/* FREQ-SYNK Punch-Card Piano styles */
:root {
  --bg: #0a0f1a;
  --panel: rgba(20, 28, 45, 0.9);
  --panel-strong: rgba(30, 40, 60, 0.95);
  --border: rgba(255, 255, 255, 0.08);
  --accent: #7dd3fc;
  --accent-2: #a78bfa;
  --text: #e8eefc;
  --muted: rgba(232, 238, 252, 0.65);
  --card: rgba(255, 255, 255, 0.02);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --gap: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(125, 211, 252, 0.08), transparent 28%),
              radial-gradient(circle at 80% 10%, rgba(167, 139, 250, 0.08), transparent 28%),
              radial-gradient(circle at 50% 80%, rgba(255, 158, 128, 0.08), transparent 32%),
              var(--bg);
  color: var(--text);
  padding: 20px;
}

.page {
  max-width: 1280px;
  margin: 0 auto 80px;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.hero {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 20px 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
}

.title {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.title h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
  letter-spacing: -0.01em;
}

.title p {
  margin: 0;
  color: var(--muted);
  font-weight: 500;
}

.badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.pill {
  background: rgba(125, 211, 252, 0.12);
  color: #cdeaff;
  border: 1px solid rgba(125, 211, 252, 0.35);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.pill.secondary {
  background: rgba(167, 139, 250, 0.12);
  color: #ede9fe;
  border-color: rgba(167, 139, 250, 0.35);
}

.controls {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  box-shadow: var(--shadow);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-group label {
  font-size: 0.95rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-group input[type="range"] {
  width: 100%;
}

.control-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

button,
input,
select {
  font: inherit;
}

button {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  transition: transform 0.08s ease, border-color 0.2s ease, background 0.2s ease;
}

button:hover {
  border-color: rgba(125, 211, 252, 0.6);
  background: rgba(125, 211, 252, 0.08);
}

button:active {
  transform: translateY(1px);
}

.primary {
  background: linear-gradient(120deg, rgba(125, 211, 252, 0.2), rgba(167, 139, 250, 0.2));
  border-color: rgba(125, 211, 252, 0.6);
}

.danger {
  border-color: rgba(248, 113, 113, 0.5);
  color: #fecdd3;
}

.surface {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.layout {
  display: grid;
  gap: 14px;
  grid-template-columns: 1.35fr 1fr;
}

.canvas-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.grid-canvas,
.playback-overlay {
  display: block;
  width: 100%;
  height: 420px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.05), transparent 40%),
              rgba(10, 15, 26, 0.9);
}

.playback-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.legend {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: center;
}

.legend-bars {
  width: 100%;
  height: 30px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.legend-row {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.85rem;
}

.visuals {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.visuals canvas {
  width: 100%;
  height: 180px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.spectrogram {
  height: 180px;
}

.card-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.hint {
  font-size: 0.9rem;
  color: var(--muted);
}

.pill + .hint {
  margin-left: 6px;
}

.cards-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.card-chip {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
}

.muted {
  color: var(--muted);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

.modal.open {
  display: flex;
}

.modal-content {
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  max-width: 640px;
  width: calc(100% - 40px);
  box-shadow: var(--shadow);
}

.modal-content h3 {
  margin-top: 0;
}

.modal-content ul {
  color: var(--muted);
  padding-left: 18px;
  line-height: 1.6;
}

.help-close {
  float: right;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .grid-canvas,
  .playback-overlay {
    height: 360px;
  }
}

@media (max-width: 700px) {
  body {
    padding: 12px;
  }
  .hero {
    padding: 14px;
  }
  .controls {
    grid-template-columns: 1fr;
  }
  .grid-canvas,
  .playback-overlay {
    height: 300px;
  }
}