/* ============================================
   JERRY OS - Guitar Practice Hub Styles
   ============================================ */

/* Guitar Page Layout */
.guitar-hub { padding: 24px; max-width: 1200px; margin: 0 auto; }
.guitar-hub h1 { font-family: var(--font-display); font-size: 28px; font-weight: 800; color: var(--text-primary); margin-bottom: 4px; }
.guitar-hub .guitar-date { color: var(--text-tertiary); font-size: 13px; margin-bottom: 24px; }

/* Quick Stats Bar */
.guitar-stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px;
}
.guitar-stat-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 16px; text-align: center;
}
.guitar-stat-value {
  font-family: 'JetBrains Mono', monospace; font-size: 24px; font-weight: 700;
  color: var(--sphere-gold); line-height: 1.2;
}
.guitar-stat-label { color: var(--text-tertiary); font-size: 12px; margin-top: 4px; text-transform: uppercase; letter-spacing: 0.05em; }

/* Timer Widget */
.guitar-timer-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r16);
  padding: 24px; margin-bottom: 24px; text-align: center;
}
.guitar-timer-display {
  font-family: 'JetBrains Mono', monospace; font-size: 64px; font-weight: 700;
  color: var(--text-primary); letter-spacing: 2px; margin: 16px 0;
  transition: color 0.3s;
}
.guitar-timer-display.running { color: var(--sphere-gold); }
@keyframes goldPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,185,95,0.3); }
  50% { box-shadow: 0 0 20px 4px rgba(255,185,95,0.15); }
}
.guitar-timer-card.running { animation: goldPulse 2s ease-in-out infinite; border-color: var(--sphere-gold); }

.timer-controls { display: flex; gap: 12px; justify-content: center; margin-top: 16px; }
.timer-btn {
  padding: 10px 28px; border-radius: var(--r8); font-size: 14px; font-weight: 600;
  border: 1px solid var(--border); cursor: pointer; transition: all 0.2s;
  font-family: var(--font);
}
.timer-btn-start { background: var(--sphere-gold); color: #1a1a1a; border-color: var(--sphere-gold); }
.timer-btn-start:hover { background: var(--sphere-gold-light); }
.timer-btn-pause { background: var(--amber); color: #1a1a1a; border-color: var(--amber); }
.timer-btn-stop { background: transparent; color: var(--red); border-color: var(--red); }
.timer-btn-stop:hover { background: var(--red-bg); }
.timer-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Sections Grid */
.guitar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.guitar-section {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 20px;
}
.guitar-section h3 {
  font-family: var(--font-display); font-size: 15px; font-weight: 700;
  color: var(--text-primary); margin-bottom: 12px; display: flex; align-items: center; gap: 8px;
}
.guitar-section h3 .section-icon { font-size: 16px; }

/* Quick Links Grid */
.guitar-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.guitar-link-card {
  background: var(--bg-card-elevated); border: 1px solid var(--border-light); border-radius: var(--r8);
  padding: 14px 12px; text-align: center; cursor: pointer; transition: all 0.2s;
}
.guitar-link-card:hover { border-color: var(--sphere-gold); background: rgba(255,185,95,0.06); }
.guitar-link-card .link-icon { font-size: 24px; display: block; margin-bottom: 6px; }
.guitar-link-card .link-label { font-size: 12px; color: var(--text-secondary); }

/* Session List */
.session-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0; border-bottom: 1px solid var(--border-light);
}
.session-item:last-child { border-bottom: none; }
.session-date { color: var(--text-tertiary); font-size: 12px; }
.session-duration { font-family: 'JetBrains Mono', monospace; color: var(--sphere-gold); font-size: 14px; font-weight: 600; }
.session-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.session-tag {
  background: rgba(76,215,246,0.1); color: var(--bio-cyan); border-radius: var(--r4);
  padding: 2px 8px; font-size: 11px;
}

/* Weekly Heatmap */
.weekly-heatmap { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.heatmap-day {
  aspect-ratio: 1; border-radius: var(--r6); background: var(--bg-card-elevated);
  border: 1px solid var(--border-light); display: flex; flex-direction: column;
  align-items: center; justify-content: center; font-size: 11px; color: var(--text-tertiary);
}
.heatmap-day.active { background: rgba(255,185,95,0.15); border-color: var(--sphere-gold); }
.heatmap-day .day-label { font-size: 10px; text-transform: uppercase; }
.heatmap-day .day-time { font-family: 'JetBrains Mono', monospace; color: var(--sphere-gold); font-size: 13px; font-weight: 600; }

/* ============================================
   FRETBOARD
   ============================================ */
.fretboard-container { overflow-x: auto; padding: 16px 0; }
.fretboard-controls {
  display: flex; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; align-items: center;
}
.fretboard-controls select, .fretboard-controls label {
  background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--r6);
  padding: 8px 12px; color: var(--text-primary); font-size: 13px;
}
.fretboard-controls label { display: flex; align-items: center; gap: 6px; cursor: pointer; border: none; background: none; padding: 0; }

.fretboard-svg { display: block; }
.fretboard-svg .fret-line { stroke: var(--border); stroke-width: 1; }
.fretboard-svg .nut { stroke: var(--text-secondary); stroke-width: 3; }
.fretboard-svg .string-line { stroke: var(--text-tertiary); stroke-width: 1; }
.fretboard-svg .fret-marker { fill: var(--text-tertiary); opacity: 0.3; }
.fretboard-svg .note-dot { cursor: pointer; transition: opacity 0.15s; }
.fretboard-svg .note-dot:hover { opacity: 0.8; }
.fretboard-svg .note-label { font-family: 'JetBrains Mono', monospace; font-size: 10px; fill: #fff; text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.fretboard-svg .root-dot { fill: var(--sphere-gold); }
.fretboard-svg .scale-dot { fill: var(--bio-cyan); }
.fretboard-svg .fret-number { font-family: 'JetBrains Mono', monospace; font-size: 10px; fill: var(--text-tertiary); text-anchor: middle; }
.fretboard-svg .string-name { font-family: 'JetBrains Mono', monospace; font-size: 11px; fill: var(--text-secondary); text-anchor: end; dominant-baseline: central; }

/* Position Colors */
.pos-1 { fill: var(--sphere-gold); }
.pos-2 { fill: var(--bio-cyan); }
.pos-3 { fill: var(--green); }
.pos-4 { fill: var(--nebula-purple); }
.pos-5 { fill: var(--amber); }
.pos-6 { fill: var(--red); }
.pos-7 { fill: var(--nebula-pink); }

/* ============================================
   SCALE BROWSER
   ============================================ */
.scale-browser { padding: 24px; max-width: 1200px; margin: 0 auto; }
.scale-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; margin-top: 16px; }
.scale-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 16px; cursor: pointer; transition: all 0.2s;
}
.scale-card:hover { border-color: var(--sphere-gold); background: rgba(255,185,95,0.04); }
.scale-card-name { font-family: var(--font-display); font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.scale-card-category { font-size: 11px; color: var(--bio-cyan); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.scale-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.4; margin-bottom: 8px; }
.scale-card-mood { font-size: 12px; color: var(--text-tertiary); }
.scale-card-genres { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 8px; }
.scale-card-genre { background: rgba(76,215,246,0.08); color: var(--bio-cyan-dim); border-radius: var(--r4); padding: 2px 8px; font-size: 10px; }

/* Scale Detail View */
.scale-detail { padding: 24px; max-width: 1200px; margin: 0 auto; }
.scale-detail h1 { font-family: var(--font-display); font-size: 24px; font-weight: 800; }
.scale-info-bar { display: flex; gap: 16px; flex-wrap: wrap; margin: 12px 0 24px; }
.scale-info-item { font-size: 13px; color: var(--text-secondary); }
.scale-info-item strong { color: var(--text-primary); }

.positions-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-top: 16px; }
.position-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12); padding: 16px;
}
.position-card h4 { font-family: var(--font-display); font-size: 14px; font-weight: 700; color: var(--sphere-gold); margin-bottom: 8px; }

/* ============================================
   CIRCLE OF FIFTHS
   ============================================ */
.cof-page { padding: 24px; max-width: 1200px; margin: 0 auto; }
.cof-container { display: flex; gap: 24px; flex-wrap: wrap; }
.cof-svg-wrap { flex: 0 0 400px; }
.cof-info { flex: 1; min-width: 280px; }
.cof-svg .key-arc { cursor: pointer; transition: opacity 0.2s; }
.cof-svg .key-arc:hover { opacity: 0.8; }
.cof-svg .key-label { font-family: var(--font-display); font-weight: 700; fill: var(--text-primary); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.cof-svg .minor-label { font-family: var(--font); font-size: 11px; fill: var(--text-secondary); text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.cof-svg .active-arc { fill: rgba(255,185,95,0.3); }
.cof-svg .neighbor-arc { fill: rgba(255,185,95,0.1); }
.cof-key-info {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12); padding: 20px;
}
.cof-key-info h3 { font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--sphere-gold); margin-bottom: 12px; }
.cof-chord-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; margin: 12px 0; }
.cof-chord-cell { text-align: center; padding: 8px 4px; background: var(--bg-card-elevated); border-radius: var(--r6); }
.cof-chord-numeral { font-size: 11px; color: var(--text-tertiary); }
.cof-chord-name { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-primary); font-weight: 600; }
.cof-progressions { margin-top: 16px; }
.cof-prog-item { padding: 8px 12px; background: var(--bg-card-elevated); border-radius: var(--r6); margin-bottom: 6px; }
.cof-prog-name { font-size: 12px; color: var(--bio-cyan); font-weight: 600; }
.cof-prog-chords { font-family: 'JetBrains Mono', monospace; font-size: 13px; color: var(--text-primary); margin-top: 2px; }

/* ============================================
   SONGS
   ============================================ */
.songs-page { padding: 24px; max-width: 1200px; margin: 0 auto; }
.songs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin-top: 16px; }
.song-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 16px; cursor: pointer; transition: all 0.2s;
}
.song-card:hover { border-color: var(--sphere-gold); }
.song-card-title { font-family: var(--font-display); font-size: 16px; font-weight: 700; color: var(--text-primary); }
.song-card-artist { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }
.song-card-meta { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.song-meta-pill {
  font-size: 11px; padding: 3px 8px; border-radius: var(--r4);
  background: rgba(76,215,246,0.08); color: var(--bio-cyan-dim);
}
.song-meta-pill.difficulty-beginner { background: rgba(52,211,153,0.1); color: var(--green); }
.song-meta-pill.difficulty-intermediate { background: rgba(245,158,11,0.1); color: var(--amber); }
.song-meta-pill.difficulty-advanced { background: rgba(239,68,68,0.1); color: var(--red); }
.song-meta-pill.status-learning { background: rgba(76,215,246,0.1); color: var(--bio-cyan); }
.song-meta-pill.status-learned { background: rgba(52,211,153,0.1); color: var(--green); }
.song-meta-pill.status-want_to_learn { background: rgba(139,92,246,0.1); color: var(--nebula-purple); }

/* Song Detail */
.song-detail { padding: 24px; max-width: 1200px; margin: 0 auto; }
.song-detail h1 { font-family: var(--font-display); font-size: 24px; font-weight: 800; }
.song-artist { font-size: 15px; color: var(--text-secondary); margin-top: 2px; }
.song-meta-bar { display: flex; gap: 12px; flex-wrap: wrap; margin: 16px 0; }
.song-external-links { display: flex; gap: 8px; margin: 16px 0; }
.song-ext-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--r6); font-size: 13px; font-weight: 600;
  border: 1px solid var(--border); color: var(--text-primary); cursor: pointer;
  background: var(--bg-card-elevated); text-decoration: none; transition: all 0.2s;
}
.song-ext-btn:hover { border-color: var(--sphere-gold); color: var(--sphere-gold); text-decoration: none; }

.song-sections { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.song-section {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12); padding: 20px;
}
.song-section h3 { font-family: var(--font-display); font-size: 14px; font-weight: 700; color: var(--sphere-gold); margin-bottom: 12px; }
.chord-progression {
  font-family: 'JetBrains Mono', monospace; font-size: 18px; color: var(--text-primary);
  letter-spacing: 1px; padding: 12px; background: var(--bg-card-elevated); border-radius: var(--r8);
}
.song-structure-item { padding: 8px 0; border-bottom: 1px solid var(--border-light); }
.song-structure-item:last-child { border-bottom: none; }
.song-structure-label { font-size: 12px; color: var(--bio-cyan); font-weight: 600; text-transform: uppercase; }
.song-structure-value { font-size: 13px; color: var(--text-primary); margin-top: 2px; }

/* ============================================
   TEACHER PAGE
   ============================================ */
.teacher-page { padding: 24px; max-width: 1000px; margin: 0 auto; }
.teacher-profile-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r16);
  padding: 24px; display: flex; gap: 20px; align-items: flex-start; margin-bottom: 24px;
}
.teacher-avatar {
  width: 72px; height: 72px; border-radius: var(--r-full); background: var(--bg-card-elevated);
  border: 2px solid var(--sphere-gold); display: flex; align-items: center; justify-content: center;
  font-size: 28px; flex-shrink: 0;
}
.teacher-info h2 { font-family: var(--font-display); font-size: 20px; font-weight: 700; }
.teacher-meta { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }
.teacher-stats { display: flex; gap: 24px; margin-top: 12px; }
.teacher-stat { text-align: center; }
.teacher-stat-val { font-family: 'JetBrains Mono', monospace; font-size: 18px; font-weight: 700; color: var(--sphere-gold); }
.teacher-stat-label { font-size: 11px; color: var(--text-tertiary); }

.invoice-table { width: 100%; border-collapse: collapse; }
.invoice-table th {
  text-align: left; font-size: 11px; color: var(--text-tertiary); text-transform: uppercase;
  letter-spacing: 0.05em; padding: 8px 12px; border-bottom: 1px solid var(--border);
}
.invoice-table td { padding: 10px 12px; border-bottom: 1px solid var(--border-light); font-size: 13px; }
.invoice-table .paid { color: var(--green); }
.invoice-table .unpaid { color: var(--amber); }

/* ============================================
   PROGRESS PAGE
   ============================================ */
.progress-page { padding: 24px; max-width: 1200px; margin: 0 auto; }
.progress-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px; }
.progress-chart-section {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 20px; margin-bottom: 16px;
}
.progress-chart-section h3 { font-family: var(--font-display); font-size: 15px; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }

/* Bar Chart */
.bar-chart { display: flex; align-items: flex-end; gap: 3px; height: 120px; }
.bar-chart-bar {
  flex: 1; background: var(--bio-cyan); border-radius: 2px 2px 0 0; min-width: 4px;
  transition: background 0.2s; cursor: pointer; position: relative;
}
.bar-chart-bar:hover { background: var(--sphere-gold); }
.bar-chart-bar.today { background: var(--sphere-gold); }

/* Heatmap Calendar */
.heatmap-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; }
.heatmap-cell {
  aspect-ratio: 1; border-radius: 3px; background: var(--bg-card-elevated);
  border: 1px solid var(--border-light); font-size: 10px; display: flex;
  align-items: center; justify-content: center; color: var(--text-tertiary);
}
.heatmap-cell.level-1 { background: rgba(255,185,95,0.15); }
.heatmap-cell.level-2 { background: rgba(255,185,95,0.3); }
.heatmap-cell.level-3 { background: rgba(255,185,95,0.5); }
.heatmap-cell.level-4 { background: rgba(255,185,95,0.7); }

/* ============================================
   HABITS DASHBOARD
   ============================================ */
.habits-page { padding: 24px; max-width: 1200px; margin: 0 auto; }
.habits-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 16px; }
.habit-card-full {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r12);
  padding: 16px; cursor: pointer; transition: all 0.2s; position: relative;
}
.habit-card-full:hover { border-color: var(--sphere-gold); }
.habit-card-full .habit-card-icon { font-size: 28px; margin-bottom: 8px; }
.habit-card-full .habit-card-name { font-family: var(--font-display); font-size: 14px; font-weight: 700; color: var(--text-primary); }
.habit-card-full .habit-card-streak { font-family: 'JetBrains Mono', monospace; font-size: 20px; font-weight: 700; margin-top: 8px; }
.habit-card-full .habit-card-streak-label { font-size: 11px; color: var(--text-tertiary); }
.habit-card-full .habit-card-week {
  display: flex; gap: 3px; margin-top: 10px;
}
.habit-card-full .habit-week-dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--bg-card-elevated); border: 1px solid var(--border-light);
}
.habit-card-full .habit-week-dot.done { border-color: transparent; }
.habit-card-full .habit-check-btn {
  position: absolute; top: 12px; right: 12px; width: 28px; height: 28px;
  border-radius: 50%; border: 2px solid var(--border); background: transparent;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  font-size: 14px; color: transparent; transition: all 0.2s;
}
.habit-card-full .habit-check-btn.done { background: var(--green); border-color: var(--green); color: #fff; }
.habit-card-full .habit-hub-link {
  display: inline-flex; align-items: center; gap: 4px; margin-top: 10px;
  font-size: 12px; color: var(--sphere-gold); cursor: pointer;
}
.habit-card-full .habit-hub-link:hover { text-decoration: underline; }

/* Habit Detail Page */
.habit-detail { padding: 24px; max-width: 1000px; margin: 0 auto; }
.habit-detail-header { display: flex; align-items: center; gap: 16px; margin-bottom: 24px; }
.habit-detail-icon { font-size: 40px; }
.habit-detail-info h1 { font-family: var(--font-display); font-size: 24px; font-weight: 800; }
.habit-detail-meta { color: var(--text-secondary); font-size: 13px; }
.habit-log-btn {
  padding: 12px 24px; background: var(--sphere-gold); color: #1a1a1a; border: none;
  border-radius: var(--r8); font-size: 15px; font-weight: 700; cursor: pointer;
  font-family: var(--font-display); transition: background 0.2s; margin-bottom: 24px;
}
.habit-log-btn:hover { background: var(--sphere-gold-light); }

/* Modals */
.guitar-modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7); z-index: 1000; display: flex;
  align-items: center; justify-content: center; padding: 24px;
}
.guitar-modal {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r16);
  padding: 24px; max-width: 480px; width: 100%; max-height: 80vh; overflow-y: auto;
}
.guitar-modal h3 { font-family: var(--font-display); font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.guitar-modal label { display: block; font-size: 13px; color: var(--text-secondary); margin: 12px 0 4px; }
.guitar-modal input, .guitar-modal textarea, .guitar-modal select {
  width: 100%; padding: 8px 12px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--r6); color: var(--text-primary); font-size: 13px;
}
.guitar-modal textarea { min-height: 80px; resize: vertical; }
.guitar-modal .modal-actions { display: flex; gap: 10px; margin-top: 20px; justify-content: flex-end; }
.guitar-modal .modal-btn-primary {
  padding: 8px 20px; background: var(--sphere-gold); color: #1a1a1a; border: none;
  border-radius: var(--r6); font-weight: 600; cursor: pointer;
}
.guitar-modal .modal-btn-secondary {
  padding: 8px 20px; background: transparent; color: var(--text-secondary); border: 1px solid var(--border);
  border-radius: var(--r6); cursor: pointer;
}

/* Back button */
.guitar-back-btn {
  display: inline-flex; align-items: center; gap: 6px; color: var(--text-secondary);
  font-size: 13px; cursor: pointer; margin-bottom: 16px; background: none; border: none;
  font-family: var(--font); padding: 0;
}
.guitar-back-btn:hover { color: var(--sphere-gold); }

/* Responsive */
@media (max-width: 768px) {
  .guitar-stats-bar { grid-template-columns: repeat(2, 1fr); }
  .guitar-grid { grid-template-columns: 1fr; }
  .guitar-links { grid-template-columns: repeat(2, 1fr); }
  .song-sections { grid-template-columns: 1fr; }
  .cof-container { flex-direction: column; }
  .cof-svg-wrap { flex: auto; max-width: 100%; }
  .progress-stats-grid { grid-template-columns: repeat(2, 1fr); }
  .guitar-timer-display { font-size: 48px; }
  .scale-grid { grid-template-columns: 1fr; }
}

/* JetBrains Mono import */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap');