:root {
  --bg: #0A1613;
  --bg-elevated: #0F1F1A;
  --bg-card: #15251F;
  --bg-card-2: #1B2F27;
  --accent: #22C58B;
  --accent-2: #14B8A6;
  --accent-blue: #1E90C9;
  --accent-soft: rgba(34, 197, 139, 0.16);
  --teal: #2FD9C4;
  --on-accent: #062018;
  --gold-grad: linear-gradient(135deg, #5EEAB0 0%, #22C58B 50%, #129C74 100%);
  --pink-grad: linear-gradient(135deg, #2FD9C4 0%, #1E90C9 100%);
  --text: #F2F7F5;
  --text-dim: #A9C2B9;
  --text-faint: #7C9A91;
  --border: #24352E;
  --success: #6FD19B;
  --danger: #F87171;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-card: 0 2px 10px rgba(0,0,0,0.3);
  --shadow-hover: 0 14px 30px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 0 1px rgba(34,197,139,0.25), 0 8px 24px rgba(34,197,139,0.14);
  --font-head: 'Poppins', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --sidebar-w: 260px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(34,197,139,0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 0%, rgba(30,144,201,0.08), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
}

h1, h2, h3 { font-family: var(--font-head); margin: 0; }

/* ---------- Layout ---------- */

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand { display: flex; align-items: center; gap: 10px; padding: 6px 8px 22px; }
.brand-mark {
  font-size: 1.4rem; width: 38px; height: 38px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gold-grad); box-shadow: var(--shadow-glow);
}
.brand-name {
  font-family: var(--font-head); font-weight: 700; font-size: 0.95rem; line-height: 1.2;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.brand-sub { font-size: 0.72rem; color: var(--text-dim); }

.nav-groups { flex: 1; display: flex; flex-direction: column; gap: 18px; }
.nav-group { display: flex; flex-direction: column; gap: 3px; }
.nav-group-label {
  font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-faint); padding: 6px 10px 4px;
}
.nav-btn {
  display: flex; align-items: center; gap: 10px;
  background: transparent; border: none; color: var(--text-dim);
  text-align: left; padding: 10px 10px; border-radius: var(--radius-sm);
  font-size: 0.88rem; cursor: pointer; transition: background 0.15s, color 0.15s;
  font-family: var(--font-body);
}
.nav-btn:hover { background: var(--bg-card); color: var(--text); transform: translateX(2px); }
.nav-btn {  border-left: 2px solid transparent; }
.nav-btn.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; border-left: 2px solid var(--accent); }
.nav-btn-disabled { opacity: 0.55; }

.sidebar-streak {
  margin-top: 16px; display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px;
  box-shadow: var(--shadow-card);
}
.streak-flame { font-size: 1.4rem; filter: drop-shadow(0 0 6px rgba(34,197,139,0.5)); }
.streak-num { font-weight: 700; font-size: 0.95rem; }
.streak-label-sm { font-size: 0.7rem; color: var(--text-dim); }

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 40;
}

.mobile-menu-btn {
  display: none;
  position: fixed; top: 14px; left: 14px; z-index: 60;
  background: var(--bg-card); color: var(--text); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 12px; font-size: 1.1rem; cursor: pointer;
}

.main-content {
  flex: 1;
  padding: 32px clamp(16px, 4vw, 48px) 100px;
  max-width: 920px;
}

.panel { display: none; animation: fadeIn 0.25s ease; }
.panel.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-header { margin-bottom: 24px; }
.panel-header h1 { font-size: 1.5rem; margin-bottom: 6px; }
.panel-desc { color: var(--text-dim); font-size: 0.9rem; max-width: 620px; }
.section-title { font-size: 1.05rem; margin: 28px 0 14px; }

#dashboard .panel-header {
  background: linear-gradient(135deg, rgba(34,197,139,0.14), rgba(30,144,201,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  margin-bottom: 28px;
}
#dashboard .panel-header h1 { font-size: 1.7rem; }

/* ---------- Stats & actions ---------- */

.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 8px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; text-align: center; box-shadow: var(--shadow-card);
  transition: transform 0.15s, box-shadow 0.15s;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.stat-value {
  display: block; font-family: var(--font-head); font-size: 1.8rem; font-weight: 700;
  background: var(--gold-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-label { font-size: 0.76rem; color: var(--text-dim); }

.action-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px;
}
.action-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 16px; cursor: pointer; transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
  text-align: left; position: relative; overflow: hidden; color: var(--text); font-family: var(--font-body);
}
.action-card::before {
  content: ""; position: absolute; inset: 0; background: var(--gold-grad); opacity: 0;
  transition: opacity 0.18s; z-index: 0;
}
.action-card:hover { transform: translateY(-4px) scale(1.01); border-color: var(--accent); box-shadow: var(--shadow-hover); }
.action-card:hover::before { opacity: 0.08; }
.action-icon { font-size: 1.7rem; display: block; margin-bottom: 10px; position: relative; z-index: 1; transition: transform 0.18s; }
.action-card:hover .action-icon { transform: scale(1.15) rotate(-4deg); }
.action-title { font-weight: 600; font-size: 0.9rem; position: relative; z-index: 1; }

.recent-list { display: flex; flex-direction: column; gap: 10px; }

/* ---------- Cards & generic components ---------- */

.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; margin-bottom: 18px;
}
.card h3 { font-size: 1rem; margin-bottom: 12px; }

.badge {
  display: inline-block; background: var(--gold-grad); color: var(--on-accent);
  font-size: 0.72rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; margin-bottom: 12px;
  box-shadow: var(--shadow-glow);
}

.trigger-text { font-size: 1.05rem; margin: 0 0 14px; }
.big-quote { font-size: 1.15rem; font-style: italic; line-height: 1.6; }
.trigger-tip { font-size: 0.85rem; color: var(--text-dim); margin: 0 0 16px; }

.card-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.btn {
  border: none; border-radius: 10px; padding: 12px 16px; font-size: 0.88rem;
  font-weight: 600; cursor: pointer; transition: opacity 0.15s, transform 0.1s;
  font-family: var(--font-body);
}
.btn:hover { opacity: 0.92; transform: translateY(-1px); }
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--gold-grad); color: var(--on-accent); flex: 1; min-width: 140px; box-shadow: var(--shadow-glow); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.full-width { width: 100%; margin-top: 4px; }
.btn-icon { background: transparent; border: none; color: var(--text-dim); font-size: 1rem; cursor: pointer; }
.btn-text-danger {
  background: none; border: none; color: var(--danger); font-size: 0.8rem; cursor: pointer;
  margin-top: 10px; padding: 0;
}

label.field-label { display: block; font-size: 0.8rem; color: var(--text-dim); margin: 12px 0 6px; }
input[type="text"], input[type="time"], textarea, select {
  width: 100%; background: var(--bg-card-2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 12px; border-radius: 8px; font-size: 0.88rem; font-family: inherit;
}
textarea { resize: vertical; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }

.save-confirm { display: none; color: var(--success); font-size: 0.85rem; margin: 10px 0 0; text-align: center; }
.save-confirm.show { display: block; }

.search-row { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.search-row input { flex: 1; min-width: 200px; }

.ideas-list { display: flex; flex-direction: column; gap: 10px; }
.empty-state { color: var(--text-dim); font-size: 0.88rem; text-align: center; padding: 24px 0; }
.idea-item {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px;
}
.idea-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; gap: 8px; flex-wrap: wrap; }
.idea-title { font-weight: 600; font-size: 0.9rem; }
.idea-date { font-size: 0.72rem; color: var(--text-dim); }
.idea-text { font-size: 0.88rem; color: var(--text-dim); margin: 0 0 8px; }
.idea-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.idea-tag { font-size: 0.7rem; background: var(--bg-card-2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 8px; color: var(--text-dim); }
.idea-actions { display: flex; gap: 14px; }
.idea-actions button { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 0.8rem; padding: 0; }
.idea-actions button.is-fav { color: var(--accent); }

.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-list .chip {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 999px;
  padding: 6px 12px; font-size: 0.8rem; color: var(--text-dim);
}

.chip-select { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.chip-select button {
  background: var(--bg-card-2); border: 1px solid var(--border); color: var(--text-dim);
  padding: 8px 14px; border-radius: 999px; font-size: 0.8rem; cursor: pointer;
}
.chip-select button.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.genre-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.genre-tabs button {
  background: var(--bg-card-2); border: 1px solid var(--border); color: var(--text-dim);
  padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.8rem; cursor: pointer;
}
.genre-tabs button.active { background: var(--teal); color: var(--on-accent); border-color: var(--teal); }
.genre-lens { font-size: 0.9rem; color: var(--text); background: var(--bg-card-2); padding: 14px; border-radius: var(--radius-sm); }

.level-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.level-btn {
  flex: 1; background: var(--bg-card-2); border: 1px solid var(--border); color: var(--text-dim);
  padding: 10px; border-radius: 10px; font-size: 0.82rem; cursor: pointer;
}
.level-btn.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.progression-desc { color: var(--text-dim); font-size: 0.85rem; margin: 0 0 6px; }
.chord-row { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 8px; margin: 12px 0; }
.chord-block {
  flex: 0 0 auto; background: var(--bg-card-2); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 12px; text-align: center; min-width: 92px;
}
.chord-name { font-weight: 700; color: var(--accent); margin-bottom: 6px; display: block; }
.chord-piano { font-size: 0.72rem; color: var(--text-dim); margin-top: 6px; }

.dict-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.dict-item {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px;
}
.dict-word { font-weight: 700; color: var(--accent); font-size: 0.92rem; }
.dict-def { font-size: 0.82rem; color: var(--text-dim); margin: 4px 0 8px; }
.dict-insert { background: none; border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 4px 10px; font-size: 0.72rem; cursor: pointer; }

.reminder-toggle-row { display: flex; justify-content: space-between; align-items: center; margin: 16px 0; font-size: 0.9rem; }
.switch { position: relative; display: inline-block; width: 46px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; inset: 0; background: var(--border); border-radius: 999px; transition: 0.2s; }
.slider::before { content: ""; position: absolute; height: 20px; width: 20px; left: 3px; bottom: 3px; background: var(--text); border-radius: 50%; transition: 0.2s; }
input:checked + .slider { background: var(--accent); }
input:checked + .slider::before { transform: translateX(20px); background: var(--on-accent); }

.days-row { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.day-btn {
  flex: 1; min-width: 40px; background: var(--bg-card-2); border: 1px solid var(--border); color: var(--text-dim);
  padding: 8px 0; border-radius: 8px; font-size: 0.78rem; cursor: pointer;
}
.day-btn.active { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.notif-help { font-size: 0.78rem; color: var(--text-dim); margin-top: 12px; line-height: 1.6; }

.progress-row { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 6px; }
.progress-bar { background: var(--bg-card-2); border-radius: 999px; height: 8px; margin-bottom: 16px; overflow: hidden; }
.progress-fill { background: var(--accent); height: 100%; width: 0%; transition: width 0.3s; }

.roadmap-list { margin: 0; padding-left: 18px; display: flex; flex-direction: column; gap: 12px; font-size: 0.88rem; color: var(--text-dim); }
.roadmap-list strong { color: var(--text); }

/* ---------- Tendencias & Spotlight ---------- */

.trend-list { display: flex; flex-direction: column; gap: 10px; margin: 14px 0; }
.trend-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-card-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; transition: transform 0.15s;
}
.trend-item:hover { transform: translateX(3px); }
.trend-rank {
  font-family: var(--font-head); font-weight: 700; font-size: 1rem; color: var(--accent);
  width: 26px; text-align: center; flex-shrink: 0;
}
.trend-info { flex: 1; }
.trend-song { font-weight: 600; font-size: 0.9rem; }
.trend-artist { font-size: 0.78rem; color: var(--text-dim); }
.trend-note { font-size: 0.75rem; color: var(--text-faint); margin-top: 12px; }
.trend-note a { color: var(--teal); }

.spotlight-card {
  background: linear-gradient(160deg, var(--bg-card) 0%, var(--bg-card-2) 100%);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow-card);
}
.spotlight-header { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.spotlight-avatar {
  width: 64px; height: 64px; border-radius: 50%; flex-shrink: 0;
  background: var(--pink-grad); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 700; font-size: 1.3rem; color: var(--on-accent);
  box-shadow: 0 0 0 3px rgba(232,93,117,0.18), var(--shadow-card);
}
.spotlight-name { font-family: var(--font-head); font-size: 1.15rem; font-weight: 700; }
.spotlight-role { font-size: 0.82rem; color: var(--text-dim); }
.spotlight-stats { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.spotlight-stat {
  background: var(--accent-soft); color: var(--accent); font-size: 0.75rem; font-weight: 600;
  padding: 5px 11px; border-radius: 999px;
}
.spotlight-quote {
  font-style: italic; font-size: 0.92rem; border-left: 3px solid var(--accent);
  padding: 4px 0 4px 14px; margin: 14px 0; color: var(--text);
}
.spotlight-lessons { margin: 12px 0 0; padding-left: 18px; font-size: 0.86rem; color: var(--text-dim); display: flex; flex-direction: column; gap: 8px; }
.spotlight-lessons strong { color: var(--text); }
.spotlight-source { font-size: 0.72rem; color: var(--text-faint); margin-top: 14px; }
.spotlight-source a { color: var(--teal); }

/* ---------- Song FAB & panel ---------- */

.song-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 50;
  width: 56px; height: 56px; border-radius: 50%; border: none;
  background: var(--accent); color: var(--on-accent); font-size: 1.4rem; cursor: pointer;
  box-shadow: 0 6px 18px rgba(0,0,0,0.4);
}

.song-panel {
  position: fixed; top: 0; right: -400px; width: 360px; max-width: 92vw; height: 100vh;
  background: var(--bg-elevated); border-left: 1px solid var(--border); z-index: 55;
  padding: 20px; overflow-y: auto; transition: right 0.25s ease;
  display: flex; flex-direction: column; gap: 10px;
}
.song-panel.open { right: 0; }
.song-panel-header { display: flex; justify-content: space-between; align-items: center; }
.analysis-details { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; margin-top: 4px; }
.analysis-details summary { cursor: pointer; font-size: 0.85rem; color: var(--text-dim); }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .mobile-menu-btn { display: block; }
  .sidebar {
    position: fixed; left: -280px; top: 0; z-index: 50; transition: left 0.2s ease; width: 260px;
  }
  .sidebar.open { left: 0; }
  .sidebar-overlay.show { display: block; }
  .main-content { padding: 70px 16px 100px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: 1fr; }
}