/* =========================================================
   Cruise Price Tracker — Stylesheet
   Dark navy / gold palette; mobile-responsive
   ========================================================= */

/* --- Custom properties --- */
:root {
  --navy: #0d1b2a;
  --navy-mid: #1a2e45;
  --navy-light: #243d57;
  --gold: #c8a951;
  --gold-light: #e8c96d;
  --cream: #f5f0e8;
  --white: #ffffff;
  --text-primary: #e8e4dc;
  --text-secondary: #9aafbf;
  --text-muted: #6a859a;
  --green: #2ecc71;
  --red: #e74c3c;
  --green-bg: rgba(46, 204, 113, 0.12);
  --red-bg: rgba(231, 76, 60, 0.12);
  --border: rgba(200, 169, 81, 0.2);
  --border-subtle: rgba(255, 255, 255, 0.07);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--navy);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-light); text-decoration: underline; }

/* --- Layout --- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Header --- */
.site-header {
  background: var(--navy-mid);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.site-logo svg { width: 32px; height: 32px; }

.header-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: right;
}

.header-meta strong { color: var(--text-secondary); }

/* --- Navigation tabs --- */
.nav-tabs {
  display: flex;
  gap: 0;
  background: var(--navy-mid);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-tabs::-webkit-scrollbar { display: none; }

.nav-tab {
  padding: 0.875rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.nav-tab:hover { color: var(--text-primary); }

.nav-tab.active {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* --- Tab panels --- */
.tab-panel { display: none; padding: 2rem 0; }
.tab-panel.active { display: block; }

/* --- Dashboard cards --- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.stat-card:hover {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.stat-card-link {
  cursor: pointer;
  user-select: none;
}

.stat-card-link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.stat-card-link:active {
  transform: translateY(0);
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* --- Section headings --- */
.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- Recent changes panel --- */
.changes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 0.75rem;
}

.change-card {
  background: var(--navy-mid);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.change-card.price-down { border-left: 3px solid var(--green); }
.change-card.price-up   { border-left: 3px solid var(--red); }

.change-delta {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}

.change-card.price-down .change-delta { color: var(--green); background: var(--green-bg); }
.change-card.price-up   .change-delta { color: var(--red);   background: var(--red-bg); }

.change-info { flex: 1; min-width: 0; }
.change-name { font-size: 0.9rem; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.change-meta { font-size: 0.75rem; color: var(--text-muted); }

/* --- Filter bar --- */
.filter-bar {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  align-items: end;
}

.filter-group { display: flex; flex-direction: column; gap: 0.35rem; }

.filter-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.filter-control {
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.875rem;
  padding: 0.5rem 0.75rem;
  width: 100%;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.filter-control:focus {
  outline: none;
  border-color: var(--gold);
}

.filter-control option { background: var(--navy-mid); }

.filter-reset-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
  align-self: end;
}

.filter-reset-btn:hover { color: var(--text-primary); border-color: var(--text-muted); }

/* --- Price table --- */
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.price-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.price-table thead tr {
  background: var(--navy-light);
  border-bottom: 2px solid var(--border);
}

.price-table th {
  padding: 0.875rem 1rem;
  text-align: left;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  transition: color var(--transition);
}

.price-table th:hover { color: var(--gold); }

.price-table th.sorted-asc::after  { content: ' ↑'; color: var(--gold); }
.price-table th.sorted-desc::after { content: ' ↓'; color: var(--gold); }

.price-table tbody tr {
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background var(--transition);
}

.price-table tbody tr:hover { background: var(--navy-light); }
.price-table tbody tr:last-child { border-bottom: none; }

.price-table tbody tr.selected { background: rgba(200, 169, 81, 0.08); }

.price-table td {
  padding: 0.875rem 1rem;
  vertical-align: middle;
}

.badge-line {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-explora  { background: rgba(200, 169, 81, 0.15); color: var(--gold); }
.badge-oceania  { background: rgba(60, 130, 200, 0.15); color: #64a8d8; }

.price-col { white-space: nowrap; }

.price-cell { font-weight: 700; color: var(--gold); font-family: var(--font-mono); }
.price-cell.price-down { color: var(--green); }
.price-cell.price-up   { color: var(--red); }

/* Original (pre-discount) price shown as struck-through */
.orig-price {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  text-decoration: line-through;
  margin-left: 0.4rem;
}

/* Percentage discount badge */
.discount-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  background: rgba(74, 222, 128, 0.15);
  color: var(--green);
  margin-left: 0.3rem;
  vertical-align: middle;
}

.price-delta {
  font-size: 0.7rem;
  font-weight: 600;
  margin-left: 0.35rem;
}

.delta-down { color: var(--green); }
.delta-up   { color: var(--red); }

.avail-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.avail-available { background: var(--green-bg); color: var(--green); }
.avail-waitlist  { background: rgba(241, 196, 15, 0.15); color: #f1c40f; }
.avail-sold_out  { background: var(--red-bg); color: var(--red); }
.avail-unknown   { background: rgba(255,255,255,0.06); color: var(--text-muted); }

.no-results {
  padding: 3rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.result-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* --- Chart panel --- */
.chart-panel {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.chart-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.chart-voyage-name {
  font-size: 1.05rem;
  font-weight: 600;
}

.chart-voyage-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.chart-placeholder {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.chart-canvas-wrap { position: relative; height: 300px; }

/* --- Comparison view --- */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .comparison-grid { grid-template-columns: 1fr; }
}

.comparison-column {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-header {
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.comparison-header.explora { background: rgba(200, 169, 81, 0.12); color: var(--gold); }
.comparison-header.oceania  { background: rgba(60, 130, 200, 0.12); color: #64a8d8; }

.comparison-voyage {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.comparison-voyage-name {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.comparison-voyage-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.comparison-price {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold);
  font-family: var(--font-mono);
}

/* --- Loading / error states --- */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem;
  gap: 0.75rem;
  color: var(--text-muted);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.error-banner {
  background: var(--red-bg);
  border: 1px solid var(--red);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  color: var(--red);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

/* --- Status badge --- */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-ok   { background: var(--green-bg); color: var(--green); }
.status-warn { background: rgba(241, 196, 15, 0.15); color: #f1c40f; }
.status-err  { background: var(--red-bg); color: var(--red); }

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* --- Responsive breakpoints --- */
@media (max-width: 900px) {
  .filter-bar { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

@media (max-width: 640px) {
  .container { padding: 0 1rem; }
  .nav-tab { padding: 0.75rem 1rem; font-size: 0.82rem; }
  .stat-value { font-size: 1.6rem; }
  .dashboard-grid { grid-template-columns: 1fr 1fr; }
  .filter-bar { grid-template-columns: 1fr 1fr; }
  .tab-panel { padding: 1.25rem 0; }

  /* Stack certain table columns on mobile */
  .price-table th:nth-child(4),
  .price-table td:nth-child(4) { display: none; }  /* region */
}

@media (max-width: 400px) {
  .dashboard-grid { grid-template-columns: 1fr; }
  .filter-bar { grid-template-columns: 1fr; }
}

/* =========================================================
   Alerts panel
   ========================================================= */

.alerts-container {
  max-width: 680px;
  margin: 0 auto;
  padding: 1rem 0 3rem;
}

.alerts-hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

.alerts-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold);
  margin: 0 0 0.75rem;
}

.alerts-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.alert-form {
  background: var(--navy-mid);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 2rem;
}

.alert-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem 1.5rem;
  margin-bottom: 1.75rem;
}

.alert-form-grid .filter-group:first-child {
  grid-column: 1 / -1; /* email spans full width */
}

.required {
  color: var(--gold);
}

.alert-form-footer {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.alert-submit-btn {
  background: var(--gold);
  color: var(--navy);
  border: none;
  border-radius: 6px;
  padding: 0.65rem 1.75rem;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.alert-submit-btn:hover  { opacity: 0.85; }
.alert-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.alert-fine-print {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
}

.alert-feedback {
  margin-top: 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
}

.alert-success {
  background: rgba(74, 222, 128, 0.12);
  color: var(--green);
  border: 1px solid rgba(74, 222, 128, 0.3);
}

.alert-error {
  background: rgba(248, 113, 113, 0.12);
  color: var(--red);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

@media (max-width: 540px) {
  .alert-form-grid { grid-template-columns: 1fr; }
  .alert-form-grid .filter-group:first-child { grid-column: 1; }
}