/* Reset et base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 25%, #4facfe 75%, #00f2fe 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    padding: 30px 0;
    text-align: center;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.logo-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.logo h1 {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    margin: 0;
}

.stage-subtitle {
    color: rgba(255,255,255,0.9);
    font-size: 1.2rem;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
    margin: 0;
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
    padding: 20px 0 40px;
}

/* Section d'information */
.info-section {
    width: 100%;
}

.stage-info {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.stage-info h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
    text-align: center;
}

.welcome-text {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 30px;
    text-align: center;
    line-height: 1.7;
}

/* Grille d'informations */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 25px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e3f2fd 100%);
    border-radius: 20px;
    border-left: 5px solid #4facfe;
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.1);
    transition: all 0.3s ease;
}

.info-item .icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.info-content strong {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.info-content p {
    color: #666;
    margin: 0;
}

.info-content small {
    color: #888;
    font-size: 0.9rem;
}

/* Informations pratiques */
.practical-info {
    background: #e8f4fd;
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
}

.practical-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 15px;
}

.practical-item:last-child {
    margin-bottom: 0;
}

.practical-item .icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.practical-item p {
    margin: 0;
    color: #444;
}

/* Call to action */
.call-to-action {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #4facfe 100%);
    color: white;
    padding: 25px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(30, 60, 114, 0.3);
}

.call-to-action p {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Section formulaire */
.form-container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.form-container h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    text-align: center;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* Form styles */
.inscription-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input {
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

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

.form-group input:valid {
    border-color: #28a745;
}

/* Submit button */
.submit-btn {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #4facfe 100%);
    color: white;
    border: none;
    padding: 20px 35px;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 15px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 8px 25px rgba(30, 60, 114, 0.3);
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(30, 60, 114, 0.4);
    background: linear-gradient(135deg, #2a5298 0%, #4facfe 50%, #00f2fe 100%);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Loading spinner */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Messages */
.success-message, .error-message {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
}

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

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

.success-message h3, .error-message h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px 0;
    color: white;
    opacity: 0.8;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .header {
        padding: 20px 0;
    }
    
    .logo {
        gap: 12px;
    }
    
    .logo-img {
        width: 70px;
        height: 70px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
        line-height: 1.2;
        text-align: center;
    }
    
    .stage-subtitle {
        font-size: 1rem;
    }
    
    .stage-info, .form-container {
        padding: 25px 20px;
        margin: 15px 0;
        border-radius: 15px;
    }
    
    .stage-info h2 {
        font-size: 1.4rem;
        margin-bottom: 15px;
    }
    
    .form-container h2 {
        font-size: 1.6rem;
    }
    
    .welcome-text {
        font-size: 1rem;
        margin-bottom: 25px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .info-item {
        padding: 20px 15px;
        border-radius: 15px;
    }
    
    .info-item .icon {
        font-size: 1.8rem;
    }
    
    .practical-info {
        padding: 20px 15px;
        border-radius: 12px;
    }
    
    .call-to-action {
        padding: 20px 15px;
        border-radius: 15px;
    }
    
    .call-to-action p {
        font-size: 1rem;
    }
    
    .form-group input {
        padding: 15px 12px;
        font-size: 16px; /* Évite le zoom sur iOS */
    }
    
    .submit-btn {
        padding: 18px 30px;
        font-size: 1.1rem;
        border-radius: 12px;
    }
    
    .main-content {
        gap: 15px;
        padding: 10px 0 25px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 8px;
    }
    
    .header {
        padding: 15px 0;
    }
    
    .logo {
        gap: 10px;
    }
    
    .logo-img {
        width: 60px;
        height: 60px;
    }
    
    .logo h1 {
        font-size: 1.4rem;
        line-height: 1.2;
        text-align: center;
        padding: 0 10px;
    }
    
    .stage-subtitle {
        font-size: 0.9rem;
    }
    
    .stage-info, .form-container {
        padding: 20px 15px;
        margin: 10px 0;
        border-radius: 12px;
    }
    
    .stage-info h2 {
        font-size: 1.2rem;
        line-height: 1.3;
    }
    
    .form-container h2 {
        font-size: 1.4rem;
    }
    
    .subtitle, .welcome-text {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .info-grid {
        gap: 12px;
    }
    
    .info-item {
        padding: 15px 12px;
        border-radius: 12px;
        gap: 12px;
    }
    
    .info-item .icon {
        font-size: 1.5rem;
    }
    
    .info-content strong {
        font-size: 1rem;
    }
    
    .practical-info {
        padding: 15px 12px;
    }
    
    .practical-item {
        gap: 10px;
        margin-bottom: 12px;
    }
    
    .call-to-action {
        padding: 18px 12px;
    }
    
    .form-group {
        margin-bottom: 18px;
    }
    
    .form-group input {
        padding: 16px 14px;
        font-size: 16px; /* Évite le zoom sur iOS */
        border-radius: 10px;
    }
    
    .submit-btn {
        padding: 16px 25px;
        font-size: 1.05rem;
        border-radius: 10px;
        margin-top: 10px;
    }
    
    .main-content {
        gap: 12px;
        padding: 8px 0 20px;
    }
    
    .footer {
        padding: 15px 0;
        font-size: 0.9rem;
    }
}

/* Animation pour l'apparition */
.stage-info, .form-container {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Styles pour les champs requis */
.form-group input:required:invalid {
    border-color: #e1e5e9;
}

.form-group input:required:valid {
    border-color: #28a745;
}

/* Hover effects pour desktop */
@media (hover: hover) {
    .form-group input:hover {
        border-color: #667eea;
    }
    
    .info-item:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        transition: all 0.3s ease;
    }
}