/* style.css — Robot Dance Party */

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

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --border: #2a2a3a;
  --text: #e0e0e8;
  --muted: #888898;
  --accent: #6c5ce7;
  --accent-hover: #7c6cf7;
  --danger: #e74c3c;
  --success: #2ecc71;
  --radius: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Shared */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); }
.btn-danger:hover { border-color: var(--danger); color: var(--danger); }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.field input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.field input:focus { border-color: var(--accent); }

.error-msg { color: var(--danger); font-size: 13px; margin-top: 12px; display: none; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card h3 {
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

/* ==================== CONNECT ==================== */
#screen-connect {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.connect-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
}

.connect-card h1 { font-size: 28px; margin-bottom: 4px; }
.connect-card .subtitle { color: var(--muted); font-size: 14px; margin-bottom: 28px; }
.connect-card .btn-primary { width: 100%; margin-top: 8px; }

/* ==================== DANCE SCREEN ==================== */
#screen-dance { display: none; min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 12px; }

.status-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--success); }
.status-dot.offline { background: var(--danger); }

.topbar h2 { font-size: 16px; }
.host-label { color: var(--muted); font-size: 12px; }

.main-content { max-width: 1100px; margin: 0 auto; padding: 20px; }

/* ==================== MUSIC SOURCE ==================== */
.music-section { margin-bottom: 20px; }

.source-tabs { display: flex; gap: 4px; margin-bottom: 16px; }

.source-tab {
  flex: 1;
  padding: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s;
}
.source-tab:hover { border-color: var(--accent); }
.source-tab.active { background: var(--accent); color: white; border-color: var(--accent); }

.source-panel { display: none; }
.source-panel.active { display: block; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s;
}
.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(108, 92, 231, 0.05);
}
.drop-zone input[type=file] { display: none; }

.now-playing {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg);
  border-radius: 8px;
  margin-top: 12px;
}
.now-playing.active { display: flex; }

.track-name {
  flex: 1;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-time { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }

.transport-btns { display: flex; gap: 6px; }

.btn-transport {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.btn-transport:hover { border-color: var(--accent); }

/* ==================== YOUTUBE ==================== */
.yt-input-row { display: flex; gap: 8px; margin-bottom: 12px; }
.yt-input-row input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.yt-input-row input:focus { border-color: var(--accent); }
.yt-hint { font-size: 12px; color: var(--muted); margin-top: 8px; }

/* ==================== VISUALIZER ==================== */
.visualizer-wrap {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  height: 220px;
}

.visualizer-wrap canvas { width: 100%; height: 100%; display: block; }

.beat-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: var(--border);
  color: var(--muted);
  transition: all 0.1s;
}
.beat-indicator.beat { background: var(--accent); color: white; }

.bpm-display {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 13px;
  color: var(--muted);
}
.bpm-display span { font-size: 28px; font-weight: 700; color: var(--text); }

/* ==================== CONTROLS ==================== */
.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.dance-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.dance-toggle:last-child { border-bottom: none; }

.toggle-label { font-size: 14px; }
.toggle-sub { font-size: 12px; color: var(--muted); }

.switch {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
  border: none;
  flex-shrink: 0;
}
.switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}
.switch.on { background: var(--accent); }
.switch.on::after { transform: translateX(20px); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.slider-row:last-child { border-bottom: none; }
.slider-row label { font-size: 13px; color: var(--muted); min-width: 90px; }
.slider-row input[type=range] { flex: 1; accent-color: var(--accent); }
.slider-row .val { font-size: 13px; color: var(--muted); min-width: 30px; text-align: right; }

/* ==================== ACTIVITY LOG ==================== */
.robot-log {
  max-height: 180px;
  overflow-y: auto;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 11px;
  line-height: 1.7;
  color: var(--muted);
  padding: 4px 0;
}
.robot-log .log-beat { color: var(--accent); }
.robot-log .log-led { color: var(--success); }
.robot-log .log-servo { color: #f39c12; }
.robot-log .log-emotion { color: #e74c3c; }
.robot-log .log-energy { color: #1abc9c; font-weight: 600; }

/* ==================== TOAST ==================== */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 20px;
  font-size: 14px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  z-index: 100;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.error { border-color: var(--danger); }