/* ── Reset & base ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface2: #263348;
  --border: #334155;
  --text: #f1f5f9;
  --subtext: #94a3b8;
  --gold: #d4a843;
  --gold-light: #fef3c7;
  --gold-dim: rgba(212,168,67,0.15);
  --blue: #3b82f6;
  --blue-light: #dbeafe;
  --blue-dim: rgba(59,130,246,0.15);
  --error: #ef4444;
  --success: #22c55e;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --transition: 0.2s ease;
}

html { height: 100%; font-size: 16px; }

body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

#app { height: 100%; display: flex; flex-direction: column; }

/* ── Screens ──────────────────────────────────── */
.screen {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}
.screen.active { display: flex; }

/* ── Shared header ────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.app-header h1 { font-size: 1.1rem; font-weight: 600; }
.btn-icon {
  background: none;
  border: none;
  color: var(--subtext);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.btn-icon:hover { color: var(--text); background: var(--surface2); }

/* ── Scrollable body ──────────────────────────── */
.screen-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 24px 20px;
}

/* ── Landing ──────────────────────────────────── */
#screen-landing .app-header { justify-content: flex-end; background: transparent; border: none; }

.landing-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 20px 20px;
  flex-shrink: 0;
}
.landing-hero .logo { font-size: 2.4rem; font-weight: 800; letter-spacing: -1px; }
.landing-hero .tagline { color: var(--subtext); font-size: 0.9rem; margin-top: 4px; }

.track-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px 20px 32px;
  flex: 1;
  align-content: start;
}

.track-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 28px 16px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  background: var(--surface);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  text-align: center;
  min-height: 180px;
}
.track-card:active { transform: scale(0.97); }

.track-card[data-track="judaicas"] {
  border-color: var(--gold);
  background: linear-gradient(145deg, var(--surface) 0%, var(--gold-dim) 100%);
}
.track-card[data-track="judaicas"]:hover { box-shadow: 0 0 0 3px var(--gold-dim), var(--shadow); }

.track-card[data-track="regulares"] {
  border-color: var(--blue);
  background: linear-gradient(145deg, var(--surface) 0%, var(--blue-dim) 100%);
}
.track-card[data-track="regulares"]:hover { box-shadow: 0 0 0 3px var(--blue-dim), var(--shadow); }

.track-icon { font-size: 2.4rem; }

.track-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}
.track-card[data-track="judaicas"] .track-name { color: var(--gold); }
.track-card[data-track="regulares"] .track-name { color: var(--blue); }

.track-subjects {
  font-size: 0.72rem;
  color: var(--subtext);
  line-height: 1.5;
}

/* ── Input screen ─────────────────────────────── */
.input-track-badge {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
}
.badge-judaicas { background: var(--gold-dim); color: var(--gold); border: 1px solid var(--gold); }
.badge-regulares { background: var(--blue-dim); color: var(--blue); border: 1px solid var(--blue); }

/* Subject selector */
.subject-row {
  margin-bottom: 20px;
}
.subject-row label { font-size: 0.82rem; color: var(--subtext); display: block; margin-bottom: 6px; }
.subject-row select {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
  cursor: pointer;
}

/* Input tabs */
.input-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.input-tabs::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  padding: 7px 14px;
  border-radius: 99px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--subtext);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.tab-btn.active, .tab-btn:hover { background: var(--surface2); color: var(--text); }
.tab-btn.active { border-color: var(--text); }

.tab-judaicas .tab-btn.active { border-color: var(--gold); color: var(--gold); background: var(--gold-dim); }
.tab-regulares .tab-btn.active { border-color: var(--blue); color: var(--blue); background: var(--blue-dim); }

/* Tab content */
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* Drop zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--surface);
  position: relative;
}
.drop-zone.dragover { border-color: var(--blue); background: var(--blue-dim); }
.drop-zone-placeholder { pointer-events: none; }
.drop-zone-icon { font-size: 2.4rem; display: block; margin-bottom: 10px; }
.drop-zone p { color: var(--subtext); font-size: 0.88rem; margin-bottom: 4px; }
.drop-zone .small { font-size: 0.75rem; }

.btn-choose {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 20px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.88rem;
  cursor: pointer;
  pointer-events: all;
  transition: background var(--transition);
}
.btn-choose:hover { background: var(--border); }

.file-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--surface2);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
}
.file-preview-name { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn-remove {
  background: none;
  border: none;
  color: var(--error);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 4px;
  flex-shrink: 0;
}

/* Text input */
#text-input {
  width: 100%;
  min-height: 200px;
  padding: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.6;
  resize: vertical;
  font-family: inherit;
}
#text-input:focus { outline: none; border-color: var(--blue); }

/* Google panels */
.google-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 28px 16px;
  background: var(--surface);
  border-radius: var(--radius);
  text-align: center;
}
.google-panel p { color: var(--subtext); font-size: 0.85rem; max-width: 280px; }
.google-logo { font-size: 2rem; }

.btn-google {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 22px;
  background: #fff;
  color: #3c4043;
  border: 1px solid #dadce0;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: box-shadow var(--transition);
}
.btn-google:hover { box-shadow: 0 1px 6px rgba(0,0,0,0.25); }
.btn-google svg { width: 18px; height: 18px; flex-shrink: 0; }

/* Course / assignment picker */
.picker-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
  max-height: 300px;
  overflow-y: auto;
}
.picker-item {
  padding: 12px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background var(--transition), border-color var(--transition);
  text-align: left;
  color: var(--text);
}
.picker-item:hover, .picker-item.selected { background: var(--surface); border-color: var(--blue); }
.picker-item .item-sub { font-size: 0.75rem; color: var(--subtext); margin-top: 2px; }

.section-label {
  font-size: 0.78rem;
  color: var(--subtext);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 16px 0 8px;
}

/* Depth toggle */
.depth-toggle {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}
.toggle-switch {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--transition);
}
.toggle-track::before {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition);
}
.toggle-switch input:checked + .toggle-track { background: var(--gold); }
.toggle-switch input:checked + .toggle-track::before { transform: translateX(20px); }
.depth-label { font-size: 0.9rem; color: var(--subtext); }

/* Submit area */
.input-submit {
  padding: 16px 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.error-msg {
  color: var(--error);
  font-size: 0.83rem;
  margin-bottom: 10px;
  display: none;
}
.error-msg.visible { display: block; }

/* Primary button */
.btn-primary {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}
.btn-primary:active { transform: scale(0.98); opacity: 0.9; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-judaicas { background: var(--gold); color: #0f172a; }
.btn-regulares { background: var(--blue); color: white; }

/* ── Processing screen ────────────────────────── */
#screen-processing {
  align-items: center;
  justify-content: center;
  gap: 20px;
}
.spinner {
  width: 48px; height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.spinner.spinner-gold { border-top-color: var(--gold); }
@keyframes spin { to { transform: rotate(360deg); } }
#processing-msg { color: var(--subtext); font-size: 0.95rem; }

/* ── Output screen ────────────────────────────── */
.draft-banner {
  background: linear-gradient(90deg, #d97706 0%, #b45309 100%);
  color: white;
  text-align: center;
  padding: 9px 20px;
  font-size: 0.82rem;
  font-weight: 600;
  flex-shrink: 0;
}

.output-layout {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
}

/* On wider screens: side by side */
@media (min-width: 768px) {
  .output-panels { flex-direction: row; }
  .output-panel { width: 50%; }
}

.output-panels {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  gap: 0;
}
.output-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.panel-header {
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--subtext);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.panel-header.judaicas-header { color: var(--gold); }
.panel-header.regulares-header { color: var(--blue); }

.content-box {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px;
  font-size: 0.93rem;
  line-height: 1.7;
  white-space: pre-wrap;
  background: var(--bg);
}
.content-box.editable {
  background: var(--surface);
  border-left: 3px solid var(--blue);
  outline: none;
}
.content-box.editable:focus { border-left-color: var(--gold); }

@media (min-width: 768px) {
  .output-panels { flex-direction: row; }
  .output-panel { overflow: hidden; }
  .output-panel:first-child { border-right: 1px solid var(--border); }
}

/* ── Output actions ───────────────────────────── */
.output-actions {
  display: flex;
  gap: 10px;
  padding: 14px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.btn-action {
  flex: 1;
  min-width: 80px;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
}
.btn-action:hover { background: var(--border); }
.btn-action.copied { border-color: var(--success); color: var(--success); }

/* ── Settings modal ───────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.15s ease;
}
.modal-overlay.hidden { display: none; }
@keyframes fadeIn { from { opacity: 0; } }

.modal-sheet {
  background: var(--surface);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.2s ease;
  padding-bottom: env(safe-area-inset-bottom);
}
@keyframes slideUp { from { transform: translateY(40px); opacity: 0; } }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 0;
}
.modal-header h2 { font-size: 1.1rem; font-weight: 700; }

.modal-body { padding: 20px; display: flex; flex-direction: column; gap: 16px; }

.field label {
  display: block;
  font-size: 0.78rem;
  color: var(--subtext);
  font-weight: 600;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.field input {
  width: 100%;
  padding: 11px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.93rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
}
.field input:focus { outline: none; border-color: var(--blue); }
.field-hint { font-size: 0.75rem; color: var(--subtext); margin-top: 5px; }

.modal-footer { padding: 0 20px 20px; }
.save-btn {
  width: 100%;
  padding: 13px;
  background: var(--blue);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity var(--transition);
}
.save-btn:hover { opacity: 0.9; }
.save-confirm { color: var(--success); font-size: 0.82rem; text-align: center; margin-top: 8px; display: none; }
.save-confirm.visible { display: block; }

/* ── Toast ────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(env(safe-area-inset-bottom) + 80px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: 0.85rem;
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  white-space: nowrap;
  z-index: 200;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Misc ─────────────────────────────────────── */
.hidden { display: none !important; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 12px 0;
}

/* Safe area for iPhone notch / home bar */
#screen-landing { padding-bottom: env(safe-area-inset-bottom); }