:root {
    --primary-color: #FF6B6B;
    --primary-dark: #ee5253;
    --secondary-color: #4ECDC4;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #2d3436;
    --text-light: #636e72;
    --error-color: #ff7675;
    --success-color: #00b894;
    --border-radius: 12px;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px 16px;
}

form {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-color);
}

label.required::after {
    content: '*';
    color: var(--primary-color);
    margin-left: 4px;
}

select, 
input[type="number"], 
input[type="text"], 
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e1e1;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--surface-color);
    transition: var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

select:focus,
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255,107,107,0.1);
}

/* Style personnalisé pour l'input file */
.file-input-container {
    position: relative;
    width: 100%;
    min-height: 120px;
    border: 2px dashed #e1e1e1;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.file-input-container:hover {
    border-color: var(--primary-color);
    background-color: rgba(255,107,107,0.05);
}

.file-input-container input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.file-input-content {
    text-align: center;
    padding: 20px;
}

.file-input-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.file-input-text {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Preview des images */
.preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 12px;
    padding: 16px;
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    margin-top: 12px;
}

.preview-item {
    position: relative;
    margin: 10px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.preview-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
    transition: transform 0.2s ease;
}

.preview-item:hover img {
    transform: scale(1.05);
}

.delete-photo {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255,0,0,0.8);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.2s ease;
}

.delete-photo:hover {
    background: rgba(255,0,0,1);
    transform: scale(1.1);
}

.file-info {
    margin-top: 8px;
    font-size: 12px;
    color: #666;
    text-align: center;
}

/* Bouton d'envoi */
button[type="submit"] {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: var(--border-radius);
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

button[type="submit"]:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

button[type="submit"]:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Loader */
.loader {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

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

/* Message de retour */
#message {
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
}

#message.error {
    background-color: #fee;
    color: #d00;
    border: 1px solid #fcc;
}

#message.success {
    background-color: #efe;
    color: #0a0;
    border: 1px solid #cfc;
}

#message.warning {
    background-color: #fff3e0;
    color: #f90;
    border: 1px solid #ffe0b2;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-group {
    animation: fadeIn 0.3s ease-out forwards;
    animation-delay: calc(var(--animation-order) * 0.1s);
}

/* Responsive Design */
@media (max-width: 480px) {
    .container {
        padding: 16px 12px;
    }

    form {
        padding: 20px 16px;
        border-radius: var(--border-radius);
        margin-bottom: 20px;
    }

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

    select, 
    input[type="number"], 
    input[type="text"], 
    textarea {
        padding: 10px 14px;
        font-size: 16px; /* Évite le zoom sur iOS */
    }

    .preview-container {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: 8px;
        padding: 12px;
    }

    button[type="submit"] {
        padding: 14px;
    }
}

/* Styles spécifiques pour iOS */
@supports (-webkit-touch-callout: none) {
    select,
    input[type="number"],
    input[type="text"],
    textarea {
        font-size: 16px;
    }
}

/* Animation de pulsation pour le bouton d'envoi */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

button[type="submit"]:not(:disabled):hover {
    animation: pulse 1.5s infinite;
}

.hidden {
    display: none !important;
}