/* =============================================================
   iPod — Web Edition
   Classic 4th-gen "Click Wheel" iPod aesthetic (pre-color).
   Monochrome LCD, white plastic body, chrome wheel ring.
   ============================================================= */

:root {
  /* Body — classic white plastic */
  --body-light:   #fdfdfd;
  --body-mid:     #f4f4f4;
  --body-dark:    #d8d8d8;
  --body-shadow:  #8a8a8a;
  --body-edge:    #9a9a9a;

  /* Chrome accents */
  --chrome-light: #f4f4f4;
  --chrome-mid:   #c8c8c8;
  --chrome-dark:  #6e6e6e;
  --chrome-edge:  #2a2a2a;

  /* Wheel plastic (slightly cooler than body) */
  --wheel-light:  #ededed;
  --wheel-mid:    #dcdcdc;
  --wheel-dark:   #c0c0c0;
  --wheel-text:   #6a6a6a;

  /* Backdrop */
  --bg-top: #2a2f3a;
  --bg-bot: #15171c;

  /* Monochrome LCD (backlit, classic dark-blue) */
  --lcd-bg:        #1a3a5e;
  --lcd-bg-deep:   #0f2540;
  --lcd-bg-hi:     #2b5586;
  --lcd-fg:        #f0f0f0;
  --lcd-fg-dim:    #a9bcd0;
  --lcd-rule:      #4a6c95;
  --lcd-rule-soft: #2f507a;

  /* Type */
  --font-ui:  'Inter', -apple-system, system-ui, sans-serif;
  --font-lcd: 'Chicago', 'Geneva', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: radial-gradient(ellipse at 50% 40%, var(--bg-top), var(--bg-bot) 75%);
  color: #ddd;
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* =============================================================
   DESKTOP
   ============================================================= */
.desktop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
}

.desktop-hint {
  position: fixed;
  top: 24px;
  left: 0;
  right: 0;
  text-align: center;
  color: #aab;
  font-size: 12px;
  letter-spacing: 0.04em;
  display: flex;
  flex-direction: column;
  gap: 6px;
  pointer-events: none;
  opacity: 0.9;
}

.kbd-hint {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 11px;
  color: #889;
}

/* =============================================================
   iPOD HARDWARE
   Classic 4th-gen proportions: ~60.9 x 102.4 mm body.
   ============================================================= */
.ipod {
  --w: 300px;
  width: var(--w);
  height: 500px;
  background:
    linear-gradient(
      180deg,
      var(--body-light) 0%,
      var(--body-mid)   35%,
      var(--body-mid)   82%,
      var(--body-dark)  100%
    );
  border-radius: 10px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -1px 0 rgba(0, 0, 0, 0.22),
    inset 1px 0 0 rgba(255, 255, 255, 0.5),
    inset -1px 0 0 rgba(0, 0, 0, 0.05),
    0 22px 40px rgba(0, 0, 0, 0.6),
    0 4px 8px rgba(0, 0, 0, 0.4);
  padding: 16px 14px;
  position: relative;
  z-index: 1;
}

/* Subtle vertical seam line down the body sides (plastic mould) */
.ipod::before,
.ipod::after {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(0,0,0,0) 0%,
    rgba(0,0,0,0.05) 30%,
    rgba(0,0,0,0.05) 70%,
    rgba(0,0,0,0) 100%
  );
  pointer-events: none;
}
.ipod::before { left: 2px; }
.ipod::after  { right: 2px; }

/* Top half (screen housing) */
.ipod-top {
  height: 56%;
  display: grid;
  place-items: center;
  padding: 4px;
}

.ipod-bezel {
  width: 92%;
  height: 90%;
  background:
    linear-gradient(
      180deg,
      var(--chrome-light) 0%,
      var(--chrome-mid)  50%,
      var(--chrome-dark) 100%
    );
  border-radius: 4px;
  padding: 5px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    inset 0 -1px 0 rgba(0, 0, 0, 0.55),
    0 1px 1px rgba(0, 0, 0, 0.4);
}

.ipod-screen {
  width: 100%;
  height: 100%;
  background: var(--lcd-bg);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  box-shadow:
    inset 0 0 14px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(0, 0, 0, 0.4);
}

.screen-stage {
  width: 100%;
  height: 100%;
  position: relative;
  /* Subtle scanline overlay for the LCD */
  background-image: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.06) 0px,
    rgba(0, 0, 0, 0.06) 1px,
    transparent 1px,
    transparent 3px
  );
  pointer-events: none;
}

#screen-canvas {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  position: relative;
  z-index: 1;
}

/* Bottom half (click wheel) */
.ipod-bottom {
  height: 44%;
  display: grid;
  place-items: center;
  padding-top: 6px;
}

.ipod-wheel {
  --wheel-size: 210px;
  position: relative;
  width: var(--wheel-size);
  height: var(--wheel-size);
  border-radius: 50%;
  background:
    radial-gradient(
      circle at 50% 50%,
      var(--wheel-light) 0%,
      var(--wheel-mid)   55%,
      var(--wheel-dark)  100%
    );
  box-shadow:
    inset 0 2px 2px rgba(255, 255, 255, 0.85),
    inset 0 -2px 2px rgba(0, 0, 0, 0.15),
    inset 0 0 0 1px rgba(255, 255, 255, 0.4),
    0 1px 2px rgba(0, 0, 0, 0.25);
}

/* Chrome accent ring around the wheel */
.ipod-wheel::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: linear-gradient(
    180deg,
    var(--chrome-light) 0%,
    var(--chrome-mid)  50%,
    var(--chrome-dark) 100%
  );
  z-index: -1;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.6),
    inset 0 -1px 0 rgba(0,0,0,0.5),
    0 1px 2px rgba(0,0,0,0.3);
}

.wheel-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  cursor: grab;
  touch-action: none;
}

.wheel-ring.dragging { cursor: grabbing; }

.wheel-touch {
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

/* Center button */
.wheel-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 72px;
  height: 72px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: none;
  background:
    radial-gradient(
      circle at 35% 35%,
      #ffffff 0%,
      #f0f0f0 40%,
      #d6d6d6 100%
    );
  box-shadow:
    inset 0 2px 3px rgba(255, 255, 255, 0.9),
    inset 0 -2px 3px rgba(0, 0, 0, 0.18),
    inset 0 0 0 1px rgba(0, 0, 0, 0.05),
    0 1px 2px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  z-index: 4;
}

.wheel-center:active {
  box-shadow:
    inset 0 2px 4px rgba(0, 0, 0, 0.3),
    inset 0 -1px 2px rgba(255, 255, 255, 0.7);
  transform: translate(-50%, -50%) scale(0.97);
}

/* Wheel quadrant buttons (Menu / Prev / Next / Play) */
.wheel-btn {
  position: absolute;
  border: none;
  background: transparent;
  color: var(--wheel-text);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  z-index: 3;
  transition: color 0.12s ease;
  display: grid;
  place-items: center;
}

.wheel-btn:active { color: #333; }

.wheel-btn:focus-visible {
  outline: 2px solid #1a3a5e;
  outline-offset: 2px;
  border-radius: 6px;
}

/* MENU — top */
.wheel-menu {
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 78px;
  height: 32px;
  border-radius: 4px;
  font-size: 12px;
}
.wheel-menu:active { transform: translateX(-50%); }

/* PREV — left */
.wheel-prev {
  top: 50%;
  left: 8px;
  transform: translateY(-50%);
  width: 32px;
  height: 78px;
  font-size: 17px;
  border-radius: 4px;
}
.wheel-prev:active { transform: translateY(-50%); }

/* NEXT — right */
.wheel-next {
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
  width: 32px;
  height: 78px;
  font-size: 17px;
  border-radius: 4px;
}
.wheel-next:active { transform: translateY(-50%); }

/* PLAY/PAUSE — bottom */
.wheel-play {
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 78px;
  height: 32px;
  font-size: 17px;
  border-radius: 4px;
}
.wheel-play:active { transform: translateX(-50%); }

/* Soft cast shadow under the device */
.ipod-shadow {
  width: 240px;
  height: 14px;
  margin: 12px auto 0;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(0,0,0,0.45), rgba(0,0,0,0) 70%);
  filter: blur(2px);
  position: relative;
  z-index: 0;
}

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-height: 720px) {
  .ipod { --w: 270px; height: 450px; }
  .ipod-wheel { --wheel-size: 184px; }
  .wheel-center { width: 62px; height: 62px; }
  .wheel-menu, .wheel-play { width: 70px; height: 28px; }
  .wheel-prev, .wheel-next { width: 28px; height: 70px; }
}

@media (max-height: 600px) {
  .ipod { --w: 230px; height: 380px; }
  .ipod-wheel { --wheel-size: 156px; }
  .wheel-center { width: 52px; height: 52px; }
  .wheel-menu, .wheel-play { width: 60px; height: 24px; font-size: 11px; }
  .wheel-prev, .wheel-next { width: 24px; height: 60px; }
}
/* =============================================================
   MONOCHROME RESTYLE (2G–4G iPod look)
   Body ~61.8 x 103.5 mm, white polycarbonate front with a gloss
   sheen, mirror-chrome back edge, grayscale gray-green LCD.
   ============================================================= */
.ipod {
  --w: 300px;
  width: var(--w);
  height: calc(var(--w) * 1.675);
  border-radius: 26px;
  padding: 20px 20px 18px;
  background:
    linear-gradient(115deg, rgba(255,255,255,0) 30%, rgba(255,255,255,.55) 42%, rgba(255,255,255,0) 52%),
    linear-gradient(180deg, #ffffff 0%, #f7f7f5 45%, #eeeeec 100%);
  box-shadow:
    /* chrome back edge peeking around the white front */
    0 0 0 1px #c9c9c9,
    0 0 0 3px #f2f2f2,
    0 0 0 4px #8d8d8d,
    0 0 0 5px #e6e6e6,
    0 0 0 6px #6f6f6f,
    inset 0 2px 1px rgba(255,255,255,1),
    inset 0 -3px 6px rgba(0,0,0,.08),
    0 26px 48px rgba(0,0,0,.6),
    0 6px 12px rgba(0,0,0,.4);
}
.ipod::before, .ipod::after { display: none; }

.ipod-top { height: 47%; padding: 0; }
.ipod-bezel {
  width: 100%;
  height: 100%;
  padding: 9px;
  border-radius: 6px;
  background: linear-gradient(180deg, #2b2b2b, #1a1a1a);
  box-shadow:
    inset 0 2px 4px rgba(0,0,0,.8),
    inset 0 -1px 0 rgba(255,255,255,.12),
    0 1px 0 rgba(255,255,255,.9),
    0 -1px 0 rgba(0,0,0,.15);
}
.ipod-screen {
  background: #c4ccba;
  border-radius: 1px;
  box-shadow: inset 0 2px 6px rgba(0,0,0,.45), inset 0 0 0 1px rgba(0,0,0,.35);
}
.screen-stage {
  /* faint LCD pixel grid + recess shadow */
  background-image:
    repeating-linear-gradient(0deg, rgba(0,0,0,.035) 0 1px, transparent 1px 2px),
    repeating-linear-gradient(90deg, rgba(0,0,0,.035) 0 1px, transparent 1px 2px);
}
.screen-stage::after {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  box-shadow: inset 0 3px 6px rgba(0,0,0,.28), inset 0 0 12px rgba(0,0,0,.12);
}

.ipod-bottom { height: 53%; padding-top: 8px; }
.ipod-wheel {
  --wheel-size: 196px;
  background: radial-gradient(circle at 50% 35%, #fbfbfa 0%, #f1f1ef 60%, #e3e3e0 100%);
  box-shadow:
    inset 0 1px 1px rgba(255,255,255,1),
    inset 0 -2px 3px rgba(0,0,0,.10),
    0 0 0 1px rgba(0,0,0,.10),
    0 2px 4px rgba(0,0,0,.14),
    0 1px 0 rgba(255,255,255,.9);
}
.ipod-wheel::after { display: none; }
.wheel-btn { color: #a9a9a9; font-family: Helvetica, Arial, sans-serif; font-weight: 700; }
.wheel-btn:active { color: #6a6a6a; }
.wheel-menu { font-size: 13px; letter-spacing: .08em; top: 10px; }
.wheel-btn .glyph { font-size: 11px; letter-spacing: -2px; white-space: nowrap; }
.wheel-prev { left: 6px; } .wheel-next { right: 6px; } .wheel-play { bottom: 8px; }
.wheel-center {
  width: 74px; height: 74px;
  background: radial-gradient(circle at 50% 70%, #ffffff 0%, #f4f4f2 45%, #dedede 100%);
  box-shadow:
    inset 0 -2px 3px rgba(255,255,255,.9),
    inset 0 3px 5px rgba(0,0,0,.14),
    0 0 0 1px rgba(0,0,0,.10),
    0 1px 0 rgba(255,255,255,1);
}
.ipod-shadow { width: 260px; margin-top: 18px; }

@media (max-height: 820px) {
  .ipod { --w: 270px; border-radius: 24px; padding: 18px; }
  .ipod-wheel { --wheel-size: 176px; }
  .wheel-center { width: 66px; height: 66px; }
}
@media (max-height: 640px) {
  .ipod { --w: 220px; border-radius: 20px; padding: 14px; }
  .ipod-wheel { --wheel-size: 142px; }
  .wheel-center { width: 52px; height: 52px; }
}