/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #d32f2f;
    --primary-dark: #b71c1c;
    --secondary-color: #1976d2;
    --success-color: #388e3c;
    --warning-color: #f57c00;
    --danger-color: #d32f2f;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --bg-light: #fafafa;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text {
    color: white;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.btn-logout {
    background-color: white;
    color: var(--primary-color);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background-color: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

.content-section {
    display: none;
    min-height: 500px;
}

.content-section.active {
    display: block;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 3rem 0 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Auth Container */
.auth-container {
    display: flex;
    justify-content: center;
    padding: 2rem 0;
}

.auth-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
}

.auth-card h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    text-align: center;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* Buttons */
.btn-primary,
.btn-secondary {
    width: 100%;
    padding: 0.875rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #1565c0;
    transform: translateY(-1px);
}

.btn-book {
    padding: 0.5rem 1.5rem;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-book:hover {
    background-color: #2e7d32;
    transform: translateY(-1px);
}

.btn-cancel {
    padding: 0.5rem 1.5rem;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-cancel:hover {
    background-color: #c62828;
    transform: translateY(-1px);
}

/* Auth Switch */
.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Section Title */
.section-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
}

/* Search Card */
.search-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    max-width: 800px;
    margin: 0 auto 2rem;
}

/* Search Results */
.search-results {
    max-width: 1000px;
    margin: 0 auto;
}

.train-card {
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

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

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

.train-info h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.train-number {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.train-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.detail-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
}

.seats-available {
    color: var(--success-color);
    font-weight: 600;
}

/* Bookings List */
.bookings-list {
    max-width: 1000px;
    margin: 0 auto;
}

.booking-card {
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
}

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

.booking-info h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

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

.booking-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 1.5rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: var(--bg-white);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

/* Footer */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 2rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Alert Messages */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .nav-links {
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.4rem 0.6rem;
        font-size: 0.9rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .search-card {
        padding: 1.5rem;
    }

    .train-details {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .logo-text {
        display: none;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.25rem;
    }

    .hero h1 {
        font-size: 1.5rem;
    }
}