@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,500;14..32,600;14..32,700;14..32,800&display=swap');

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

:root {
  --bg-base: #0c0c0c;
  --bg-surface: #1a1a1a;
  --bg-surface-elevated: #262626;
  --bg-glass: rgba(26, 26, 26, 0.72);
  --bg-glass-light: rgba(255, 255, 255, 0.025);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);

  --text-main: #f5f5f5;
  --text-muted: #a3a3a3;
  --text-faint: #5c5c5c;

  --accent-primary: #E5002D;
  --accent-primary-hover: #ff1a47;
  --accent-gradient: linear-gradient(135deg, #E5002D 0%, #b30023 100%);

  --status-success: #2dd4a0;
  --status-success-bg: rgba(45, 212, 160, 0.08);
  --status-warning: #f5a623;
  --status-warning-bg: rgba(245, 166, 35, 0.08);
  --status-error: #f25f5c;
  --status-error-bg: rgba(242, 95, 92, 0.07);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 30px rgba(124, 108, 246, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  --slot-height: 24px;
  --header-height: 40px;
}

html { font-size: 15px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-base);
  color: var(--text-main);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient background glow */
body::before {
  content: ''; position: fixed; top: -30%; left: 50%; transform: translateX(-50%);
  width: 80vw; height: 60vh;
  background: radial-gradient(ellipse at center, rgba(124, 108, 246, 0.07) 0%, transparent 70%);
  z-index: 0; pointer-events: none;
}
body::after {
  content: ''; position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='1' cy='1' r='1' fill='rgba(255,255,255,0.03)'/%3E%3C/svg%3E");
  background-size: 20px 20px;
  z-index: 0; pointer-events: none;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.14); }

.app { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 16px 20px; }

/* ─── TYPOGRAPHY & HEADER ─── */
.app-header { text-align: center; padding: 48px 20px 32px; }
.header-badge {
  display: inline-block; padding: 5px 14px; background: rgba(124, 108, 246, 0.08);
  border: 1px solid rgba(124, 108, 246, 0.18); border-radius: var(--radius-full);
  font-size: 0.7rem; font-weight: 600; color: var(--accent-primary-hover);
  letter-spacing: 0.8px; margin-bottom: 14px; text-transform: uppercase;
}
.app-header h1 {
  font-size: 2.5rem; font-weight: 700; letter-spacing: -1.5px; margin-bottom: 10px;
  background: linear-gradient(135deg, #fff 0%, #c4bfff 50%, var(--accent-primary) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.app-header p { color: var(--text-muted); font-size: 0.95rem; font-weight: 400; max-width: 420px; margin: 0 auto; line-height: 1.6; }

/* ─── PHASES ─── */
.phase { display: none; animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.phase.active { display: block; }

@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── CONFIG PHASE (LANDING) ─── */
.config-panel {
  background: var(--bg-glass); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 36px; max-width: 460px; margin: 0 auto 32px; box-shadow: var(--shadow-card);
}
.config-panel h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 24px; text-align: center; color: var(--text-main); letter-spacing: -0.3px; }
.config-form { display: flex; flex-direction: column; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-group label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; letter-spacing: 0.2px; }

.config-select {
  width: 100%; padding: 12px 16px; background: var(--bg-base); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); color: var(--text-main); font-family: 'Inter', sans-serif;
  font-size: 0.9rem; font-weight: 500; outline: none; transition: var(--transition); appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238e8e96' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 15px;
}
.config-select:focus { border-color: var(--accent-primary); box-shadow: 0 0 0 3px rgba(124,108,246,0.1); }
.config-select:hover { border-color: var(--border-hover); }

/* Landing Features */
.feature-cards { display: flex; gap: 16px; max-width: 780px; margin: 36px auto 0; justify-content: center; flex-wrap: wrap; }
.feature-card {
  flex: 1; min-width: 210px; background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 22px; text-align: left; transition: var(--transition);
}
.feature-card:hover { border-color: var(--border-hover); background: var(--bg-surface-elevated); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.feature-icon { font-size: 1.35rem; margin-bottom: 12px; display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: rgba(124,108,246,0.08); border-radius: 10px; border: 1px solid rgba(124,108,246,0.12); }
.feature-title { font-size: 0.88rem; font-weight: 600; color: var(--text-main); margin-bottom: 5px; letter-spacing: -0.2px; }
.feature-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.55; }

.steps-row { display: flex; align-items: center; justify-content: center; gap: 14px; max-width: 560px; margin: 28px auto 0; padding: 14px 20px; background: var(--bg-surface); border-radius: var(--radius-full); border: 1px solid var(--border-subtle); }
.step-item { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }
.step-num { width: 22px; height: 22px; background: var(--accent-gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.7rem; font-weight: 700; color: white; flex-shrink: 0; }
.step-arrow { color: var(--text-faint); font-size: 1rem; }
@media(max-width:768px) { .steps-row { flex-direction: column; gap: 10px; } .step-arrow { transform: rotate(90deg); } }

/* ─── BUTTONS ─── */
.generate-btn {
  padding: 12px 24px; background: var(--accent-gradient); border: none; border-radius: var(--radius-md);
  color: white; font-family: 'Inter', sans-serif; font-size: 0.88rem; font-weight: 600; cursor: pointer;
  transition: var(--transition); display: flex; align-items: center; justify-content: center; gap: 8px;
  box-shadow: 0 2px 12px rgba(124, 108, 246, 0.25); white-space: nowrap; flex-shrink: 0;
}
.generate-btn:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(124, 108, 246, 0.4); filter: brightness(1.08); }
.generate-btn:active:not(:disabled) { transform: translateY(0) scale(0.98); }
.generate-btn:disabled { opacity: 0.4; cursor: not-allowed; filter: grayscale(0.4); box-shadow: none; transform: none; }
.generate-btn.ready { animation: gentlePulse 3s ease-in-out infinite; }

@keyframes gentlePulse {
  0%, 100% { box-shadow: 0 2px 12px rgba(124, 108, 246, 0.25); }
  50% { box-shadow: 0 2px 20px rgba(124, 108, 246, 0.45), 0 0 0 3px rgba(124, 108, 246, 0.08); }
}

.back-btn, .reset-btn, .pill-btn {
  padding: 7px 14px; border: 1px solid var(--border-subtle); background: var(--bg-surface);
  color: var(--text-main); border-radius: var(--radius-full); cursor: pointer; font-family: 'Inter', sans-serif;
  font-size: 0.78rem; font-weight: 500; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px;
}
.back-btn:hover, .pill-btn:hover { background: var(--bg-surface-elevated); border-color: var(--border-hover); }
.back-btn:active, .pill-btn:active { transform: scale(0.97); }
.reset-btn { color: var(--status-error); background: var(--status-error-bg); border-color: rgba(242, 95, 92, 0.15); }
.reset-btn:hover { background: rgba(242, 95, 92, 0.14); }

.pill-btn.active { background: var(--text-main); color: var(--bg-base); border-color: var(--text-main); font-weight: 600; }

/* ─── SELECTION SUMMARY (STICKY) ─── */
.selection-top-nav { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.selection-summary {
  background: var(--bg-glass); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 18px; margin-bottom: 20px; position: sticky; top: 8px; z-index: 50; box-shadow: var(--shadow-card);
}
.summary-buckets { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; margin-bottom: 16px; align-items: stretch; }
@media (max-width: 768px) { .summary-buckets { grid-template-columns: 1fr; } }

.bucket { background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 14px; }
.bucket-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.bucket-label { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px; }
.bucket-label.req { color: var(--status-error); }
.bucket-label.opt { color: var(--status-success); }
.bucket-count { font-size: 0.7rem; padding: 2px 9px; border-radius: var(--radius-full); font-weight: 700; background: var(--bg-surface-elevated); color: var(--text-main); }
.bucket-chips { display: flex; flex-wrap: wrap; gap: 6px; min-height: 26px; align-items: center; }
.bucket-empty { font-size: 0.78rem; color: var(--text-faint); font-style: italic; }

.sel-chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 11px; border-radius: var(--radius-full);
  font-size: 0.78rem; font-weight: 600; animation: scaleIn 0.25s cubic-bezier(0.16, 1, 0.3, 1); letter-spacing: -0.2px;
}
@keyframes scaleIn { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }

.sel-chip.required { background: var(--status-error-bg); color: var(--status-error); border: 1px solid rgba(242, 95, 92, 0.15); }
.sel-chip.optional { background: var(--status-success-bg); color: var(--status-success); border: 1px solid rgba(45, 212, 160, 0.15); }
.chip-remove { background: none; border: none; color: inherit; cursor: pointer; font-size: 0.95rem; line-height: 1; opacity: 0.6; transition: var(--transition); }
.chip-remove:hover { opacity: 1; }

.summary-config {
  display: flex; align-items: center; gap: 12px; padding-top: 16px; border-top: 1px solid var(--border-subtle); flex-wrap: wrap;
}
.config-item { display: flex; align-items: center; gap: 10px; }
.config-item label { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; white-space: nowrap; }
.stepper { display: flex; align-items: center; background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); overflow: hidden; }
.stepper-btn { width: 34px; height: 34px; background: transparent; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; transition: var(--transition); font-family: 'Inter', sans-serif; }
.stepper-btn:hover { background: var(--bg-surface-elevated); color: var(--text-main); }
.stepper-btn:active { background: var(--bg-surface); }
.stepper-value { width: 36px; text-align: center; font-size: 0.9rem; font-weight: 700; color: var(--text-main); font-variant-numeric: tabular-nums; }

.config-info { flex: 1; font-size: 0.8rem; font-weight: 500; text-align: right; color: var(--text-muted); min-width: 200px; }

/* ─── SEARCH & FILTERS ─── */
.search-filters { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.search-wrapper { position: relative; }
.search-input {
  width: 100%; padding: 12px 40px 12px 44px; background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); color: var(--text-main); font-family: 'Inter', sans-serif; font-size: 0.9rem;
  transition: var(--transition);
}
.search-input:focus { border-color: var(--accent-primary); outline: none; box-shadow: 0 0 0 3px rgba(124,108,246,0.1); }
.search-input::placeholder { color: var(--text-faint); }
.search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-faint); font-size: 1rem; }
.search-clear { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: none; border: none; font-size: 1.3rem; color: var(--text-muted); cursor: pointer; display: none; transition: var(--transition); }
.search-clear:hover { color: var(--text-main); }
.filter-row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; flex-wrap: wrap; }
.filter-row::-webkit-scrollbar { height: 0; display: none; }
.filter-pill { padding: 5px 13px; background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 500; color: var(--text-muted); cursor: pointer; white-space: nowrap; transition: var(--transition); }
.filter-pill:hover { background: var(--bg-surface-elevated); color: var(--text-main); border-color: var(--border-hover); }
.filter-pill.active { background: var(--text-main); color: var(--bg-base); border-color: var(--text-main); font-weight: 600; }
.bucket-divider { width: 16px; display: flex; align-items: center; justify-content: center; }
.bucket-divider::after { content: ''; width: 1px; height: 60%; background: var(--border-subtle); }
@media(max-width:768px){ .bucket-divider{display:none} }

/* ─── CATALOG GRID ─── */
.catalog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.catalog-card {
  background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  transition: var(--transition); position: relative; display: flex; flex-direction: column;
  overflow: hidden;
}
.catalog-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-card); }
.catalog-card.selected { border-color: rgba(229, 0, 45, 0.4); background: rgba(229, 0, 45, 0.03); }

.catalog-card-top { padding: 16px 16px 12px; flex: 1; display: flex; flex-direction: column; }
.catalog-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px; }
.catalog-card-code { font-size: 1.05rem; font-weight: 700; color: var(--text-main); letter-spacing: -0.3px; }
.catalog-card-badges { display: flex; gap: 5px; }
.catalog-card-name { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 12px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

.catalog-card-info { display: flex; align-items: center; justify-content: space-between; }
.catalog-card-stats { display: flex; align-items: center; gap: 6px; }
.card-stat { font-size: 0.7rem; font-weight: 600; color: var(--text-faint); }
.card-stat-sep { color: var(--text-faint); font-size: 0.6rem; }

.catalog-card-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.mode-tag { font-size: 0.62rem; padding: 2px 8px; border-radius: var(--radius-full); font-weight: 600; letter-spacing: 0.3px; text-transform: uppercase; }
.mode-tag.in-person { background: rgba(229, 0, 45, 0.08); color: var(--accent-primary-hover); }
.mode-tag.online { background: rgba(45, 212, 160, 0.08); color: var(--status-success); }
.mode-tag.distance { background: rgba(45, 212, 160, 0.08); color: var(--status-success); }
.mode-tag.hybrid { background: rgba(245, 166, 35, 0.08); color: var(--status-warning); }

.card-schedule-preview { display: flex; gap: 3px; }
.card-day-dot { width: 22px; height: 22px; border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 0.6rem; font-weight: 700; background: var(--bg-base); border: 1px solid var(--border-subtle); color: var(--text-faint); transition: var(--transition); }
.card-day-dot.has-class { background: rgba(229, 0, 45, 0.1); border-color: rgba(229, 0, 45, 0.25); color: var(--accent-primary-hover); }

.catalog-card-bottom { padding: 0 16px 14px; }
.catalog-card-actions { display: flex; gap: 6px; }
.add-btn {
  flex: 1; padding: 8px; border: 1px solid var(--border-subtle); background: var(--bg-base); color: var(--text-muted);
  border-radius: var(--radius-sm); cursor: pointer; font-family: 'Inter', sans-serif; font-size: 0.75rem; font-weight: 600; transition: var(--transition);
}
.add-btn:hover:not(:disabled) { background: var(--bg-surface-elevated); color: var(--text-main); border-color: var(--border-hover); }
.add-btn:active:not(:disabled) { transform: scale(0.97); }
.add-btn.req-btn:hover:not(:disabled) { background: var(--status-error-bg); border-color: rgba(242, 95, 92, 0.2); color: var(--status-error); }
.add-btn.opt-btn:hover:not(:disabled) { background: var(--status-success-bg); border-color: rgba(45, 212, 160, 0.2); color: var(--status-success); }
.add-btn:disabled { opacity: 0.25; cursor: not-allowed; }

.group-btn {
  padding: 8px; border: 1px solid var(--border-subtle); background: var(--bg-base); color: var(--text-muted);
  border-radius: var(--radius-sm); cursor: pointer; font-family: 'Inter', sans-serif; font-size: 0.75rem; font-weight: 600; transition: var(--transition);
  margin-top: 6px;
}
.group-btn:hover { background: var(--bg-surface-elevated); color: var(--text-main); border-color: var(--border-hover); }

/* Group Overlay Overlay */
.group-overlay {
  position: absolute; bottom: 0; left: 0; right: 0; background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle); z-index: 10;
  display: flex; flex-direction: column; padding: 16px;
  transform: translateY(100%); transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  height: 100%;
}
.group-overlay.open { transform: translateY(0); }
.group-overlay-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.group-overlay-title { font-size: 0.8rem; font-weight: 700; color: var(--text-main); }
.group-overlay-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.1rem; padding: 4px; transition: var(--transition); }
.group-overlay-close:hover { color: var(--text-main); }

.group-chips-list { display: flex; flex-wrap: wrap; gap: 6px; overflow-y: auto; align-content: flex-start; flex: 1; padding-bottom: 8px; }
.group-chips-list::-webkit-scrollbar { width: 4px; }
.group-chips-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }
.group-chip { padding: 4px 10px; font-size: 0.72rem; font-weight: 600; border-radius: var(--radius-full); border: 1px solid var(--border-subtle); background: var(--bg-base); color: var(--text-faint); cursor: pointer; transition: var(--transition); }
.group-chip:hover { border-color: var(--border-hover); color: var(--text-main); }
.group-chip.active { background: rgba(229, 0, 45, 0.08); border-color: rgba(229, 0, 45, 0.25); color: var(--accent-primary-hover); }

/* ─── MODAL ─── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.65); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  display: none; align-items: center; justify-content: center; z-index: 1000; padding: 20px;
}
.modal-overlay.active { display: flex; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
  background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  width: 100%; max-width: 480px; box-shadow: var(--shadow-lg); overflow: hidden;
  transform: scale(0.96); transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-overlay.active .modal-content { transform: scale(1); }

.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 18px 22px; border-bottom: 1px solid var(--border-subtle); background: var(--bg-base); }
.modal-header h2 { font-size: 1rem; font-weight: 600; letter-spacing: -0.2px; }
.modal-close { background: none; border: none; color: var(--text-faint); font-size: 1.4rem; cursor: pointer; transition: var(--transition); width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 8px; }
.modal-close:hover { color: var(--text-main); background: rgba(255,255,255,0.05); }
.modal-body { padding: 22px; max-height: 70vh; overflow-y: auto; }
.modal-footer { padding: 18px 22px; border-top: 1px solid var(--border-subtle); background: var(--bg-base); }

.constraint-group label { display: block; font-size: 0.78rem; font-weight: 600; color: var(--text-muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.6px; }
.day-pill-group { display: flex; gap: 6px; justify-content: space-between; }
.day-pill {
  flex: 1; text-align: center; padding: 9px 0; background: var(--bg-base); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); color: var(--text-muted); font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: var(--transition);
}
.day-pill:hover { border-color: var(--border-hover); color: var(--text-main); }
.day-pill.active { background: var(--status-error-bg); border-color: rgba(242, 95, 92, 0.25); color: var(--status-error); }

.toggle-group { display: flex; flex-direction: column; gap: 10px; }
.toggle-row {
  display: flex; justify-content: space-between; align-items: center; padding: 14px; background: var(--bg-base);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-md); cursor: pointer; transition: var(--transition);
}
.toggle-row:hover { border-color: var(--border-hover); }
.toggle-label { font-size: 0.85rem; font-weight: 500; display: flex; align-items: center; gap: 10px; }
.toggle-switch {
  position: relative; width: 42px; height: 22px; background: var(--bg-surface-elevated); border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle); transition: var(--transition); flex-shrink: 0;
}
.toggle-switch::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; background: var(--text-faint);
  border-radius: 50%; transition: var(--transition);
}
.toggle-row.active .toggle-switch { background: var(--accent-primary); border-color: var(--accent-primary); }
.toggle-row.active .toggle-switch::after { background: white; transform: translateX(20px); }

/* ─── RESULTS DASHBOARD ─── */
.nav-bar {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--bg-glass);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); margin-bottom: 20px; flex-wrap: wrap; box-shadow: var(--shadow-card);
}
.nav-group { display: flex; align-items: center; gap: 8px; padding-right: 12px; border-right: 1px solid var(--border-subtle); }
.nav-group:last-child { border-right: none; padding-right: 0; }
.nav-group label { font-size: 0.68rem; font-weight: 600; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.6px; }

.schedule-nav { display: flex; align-items: center; gap: 6px; }
.nav-arrow {
  width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; background: var(--bg-base);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); color: var(--text-main); cursor: pointer; transition: var(--transition); font-size: 1.1rem;
}
.nav-arrow:hover { background: var(--bg-surface-elevated); border-color: var(--border-hover); }
.nav-arrow:active { transform: scale(0.95); }
.schedule-counter { font-size: 0.9rem; font-weight: 700; min-width: 56px; text-align: center; font-variant-numeric: tabular-nums; }
.schedule-counter span { color: var(--text-faint); font-weight: 400; }

.sort-select {
  padding: 7px 30px 7px 14px; border: 1px solid var(--border-subtle); background: var(--bg-base); color: var(--text-main);
  border-radius: var(--radius-full); font-family: 'Inter', sans-serif; font-size: 0.8rem; font-weight: 500; cursor: pointer;
  appearance: none; background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238e8e96' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat; background-position: right 10px center; background-size: 13px; transition: var(--transition); outline: none;
}
.sort-select:hover { border-color: var(--border-hover); }
.sort-select:focus { border-color: var(--accent-primary); }

.quick-jump input {
  width: 46px; padding: 5px; border-radius: var(--radius-sm); background: var(--bg-base); border: 1px solid var(--border-subtle);
  color: var(--text-main); text-align: center; outline: none; font-size: 0.8rem; transition: var(--transition); font-variant-numeric: tabular-nums;
}
.quick-jump input:focus { border-color: var(--accent-primary); }

.export-wrapper { position: relative; }
.export-menu {
  position: absolute; top: calc(100% + 6px); right: 0; background: var(--bg-surface-elevated); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 6px; display: flex; flex-direction: column; gap: 2px; box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transform: translateY(-8px); transition: var(--transition); z-index: 100; min-width: 200px;
}
.export-menu.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
.export-item {
  display: flex; align-items: flex-start; gap: 10px; padding: 10px; border: none; background: transparent; color: var(--text-main);
  text-align: left; cursor: pointer; border-radius: var(--radius-sm); transition: var(--transition); font-family: 'Inter', sans-serif;
}
.export-item:hover { background: rgba(255,255,255,0.04); }
.export-icon { font-size: 1.1rem; }
.export-label { font-size: 0.8rem; font-weight: 600; margin-bottom: 2px; }
.export-desc { font-size: 0.68rem; color: var(--text-muted); }

.fav-badge { background: var(--accent-primary); color: white; padding: 1px 6px; border-radius: 8px; font-size: 0.65rem; margin-left: 4px; font-weight: 700; }

.results-layout { display: grid; grid-template-columns: 280px 1fr; gap: 20px; align-items: start; }
@media (max-width: 1024px) { .results-layout { grid-template-columns: 1fr; } }

.results-sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-section {
  background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-sm);
}
.sidebar-section h3 { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px; color: var(--text-faint); margin-bottom: 14px; }

/* Score - hidden */
.score-section { display: none; }
.score-card, .score-gauge, .score-gauge-bg, .score-gauge-fill, .score-gauge-text, .score-title { display: none; }

.sidebar-fav-btn {
  width: 100%; padding: 9px; background: rgba(255,255,255,0.04); border: 1px solid var(--border-subtle); border-radius: var(--radius-full);
  color: var(--text-main); font-weight: 600; cursor: pointer; transition: var(--transition); font-size: 0.82rem; font-family: 'Inter', sans-serif;
}
.sidebar-fav-btn:hover { background: rgba(255,255,255,0.08); border-color: var(--border-hover); }
.sidebar-fav-btn:active { transform: scale(0.98); }
.sidebar-fav-btn.active { background: rgba(245, 166, 35, 0.12); border-color: rgba(245, 166, 35, 0.3); color: #fbbf24; }

/* Mini Stats */
.mini-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mini-stat { background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 14px; display: flex; flex-direction: column; gap: 3px; }
.mini-stat .stat-val { font-size: 1.05rem; font-weight: 700; color: var(--text-main); font-variant-numeric: tabular-nums; }
.mini-stat .stat-lbl { font-size: 0.65rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }

/* Course Blocks */
.course-blocks { display: flex; flex-direction: column; gap: 8px; }
.course-block {
  padding: 12px; background: var(--bg-base); border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--accent-primary); border-radius: var(--radius-md); display: flex; flex-direction: column; gap: 4px;
}
.course-block-header { display: flex; justify-content: space-between; align-items: center; }
.course-block-code { font-size: 0.85rem; font-weight: 700; color: var(--text-main); letter-spacing: -0.2px; }
.course-block-group { font-size: 0.68rem; color: var(--text-muted); font-weight: 600; background: var(--bg-surface-elevated); padding: 2px 7px; border-radius: var(--radius-full); }
.course-block-name { font-size: 0.75rem; color: var(--text-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Daily Load */
.compact-day-breakdown { display: flex; flex-direction: column; gap: 6px; }
.compact-day-row { display: flex; align-items: center; justify-content: space-between; padding: 9px 12px; background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); font-size: 0.78rem; }
.compact-day-row.empty { opacity: 0.35; border-style: dashed; }
.c-day-lbl { font-weight: 700; color: var(--text-main); width: 36px; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.3px; }
.c-day-times { color: var(--text-muted); flex: 1; text-align: right; margin-right: 10px; font-variant-numeric: tabular-nums; }
.c-day-hrs { font-weight: 700; color: var(--text-main); min-width: 28px; text-align: right; font-variant-numeric: tabular-nums; }

/* ─── CALENDAR ─── */
.results-main { background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 18px; overflow-x: auto; box-shadow: var(--shadow-sm); }
.legend-bar { display: flex; gap: 16px; margin-bottom: 16px; padding: 10px 18px; background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-full); width: fit-content; }
.legend-item { display: flex; align-items: center; gap: 7px; font-size: 0.75rem; color: var(--text-muted); font-weight: 500; }
.legend-dot { width: 10px; height: 10px; border-radius: 3px; }
.legend-dot.in-person { background: linear-gradient(135deg, rgba(229,0,45,0.9), rgba(179,0,35,0.9)); }
.legend-dot.online { background: linear-gradient(135deg, rgba(45,212,160,0.9), rgba(16,185,129,0.9)); }
.legend-dot.hybrid { background: linear-gradient(135deg, rgba(245,166,35,0.9), rgba(217,119,6,0.9)); }

.calendar-grid {
  display: grid; grid-template-columns: 56px repeat(5, 1fr); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); overflow: hidden; font-size: 0.8rem; background: var(--bg-base); min-width: 680px;
}
.calendar-grid.has-saturday { grid-template-columns: 56px repeat(6, 1fr); }
.calendar-header {
  background: var(--bg-surface); color: var(--text-faint); padding: 0 6px; height: var(--header-height);
  font-weight: 700; font-size: 0.68rem; text-align: center; display: flex; align-items: center; justify-content: center;
  border-right: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); text-transform: uppercase; letter-spacing: 0.8px;
}
.time-label {
  background: var(--bg-surface); text-align: center; font-weight: 500; color: var(--text-faint); font-size: 0.65rem;
  border-right: 1px solid var(--border-subtle); border-bottom: 1px solid transparent; display: flex; align-items: center; justify-content: center; height: var(--slot-height); font-variant-numeric: tabular-nums;
}
.time-slot { height: var(--slot-height); border-bottom: 1px solid rgba(255,255,255,0.02); border-right: 1px solid var(--border-subtle); }
.time-slot.hour-mark { border-bottom: 1px solid rgba(255,255,255,0.06); }
.time-slot.alt-row { background: rgba(255,255,255,0.008); }

.calendar-wrapper { position: relative; }
.blocks-overlay { position: absolute; inset: 0; pointer-events: none; }
.class-block {
  position: absolute; padding: 5px 9px; border-radius: 8px; font-size: 0.72rem; overflow: hidden; z-index: 10;
  cursor: pointer; transition: all 0.15s ease; border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 2px 8px rgba(0,0,0,0.25); pointer-events: all; display: flex; flex-direction: column; justify-content: flex-start;
}
.class-block:hover { transform: scale(1.01) translateY(-1px); box-shadow: 0 6px 20px rgba(0,0,0,0.4); z-index: 20; border-color: rgba(255,255,255,0.25); }

.class-block.in-person { background: linear-gradient(135deg, rgba(229,0,45,0.88), rgba(179,0,35,0.88)); color: white; }
.class-block.online { background: linear-gradient(135deg, rgba(45,212,160,0.88), rgba(16,185,129,0.88)); color: white; }
.class-block.hybrid { background: linear-gradient(135deg, rgba(245,166,35,0.88), rgba(217,119,6,0.88)); color: white; }
.class-block.unknown { background: linear-gradient(135deg, rgba(78,78,86,0.88), rgba(58,58,66,0.88)); color: white; }

.class-code { font-weight: 700; font-size: 0.8rem; letter-spacing: -0.2px; margin-bottom: 1px; }
.class-details { font-size: 0.67rem; opacity: 0.88; line-height: 1.3; font-weight: 500; }
.room-tag { font-size: 0.6rem; padding: 1px 5px; background: rgba(0,0,0,0.18); border-radius: 3px; font-weight: 600; margin-top: 3px; display: inline-block; width: fit-content; }
.class-type-badge { font-size: 0.6rem; opacity: 0.8; font-weight: 500; }

.now-line { position: absolute; left: 56px; right: 0; height: 2px; background: var(--status-error); z-index: 15; pointer-events: none; opacity: 0.7; }
.now-line::before { content: ''; position: absolute; left: -3px; top: -3px; width: 8px; height: 8px; background: var(--status-error); border-radius: 50%; }

/* List View */
.list-view { display: none; flex-direction: column; gap: 10px; }
.list-view.active { display: flex; }
.course-card { background: var(--bg-base); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 16px; transition: var(--transition); }
.course-card:hover { border-color: var(--border-hover); }
.course-card-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.course-card-title { font-weight: 700; font-size: 0.95rem; letter-spacing: -0.2px; }
.course-card-name { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.course-card-group { font-size: 0.72rem; color: var(--text-faint); font-weight: 600; background: var(--bg-surface-elevated); padding: 3px 8px; border-radius: var(--radius-full); }
.session-row { display: flex; align-items: center; gap: 12px; padding: 8px 0; border-top: 1px solid var(--border-subtle); font-size: 0.78rem; }
.session-day { font-weight: 600; color: var(--text-main); min-width: 70px; }
.session-time { color: var(--text-muted); font-variant-numeric: tabular-nums; min-width: 100px; }
.session-type { color: var(--text-muted); flex: 1; }
.mode-badge { font-size: 0.65rem; padding: 2px 8px; border-radius: var(--radius-full); font-weight: 600; }
.mode-badge.in-person { background: rgba(229,0,45,0.1); color: var(--accent-primary-hover); }
.mode-badge.online { background: rgba(45,212,160,0.1); color: var(--status-success); }
.mode-badge.hybrid { background: rgba(245,166,35,0.1); color: var(--status-warning); }

.keyboard-hint { text-align: center; margin-top: 20px; color: var(--text-faint); font-size: 0.75rem; }
.keyboard-hint kbd { background: var(--bg-base); border: 1px solid var(--border-subtle); padding: 2px 5px; border-radius: 4px; font-family: 'Inter', monospace; font-size: 0.7rem; color: var(--text-muted); }
.calendar-view.active { display: block; }
.calendar-view { display: block; }

/* ─── TOASTS ─── */
.toast-container { position: fixed; top: 16px; right: 16px; z-index: 2000; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 18px; border-radius: var(--radius-md); font-size: 0.82rem; font-weight: 500; color: white;
  animation: toastIn 0.3s cubic-bezier(0.16, 1, 0.3, 1), toastOut 0.25s ease 2.7s forwards;
  box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,0.08); position: relative; overflow: hidden;
}
.toast.success { background: rgba(45, 212, 160, 0.92); }
.toast.error { background: rgba(242, 95, 92, 0.92); }
.toast.info { background: rgba(229, 0, 45, 0.92); }
.toast::after { content: ''; position: absolute; bottom: 0; left: 0; height: 2px; background: rgba(255,255,255,0.3); animation: toastProgress 3s linear forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(40px); } }
@keyframes toastProgress { from { width: 100%; } to { width: 0%; } }

/* ─── MISC ─── */
.spinner { width: 32px; height: 32px; border: 2px solid var(--border-subtle); border-top-color: var(--accent-primary); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-screen, .error-screen, .generating-overlay {
  position: fixed; inset: 0; background: rgba(8, 8, 10, 0.85); backdrop-filter: blur(12px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; z-index: 1000; gap: 16px;
}
.tooltip {
  position: fixed; background: var(--bg-surface-elevated); border: 1px solid var(--border-subtle); border-radius: var(--radius-md);
  padding: 12px 16px; z-index: 2000; pointer-events: none; box-shadow: var(--shadow-lg);
  min-width: 200px; opacity: 0; transform: translateY(4px); transition: opacity 0.12s, transform 0.12s;
}
.tooltip.visible { opacity: 1; transform: translateY(0); }
.tooltip-code { font-weight: 700; font-size: 0.88rem; margin-bottom: 3px; color: var(--text-main); }
.tooltip-name { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 6px; }
.tooltip-detail { font-size: 0.72rem; color: var(--text-faint); line-height: 1.5; white-space: pre-line; }

.app-footer { text-align: center; padding: 36px 20px; color: var(--text-faint); font-size: 0.75rem; border-top: 1px solid var(--border-subtle); margin-top: 48px; }
.app-footer a { color: var(--accent-primary); text-decoration: none; transition: var(--transition); }
.app-footer a:hover { color: var(--accent-primary-hover); }

/* Group chips - handled by .group-details above */

/* Restore banner */
.restore-banner { background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 14px 18px; margin-bottom: 16px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.restore-text { font-size: 0.85rem; color: var(--text-muted); }
.restore-actions { display: flex; gap: 8px; }
.restore-btn { padding: 7px 16px; border-radius: var(--radius-full); font-size: 0.8rem; font-weight: 600; cursor: pointer; border: 1px solid var(--border-subtle); transition: var(--transition); font-family: 'Inter', sans-serif; }
.restore-btn.primary { background: var(--accent-gradient); color: white; border: none; }
.restore-btn.secondary { background: var(--bg-base); color: var(--text-muted); }

/* Conflict warning */
.conflict-warning { padding: 10px 14px; background: rgba(245,166,35,0.06); border: 1px solid rgba(245,166,35,0.15); border-radius: var(--radius-md); font-size: 0.8rem; color: var(--status-warning); }

/* Constraint badge */
.constraint-badge { background: var(--accent-primary); color: white; font-size: 0.65rem; padding: 1px 6px; border-radius: 8px; font-weight: 700; margin-left: 4px; }

/* Range */
.range-group { margin-top: 24px; }
.range-group label { display: block; font-size: 0.78rem; font-weight: 600; color: var(--text-muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.6px; }
.range-row { display: flex; align-items: center; gap: 14px; }
.range-row input[type="range"] { flex: 1; accent-color: var(--accent-primary); }
.range-value { font-size: 0.85rem; font-weight: 600; color: var(--text-main); min-width: 60px; text-align: right; }

.catalog-empty { text-align: center; padding: 40px 20px; color: var(--text-faint); font-size: 0.88rem; }

/* Animate in */
.animate-in { animation: slideUpFade 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

/* ─── RESPONSIVE DESIGN (MOBILE & TABLET) ─── */
@media (max-width: 768px) {
  /* General Layout */
  .app { padding: 12px; }
  .app-header { padding: 32px 16px 24px; }
  .app-header h1 { font-size: 1.8rem; }
  .app-header p { font-size: 0.85rem; }

  /* Config Phase */
  .config-panel { padding: 20px; }
  .feature-cards { flex-direction: column; gap: 12px; }
  .feature-card { padding: 16px; }

  /* Selection Phase */
  .selection-summary { 
    position: relative; /* Un-stick on mobile so it doesn't block the screen */
    top: 0;
    padding: 14px;
    margin-bottom: 16px;
  }
  .summary-config { flex-direction: column; align-items: stretch; gap: 12px; }
  .summary-config .config-item, .summary-config .config-info { justify-content: center; text-align: center; }
  .summary-config .opt-btn { width: 100%; justify-content: center; margin-left: 0 !important; }
  .summary-config .generate-btn { width: 100%; justify-content: center; margin-top: 4px; }
  
  .search-input { padding-left: 36px; }
  .search-icon { left: 12px; }

  .catalog-grid { grid-template-columns: 1fr; }

  /* Results Phase */
  .nav-bar { padding: 12px; flex-direction: column; align-items: stretch; gap: 12px; }
  .nav-group { 
    border-right: none; 
    padding-right: 0; 
    padding-bottom: 12px; 
    border-bottom: 1px solid var(--border-subtle); 
    justify-content: space-between;
  }
  .nav-group:last-child { border-bottom: none; padding-bottom: 0; }
  .export-wrapper { align-self: stretch; width: 100%; display: flex; flex-direction: column; }
  .export-wrapper .pill-btn { justify-content: center; width: 100%; }
  .export-menu { width: 100%; top: calc(100% + 4px); right: auto; left: 0; }

  .results-sidebar { margin-bottom: 16px; width: 100%; }
  .legend-bar { flex-wrap: wrap; justify-content: center; padding: 10px; border-radius: var(--radius-md); }
  
  /* Make Calendar Fit Screen */
  .results-main { padding: 12px; }
  .calendar-grid { min-width: 0; width: 100%; grid-template-columns: 40px repeat(5, 1fr); }
  .calendar-grid.has-saturday { grid-template-columns: 40px repeat(6, 1fr); }
  .calendar-header { padding: 0 2px; font-size: 0.55rem; letter-spacing: 0; }
  .time-label { font-size: 0.6rem; }
  .class-block { padding: 2px 4px; border-radius: 4px; }
  .class-code { font-size: 0.65rem; }
  .class-details { font-size: 0.55rem; line-height: 1.1; }
  .room-tag { font-size: 0.5rem; padding: 1px 3px; }
  .class-type-badge { font-size: 0.5rem; }
  
  /* Modals */
  .modal-overlay { padding: 12px; align-items: flex-end; } /* Bottom sheet style */
  .modal-content { max-height: 90vh; border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
  .modal-body { padding: 16px; max-height: calc(90vh - 140px); }
  .day-pill-group { flex-wrap: wrap; gap: 8px; }
  .day-pill { flex-basis: calc(33.333% - 6px); }

  /* Toasts */
  .toast-container { left: 16px; right: 16px; top: 16px; align-items: stretch; }
  .toast { text-align: center; animation: toastInMobile 0.3s cubic-bezier(0.16, 1, 0.3, 1), toastOutMobile 0.25s ease 2.7s forwards; }
}

@keyframes toastInMobile { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOutMobile { to { opacity: 0; transform: translateY(-20px); } }

@media (max-width: 480px) {
  .app-header h1 { font-size: 1.5rem; }
  .calendar-header { font-size: 0.6rem; letter-spacing: 0; padding: 0 2px; }
  .time-label { font-size: 0.6rem; }
  .mini-stats { grid-template-columns: 1fr; }
}

@media (max-width: 1024px) { 
  .results-layout { display: flex; flex-direction: column-reverse; gap: 16px; }
  .results-main { width: 100%; }
}

@media (hover: none) and (pointer: coarse), (max-width: 1024px) {
  .config-panel, .selection-summary, .nav-bar, .modal-overlay, .loading-screen, .generating-overlay, .error-screen {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: var(--bg-surface) !important;
  }
}