:root {
    --primary-bg: #000000;
    --card-bg: #1c1c1e;
    --text-primary: #ffffff;
    --text-secondary: #8e8e93;
    --accent: #007AFF;
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    --border: #38383a;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
}

.header::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--success));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Status Bar */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.75rem 1.25rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Alerts */
.alerts-section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 2rem;
    overflow: hidden;
}

.alerts-header {
    background: linear-gradient(135deg, var(--warning), #FF6B00);
    padding: 0.75rem 1.25rem;
    color: white;
    font-weight: 600;
}

.alert-item {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
}

.alert-item:last-child {
    border-bottom: none;
}

.alert-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.alert-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Connections */
.direction-section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.direction-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.direction-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.connection-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    transition: background-color 0.2s;
}

.connection-item:last-child {
    border-bottom: none;
}

.connection-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.route-badge {
    background: var(--accent);
    color: white;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    min-width: 2.5rem;
    text-align: center;
    margin-right: 1rem;
}

.route-badge.tram { background: var(--success); }
.route-badge.bus { background: var(--warning); }

.connection-info {
    flex: 1;
}

.destination {
    font-weight: 500;
    margin-bottom: 0.1rem;
}

.meta-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.time-info {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.departure-time {
    font-size: 1.2rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.departure-time.delayed { color: var(--warning); }

.delay-badge {
    font-size: 0.75rem;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 0.2rem;
}

.delay-badge.on-time { background: rgba(52, 199, 89, 0.2); color: var(--success); }
.delay-badge.delayed { background: rgba(255, 149, 0, 0.2); color: var(--warning); }
.delay-badge.no-realtime { background: rgba(142, 142, 147, 0.2); color: var(--text-secondary); }

.original-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: line-through;
    opacity: 0.7;
}

/* Loading & Error */
.loading, .error, .empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.error { color: var(--danger); }
.retry-btn {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    margin-top: 1rem;
    cursor: pointer;
}

/* Responsive */
@media (max-width: 600px) {
    .container { padding: 1rem; }
    .title { font-size: 1.5rem; }
    .connection-item { padding: 0.75rem 1rem; }
    .departure-time { font-size: 1.1rem; }
}

/* Reliability Stats */
.reliability-summary {
    display: flex;
    justify-content: space-around;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.reliability-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 700;
}

.stat-value.on-time { color: var(--success); }
.stat-value.delayed { color: var(--warning); }

.connection-reliability {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.3rem;
    background: rgba(255, 255, 255, 0.03);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    width: fit-content;
}

.reliability-icon {
    font-size: 0.9rem;
}