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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

nav {
    background: #2e7d32;
    color: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.user-greeting {
    background: rgba(255,255,255,0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.logout-btn {
    background: rgba(255,255,255,0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 5px;
}

main {
    flex: 1;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

h1, h2 {
    margin-bottom: 1rem;
    color: #333;
}

.messages {
    margin-bottom: 2rem;
}

.message {
    padding: 0.75rem 1rem;
    border-radius: 5px;
    margin-bottom: 0.5rem;
}

.message.success {
    background: #c8e6c9;
    color: #2e7d32;
    border: 1px solid #a5d6a7;
}

.message.error {
    background: #ffcdd2;
    color: #c62828;
    border: 1px solid #ef9a9a;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #ddd;
    color: #333;
    text-decoration: none;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-primary {
    background: #2e7d32;
    color: white;
}

.btn-primary:hover {
    background: #1b5e20;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.hero {
    text-align: center;
    padding: 3rem;
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border-radius: 15px;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #555;
    margin-bottom: 1.5rem;
}

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

.feature {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.courts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.court-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.court-card h3 {
    margin-bottom: 0.5rem;
    color: #2e7d32;
}

.court-card p {
    margin: 0.5rem 0;
    color: #666;
}

.booking-form {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    max-width: 500px;
    margin-bottom: 2rem;
}

.date-selector {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #ddd;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

.form-group small {
    display: block;
    color: #666;
    font-size: 0.8rem;
    margin-top: 0.25rem;
}

.bookings-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.booking-card {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.booking-card.tentative {
    border-left: 4px solid #ff9800;
}

.booking-card h3 {
    margin: 0 0 0.5rem 0;
}

.booking-card p {
    margin: 0.25rem 0;
    color: #666;
}

.booking-actions {
    display: flex;
    gap: 0.5rem;
}

.past .booking-card {
    opacity: 0.7;
}

.auth-container {
    max-width: 400px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-container p {
    text-align: center;
    margin-top: 1rem;
}

.info {
    background: #e3f2fd;
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.info ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background: #333;
    color: white;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .booking-card {
        flex-direction: column;
        text-align: center;
    }
    
    .booking-actions {
        margin-top: 0.5rem;
    }
}