/* ==========================================================================
   style.css
   Railway Ticket Booking — design system + component styles.

   Palette: deep railway blue + signal amber, on a warm ticket-paper cream.
   The card and ticket components use a dashed "perforation" motif to evoke
   a real paper ticket stub, tying the visual language to the subject.
   ========================================================================== */

:root {
  /* Color */
  --color-rail-blue-900: #0B3D5C;
  --color-rail-blue-700: #114E73;
  --color-rail-blue-500: #1B6A94;
  --color-amber-600: #E8912D;
  --color-amber-500: #F2A93E;
  --color-paper: #FBF7EF;
  --color-paper-dim: #F1EADA;
  --color-ink: #1D2630;
  --color-ink-soft: #55606B;
  --color-line: #DDD3BE;
  --color-success: #2E7D4F;
  --color-danger: #C0392B;
  --color-white: #FFFFFF;

  /* Type */
  --font-display: "Zilla Slab", Georgia, "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Layout */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --shadow-card: 0 1px 2px rgba(11, 61, 92, 0.06), 0 6px 20px rgba(11, 61, 92, 0.08);
  --max-width: 1180px;
  --nav-height: 72px;
}

/* ---------------------------- Reset & base ------------------------------- */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-rail-blue-900);
  margin: 0 0 0.5em;
  line-height: 1.15;
  font-weight: 600;
}

p { margin: 0 0 1em; color: var(--color-ink-soft); }

a { color: var(--color-rail-blue-700); text-decoration: none; }

img { max-width: 100%; display: block; }

button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible {
  outline: 2px solid var(--color-amber-600);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* -------------------------------- Buttons -------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-amber-600);
  color: var(--color-rail-blue-900);
}
.btn-primary:hover { background: var(--color-amber-500); box-shadow: 0 4px 14px rgba(232, 145, 45, 0.35); }

.btn-secondary {
  background: var(--color-rail-blue-900);
  color: var(--color-white);
}
.btn-secondary:hover { background: var(--color-rail-blue-700); }

.btn-ghost {
  background: transparent;
  color: var(--color-rail-blue-900);
  border-color: var(--color-line);
}
.btn-ghost:hover { background: var(--color-paper-dim); }

.btn-danger {
  background: var(--color-danger);
  color: var(--color-white);
}
.btn-danger:hover { background: #a8321f; }

.btn-block { width: 100%; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* --------------------------------- Navbar --------------------------------- */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-height);
  background: var(--color-rail-blue-900);
  border-bottom: 3px solid var(--color-amber-600);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
}

.nav-brand-mark {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--color-amber-600);
  color: var(--color-rail-blue-900);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }

.nav-link {
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.nav-link:hover, .nav-link-active { color: var(--color-white); border-bottom-color: var(--color-amber-600); }

.nav-auth-area { display: flex; align-items: center; gap: 10px; }
.nav-auth-area .btn-ghost { color: var(--color-white); border-color: rgba(255,255,255,0.35); }
.nav-auth-area .btn-ghost:hover { background: rgba(255,255,255,0.1); }

.nav-username { color: var(--color-white); font-weight: 600; margin-right: 4px; }

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--color-white);
  border-radius: 2px;
}

/* ------------------------------- Hero section ----------------------------- */

.hero {
  background:
    linear-gradient(180deg, rgba(11,61,92,0.92), rgba(11,61,92,0.85)),
    repeating-linear-gradient(90deg, rgba(255,255,255,0.04) 0 2px, transparent 2px 40px);
  color: var(--color-white);
  padding: 64px 0 90px;
}

.hero-content { max-width: 640px; }

.hero h1 {
  color: var(--color-white);
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin-bottom: 0.4em;
}

.hero p.lead {
  color: rgba(255,255,255,0.82);
  font-size: 1.1rem;
  max-width: 520px;
}

/* ------------------------------ Search form ------------------------------- */

.search-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 28px;
  margin-top: 34px;
  position: relative;
}

.search-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px 16px;
}

.search-grid .field-passengers { grid-column: span 1; }
.search-grid .field-submit { grid-column: span 4; margin-top: 6px; }

.field { display: flex; flex-direction: column; gap: 6px; }

.field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.field input, .field select {
  padding: 11px 12px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--color-ink);
  background: var(--color-paper);
}

.field input:focus, .field select:focus {
  border-color: var(--color-rail-blue-500);
  outline: none;
}

.input-error { border-color: var(--color-danger) !important; }

.field-error {
  font-size: 0.8rem;
  color: var(--color-danger);
  min-height: 1.1em;
}

/* ------------------------------ Content sections --------------------------- */

.section { padding: 64px 0; }
.section-alt { background: var(--color-paper-dim); }
.section-heading { text-align: left; max-width: 620px; margin-bottom: 36px; }
.section-heading p { margin: 0; }

/* -------------------------------- Train cards ------------------------------ */

.results-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 26px;
  padding: 18px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.toolbar-group { display: flex; gap: 14px; flex-wrap: wrap; }

.train-list { display: flex; flex-direction: column; gap: 16px; }

.train-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 5px solid var(--color-rail-blue-700);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 1.4fr 1.6fr 0.9fr;
  gap: 20px;
  align-items: center;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.train-card:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); }

.train-identity h3 { margin-bottom: 2px; font-size: 1.15rem; }
.train-number { color: var(--color-ink-soft); font-size: 0.85rem; }

.train-route {
  display: flex;
  align-items: center;
  gap: 14px;
}

.route-point { text-align: center; }
.route-point .time { font-size: 1.2rem; font-weight: 700; color: var(--color-rail-blue-900); }
.route-point .place { font-size: 0.82rem; color: var(--color-ink-soft); }

.route-line {
  flex: 1;
  min-width: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.route-line .duration { font-size: 0.72rem; color: var(--color-ink-soft); }
.route-line .track { width: 100%; height: 2px; background: var(--color-line); position: relative; }
.route-line .track::after {
  content: "";
  position: absolute; right: -4px; top: -3px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-amber-600);
}

.train-classes { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.class-pill {
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--color-paper-dim);
  color: var(--color-rail-blue-900);
  border: 1px solid var(--color-line);
}

.train-action { text-align: right; display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.train-price { font-size: 1.3rem; font-weight: 700; color: var(--color-rail-blue-900); }
.train-price small { font-size: 0.75rem; color: var(--color-ink-soft); font-weight: 500; display: block; }
.train-seats { font-size: 0.8rem; color: var(--color-success); }
.train-seats.low { color: var(--color-danger); }

/* --------------------------------- Cards ---------------------------------- */

.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.grid-2 { display: grid; grid-template-columns: 1fr 380px; gap: 26px; align-items: start; }

/* ------------------------------ Seat map ----------------------------------- */

.coach-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 20px; flex-wrap: wrap; gap: 12px;
}

.seat-legend { display: flex; gap: 18px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--color-ink-soft); }
.legend-swatch { width: 16px; height: 16px; border-radius: 4px; }
.legend-swatch.available { background: var(--color-white); border: 2px solid var(--color-rail-blue-500); }
.legend-swatch.selected { background: var(--color-amber-600); }
.legend-swatch.occupied { background: #C9C2B2; }

.seat-map {
  background: var(--color-paper-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow-x: auto;
}

.seat-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  align-items: center;
}

.seat {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-rail-blue-500);
  background: var(--color-white);
  color: var(--color-rail-blue-900);
  font-weight: 600;
  font-size: 0.85rem;
  transition: background 0.15s ease, transform 0.1s ease;
}

.seat-available:hover { background: var(--color-paper-dim); transform: scale(1.05); }

.seat-selected {
  background: var(--color-amber-600);
  border-color: var(--color-amber-600);
  color: var(--color-rail-blue-900);
}

.seat-occupied {
  background: #C9C2B2;
  border-color: #C9C2B2;
  color: #8B8471;
  cursor: not-allowed;
}

.seat-aisle { width: 28px; flex-shrink: 0; }

.seat-summary-bar {
  margin-top: 20px;
  padding: 16px 18px;
  background: var(--color-white);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------- Passenger form -------------------------------- */

.passenger-block {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 18px;
}

.passenger-block h4 { display: flex; align-items: center; gap: 8px; }

.passenger-badge {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--color-rail-blue-900);
  color: var(--color-white);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
}

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 16px; margin-top: 14px; }
.form-grid .span-2 { grid-column: span 2; }

/* ------------------------------ Booking summary ----------------------------- */

.summary-box { position: sticky; top: calc(var(--nav-height) + 20px); }

.summary-row {
  display: flex; justify-content: space-between; gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: 0.92rem;
}
.summary-row:last-of-type { border-bottom: none; }
.summary-row .label { color: var(--color-ink-soft); }
.summary-row .value { font-weight: 600; text-align: right; }

.summary-total {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-top: 14px; padding-top: 14px; border-top: 2px solid var(--color-rail-blue-900);
}
.summary-total .amount { font-size: 1.6rem; font-weight: 700; color: var(--color-rail-blue-900); font-family: var(--font-display); }

/* -------------------------------- Payment ----------------------------------- */

.payment-methods { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 22px; }

.payment-method {
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px 10px;
  text-align: center;
  background: var(--color-white);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-ink-soft);
}
.payment-method.active { border-color: var(--color-amber-600); background: #FFF6E9; color: var(--color-rail-blue-900); }

.payment-icon { font-size: 1.6rem; display: block; margin-bottom: 6px; }

/* ---------------------------- Loading overlay -------------------------------- */

.loading-overlay {
  position: fixed; inset: 0;
  background: rgba(11, 61, 92, 0.94);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px;
  color: var(--color-white);
  z-index: 200;
}

.spinner {
  width: 52px; height: 52px;
  border-radius: 50%;
  border: 4px solid rgba(255,255,255,0.25);
  border-top-color: var(--color-amber-600);
  animation: spin 0.8s linear infinite;
}

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

/* ---------------------------- Confirmation ticket ---------------------------- */

.ticket {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  max-width: 720px;
  margin: 0 auto;
}

.ticket-header {
  background: var(--color-rail-blue-900);
  color: var(--color-white);
  padding: 22px 28px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px;
}

.ticket-status {
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-success);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.ticket-status.cancelled { background: var(--color-danger); }

.ticket-body { padding: 26px 28px; }

.ticket-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px 20px; margin-bottom: 20px; }
.ticket-field .label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-ink-soft); }
.ticket-field .value { font-weight: 600; color: var(--color-ink); margin-top: 2px; }

.ticket-divider {
  border-top: 2px dashed var(--color-line);
  margin: 20px 0;
  position: relative;
}
.ticket-divider::before, .ticket-divider::after {
  content: "";
  position: absolute; top: -10px;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--color-paper);
}
.ticket-divider::before { left: -38px; }
.ticket-divider::after { right: -38px; }

.ticket-passengers ul { list-style: none; padding: 0; margin: 0; }
.ticket-passengers li {
  display: flex; justify-content: space-between;
  padding: 8px 0; border-bottom: 1px solid var(--color-paper-dim);
  font-size: 0.92rem;
}

.ticket-actions { display: flex; gap: 12px; padding: 20px 28px; background: var(--color-paper-dim); flex-wrap: wrap; }

/* ------------------------------- My bookings --------------------------------- */

.booking-list { display: flex; flex-direction: column; gap: 16px; }

.booking-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
}

.booking-card-info { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.booking-card-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.status-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #E5F3EA; color: var(--color-success);
}
.status-badge.cancelled { background: #FBE7E4; color: var(--color-danger); }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-ink-soft);
}
.empty-state .icon { font-size: 2.6rem; margin-bottom: 12px; }

/* --------------------------------- Auth forms --------------------------------- */

.auth-wrapper { max-width: 440px; margin: 0 auto; }
.auth-wrapper .card { padding: 34px; }
.auth-switch { text-align: center; margin-top: 18px; font-size: 0.92rem; color: var(--color-ink-soft); }
.auth-disclaimer {
  background: #FFF6E9; border: 1px solid var(--color-amber-500);
  border-radius: var(--radius-sm); padding: 12px 14px;
  font-size: 0.82rem; color: var(--color-ink-soft); margin-bottom: 20px;
}

/* ---------------------------------- Contact ------------------------------------ */

.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 30px; }
.contact-info-item { display: flex; gap: 14px; margin-bottom: 22px; }
.contact-info-icon {
  width: 42px; height: 42px; flex-shrink: 0;
  border-radius: 50%; background: var(--color-rail-blue-900);
  color: var(--color-white); display: flex; align-items: center; justify-content: center;
}

/* ----------------------------------- Footer ------------------------------------ */

.footer {
  background: var(--color-rail-blue-900);
  color: rgba(255,255,255,0.75);
  padding: 40px 0 24px;
  margin-top: 60px;
}
.footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.footer-brand { color: var(--color-white); font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 6px; }
.footer-bottom { text-align: center; margin-top: 26px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.15); font-size: 0.82rem; }

/* ----------------------------------- Toasts ------------------------------------ */

.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 300;
}

.toast {
  min-width: 240px;
  max-width: 340px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  background: var(--color-rail-blue-900);
  color: var(--color-white);
  font-size: 0.9rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  transform: translateX(30px);
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.toast-visible { transform: translateX(0); opacity: 1; }
.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-info { background: var(--color-rail-blue-900); }

/* ----------------------------------- Modal ------------------------------------- */

.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(29, 38, 48, 0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 250;
  opacity: 0;
  transition: opacity 0.2s ease;
  padding: 20px;
}
.modal-visible { opacity: 1; }

.modal-box {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 26px;
  max-width: 400px;
  width: 100%;
  transform: translateY(10px);
  transition: transform 0.2s ease;
}
.modal-visible .modal-box { transform: translateY(0); }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* --------------------------------- Utility ------------------------------------- */

.text-center { text-align: center; }
.mt-lg { margin-top: 32px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .search-grid { grid-template-columns: repeat(2, 1fr); }
  .search-grid .field-submit { grid-column: span 2; }

  .train-card { grid-template-columns: 1fr; }
  .train-action { align-items: flex-start; text-align: left; }

  .grid-2 { grid-template-columns: 1fr; }
  .summary-box { position: static; margin-top: 20px; }

  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span-2 { grid-column: span 1; }

  .contact-grid { grid-template-columns: 1fr; }
  .payment-methods { grid-template-columns: repeat(2, 1fr); }

  .booking-card { grid-template-columns: 1fr; }
  .booking-card-info { grid-template-columns: repeat(2, 1fr); }

  .ticket-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--color-rail-blue-900);
    flex-direction: column;
    align-items: stretch;
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
    gap: 0;
  }
  .nav-menu-open { max-height: 420px; padding: 16px 24px 24px; }

  .nav-links { flex-direction: column; gap: 4px; }
  .nav-link { padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.1); }

  .nav-auth-area { flex-direction: column; align-items: stretch; margin-top: 14px; gap: 8px; }

  .search-grid { grid-template-columns: 1fr; }
  .search-grid .field-submit { grid-column: span 1; }

  .results-toolbar { flex-direction: column; align-items: stretch; }
  .toolbar-group { flex-direction: column; }

  .payment-methods { grid-template-columns: repeat(2, 1fr); }
  .ticket-grid { grid-template-columns: 1fr; }
  .ticket-actions { flex-direction: column; }
  .ticket-actions .btn { width: 100%; }
}

/* ----------------------------------- Print -------------------------------------- */

@media print {
  .navbar, .footer, .ticket-actions, .toast-container, #print-hide {
    display: none !important;
  }
  body { background: var(--color-white); }
  .ticket { box-shadow: none; border: 1px solid #ccc; }
  .section { padding: 0; }
}