:root {
    --primary-color: #00a8ff;
    --primary-hover-color: #007bff;
    --dark-bg-color: #0a0a0a;
    --light-bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --border-color: #00a8ff;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 168, 255, 0.1);
    --font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
}

body {
    background: var(--dark-bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.navbar {
    background: transparent !important;
    transition: background 0.3s ease;
    padding: 1rem 0;
}

.navbar-brand {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    letter-spacing: -1px;
}

.nav-link {
    color: var(--text-color) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
    transition: color 0.3s, background 0.3s;
}

.nav-link.active,
.nav-link:hover {
    background: var(--primary-color);
    color: #fff !important;
}

.card {
    background: var(--light-bg-color);
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 168, 255, 0.2);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover-color));
    color: #fff;
    font-size: 1.25rem;
    font-weight: 600;
    border-bottom: none;
    padding: 1.5rem;
}

.form-control,
.form-select {
    background: #2b2b2b;
    color: var(--text-color);
    border: 1px solid #444;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus,
.form-select:focus {
    background: #2b2b2b;
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 168, 255, 0.3);
}

.btn-primary {
    background: var(--primary-color);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: background-color 0.3s, transform 0.3s;
}

.btn-primary:hover {
    background: var(--primary-hover-color);
    transform: translateY(-2px);
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -2px;
    color: #fff;
    text-align: center;
    margin-bottom: 2rem;
}

.result-container {
    background: var(--light-bg-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-top: 2rem;
    box-shadow: var(--box-shadow);
}

#live-train-map {
    height: 400px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}