/* ============================================================
   TNPSC Tamil Translation Tool — style.css
   Color palette: Deep crimson #8B0000 primary, clean whites
   ============================================================ */

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

:root {
  --primary: #8B0000;
  --primary-dark: #6a0000;
  --primary-light: #fff5f5;
  --primary-border: #f5c6c6;
  --success: #1D9E75;
  --danger-bg: #FCEBEB;
  --danger-text: #A32D2D;

  --bg: #f5f4f0;
  --surface: #ffffff;
  --surface-2: #f9f8f6;
  --border: rgba(0,0,0,0.10);
  --border-strong: rgba(0,0,0,0.18);

  --text-primary: #1a1a1a;
  --text-secondary: #5a5a5a;
  --text-tertiary: #9a9a9a;

  --font: 'Segoe UI', 'Noto Sans Tamil', system-ui, -apple-system, sans-serif;
  --font-tamil: 'Noto Sans Tamil', 'Latha', 'Vijaya', sans-serif;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --shadow-card: 0 1px 3px rgba(0,0,0,0.07), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-btn: 0 1px 2px rgba(139,0,0,0.25);
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── HEADER ─────────────────────────────────────────────── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.9rem 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-badge {
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.site-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.site-sub {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

.subject-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.subject-tags span {
  font-size: 11px;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 2px 8px;
  border-radius: 20px;
}

/* ── MAIN LAYOUT ─────────────────────────────────────────── */
.main-layout {
  max-width: 1280px;
  margin: 1.5rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  flex: 1;
}

@media (max-width: 900px) {
  .main-layout { grid-template-columns: 1fr; }
}

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.output-card {
  min-height: 480px;
}

.card-heading {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 7px;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.card-heading i { font-size: 16px; color: var(--primary); }

/* ── TABS ────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 3px;
}

.tab {
  flex: 1;
  font-size: 12px;
  font-weight: 500;
  padding: 7px 8px;
  border-radius: calc(var(--radius-md) - 2px);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.tab:hover { color: var(--text-primary); background: rgba(0,0,0,0.04); }

.tab.active {
  background: var(--surface);
  color: var(--primary);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0,0,0,0.10);
}

.tab i { font-size: 14px; }

/* ── PANELS ──────────────────────────────────────────────── */
.panel { display: none; flex-direction: column; gap: 8px; }
.panel.active { display: flex; }

/* ── FIELD LABELS ────────────────────────────────────────── */
.field-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 4px;
}

/* ── TEXTAREA ────────────────────────────────────────────── */
.input-textarea {
  width: 100%;
  min-height: 200px;
  padding: 10px 12px;
  font-size: 13px;
  line-height: 1.7;
  resize: vertical;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  font-family: var(--font);
  transition: border-color 0.15s;
}

.input-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139,0,0,0.08);
}

.char-count {
  font-size: 11px;
  color: var(--text-tertiary);
  text-align: right;
}

/* ── FILE DROP ───────────────────────────────────────────── */
.file-drop {
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1.75rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: var(--surface-2);
  user-select: none;
}

.file-drop:hover, .file-drop.drag {
  border-color: var(--primary);
  background: var(--primary-light);
}

.file-drop i {
  font-size: 30px;
  color: var(--text-tertiary);
  display: block;
  margin-bottom: 8px;
}

.file-drop p {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.file-drop span {
  font-size: 11px;
  color: var(--text-tertiary);
  display: block;
  margin-top: 4px;
}

#file-input { display: none; }

.file-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--primary);
  padding: 6px 10px;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-sm);
}

.file-name i { font-size: 15px; }

.clear-btn {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  font-size: 13px;
  line-height: 1;
  padding: 2px;
  display: flex;
  align-items: center;
}

.clear-btn:hover { color: var(--danger-text); }

.divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ── TIPS ────────────────────────────────────────────────── */
.tips-intro {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 8px 12px;
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tips-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.tips-list li i {
  font-size: 14px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 1px;
}

.tips-list li strong {
  font-family: var(--font-tamil);
  color: var(--primary);
}

.subject-coverage {
  font-size: 11px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  padding-top: 8px;
}

/* ── OPTIONS ROW ─────────────────────────────────────────── */
.opts-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.opt-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 11px;
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  background: var(--surface-2);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  user-select: none;
}

.opt-chip input[type="checkbox"] {
  accent-color: var(--primary);
  width: 13px;
  height: 13px;
  cursor: pointer;
}

.opt-chip:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

/* ── TRANSLATE BUTTON ────────────────────────────────────── */
.translate-btn {
  width: 100%;
  padding: 11px 16px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-btn);
  transition: background 0.15s, transform 0.1s, box-shadow 0.1s;
}

.translate-btn i { font-size: 17px; }
.translate-btn:hover { background: var(--primary-dark); }
.translate-btn:active { transform: scale(0.99); box-shadow: none; }
.translate-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
  box-shadow: none;
}

/* ── LOADING ─────────────────────────────────────────────── */
.loading-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 12px;
  color: var(--text-secondary);
}

.spinner {
  display: inline-block;
  width: 13px;
  height: 13px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── ERROR ───────────────────────────────────────────────── */
.err-box {
  color: var(--danger-text);
  font-size: 13px;
  padding: 10px 14px;
  background: var(--danger-bg);
  border: 1px solid #f5c6c6;
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: 7px;
  line-height: 1.5;
}

.err-box i { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

/* ── OUTPUT AREA ─────────────────────────────────────────── */
.output-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
}

.action-btn {
  font-size: 12px;
  color: var(--text-secondary);
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background 0.12s, color 0.12s;
}

.action-btn:hover { background: var(--surface-2); color: var(--text-primary); }
.action-btn.copied { color: var(--success); border-color: var(--success); }

.output-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-tertiary);
  gap: 8px;
  padding: 3rem 1rem;
}

.output-empty i { font-size: 40px; }
.output-empty p { font-size: 14px; color: var(--text-secondary); }
.output-empty span { font-size: 12px; }

.output-box {
  display: none;
  flex: 1;
  overflow-y: auto;
  max-height: 620px;
}

/* Question blocks inside output */
.q-block {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.q-block:last-child { border-bottom: none; }

.q-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.q-en {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.q-ta {
  font-size: 14px;
  line-height: 1.9;
  color: var(--primary);
  font-family: var(--font-tamil);
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
  padding: 8px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.opt-en, .opt-ta {
  display: block;
  margin-left: 4px;
}

.opt-ta { color: var(--primary-dark); }

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 1rem 2rem;
  font-size: 11px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

/* ── SCROLLBAR ───────────────────────────────────────────── */
.output-box::-webkit-scrollbar { width: 5px; }
.output-box::-webkit-scrollbar-track { background: transparent; }
.output-box::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 600px) {
  .site-header { padding: 0.75rem 1rem; }
  .subject-tags { display: none; }
  .main-layout { padding: 0 0.75rem; margin: 1rem auto; }
  .card { padding: 1rem; }
  .opts-row { gap: 6px; }
  .opt-chip { font-size: 11px; padding: 5px 9px; }
}

/* ════════════════════════════════════════════════════════════
   AUTH / CREDITS / ADMIN / MODAL
   ════════════════════════════════════════════════════════════ */

/* ── Header actions (credit chip, buy, admin, logout) ────── */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.credit-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-dark);
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 6px 10px;
  border-radius: 20px;
  transition: background 0.2s, color 0.2s;
}
.credit-chip i { font-size: 14px; }
.credit-chip.credit-low {
  background: var(--danger-bg);
  color: var(--danger-text);
  border-color: #e7a5a5;
}

.buy-btn { color: var(--primary); border-color: var(--primary-border); background: var(--primary-light); }
.buy-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

#logout-btn { gap: 4px; }
#user-label { max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Auth page (login/register) ──────────────────────────── */
.auth-page {
  background: linear-gradient(135deg, var(--bg) 0%, #ece8e0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-shell {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
}

.auth-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.auth-tabs {
  display: flex;
  background: var(--surface-2);
  padding: 4px;
  border-radius: var(--radius-md);
}

.auth-tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 9px 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.18s;
}
.auth-tab.active {
  background: var(--surface);
  color: var(--primary);
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.auth-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}
.auth-field label .muted { font-weight: 400; color: var(--text-tertiary); }
.auth-field input {
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  transition: border-color 0.18s, box-shadow 0.18s;
}
.auth-field input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139,0,0,0.08);
}

.auth-error {
  background: var(--danger-bg);
  color: var(--danger-text);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.4;
}

.auth-hint {
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 4px;
}
.auth-hint a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}
.auth-hint a:hover { text-decoration: underline; }

/* ── Buy credits page ────────────────────────────────────── */
.buy-layout { grid-template-columns: 1fr; max-width: 880px; }

.buy-card .card-heading { font-size: 16px; }
.buy-intro {
  color: var(--text-secondary);
  font-size: 13px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0.5rem;
}
@media (max-width: 760px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

.pricing-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s;
}
.pricing-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-border);
  box-shadow: 0 4px 16px rgba(139,0,0,0.08);
}
.pricing-credits {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}
.pricing-credits-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.pricing-price {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}
.pricing-per {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}
.pricing-btn { margin-top: auto; }

.buy-success {
  background: #E6F4EF;
  color: #146E4F;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  line-height: 1.4;
}

/* ── Modal ───────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}
.modal-body {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 48px rgba(0,0,0,0.2);
  padding: 1.5rem;
  max-width: 480px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.modal-title i { font-size: 20px; }
.modal-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}
.modal-actions .action-btn,
.modal-actions .translate-btn { width: auto; }

/* ── Admin tables ────────────────────────────────────────── */
.admin-layout { grid-template-columns: 1fr; max-width: 1280px; }
.admin-card .card-heading { justify-content: space-between; }
.admin-card .card-heading .action-btn { margin-left: auto; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.admin-table th {
  background: var(--surface-2);
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 11px;
}
.admin-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--surface-2); }
.admin-table code {
  font-family: ui-monospace, monospace;
  font-size: 11px;
  background: var(--surface-2);
  padding: 2px 5px;
  border-radius: 4px;
}

.badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge-admin       { background: var(--primary); color: #fff; }
.badge-success     { background: #E6F4EF; color: #146E4F; }
.badge-pending     { background: #FFF4E0; color: #8A5A00; }
.badge-failed      { background: var(--danger-bg); color: var(--danger-text); }
.badge-signup_bonus,
.badge-admin_adjust { background: #EEF2FF; color: #3D4ED1; }
.badge-purchase    { background: #E6F4EF; color: #146E4F; }
.badge-usage       { background: var(--primary-light); color: var(--primary); }
.badge-refund      { background: #FFF4E0; color: #8A5A00; }

/* Make action-btn align nicely with chips in header */
.header-actions .action-btn {
  font-size: 12px;
  padding: 6px 10px;
}