/* ── RouteCost — Styles ─────────────────────────────────────────────── */
/* Mobile-first · Dark theme · Glassmorphism                           */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── Tokens ────────────────────────────────────────────────────────── */

:root {
  --bg-base: #0b0f1a;
  --bg-surface: rgba(17, 24, 42, 0.85);
  --bg-glass: rgba(22, 30, 52, 0.6);
  --bg-glass-hover: rgba(30, 40, 68, 0.75);
  --border-glass: rgba(100, 140, 255, 0.12);
  --border-glass-hover: rgba(100, 180, 255, 0.25);

  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --accent-green: #22c55e;
  --accent-green-glow: rgba(34, 197, 94, 0.3);
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;

  --text-primary: #e8ecf4;
  --text-secondary: #8b97b0;
  --text-muted: #5a6478;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.08);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

/* ── Reset ─────────────────────────────────────────────────────────── */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
}

/* Ambient background gradient */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(59, 130, 246, 0.06), transparent),
    radial-gradient(ellipse 50% 50% at 80% 80%, rgba(34, 197, 94, 0.04), transparent);
  pointer-events: none;
  z-index: 0;
}

/* ── Layout ────────────────────────────────────────────────────────── */

.app {
  position: relative;
  z-index: 1;
  max-width: 480px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 100vh;
}

/* ── Header ────────────────────────────────────────────────────────── */

.header {
  text-align: center;
  padding: 20px 0 8px;
}

.header__logo {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header__tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 400;
}

/* ── Glass Panel ───────────────────────────────────────────────────── */

.panel {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-base);
}

.panel:hover {
  border-color: var(--border-glass-hover);
}

.panel__title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* ── Form Controls ─────────────────────────────────────────────────── */

.form-group {
  margin-bottom: 14px;
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

input[type='number'],
select {
  width: 100%;
  padding: 10px 14px;
  background: rgba(10, 15, 28, 0.7);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

input[type='number']:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

select {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b97b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11.5l-5-5h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ── Toggle (trip type) ────────────────────────────────────────────── */

.toggle-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-glass);
}

.toggle-group__btn {
  padding: 10px;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(10, 15, 28, 0.5);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.toggle-group__btn:hover {
  color: var(--text-primary);
  background: rgba(20, 28, 50, 0.7);
}

.toggle-group__btn.active {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ── Calculate Button ──────────────────────────────────────────────── */

.btn-calc {
  width: 100%;
  padding: 14px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #2563eb);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px var(--accent-glow);
  position: relative;
  overflow: hidden;
}

.btn-calc:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

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

.btn-calc:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Button shimmer animation */
.btn-calc::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: none;
}

.btn-calc:hover::after {
  animation: shimmer 0.6s ease forwards;
}

@keyframes shimmer {
  to {
    left: 100%;
  }
}

/* ── Map ───────────────────────────────────────────────────────────── */

.map-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
}

#map {
  height: 280px;
  width: 100%;
  background: var(--bg-base);
}

/* ── Results List ──────────────────────────────────────────────────── */

.results {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: center;
  transition: all var(--transition-base);
  cursor: pointer;
  animation: fadeSlideIn var(--transition-slow) both;
}

.result-card:hover {
  border-color: var(--border-glass-hover);
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.result-card.best {
  border-color: rgba(34, 197, 94, 0.3);
  box-shadow: 0 0 20px var(--accent-green-glow);
}

.result-card.best .result-card__rank {
  background: var(--accent-green);
  box-shadow: 0 0 12px var(--accent-green-glow);
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-card:nth-child(1) { animation-delay: 0s; }
.result-card:nth-child(2) { animation-delay: 0.04s; }
.result-card:nth-child(3) { animation-delay: 0.08s; }
.result-card:nth-child(4) { animation-delay: 0.12s; }
.result-card:nth-child(5) { animation-delay: 0.16s; }
.result-card:nth-child(6) { animation-delay: 0.2s; }
.result-card:nth-child(7) { animation-delay: 0.24s; }
.result-card:nth-child(8) { animation-delay: 0.28s; }
.result-card:nth-child(9) { animation-delay: 0.32s; }
.result-card:nth-child(10) { animation-delay: 0.36s; }

.result-card__rank {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.result-card__info {
  min-width: 0;
}

.result-card__name {
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.result-card__meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 2px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.result-card__meta span {
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.result-card__cost {
  text-align: right;
  flex-shrink: 0;
}

.result-card__cost-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-green);
}

.result-card__cost-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Savings badge ─────────────────────────────────────────────────── */

.result-card__saving {
  font-size: 0.7rem;
  color: var(--accent-amber);
  font-weight: 500;
  margin-top: 2px;
}

/* ── Loading State ─────────────────────────────────────────────────── */

.loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.loading__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(59, 130, 246, 0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 14px;
}

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

/* ── Status bar ────────────────────────────────────────────────────── */

.status {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 4px 0;
}

.status.error {
  color: var(--accent-red);
}

.status.success {
  color: var(--accent-green);
}

/* ── Empty state ───────────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  padding: 32px 20px;
  color: var(--text-muted);
}

.empty-state__icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
  opacity: 0.4;
}

.empty-state__text {
  font-size: 0.85rem;
}

/* ── Footer ────────────────────────────────────────────────────────── */

.footer {
  text-align: center;
  padding: 16px 0 24px;
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--accent);
}

/* ── Leaflet popup override ────────────────────────────────────────── */

.leaflet-popup-content-wrapper {
  background: var(--bg-surface) !important;
  color: var(--text-primary) !important;
  border-radius: var(--radius-sm) !important;
  box-shadow: var(--shadow-card) !important;
  border: 1px solid var(--border-glass) !important;
}

.leaflet-popup-tip {
  background: var(--bg-surface) !important;
}

.leaflet-popup-content {
  font-family: var(--font) !important;
  font-size: 0.8rem !important;
  line-height: 1.5 !important;
  margin: 10px 14px !important;
}

.popup-name {
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 4px;
}

.popup-detail {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.popup-cost {
  color: var(--accent-green);
  font-weight: 700;
  font-size: 1rem;
  margin-top: 6px;
}

/* ── Dark tiles adjustment ─────────────────────────────────────────── */

.leaflet-tile-pane {
  filter: brightness(0.7) contrast(1.1) saturate(0.8);
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (min-width: 640px) {
  .app {
    max-width: 560px;
    padding: 24px;
  }

  #map {
    height: 360px;
  }

  .header__logo {
    font-size: 2rem;
  }
}

@media (min-width: 1024px) {
  .app {
    max-width: 600px;
  }

  #map {
    height: 420px;
  }
}

/* ── Hidden utility ────────────────────────────────────────────────── */

.hidden {
  display: none !important;
}