/* ── Bottom Navigation ───────────────────────────────────── */
#bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  max-width: 480px;
  margin: 0 auto;
  height: calc(var(--nav-height) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  z-index: 100;
  box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
}

.nav-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--color-muted);
  transition: color var(--trans-fast);
  min-height: 48px;
  position: relative;
}

.nav-tab::after {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 0; height: 3px;
  background: var(--color-primary);
  border-radius: 0 0 4px 4px;
  transition: width var(--trans-fast);
}

.nav-tab.active { color: var(--color-primary); }
.nav-tab.active::after { width: 36px; }

.nav-icon {
  font-size: 1.4rem;
  line-height: 1;
}

.nav-label {
  font-family: var(--font-tamil);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* ── Hamburger button (top-left fixed) ───────────────────── */
.menu-btn {
  position: fixed;
  top: calc(10px + env(safe-area-inset-top));
  left: 10px;
  width: 44px;
  height: 44px;
  background: #ffffff;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  z-index: 90;
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
  border: 1px solid rgba(0,0,0,0.06);
}
.menu-btn:active {
  transform: scale(0.94);
  box-shadow: 0 1px 4px rgba(0,0,0,0.22);
}
.menu-btn-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: #1A237E;
  border-radius: 2px;
  transition: transform var(--trans-fast), opacity var(--trans-fast);
}

/* ── Drawer backdrop ─────────────────────────────────────── */
.menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1000;
  opacity: 0;
  transition: opacity 220ms ease-out;
}
.menu-backdrop.visible { opacity: 1; }
.menu-backdrop[hidden] { display: none; }

/* ── Drawer (slides from left) ───────────────────────────── */
.menu-drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 80%;
  max-width: 320px;
  background: #ffffff;
  z-index: 1001;
  box-shadow: 4px 0 20px rgba(0,0,0,0.2);
  transform: translateX(-100%);
  transition: transform 260ms cubic-bezier(0.32, 0.72, 0.24, 1);
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}
.menu-drawer.open { transform: translateX(0); }

.menu-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 16px 14px;
  border-bottom: 1px solid #EEEEEE;
  background: linear-gradient(135deg, #1A237E 0%, #283593 100%);
  color: #ffffff;
}

/* ── Drawer + sheet headers MATCH the page the user is on ─────
   Bus stays navy (default above); other sections tint the menu to
   their own identity colour. body[data-section] is kept in sync by
   the bottom-nav switcher in app.js. */
body[data-section="auto"] .menu-drawer-header,
body[data-section="auto"] .menu-sheet-header {
  background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
}
body[data-section="hospital"] .menu-drawer-header,
body[data-section="hospital"] .menu-sheet-header {
  background: linear-gradient(135deg, #00838F 0%, #006064 100%);
}
body[data-section="emergency"] .menu-drawer-header,
body[data-section="emergency"] .menu-sheet-header {
  background: linear-gradient(135deg, #C62828 0%, #8E1B1B 100%);
}
body[data-section="more"] .menu-drawer-header,
body[data-section="more"] .menu-sheet-header {
  background: linear-gradient(135deg, #5E35B1 0%, #3949AB 100%);
}

/* The refresh toast ("✅ புதுப்பிக்கப்பட்டது") also wears the page colour */
body[data-section="bus"] .app-toast       { background: #1A237E; }
body[data-section="auto"] .app-toast      { background: #B45309; }
body[data-section="hospital"] .app-toast  { background: #006064; }
body[data-section="emergency"] .app-toast { background: #8E1B1B; }
body[data-section="more"] .app-toast      { background: #3C2E85; }
.menu-drawer-title {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.menu-drawer-title-ta {
  font-family: var(--font-tamil);
  font-size: 1.15rem;
  font-weight: 700;
}
.menu-drawer-title-en {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  opacity: 0.78;
}
.menu-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: #ffffff;
  font-size: 24px;
  line-height: 1;
  background: rgba(255,255,255,0.15);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.menu-close:active { background: rgba(255,255,255,0.28); }

.menu-drawer-nav {
  flex: 1;
  padding: 8px 0;
  overflow-y: auto;
}
.menu-item {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  min-height: 58px;
  background: none;
  text-align: left;
  transition: background var(--trans-fast);
}
.menu-item:active { background: #F4F6FA; }
.menu-item-icon { font-size: 22px; line-height: 1; flex-shrink: 0; }
.menu-item-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.menu-item-ta {
  font-family: var(--font-tamil);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}
.menu-item-en {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  color: var(--color-muted);
}
.menu-item-caret {
  font-size: 20px;
  color: var(--color-muted);
  flex-shrink: 0;
}

.menu-drawer-footer {
  padding: 12px 16px;
  border-top: 1px solid #EEEEEE;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-family: var(--font-latin);
  font-size: 0.7rem;
  color: var(--color-muted);
  text-align: center;
}

/* ── Sheet (fullscreen, slides from right) ──────────────── */
.menu-sheet {
  position: fixed;
  inset: 0;
  background: #F2F3F7;
  z-index: 1100;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 260ms cubic-bezier(0.32, 0.72, 0.24, 1);
  max-width: 480px;
  margin: 0 auto;
  padding-bottom: env(safe-area-inset-bottom);
}
.menu-sheet.open { transform: translateX(0); }
.menu-sheet[hidden] { display: none; }

.menu-sheet-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: calc(10px + env(safe-area-inset-top)) 12px 10px;
  background: #1A237E;
  color: #ffffff;
  z-index: 2;
  box-shadow: 0 2px 6px rgba(0,0,0,0.12);
}
.menu-sheet-back {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: #ffffff;
  font-size: 28px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.12);
}
.menu-sheet-back:active { background: rgba(255,255,255,0.25); }
.menu-sheet-title {
  font-family: var(--font-tamil);
  font-size: 1.05rem;
  font-weight: 700;
  flex: 1;
}

.menu-sheet-body {
  flex: 1;
  padding: 16px;
}

.sheet-intro {
  font-family: var(--font-tamil);
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 4px;
}
.sheet-intro-en {
  font-family: var(--font-latin);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 18px;
}

/* Feedback form */
.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.feedback-field { display: flex; flex-direction: column; gap: 6px; }
.feedback-label {
  font-family: var(--font-tamil);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text);
}
.feedback-optional {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  color: var(--color-muted);
  font-weight: 400;
  margin-left: 4px;
}
.feedback-required { color: #D32F2F; margin-left: 2px; }
.feedback-input {
  width: 100%;
  padding: 12px 14px;
  background: #ffffff;
  border: 1.5px solid #E0E0E0;
  border-radius: 12px;
  color: var(--color-text);
  font-family: var(--font-tamil);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--trans-fast);
}
.feedback-input:focus { border-color: #1A237E; }
.feedback-textarea { resize: vertical; min-height: 110px; }
.feedback-submit {
  width: 100%;
  padding: 14px;
  background: #1A237E;
  color: #ffffff;
  border-radius: 14px;
  font-family: var(--font-tamil);
  font-size: 1rem;
  font-weight: 700;
  min-height: 50px;
  transition: transform var(--trans-fast), background var(--trans-fast);
}
.feedback-submit:active { transform: scale(0.97); background: #283593; }
.feedback-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.feedback-result {
  font-family: var(--font-tamil);
  font-size: 0.9rem;
  text-align: center;
  padding: 10px 14px;
  border-radius: 10px;
}
.feedback-result.ok  { background: #E8F5E9; color: #1B5E20; }
.feedback-result.err { background: #FFEBEE; color: #C62828; }

/* About page */
.about-hero {
  text-align: center;
  padding: 24px 16px 20px;
  background: #ffffff;
  border-radius: 16px;
  margin-bottom: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.about-emoji { font-size: 48px; margin-bottom: 8px; }
.about-title {
  font-family: var(--font-tamil);
  font-size: 1.4rem;
  font-weight: 800;
  color: #1A237E;
  margin-bottom: 4px;
}
.about-sub {
  font-family: var(--font-tamil);
  font-size: 0.9rem;
  color: var(--color-muted);
}
.about-sub-en {
  font-family: var(--font-latin);
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 2px;
}
.about-section {
  background: #ffffff;
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.about-section h4 {
  font-family: var(--font-tamil);
  font-size: 1rem;
  font-weight: 700;
  color: #1A237E;
  margin-bottom: 6px;
}
.about-section p {
  font-family: var(--font-tamil);
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text);
  margin-bottom: 4px;
}
.about-contact {
  font-family: var(--font-latin);
  font-size: 0.85rem;
  color: #1A237E;
  margin-top: 4px;
}
.about-list {
  list-style: none;
  padding: 0;
  margin: 6px 0 0;
}
.about-list li {
  font-family: var(--font-tamil);
  font-size: 0.9rem;
  line-height: 1.6;
  padding: 3px 0;
  color: var(--color-text);
}

/* How-to-use steps */
.howto-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.howto-step {
  display: flex;
  gap: 12px;
  background: #ffffff;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.howto-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #1A237E;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-latin);
  font-size: 0.95rem;
  font-weight: 700;
  flex-shrink: 0;
}
.howto-text { flex: 1; min-width: 0; }
.howto-text h4 {
  font-family: var(--font-tamil);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}
.howto-text p {
  font-family: var(--font-tamil);
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--color-text-2, #424242);
}
.howto-text b { color: #1A237E; }

/* ── Feedback sheet — APK style ───────────────────────── */
.fb-intro-card {
  background: #fff;
  border-radius: 14px;
  padding: 14px 14px 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-bottom: 20px;
}
.fb-intro-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.fb-intro-emoji { font-size: 22px; }
.fb-intro-title {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: #212121;
}
.fb-hint {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: #424242;
}
.fb-hint-icon { font-size: 16px; flex-shrink: 0; }

.fb-field-label {
  display: block;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: #424242;
  margin-bottom: 8px;
}
.fb-input, .fb-textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 16px;
  background: #fff;
  border: 1px solid #E0E0E0;
  border-radius: 12px;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.fb-input:focus, .fb-textarea:focus {
  outline: none;
  border-color: #1B5E20;
  border-width: 2px;
  padding: 11px 13px;
}
.fb-textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.5;
}
.fb-counter {
  text-align: right;
  font-size: 12px;
  color: #9E9E9E;
  margin-top: 4px;
}
.fb-counter.fb-counter-ok { color: #4CAF50; }
.fb-anon-note {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 12px;
  color: #9E9E9E;
  margin: 6px 0 0;
}
.fb-submit {
  width: 100%;
  height: 54px;
  margin-top: 28px;
  background: #1B5E20;
  color: #fff;
  border: none;
  border-radius: 14px;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(27,94,32,0.25);
  transition: background 0.2s, transform 0.1s;
}
.fb-submit:active { transform: scale(0.98); }
.fb-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Success state */
.fb-success {
  text-align: center;
  padding: 40px 16px;
}
.fb-success-emoji {
  font-size: 64px;
  margin-bottom: 20px;
}
.fb-success-title {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: #1B5E20;
  margin-bottom: 12px;
}
.fb-success-msg {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 16px;
  color: #616161;
  line-height: 1.6;
  margin-bottom: 6px;
}
.fb-success-msg-en {
  font-size: 13px;
  color: #9E9E9E;
  margin-bottom: 32px;
}
.fb-success-again {
  background: transparent;
  color: #1B5E20;
  border: 1.5px solid #1B5E20;
  padding: 12px 24px;
  border-radius: 12px;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* ── Install sheet ────────────────────────────────────────── */
.install-benefits-card {
  background: #E8F5E9;
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 20px;
}
.install-benefit {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 14px;
  color: #1B5E20;
  font-weight: 600;
}
.install-benefit span:first-child { font-size: 18px; }
.install-sheet-note {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 14px;
  color: #424242;
  margin-bottom: 16px;
  line-height: 1.5;
}
.install-sheet-btn {
  width: 100%;
  height: 54px;
  background: #1B5E20;
  color: #fff;
  border: none;
  border-radius: 14px;
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 3px 8px rgba(27,94,32,0.3);
  margin-bottom: 16px;
}
.install-sheet-steps {
  padding-left: 20px;
  margin: 0 0 16px;
}
.install-sheet-steps li {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 14px;
  color: #424242;
  line-height: 1.6;
  padding: 6px 0;
}
.install-sheet-tip {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 12px;
  color: #FF8F00;
  background: #FFF8E1;
  border-radius: 8px;
  padding: 10px 12px;
  margin-top: 8px;
}
.install-sheet-done-icon {
  font-size: 56px;
  text-align: center;
  padding: 24px 0 12px;
}
.install-sheet-done-msg {
  font-family: "Noto Sans Tamil", sans-serif;
  font-size: 15px;
  color: #1B5E20;
  text-align: center;
  line-height: 1.6;
}