/* ==========================================================================
   fly2israel — Uptime Radar Dashboard
   Data Scientist Theme · Mobile-First · Dark/Light Auto
   ========================================================================== */

/* ── CSS Variables ── */
:root {
  /* Light mode (default) */
  --bg: #ffffff;
  --bg-subtle: #f6f8fa;
  --bg-card: #ffffff;
  --bg-card-hover: #f3f4f6;
  --bg-inset: #f6f8fa;
  --text: #1f2328;
  --text-secondary: #656d76;
  --text-tertiary: #8b949e;
  --border: #d0d7de;
  --border-light: #e8ecef;
  --accent: #0969da;
  --accent-bg: #ddf4ff;
  --accent-text: #ffffff;
  --green: #1a7f37;
  --green-bg: #dafbe1;
  --green-text: #ffffff;
  --red: #cf222e;
  --red-bg: #ffebe9;
  --red-text: #ffffff;
  --amber: #9a6700;
  --amber-bg: #fff8c5;
  --orange: #bd561d;
  --orange-bg: #fff1e5;
  --gray: #6e7681;
  --gray-bg: #f0f0f0;
  --shadow-sm: 0 1px 2px rgba(31,35,40,0.04), 0 1px 3px rgba(31,35,40,0.06);
  --shadow-md: 0 3px 8px rgba(31,35,40,0.08), 0 1px 3px rgba(31,35,40,0.04);
  --shadow-lg: 0 8px 24px rgba(31,35,40,0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --bg-subtle: #161b22;
    --bg-card: #161b22;
    --bg-card-hover: #1c2333;
    --bg-inset: #0d1117;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;
    --border: #30363d;
    --border-light: #21262d;
    --accent: #58a6ff;
    --accent-bg: #0d419d;
    --accent-text: #ffffff;
    --green: #3fb950;
    --green-bg: #0b2e1c;
    --green-text: #ffffff;
    --red: #f85149;
    --red-bg: #3d1214;
    --red-text: #ffffff;
    --amber: #d29922;
    --amber-bg: #271b04;
    --orange: #db6d28;
    --orange-bg: #2e1503;
    --gray: #6e7681;
    --gray-bg: #21262d;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2), 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 3px 8px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
  }
}

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

/* ── Base ── */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

::selection {
  background: var(--accent);
  color: var(--accent-text);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-subtle);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 24px;
  }
}

/* ── Loading ── */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  color: var(--text-secondary);
  gap: 16px;
}

.loading-spinner {
  font-size: 40px;
  animation: float 1.5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.loading p {
  font-size: 15px;
  font-weight: 500;
}

/* ── Header ── */
.header {
  padding: 24px 0 16px;
  border-bottom: 1px solid var(--border-light);
  margin-bottom: 20px;
}

.header-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header h1 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.header-icon {
  font-size: 26px;
}

.header-title {
  background: linear-gradient(135deg, var(--accent), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--accent-bg);
  color: var(--accent);
  border: 1px solid var(--border);
  line-height: 1.6;
}

.header .subtitle {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 6px;
  line-height: 1.5;
}

.header .updated {
  font-size: 12px;
  color: var(--text-tertiary);
  font-family: var(--mono);
  margin-top: 8px;
}

@media (min-width: 768px) {
  .header {
    padding: 32px 0 20px;
    margin-bottom: 28px;
  }
  .header h1 {
    font-size: 30px;
  }
  .header .subtitle {
    font-size: 15px;
  }
}

/* ── KPI Cards ── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  opacity: 0.8;
}

.kpi-card[data-kpi="total-airlines"]::before { background: var(--accent); }
.kpi-card[data-kpi="active-airlines"]::before { background: var(--green); }
.kpi-card[data-kpi="suspended-airlines"]::before { background: var(--red); }
.kpi-card[data-kpi="avg-reliability"]::before { background: var(--amber); }

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

.kpi-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 2px;
}

.kpi-value.green { color: var(--green); }
.kpi-value.red { color: var(--red); }
.kpi-value.amber { color: var(--amber); }
.kpi-value.accent { color: var(--accent); }

.kpi-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-sub {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 1px;
}

@media (min-width: 600px) {
  .kpi-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }
  .kpi-card {
    padding: 20px;
  }
  .kpi-value {
    font-size: 32px;
  }
}

/* ── Action Bar ── */
.action-bar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-tertiary);
  pointer-events: none;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px 10px 36px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.filter-select {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 5l3 3 3-3' stroke='%238b949e' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.filter-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-icon {
  font-size: 16px;
  line-height: 1;
}

@media (min-width: 600px) {
  .action-bar {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }
  .search-wrapper {
    flex: 1;
    min-width: 200px;
  }
  .btn .btn-text {
    display: inline;
  }
}

@media (max-width: 599px) {
  .btn {
    width: 100%;
    padding: 12px 18px;
  }
  .btn .btn-text {
    display: inline;
  }
}

/* ── Recommendation Banner ── */
.recommendation {
  margin-bottom: 16px;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.recommendation-inner {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--accent-bg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 16px;
  position: relative;
}

.recommendation-icon {
  font-size: 28px;
  flex-shrink: 0;
  line-height: 1;
}

.recommendation-body {
  flex: 1;
  min-width: 0;
}

.recommendation-heading {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 4px;
}

.recommendation-airline {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.recommendation-detail {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.recommendation-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  border-radius: 4px;
  transition: color var(--transition);
}

.recommendation-close:hover {
  color: var(--text);
}

/* ── Stats Bar ── */
.stats-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 14px;
  padding: 0 2px;
}

.stats-bar-count {
  font-weight: 600;
  color: var(--text);
}

.stats-bar-sep {
  color: var(--text-tertiary);
}

.stats-bar-text {
  color: var(--text-tertiary);
}

/* ── Airline Cards Grid ── */
.airline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 32px;
}

@media (min-width: 720px) {
  .airline-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

/* ── Airline Card ── */
.airline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.airline-card:hover {
  border-color: var(--text-tertiary);
  box-shadow: var(--shadow-md);
}

.airline-card:active {
  transform: scale(0.995);
}

.airline-card.expanded {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

/* Card Header */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 0;
  gap: 8px;
}

.card-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
}

.airline-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.airline-iata {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  flex-shrink: 0;
  padding: 1px 6px;
  background: var(--bg-subtle);
  border-radius: 4px;
  border: 1px solid var(--border-light);
}

.card-status {
  flex-shrink: 0;
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}

.status-badge.active {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid color-mix(in srgb, var(--green) 20%, transparent);
}

.status-badge.suspended {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid color-mix(in srgb, var(--red) 20%, transparent);
}

.status-badge.partial {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid color-mix(in srgb, var(--amber) 20%, transparent);
}

.status-badge.unknown {
  background: var(--gray-bg);
  color: var(--gray);
  border: 1px solid var(--border);
}

/* Uptime Bar */
.uptime-section {
  padding: 10px 16px 6px;
}

.uptime-bar {
  height: 10px;
  background: var(--bg-inset);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.uptime-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.uptime-fill.excellent { background: var(--green); }
.uptime-fill.good { background: var(--amber); }
.uptime-fill.average { background: var(--orange); }
.uptime-fill.unreliable { background: var(--red); }

.uptime-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}

.uptime-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.uptime-since {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: var(--mono);
}

/* Card Meta Row */
.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 16px 12px;
  flex-wrap: wrap;
}

.reliability-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
}

.reliability-badge.excellent { color: var(--green); }
.reliability-badge.good { color: var(--amber); }
.reliability-badge.average { color: var(--orange); }
.reliability-badge.unreliable { color: var(--red); }

.route-count-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
}

.route-count-label strong {
  font-weight: 700;
  color: var(--text);
}

.card-expand-icon {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-tertiary);
  transition: transform var(--transition);
}

.airline-card.expanded .card-expand-icon {
  transform: rotate(180deg);
}

/* ── Expanded Section ── */
.card-expanded {
  border-top: 1px solid var(--border-light);
  background: var(--bg-subtle);
  overflow: hidden;
  animation: expandIn 0.25s ease-out;
}

@keyframes expandIn {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 2000px;
  }
}

.card-expanded-inner {
  padding: 16px;
}

/* Timeline / Heatmap */
.timeline-section {
  margin-bottom: 16px;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.timeline-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.timeline-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 10px;
  color: var(--text-tertiary);
}

.timeline-legend-item {
  display: flex;
  align-items: center;
  gap: 3px;
}

.timeline-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(14px, 1fr));
  gap: 2px;
}

.timeline-month {
  aspect-ratio: 1;
  border-radius: 3px;
  position: relative;
  cursor: help;
  transition: transform var(--transition), opacity var(--transition);
}

.timeline-month:hover {
  transform: scale(1.4);
  z-index: 2;
  opacity: 0.9;
}

.timeline-month.excellent { background: var(--green); }
.timeline-month.good { background: var(--amber); }
.timeline-month.average { background: var(--orange); }
.timeline-month.unreliable { background: var(--red); }

.timeline-tooltip {
  display: none;
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
  font-family: var(--mono);
}

.timeline-month:hover .timeline-tooltip {
  display: block;
}

/* Year dividers in timeline */
.timeline-year-label {
  font-size: 9px;
  color: var(--text-tertiary);
  font-family: var(--mono);
  padding-top: 4px;
  text-align: center;
}

/* Route Detail List */
.route-detail-section h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.route-detail-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.route-detail-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.route-detail-item:hover {
  border-color: var(--border);
}

.route-dest {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.route-code {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.route-arrow {
  color: var(--text-tertiary);
  font-size: 11px;
}

.route-city {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.route-status {
  flex-shrink: 0;
}

.route-status .status-badge {
  font-size: 10px;
  padding: 2px 8px;
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  grid-column: 1 / -1;
}

.empty-state-icon {
  font-size: 40px;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* ── Footer ── */
.footer {
  text-align: center;
  padding: 32px 0 40px;
  color: var(--text-tertiary);
  font-size: 13px;
  line-height: 1.6;
  border-top: 1px solid var(--border-light);
  margin-top: 8px;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.footer a:hover {
  text-decoration: underline;
}

/* ── Screen reader only ── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Smooth hidden attribute ── */
[hidden] {
  display: none !important;
}