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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    gap: 20px;
}

.loader-overlay.hidden {
    display: none;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top: 5px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loader-overlay p {
    color: white;
    font-size: 1.1rem;
    font-weight: 500;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 15px;
}

.social-links {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 15px;
}

.social-link {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.95rem;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.contact-message {
    margin-top: 15px;
    font-size: 0.9rem;
    opacity: 0.85;
    font-style: italic;
}

main {
    padding: 40px;
}

.calendar-section {
    margin-bottom: 30px;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.calendar-header h2 {
    font-size: 1.5rem;
    color: #333;
}

.month-nav {
    background: #667eea;
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s;
}

.month-nav:hover {
    background: #764ba2;
    transform: scale(1.1);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
}

.calendar-day-header {
    text-align: center;
    font-weight: 600;
    padding: 10px 5px;
    color: #667eea;
    font-size: 0.9rem;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
    position: relative;
}

.calendar-day.other-month {
    color: #ccc;
    cursor: default;
}

.calendar-day.available {
    background: #f0f4ff;
    color: #333;
}

.calendar-day.available:hover {
    background: #667eea;
    color: white;
    transform: scale(1.05);
}

.calendar-day.selected {
    background: #667eea;
    color: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
}

.calendar-day.unavailable {
    background: #f5f5f5;
    color: #999;
    cursor: not-allowed;
}

.calendar-day.today {
    border: 2px solid #667eea;
}

.creneaux-section {
    margin: 30px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.creneaux-section h3 {
    color: #333;
    margin-bottom: 15px;
}

.creneaux-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
}

.creneau-btn {
    padding: 12px;
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
    text-align: center;
}

.creneau-btn:hover {
    border-color: #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
}

.creneau-btn.selected {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

#reservationForm {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid #e0e0e0;
}

#reservationForm h3 {
    margin-bottom: 20px;
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
    font-size: 0.95rem;
}

input,
select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s;
}

input:focus,
select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.recap {
    background: #f0f4ff;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    color: #333;
}

button[type="submit"] {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

button[type="submit"]:active {
    transform: translateY(0);
}

button[type="submit"]:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.loader {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

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

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

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    font-size: 0.9rem;
}

footer p {
    margin: 5px 0;
}

@media (max-width: 768px) {
    .container {
        border-radius: 0;
    }

    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 8px;
    }

    .calendar-grid {
        gap: 1px;
    }

    .calendar-day-header {
        font-size: 0.55rem;
        padding: 5px 0px;
    }

    .calendar-day {
        font-size: 0.8rem;
        border-radius: 4px;
    }

    .creneaux-list {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
}