:root {
    --primary-color: #374151;
    --primary-dark: #1f2937;
    --secondary-color: #6b7280;
    --accent-color: #4b5563;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-color: #111827;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f5f5f5;
    color: var(--text-color);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: var(--text-color);
    margin-bottom: 40px;
    padding: 40px 20px;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

header .tagline {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 400;
}

.search-section {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 32px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.search-section h2 {
    color: var(--text-color);
    font-size: 1.8rem;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 8px;
    font-size: 0.875rem;
}

.form-group label i {
    color: var(--text-light);
    margin-right: 6px;
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="datetime-local"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    background: white;
    color: var(--text-color);
    font-family: inherit;
}

.form-group input[type="datetime-local"] {
    cursor: pointer;
}

.form-group input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.6;
}

.form-group input[type="datetime-local"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(55, 65, 81, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 2px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 8px 8px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: var(--shadow);
}

.suggestions.active {
    display: block;
}

.suggestion-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.2s;
    border-bottom: 1px solid var(--border-color);
}

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

.suggestion-item:hover {
    background: var(--bg-color);
}

.suggestion-item strong {
    color: var(--text-color);
    display: block;
}

.suggestion-item small {
    color: var(--text-light);
}

.checkbox-group {
    display: flex;
    align-items: center;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    margin: 0;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
}

.transport-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 10px;
}

.transport-checkbox {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.transport-checkbox:hover {
    border-color: var(--primary-color);
    background: var(--bg-color);
}

.transport-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin-right: 8px;
    cursor: pointer;
}

.transport-checkbox input[type="checkbox"]:checked + span {
    color: var(--text-color);
    font-weight: 500;
}

.btn-primary {
    width: 100%;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease;
    margin-top: 10px;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-primary:active {
    transform: scale(0.98);
}

.loading {
    text-align: center;
    padding: 60px 20px;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.results {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.results h2 {
    color: var(--text-color);
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.results-list {
    display: grid;
    gap: 20px;
}

.destination-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    transition: all 0.2s ease;
}

.destination-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow);
}

.destination-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.destination-title {
    flex: 1;
}

.destination-title h3 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.destination-title .location {
    color: var(--text-light);
    font-size: 0.9rem;
}

.distance-badge {
    background: var(--bg-color);
    color: var(--text-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.destination-description {
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: 20px;
    padding: 15px;
    background: white;
    border-radius: 8px;
}

.destination-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.highlight-tag {
    background: var(--bg-color);
    color: var(--text-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 400;
    border: 1px solid var(--border-color);
}

.connection-info {
    background: white;
    border-radius: 8px;
    padding: 15px;
    margin-top: 15px;
}

.connection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.connection-header h4 {
    color: var(--text-color);
    font-size: 1rem;
}

.duration {
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.875rem;
}

.connection-details {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.transport-icon {
    background: var(--bg-color);
    padding: 8px 12px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

.transport-icon i {
    color: var(--primary-color);
}

.transfer-count {
    color: var(--text-light);
    font-size: 0.9rem;
}

.dt-badge {
    background: var(--text-color);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.connections-container {
    margin-top: 20px;
}

.connections-title {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-color);
}

.connection-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 12px;
    overflow: hidden;
}

.connection-card-collapsed .connection-details-full {
    display: none;
}

.connection-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.connection-summary:hover {
    background: var(--bg-color);
}

.connection-time {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.time-departure, .time-arrival {
    font-size: 1.125rem;
}

.time-arrow {
    color: var(--text-light);
    font-size: 1rem;
}

.connection-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: flex-end;
    margin-right: 12px;
}

.duration-badge, .transfers-badge {
    background: var(--bg-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8125rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.toggle-icon {
    color: var(--text-light);
    font-size: 0.875rem;
    transition: transform 0.3s;
}

.connection-details-full {
    padding: 16px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-color);
    display: none;
}

.connection-card:first-child .connection-details-full {
    display: block;
}

.connection-card:first-child .toggle-icon {
    transform: rotate(180deg);
}

.leg-item {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.leg-item:last-child {
    margin-bottom: 0;
}

.leg-timeline {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 6px;
}

.leg-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    border: 2px solid var(--text-color);
    flex-shrink: 0;
}

.leg-dot-start {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.leg-line {
    width: 2px;
    flex: 1;
    background: var(--border-color);
    min-height: 40px;
}

.leg-line-end {
    display: none;
}

.leg-content {
    flex: 1;
    padding-bottom: 8px;
}

.leg-header, .leg-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.leg-time {
    font-weight: 600;
    font-size: 0.9375rem;
    min-width: 45px;
}

.leg-station {
    font-weight: 500;
    flex: 1;
}

.leg-platform {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.leg-transport {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: white;
    border-radius: 4px;
    margin: 8px 0;
    font-size: 0.875rem;
}

.leg-walking {
    background: var(--bg-color);
    color: var(--text-light);
}

.leg-direction {
    color: var(--text-light);
    font-size: 0.8125rem;
    margin-left: 4px;
}

.estimate-notice {
    background: #fff3cd;
    border: 1px solid #ffc107;
    color: #856404;
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 0.875rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cache-notice {
    background: #e3f2fd;
    border: 1px solid #2196f3;
    color: #0d47a1;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 0.875rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .search-section,
    .results {
        padding: 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .transport-options {
        grid-template-columns: 1fr;
    }
    
    .destination-header {
        flex-direction: column;
        gap: 10px;
    }
}