplay-badge {
    animation: none !important;
  }

  .ambient-backdrop,
  .ambient-color-mesh,
  .artwork-img {
    transition: none !important;
  }
}

/* ======================================================== */
/* Interactive Demo Controller (GitHub Pages & Preview Mode)*/
/* ======================================================== */

.demo-controller-dock {
  position: fixed;
  bottom: 24px;
  right: 28px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(18, 20, 28, 0.72);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1.5px solid rgba(255, 255, 255, 0.16);
  border-radius: 9999px;
  padding: 6px 12px;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.5), inset 0 1px 1px rgba(255, 255, 255, 0.25);
  z-index: 1000;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.demo-dock-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  color: var(--apple-cyan);
  text-transform: uppercase;
  padding: 3px 8px;
  background: rgba(100, 210, 255, 0.12);
  border: 1px solid rgba(100, 210, 255, 0.25);
  border-radius: 12px;
}

.demo-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--apple-cyan);
  box-shadow: 0 0 8px var(--apple-cyan);
}

.demo-track-selector {
  display: flex;
  align-items: center;
  gap: 4px;
}

.demo-track-btn {
  background: transparent;
  border: 1px solid transparent;
  color: rgba(255, 255, 255, 0.75);
  padding: 5px 10px;
  border-radius: 9999px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-track-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transform: translateY(-1px);
}

.demo-track-btn.active {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0.14));
  color: #fff;
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.demo-divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.15);
}

.demo-mode-btn,
.demo-play-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.85);
  padding: 5px 12px;
  border-radius: 9999px;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-mode-btn:hover,
.demo-play-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  transform: scale(1.02);
}

.demo-mode-btn:active,
.demo-play-btn:active {
  transform: scale(0.95);
}