/* ============================================
   Rubik's Cube Mixer - Interactive Face Control
   ============================================ */

:root {
  /* Rubik's cube colors - vibrant neon versions */
  --cube-red: #ff1744;
  --cube-orange: #ff9100;
  --cube-blue: #2979ff;
  --cube-green: #00e676;
  --cube-white: #f5f5f5;
  --cube-yellow: #ffea00;

  /* Retro palette */
  --bg-deep: #0a0a12;
  --bg-grid: #12121f;
  --neon-pink: #ff2d95;
  --neon-cyan: #00f0ff;
  --neon-purple: #b24dff;
  --lcd-green: #39ff14;

  /* UI colors */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --border-glow: rgba(0, 240, 255, 0.3);

  /* Cube dimensions */
  --cube-size: 200px;
  --cubie-size: calc(var(--cube-size) / 3);
  --cubie-gap: 3px;
}

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

html {
  font-size: 16px;
}

body {
  min-height: 100vh;
  background: var(--bg-deep);
  font-family: 'Rajdhani', sans-serif;
  color: var(--text-primary);
  overflow-x: hidden;
  position: relative;
}

/* ============================================
   Retro Background Effects
   ============================================ */

.grid-floor {
  position: fixed;
  inset: 0;
  background:
    linear-gradient(to bottom, transparent 0%, var(--bg-deep) 100%),
    repeating-linear-gradient(
      to right,
      transparent,
      transparent 60px,
      rgba(0, 240, 255, 0.03) 60px,
      rgba(0, 240, 255, 0.03) 61px
    ),
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent 60px,
      rgba(0, 240, 255, 0.03) 60px,
      rgba(0, 240, 255, 0.03) 61px
    );
  pointer-events: none;
  z-index: 0;
}

.grid-floor::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50vh;
  background:
    linear-gradient(
      to bottom,
      transparent,
      rgba(178, 77, 255, 0.05) 50%,
      rgba(255, 45, 149, 0.1)
    );
  transform: perspective(500px) rotateX(60deg);
  transform-origin: bottom center;
}

.scanlines {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.15) 2px,
    rgba(0, 0, 0, 0.15) 4px
  );
  pointer-events: none;
  z-index: 1000;
  opacity: 0.4;
}

.vignette {
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 0%,
    transparent 50%,
    rgba(0, 0, 0, 0.8) 100%
  );
  pointer-events: none;
  z-index: 999;
}

/* ============================================
   Header
   ============================================ */

.header {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: all 0.3s ease;
}

.back-link:hover {
  color: var(--neon-cyan);
  text-shadow: 0 0 20px var(--neon-cyan);
}

.back-link svg {
  transition: transform 0.3s ease;
}

.back-link:hover svg {
  transform: translateX(-4px);
}

.header-title {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tag {
  padding: 0.25rem 0.75rem;
  background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
  border-radius: 2px;
  font-family: 'Press Start 2P', monospace;
  font-size: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.header-title h1 {
  font-family: 'Press Start 2P', monospace;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: #ffffff;
  text-shadow: 0 0 10px var(--neon-cyan), 0 0 20px var(--neon-cyan);
}

/* ============================================
   Main Layout
   ============================================ */

.main {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 3rem;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  min-height: calc(100vh - 100px);
}

.demo-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding-top: 1rem;
}

/* ============================================
   Mixer Panel
   ============================================ */

.mixer-panel {
  display: flex;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.mixer-channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  min-width: 50px;
  transition: all 0.3s ease;
}

.mixer-channel.active {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.channel-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.4rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.channel-meter {
  width: 20px;
  height: 80px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.meter-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: linear-gradient(to top, var(--neon-cyan), var(--neon-pink));
  transition: height 0.15s ease-out;
  border-radius: 0 0 3px 3px;
}

.meter-glow {
  position: absolute;
  bottom: 0;
  left: -50%;
  right: -50%;
  height: 0%;
  background: linear-gradient(to top, var(--neon-cyan), transparent);
  filter: blur(8px);
  opacity: 0.5;
  transition: height 0.15s ease-out;
}

/* Pan meter special style */
.pan-meter {
  position: relative;
}

.pan-meter .meter-center {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-50%);
}

.pan-fill {
  top: 50%;
  bottom: auto;
  height: 0%;
  transform-origin: top center;
  background: var(--cube-yellow);
}

.channel-value {
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 2ch;
  text-align: center;
}

.channel-color {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  box-shadow: 0 0 10px currentColor;
}

/* ============================================
   Cube Stage
   ============================================ */

.cube-stage {
  position: relative;
  width: 350px;
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cube-glow {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(0, 240, 255, 0.2) 0%,
    rgba(178, 77, 255, 0.15) 40%,
    transparent 70%
  );
  filter: blur(40px);
  animation: glowPulse 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes glowPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.6;
  }
  50% {
    transform: scale(1.15);
    opacity: 0.8;
  }
}

/* ============================================
   3D Scene & Cube
   ============================================ */

.scene {
  width: var(--cube-size);
  height: var(--cube-size);
  perspective: 600px;
  perspective-origin: 50% 50%;
}

.cube {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(-25deg) rotateY(-35deg);
  transition: transform 0.1s ease-out;
  cursor: grab;
}

.cube:active {
  cursor: grabbing;
}

.cube.animating {
  transition: none;
}

/* Individual cubie (small cube) */
.cubie {
  position: absolute;
  width: var(--cubie-size);
  height: var(--cubie-size);
  transform-style: preserve-3d;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cubie.rotating {
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.cubie-face {
  position: absolute;
  width: calc(var(--cubie-size) - var(--cubie-gap) * 2);
  height: calc(var(--cubie-size) - var(--cubie-gap) * 2);
  margin: var(--cubie-gap);
  border-radius: 6px;
  background: #1a1a1a;
  backface-visibility: hidden;
  border: 1px solid rgba(0, 0, 0, 0.5);
}

/* Face colors */
.cubie-face.front { background: var(--cube-red); }
.cubie-face.back { background: var(--cube-orange); }
.cubie-face.right { background: var(--cube-blue); }
.cubie-face.left { background: var(--cube-green); }
.cubie-face.top { background: var(--cube-white); }
.cubie-face.bottom { background: var(--cube-yellow); }

/* Face transforms */
.cubie-face.front { transform: translateZ(calc(var(--cubie-size) / 2)); }
.cubie-face.back { transform: rotateY(180deg) translateZ(calc(var(--cubie-size) / 2)); }
.cubie-face.right { transform: rotateY(90deg) translateZ(calc(var(--cubie-size) / 2)); }
.cubie-face.left { transform: rotateY(-90deg) translateZ(calc(var(--cubie-size) / 2)); }
.cubie-face.top { transform: rotateX(90deg) translateZ(calc(var(--cubie-size) / 2)); }
.cubie-face.bottom { transform: rotateX(-90deg) translateZ(calc(var(--cubie-size) / 2)); }

/* Colored faces have shine effect */
.cubie-face:not(.inner)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.35),
    transparent
  );
  border-radius: 4px 4px 0 0;
}

/* Hover effect on faces */
.cubie-face:hover {
  filter: brightness(1.1);
  cursor: pointer;
}

/* Active face (being dragged) */
.cubie-face.active {
  filter: brightness(1.3);
  box-shadow: 0 0 25px currentColor;
  transition: filter 0.1s ease, box-shadow 0.1s ease;
}

/* Inner faces (black) */
.cubie-face.inner {
  background: #0a0a0a;
}

/* ============================================
   Rotation Hint
   ============================================ */

.rotation-hint {
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-family: 'Press Start 2P', monospace;
  font-size: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.rotation-hint.visible {
  opacity: 1;
}

.hint-face {
  color: var(--neon-cyan);
}

.hint-direction {
  color: var(--text-secondary);
}

/* ============================================
   Control Info
   ============================================ */

.control-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2rem;
  margin-top: 1rem;
  padding: 1rem 1.5rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
}

.control-hint {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.control-hint kbd {
  padding: 0.25rem 0.5rem;
  background: linear-gradient(180deg, #2a2a3a, #1a1a2a);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  font-family: 'Press Start 2P', monospace;
  font-size: 0.45rem;
  color: var(--neon-cyan);
  box-shadow:
    0 2px 0 #0a0a1a,
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ============================================
   Active Display (Side Panel)
   ============================================ */

.active-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  min-width: 200px;
  margin-top: 3rem;
  height: fit-content;
}

.active-face {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.face-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.face-icon.front { background: var(--cube-red); box-shadow: 0 0 20px var(--cube-red); }
.face-icon.back { background: var(--cube-orange); box-shadow: 0 0 20px var(--cube-orange); }
.face-icon.right { background: var(--cube-blue); box-shadow: 0 0 20px var(--cube-blue); }
.face-icon.left { background: var(--cube-green); box-shadow: 0 0 20px var(--cube-green); }
.face-icon.top { background: var(--cube-white); box-shadow: 0 0 20px rgba(255,255,255,0.5); }
.face-icon.bottom { background: var(--cube-yellow); box-shadow: 0 0 20px var(--cube-yellow); }

.face-name {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.6rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

.active-value-ring {
  position: relative;
  width: 120px;
  height: 120px;
}

.active-value-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 8;
}

.ring-fill {
  fill: none;
  stroke: var(--neon-cyan);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  transition: stroke-dashoffset 0.2s ease-out, stroke 0.3s ease;
  filter: drop-shadow(0 0 6px var(--neon-cyan));
}

.active-value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: 'Rajdhani', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.active-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.5rem;
  color: var(--neon-pink);
  text-align: center;
  letter-spacing: 0.05em;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 900px) {
  .main {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
  }

  .active-display {
    flex-direction: row;
    width: 100%;
    max-width: 500px;
    justify-content: space-around;
    margin-top: 0;
  }

  .active-value-ring {
    width: 80px;
    height: 80px;
  }

  .active-value {
    font-size: 1.5rem;
  }
}

@media (max-width: 640px) {
  :root {
    --cube-size: 160px;
  }

  .header {
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
  }

  .header-title h1 {
    font-size: 0.75rem;
  }

  .mixer-panel {
    flex-wrap: wrap;
    justify-content: center;
  }

  .channel-meter {
    height: 60px;
  }

  .control-info {
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
  }

  .active-display {
    flex-direction: column;
    padding: 1rem;
  }
}

/* Small mobile (480px) */
@media (max-width: 480px) {
  :root {
    --cube-size: 140px;
    --cubie-gap: 2px;
  }

  .main {
    padding: 1rem;
    gap: 1.5rem;
  }

  .mixer-panel {
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .mixer-channel {
    min-width: 40px;
    padding: 0.25rem;
  }

  .channel-label {
    font-size: 0.35rem;
  }

  .channel-meter {
    width: 16px;
    height: 50px;
  }

  .channel-value {
    font-size: 0.75rem;
  }

  .channel-color {
    width: 10px;
    height: 10px;
  }

  .cube-stage {
    width: 280px;
    height: 280px;
  }

  .cube-glow {
    width: 180px;
    height: 180px;
  }

  .cubie-face {
    border-radius: 4px;
  }

  .control-info {
    padding: 0.75rem 1rem;
    gap: 0.4rem;
  }

  .control-hint {
    font-size: 0.65rem;
  }

  .control-hint kbd {
    padding: 0.2rem 0.4rem;
    font-size: 0.4rem;
  }

  .active-display {
    min-width: unset;
    width: 100%;
    padding: 0.75rem;
    gap: 1rem;
  }

  .active-value-ring {
    width: 70px;
    height: 70px;
  }

  .active-value {
    font-size: 1.25rem;
  }

  .face-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
  }

  .face-name {
    font-size: 0.5rem;
  }

  .active-label {
    font-size: 0.4rem;
  }

  /* Reduce grid floor complexity on small screens */
  .grid-floor {
    background:
      linear-gradient(to bottom, transparent 0%, var(--bg-deep) 100%),
      repeating-linear-gradient(
        to right,
        transparent,
        transparent 40px,
        rgba(0, 240, 255, 0.02) 40px,
        rgba(0, 240, 255, 0.02) 41px
      );
  }

  /* Lighter scanlines effect */
  .scanlines {
    opacity: 0.25;
  }
}

/* Extra small screens (iPhone SE, 375px) */
@media (max-width: 375px) {
  :root {
    --cube-size: 120px;
    --cubie-gap: 2px;
  }

  .header {
    padding: 0.75rem;
    gap: 0.75rem;
  }

  .back-link {
    font-size: 0.75rem;
  }

  .tag {
    padding: 0.2rem 0.5rem;
    font-size: 0.4rem;
  }

  .header-title h1 {
    font-size: 0.65rem;
  }

  .main {
    padding: 0.75rem;
    gap: 1rem;
    min-height: auto;
  }

  .demo-section {
    gap: 1rem;
    padding-top: 0.5rem;
  }

  .mixer-panel {
    padding: 0.5rem 0.75rem;
    gap: 0.25rem;
    border-radius: 8px;
  }

  .mixer-channel {
    min-width: 36px;
    padding: 0.2rem;
    gap: 0.25rem;
  }

  .channel-label {
    font-size: 0.3rem;
  }

  .channel-meter {
    width: 14px;
    height: 40px;
    border-radius: 3px;
  }

  .channel-value {
    font-size: 0.65rem;
  }

  .channel-color {
    width: 8px;
    height: 8px;
  }

  .cube-stage {
    width: 220px;
    height: 220px;
  }

  .cube-glow {
    width: 140px;
    height: 140px;
    filter: blur(30px);
  }

  .cubie-face {
    border-radius: 3px;
  }

  .rotation-hint {
    font-size: 0.4rem;
    padding: 0.4rem 0.75rem;
    gap: 0.4rem;
  }

  .control-info {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    margin-top: 0.5rem;
  }

  .control-hint {
    font-size: 0.6rem;
    gap: 0.35rem;
  }

  .control-hint kbd {
    padding: 0.15rem 0.35rem;
    font-size: 0.35rem;
    border-radius: 3px;
  }

  .active-display {
    padding: 0.5rem;
    gap: 0.75rem;
    border-radius: 12px;
    margin-top: 1rem;
  }

  .active-face {
    gap: 0.35rem;
  }

  .face-icon {
    width: 28px;
    height: 28px;
    border-radius: 5px;
  }

  .face-name {
    font-size: 0.45rem;
  }

  .active-value-ring {
    width: 60px;
    height: 60px;
  }

  .ring-bg,
  .ring-fill {
    stroke-width: 6;
  }

  .active-value {
    font-size: 1rem;
  }

  .active-label {
    font-size: 0.35rem;
  }

  /* Disable scanlines on very small screens for performance */
  .scanlines {
    display: none;
  }

  /* Simplified vignette */
  .vignette {
    background: radial-gradient(
      ellipse at center,
      transparent 0%,
      transparent 60%,
      rgba(0, 0, 0, 0.6) 100%
    );
  }
}

/* Touch device improvements */
@media (hover: none) and (pointer: coarse) {
  .cubie-face:active {
    filter: brightness(1.2);
    transform: scale(0.98);
  }

  .back-link {
    padding: 0.5rem;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .mixer-channel {
    min-width: 44px;
  }

  .control-hint kbd {
    min-width: 32px;
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .cube,
  .cubie,
  .cubie-face,
  .meter-fill,
  .meter-glow,
  .ring-fill,
  .face-icon {
    transition: none !important;
  }

  .cube-glow {
    animation: none;
  }

  .cubie-face.flash {
    animation: none;
  }
}

/* ============================================
   Animations
   ============================================ */

@keyframes faceFlash {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.5); }
}

.cubie-face.flash {
  animation: faceFlash 0.3s ease;
}