:root {
  --bg-dark: #090d16;
  --bg-card: #111827;
  --bg-card-hover: #1f293d;
  --border-color: #1e293b;
  --accent-cyan: #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --font-sans: 'Plus Jakarta Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
}

/* Nav */
.top-nav {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-live {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.35);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  letter-spacing: 0.05em;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-switcher {
  display: flex;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-btn.active, .lang-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-link-home {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.2s;
}

.nav-link-home:hover {
  color: var(--accent-cyan);
}

/* Container */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.hero-section {
  text-align: center;
  margin-bottom: 2rem;
}

.hero-badge {
  display: inline-block;
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 9999px;
  margin-bottom: 0.85rem;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.hero-desc {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Calc Card */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  margin-bottom: 2.5rem;
}

.form-grid {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.form-group {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-group select, .form-group input {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
}

.form-group select:focus, .form-group input:focus {
  border-color: var(--accent-cyan);
}

.swap-icon-container {
  display: flex;
  align-items: center;
  padding-top: 1.25rem;
}

.btn-swap {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  color: var(--accent-cyan);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-swap:hover {
  transform: rotate(180deg);
  border-color: var(--accent-cyan);
}

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

.quick-chips {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.chip-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
}

/* Results Section */
.results-section {
  margin-bottom: 2.5rem;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.results-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.pulse-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--accent-emerald);
  font-weight: 600;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
}

/* Route Cards */
.routes-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.route-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.2s;
  flex-wrap: wrap;
  gap: 1rem;
}

.route-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.route-card.highlight-cheapest {
  border-color: var(--accent-emerald);
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.08) 0%, rgba(17, 24, 39, 1) 100%);
}

.bridge-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 220px;
}

.bridge-icon {
  font-size: 1.75rem;
}

.bridge-name {
  font-size: 1.1rem;
  font-weight: 700;
}

.badge-tag {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-top: 0.2rem;
}

.badge-cheapest {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-fastest {
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.4);
}

.metrics-group {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.metric-col {
  display: flex;
  flex-direction: column;
}

.metric-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
}

.btn-bridge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #3b82f6 100%);
  color: #000;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  transition: all 0.2s;
}

.btn-bridge:hover {
  opacity: 0.95;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.35);
}

/* Info Cards */
.info-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
}

.info-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.info-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .form-grid { flex-direction: column; align-items: stretch; }
  .swap-icon-container { padding-top: 0; justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .route-card { flex-direction: column; align-items: stretch; }
  .metrics-group { justify-content: space-between; }
  .btn-bridge { justify-content: center; width: 100%; }
}