:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --glow: 0 0 15px rgba(59, 130, 246, 0.5);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    position: relative;
}

.sidebar {
    width: 400px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.unit-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.unit-label {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.unit-label.active {
    color: var(--accent-blue);
}

.toggle-switch {
    width: 32px;
    height: 16px;
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
}

.toggle-switch.active {
    background-color: var(--accent-blue);
}

.toggle-knob {
    width: 12px;
    height: 12px;
    background-color: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.2s;
}

.toggle-switch.active .toggle-knob {
    transform: translateX(16px);
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.input-section label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

textarea {
    width: 100%;
    height: 120px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    resize: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: var(--glow);
}

button {
    background-color: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 14px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

button:hover {
    background-color: var(--accent-blue-hover);
}

button:active {
    transform: scale(0.98);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.stat-icon {
    font-size: 24px;
    background-color: rgba(255, 255, 255, 0.1);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
}

.itinerary-list-container {
    flex: 1;
}

.itinerary-list-container h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-secondary);
}

.parsed-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.parsed-list li {
    background-color: var(--bg-primary);
    border-radius: 8px;
    padding: 12px;
    font-size: 14px;
    border-left: 4px solid var(--accent-blue);
    display: flex;
    flex-direction: column;
    gap: 8px;
    box-shadow: var(--shadow);
}

.itinerary-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.itinerary-route {
    display: flex;
    flex-direction: column;
}

.itinerary-cities {
    font-weight: 500;
}

.itinerary-train {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.itinerary-times {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    font-size: 12px;
}

.time-label {
    font-size: 9px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.itinerary-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.detail-item {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 9px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.detail-value {
    font-size: 12px;
    font-weight: 600;
}

.parsed-list li.empty-state {
    border-left: none;
    text-align: center;
    color: var(--text-secondary);
    background-color: transparent;
    padding: 24px 0;
    box-shadow: none;
}

.map-container {
    flex: 1;
    position: relative;
}

#map {
    width: 100%;
    height: 100%;
    background-color: #0f172a;
}

/* Custom Leaflet Styles for Dark Mode */
.leaflet-control-zoom-in,
.leaflet-control-zoom-out,
.leaflet-control-attribution {
    filter: invert(100%) hue-rotate(180deg) brightness(95%) contrast(90%);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        overflow: hidden;
    }

    .app-container {
        flex-direction: column;
        height: 100vh;
        width: 100vw;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        width: 85%;
        height: 100%;
        transition: left 0.3s ease;
        z-index: 2000;
        border-right: none;
    }

    .sidebar.active {
        left: 0;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(4px);
        z-index: 1500;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        width: 40px;
        height: 40px;
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 8px;
        position: fixed;
        top: 16px;
        left: 16px;
        z-index: 3000;
        cursor: pointer;
        box-shadow: var(--shadow);
    }

    .menu-toggle span {
        display: block;
        width: 100%;
        height: 2px;
        background-color: var(--text-primary);
        transition: all 0.3s ease;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .map-container {
        height: 100vh;
        width: 100vw;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 1;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .stat-card {
        padding: 12px;
    }

    .stat-value {
        font-size: 16px;
    }

    .header-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

/* Hide menu toggle on desktop */
@media (min-width: 769px) {

    .menu-toggle,
    .sidebar-overlay {
        display: none;
    }
}