/* ============================================
   DR-X808 DRUM MACHINE — STYLES
   Volcanic Glass × Industrial Retro-Futuristic
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

/* ── CSS Variables ── */
:root {
  --bg-deep:       #0d0d0d;
  --bg-machine:    #161616;
  --bg-panel:      #1e1e1e;
  --bg-inset:      #111111;
  --border:        #2a2a2a;
  --border-bright: #3a3a3a;
  --text-primary:  #e8e0d0;
  --text-dim:      #6a6460;
  --text-label:    #4a4440;

  --orange:        #FF6B2B;
  --orange-dim:    #7a3010;
  --orange-glow:   rgba(255, 107, 43, 0.35);
  --amber:         #FFB088;

  /* Per-pad colors */
  --pad-0: #FF6B2B; /* kick    — orange */
  --pad-1: #FF3CAC; /* snare   — pink */
  --pad-2: #00E5FF; /* hihat-c — cyan */
  --pad-3: #00BCD4; /* hihat-o — teal */
  --pad-4: #CCFF00; /* clap    — acid */
  --pad-5: #FF9800; /* tom     — amber */
  --pad-6: #E040FB; /* rim     — purple */
  --pad-7: #FFD600; /* cowbell — gold */

  --font-mono: 'Space Mono', monospace;
  --radius-sm: 3px;
  --radius-md: 6px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
button { cursor: pointer; font-family: var(--font-mono); border: none; background: none; }
input[type=range] { cursor: pointer; }

/* ── Body ── */
html, body {
  min-height: 100vh;
  background: var(--bg-deep);
  font-family: var(--font-mono);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

/* ── CRT Effects ── */
.crt-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 1000;
  background: radial-gradient(ellipse at center,
    transparent 60%,
    rgba(0,0,0,0.55) 100%);
}
.scanlines {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
}

/* ── Machine Shell ── */
.machine {
  width: min(960px, 98vw);
  background: var(--bg-machine);
  border: 1px solid var(--border-bright);
  border-radius: 10px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  box-shadow:
    0 0 0 1px #000,
    0 0 40px rgba(0,0,0,0.8),
    inset 0 1px 0 rgba(255,255,255,0.04);
  position: relative;
  margin: 24px auto;
}

/* ── Section Label ── */
.section-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--text-label);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}
.seq-steps-label {
  color: var(--orange-dim);
  font-size: 8px;
}

/* ── Header ── */
.machine-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  gap: 16px;
}

.brand-logo {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}
.brand-dr  { color: var(--text-primary); }
.brand-x   { color: var(--orange); }
.brand-808 { color: var(--text-dim); font-size: 20px; }
.brand-sub {
  font-size: 7px;
  letter-spacing: 0.25em;
  color: var(--text-label);
  margin-top: 3px;
}

.header-indicators {
  display: flex;
  gap: 8px;
  align-items: center;
}
.indicator {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #1a1a1a;
  border: 1px solid #2a2a2a;
  transition: background 0.1s, box-shadow 0.1s;
}
#power-led  { background: #00ff88; box-shadow: 0 0 6px #00ff88; }
#beat-led   { background: var(--orange); }
#rec-led    { background: #1a1a1a; }
#beat-led.active { box-shadow: 0 0 8px var(--orange); }

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

.header-display {
  display: flex;
  gap: 12px;
}
.display-screen {
  background: #0a0a0a;
  border: 1px solid #222;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  text-align: center;
  min-width: 64px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}
.display-label {
  display: block;
  font-size: 7px;
  letter-spacing: 0.2em;
  color: var(--text-label);
  margin-bottom: 2px;
}
.display-value {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--orange);
  text-shadow: 0 0 10px var(--orange-glow);
  letter-spacing: 0.05em;
  line-height: 1;
}

/* ── Pads ── */
.pads-section { }
.pads-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
}

.pad-wrapper { position: relative; }

.pad {
  position: relative;
  aspect-ratio: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.06s ease, border-color 0.1s;
  user-select: none;
  -webkit-user-select: none;
}
.pad::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.03) 0%, transparent 60%);
  pointer-events: none;
}

.pad-inner {
  position: relative; z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 3px;
  padding: 8px 4px;
}
.pad-icon {
  font-size: 18px;
  line-height: 1;
  transition: color 0.1s;
}
.pad-name {
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  transition: color 0.1s;
}
.pad-sub {
  font-size: 6px;
  letter-spacing: 0.15em;
  color: var(--text-label);
}

.pad-glow {
  position: absolute; inset: 0; z-index: 1;
  opacity: 0;
  transition: opacity 0.15s;
  border-radius: var(--radius-md);
}

/* Per-pad color theming */
.pad[data-index="0"] { --c: var(--pad-0); }
.pad[data-index="1"] { --c: var(--pad-1); }
.pad[data-index="2"] { --c: var(--pad-2); }
.pad[data-index="3"] { --c: var(--pad-3); }
.pad[data-index="4"] { --c: var(--pad-4); }
.pad[data-index="5"] { --c: var(--pad-5); }
.pad[data-index="6"] { --c: var(--pad-6); }
.pad[data-index="7"] { --c: var(--pad-7); }

.pad .pad-icon { color: var(--c); }
.pad .pad-glow { background: radial-gradient(circle at center, var(--c) 0%, transparent 70%); }

.pad:hover {
  border-color: var(--c);
  transform: translateY(-1px);
}
.pad:hover .pad-name { color: var(--c); }

.pad.active {
  border-color: var(--c);
  transform: scale(0.94);
  box-shadow: 0 0 16px color-mix(in srgb, var(--c) 50%, transparent);
}
.pad.active .pad-glow { opacity: 0.25; }
.pad.active .pad-name { color: var(--c); }

/* ── Sequencer ── */
.sequencer-section { }

.sequencer-grid {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.seq-row {
  display: grid;
  grid-template-columns: 52px repeat(16, 1fr);
  gap: 4px;
  align-items: center;
}

.seq-row-label {
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-align: right;
  padding-right: 8px;
  white-space: nowrap;
}

.seq-btn {
  height: 22px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.08s, border-color 0.08s, box-shadow 0.08s;
  position: relative;
  overflow: hidden;
}
.seq-btn::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--row-color, var(--orange));
  opacity: 0;
  transition: opacity 0.08s;
}
.seq-btn:hover { border-color: var(--border-bright); }
.seq-btn.on {
  background: color-mix(in srgb, var(--row-color, var(--orange)) 20%, var(--bg-inset));
  border-color: var(--row-color, var(--orange));
  box-shadow: 0 0 6px color-mix(in srgb, var(--row-color, var(--orange)) 40%, transparent);
}
.seq-btn.on::after { opacity: 0.5; }

.seq-btn.playing {
  background: var(--row-color, var(--orange)) !important;
  border-color: var(--row-color, var(--orange)) !important;
  box-shadow: 0 0 12px var(--row-color, var(--orange)) !important;
}
.seq-btn.playing::after { opacity: 1; }

/* Beat group dividers (every 4 steps) */
.seq-btn:nth-child(5n+2),
.seq-btn:nth-child(5n+6),
.seq-btn:nth-child(5n+10),
.seq-btn:nth-child(5n+14) {
  margin-left: 3px;
}

/* ── Controls Section ── */
.controls-section {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
  padding: 16px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

/* Transport */
.transport-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.transport-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 7px;
  letter-spacing: 0.15em;
  transition: all 0.1s;
  min-width: 52px;
}
.transport-btn svg {
  width: 14px; height: 14px;
}
.transport-btn:hover {
  border-color: var(--orange);
  color: var(--orange);
  box-shadow: 0 0 8px var(--orange-glow);
}
.transport-btn:active { transform: scale(0.95); }

#btn-play.playing {
  background: color-mix(in srgb, var(--orange) 15%, var(--bg-panel));
  border-color: var(--orange);
  color: var(--orange);
  box-shadow: 0 0 12px var(--orange-glow);
}
#btn-stop:hover { border-color: #ff4444; color: #ff4444; box-shadow: 0 0 8px rgba(255,68,68,0.3); }
#btn-clear:hover { border-color: #888; color: #888; }

/* Tempo */
.controls-center { display: flex; flex-direction: column; }
.knob-group { display: flex; flex-direction: column; gap: 8px; align-items: center; }
.knob-container { width: 100%; }
.knob-track { width: 100%; }
.knob-labels {
  display: flex;
  justify-content: space-between;
  font-size: 7px;
  color: var(--text-label);
  margin-top: 4px;
  padding: 0 2px;
}

/* Range input — horizontal (tempo) */
input[type=range].knob-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-panel);
  border-radius: 2px;
  outline: none;
  border: 1px solid var(--border);
}
input[type=range].knob-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--orange);
  border: 2px solid var(--bg-deep);
  box-shadow: 0 0 8px var(--orange-glow);
  cursor: pointer;
  transition: box-shadow 0.1s;
}
input[type=range].knob-input::-webkit-slider-thumb:hover {
  box-shadow: 0 0 14px var(--orange);
}
input[type=range].knob-input::-moz-range-thumb {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--orange);
  border: 2px solid var(--bg-deep);
  box-shadow: 0 0 8px var(--orange-glow);
  cursor: pointer;
}

.tap-btn-wrap { display: flex; justify-content: center; }
.tap-btn {
  padding: 6px 20px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 8px;
  letter-spacing: 0.2em;
  transition: all 0.1s;
}
.tap-btn:hover { border-color: var(--orange); color: var(--orange); }
.tap-btn:active {
  background: color-mix(in srgb, var(--orange) 20%, var(--bg-panel));
  border-color: var(--orange);
  color: var(--orange);
  transform: scale(0.96);
}

/* Mixer faders */
.controls-right { display: flex; flex-direction: column; }
.mixer-group { display: flex; gap: 20px; justify-content: center; align-items: flex-end; }
.fader-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.fader-label {
  font-size: 7px;
  letter-spacing: 0.15em;
  color: var(--text-label);
}
.fader-track {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fader-value {
  font-size: 9px;
  color: var(--orange);
  min-width: 24px;
  text-align: center;
}

/* Vertical range input */
input[type=range].fader-input.vertical {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  writing-mode: vertical-lr;
  direction: rtl;
  width: 4px;
  height: 80px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type=range].fader-input.vertical::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 10px;
  border-radius: 2px;
  background: var(--text-primary);
  border: 1px solid var(--border-bright);
  box-shadow: 0 0 4px rgba(0,0,0,0.5);
  cursor: pointer;
}
input[type=range].fader-input.vertical::-moz-range-thumb {
  width: 18px; height: 10px;
  border-radius: 2px;
  background: var(--text-primary);
  border: 1px solid var(--border-bright);
  cursor: pointer;
}

/* ── Presets ── */
.presets-section { }
.presets-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.preset-btn {
  padding: 5px 12px;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: all 0.1s;
}
.preset-btn:hover { border-color: var(--orange); color: var(--orange); }
.preset-btn.active {
  background: color-mix(in srgb, var(--orange) 15%, var(--bg-inset));
  border-color: var(--orange);
  color: var(--orange);
  box-shadow: 0 0 8px var(--orange-glow);
}

.preset-actions { margin-left: auto; display: flex; gap: 6px; }
.preset-action-btn {
  padding: 5px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 8px;
  letter-spacing: 0.15em;
  transition: all 0.1s;
}
.preset-action-btn:hover { border-color: var(--amber); color: var(--amber); }

/* ── Responsive ── */
@media (max-width: 700px) {
  .machine { padding: 14px; gap: 14px; }
  .pads-grid { grid-template-columns: repeat(4, 1fr); }
  .controls-section { grid-template-columns: 1fr; }
  .machine-header { flex-wrap: wrap; gap: 10px; }
  .header-display { gap: 6px; }
  .display-screen { min-width: 50px; padding: 4px 8px; }
  .display-value { font-size: 16px; }
  .brand-logo { font-size: 22px; }
}

@media (max-width: 480px) {
  .pads-grid { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .seq-row { grid-template-columns: 40px repeat(16, 1fr); gap: 2px; }
  .seq-btn { height: 18px; }
}