* {
    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;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow-x: hidden;
}

/* Effet d'arrière-plan animé */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(118, 75, 162, 0.2) 0%, transparent 50%);
    animation: backgroundPulse 15s ease-in-out infinite;
    z-index: 0;
    pointer-events: none;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 
        0 30px 90px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset,
        0 10px 40px rgba(118, 75, 162, 0.4);
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
    position: relative;
    z-index: 1;
}

/* Effet de brillance subtile */
.contact-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shine 3s infinite;
    z-index: 1;
    pointer-events: none;
}

@keyframes shine {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

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

.contact-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 50px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Effet de particules flottantes */
.contact-header::after {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px, 80px 80px;
    background-position: 0 0, 40px 40px;
    animation: particleFloat 20s linear infinite;
    z-index: 0;
}

.contact-header::after {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: 
        radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
        radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px, 80px 80px;
    background-position: 0 0, 40px 40px;
    animation: particleFloat 20s linear infinite;
    z-index: 0;
}

@keyframes particleFloat {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.logo-section {
    font-size: 4rem;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
    animation: logoFloat 3s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.site-logo {
    max-width: 120px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
    animation: logoFloat 3s ease-in-out infinite;
}

.site-subtitle {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.contact-header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
}

.contact-header p {
    font-size: 1.2rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    font-weight: 300;
}

.contact-content {
    padding: 50px;
    position: relative;
    z-index: 2;
    background: white;
}

@media (max-width: 768px) {
    .contact-content {
        padding: 30px 25px;
    }
}

.form-group {
    margin-bottom: 25px;
}

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

.label-icon {
    margin-right: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e8e8e8;
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: #fafafa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 
        0 0 0 4px rgba(102, 126, 234, 0.1),
        0 4px 12px rgba(102, 126, 234, 0.15);
    background: white;
    transform: translateY(-1px);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.char-counter {
    text-align: right;
    font-size: 0.85rem;
    color: #666;
    margin-top: 5px;
}

.checkbox-group {
    margin-top: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
    cursor: pointer;
}

.form-actions {
    margin-top: 30px;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 4px 15px rgba(102, 126, 234, 0.4),
        0 1px 3px rgba(0, 0, 0, 0.1);
}

.btn-submit::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: 0;
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 
        0 8px 30px rgba(102, 126, 234, 0.5),
        0 4px 10px rgba(0, 0, 0, 0.15);
}

.btn-submit:hover::before {
    width: 300px;
    height: 300px;
}

.btn-submit:active {
    transform: translateY(-1px);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-text,
.btn-loader {
    position: relative;
    z-index: 1;
}

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.form-message {
    margin-top: 20px;
    padding: 15px;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

.contact-info {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 2px solid #f0f0f0;
}

.contact-info h3 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 1.5rem;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.info-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 30px 25px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(102, 126, 234, 0.1);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.info-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 15px 40px rgba(102, 126, 234, 0.2),
        0 5px 15px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.15) 100%);
    border-color: rgba(102, 126, 234, 0.3);
}

.info-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: inline-block;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.info-card:hover .info-icon {
    transform: scale(1.2) rotate(5deg);
    animation: iconBounce 0.6s ease;
}

@keyframes iconBounce {
    0%, 100% { transform: scale(1.2) rotate(5deg); }
    50% { transform: scale(1.3) rotate(-5deg); }
}

.info-card h4 {
    color: #333;
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.info-card p {
    color: #666;
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
    .contact-header h1 {
        font-size: 2rem;
    }
    
    .contact-content {
        padding: 25px;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
}

/* Animation pour les champs invalides */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
    border-color: #dc3545;
    animation: shake 0.4s ease;
}