/* Le contenu du fichier style.css reste le même */
:root {
    --primary: #0f172a;
    --primary-dark: #1e293b;
    --primary-light: #e2e8f0;
    --accent: rgb(32 71 244);
    --accent-light: rgba(32, 71, 244, 0.1);
    --accent-hover: rgb(25, 57, 195);
    --text: #334155;
    --bg: #f8fafc;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}

.container {
    width: 100%;
    max-width: 800px;
    background: var(--white);
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.form-header {
    background: var(--accent);
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.form-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent);
    z-index: 1;
}

.form-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
    color: var(--white);
    position: relative;
    z-index: 2;
}

.form-header p {
    margin: 1rem 0 0;
    color: var(--white);
    font-size: 1.1rem;
    position: relative;
    z-index: 2;
    opacity: 0.9;
}

.form-content {
    padding: 2.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-200);
    border-radius: 0.75rem;
    font-size: 1rem;
    color: var(--text);
    background: var(--white);
    transition: all 0.2s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.radio-group,
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.radio-option,
.checkbox-option {
    position: relative;
}

.radio-option input[type="radio"],
.checkbox-option input[type="checkbox"] {
    position: absolute;
    opacity: 0;
}

.radio-option label,
.checkbox-option label {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.75rem 1.5rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-option label:hover,
.checkbox-option label:hover {
    border-color: var(--accent);
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.radio-option input[type="radio"]:checked + label,
.checkbox-option input[type="checkbox"]:checked + label {
    background: var(--white);
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light), var(--shadow);
}

.radio-option .icon,
.checkbox-option .icon {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
    color: var(--text);
}

.radio-option input[type="radio"]:checked + label .icon,
.checkbox-option input[type="checkbox"]:checked + label .icon {
    color: var(--accent);
    transform: scale(1.1);
}

.radio-option span,
.checkbox-option span {
    font-weight: 500;
    text-align: center;
}

.progress-bar {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: relative;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 2rem;
    right: 2rem;
    height: 2px;
    background: var(--gray-200);
    transform: translateY(-50%);
    z-index: 1;
}

.progress-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.step-number {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--white);
    border: 2px solid var(--gray-300);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--gray-300);
    transition: all 0.3s ease;
}

.progress-step.active .step-number {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
    box-shadow: 0 0 0 4px var(--accent-light);
}

.progress-step.completed .step-number {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--white);
}

.step-label {
    font-size: 0.875rem;
    color: var(--text);
    font-weight: 500;
}

.progress-step.active .step-label {
    color: var(--accent);
}

.step {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

.step.active {
    display: block;
}

.step h2 {
    font-size: 1.5rem;
    margin: 0 0 2rem;
    color: var(--primary);
    font-weight: 600;
}

.info-box {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--accent);
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    border-radius: 1rem;
    color: var(--white);
    box-shadow: var(--shadow);
}

.info-box p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.5;
}

.buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    gap: 1rem;
}

button {
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 140px;
    justify-content: center;
}

button.prev {
    background: var(--gray-100);
    color: var(--text);
}

button.prev:hover {
    background: var(--gray-200);
    transform: translateY(-1px);
}

button.next {
    background: var(--accent);
    color: var(--white);
    box-shadow: var(--shadow-sm);
}

button.next:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.volume-section {
    margin-top: 2rem;
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--gray-200);
}

.volume-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.volume-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.error {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

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

@media (max-width: 640px) {
    body {
        padding: 1rem;
    }
    
    .form-content {
        padding: 1.5rem;
    }
    
    .radio-group,
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    .form-header h1 {
        font-size: 1.75rem;
    }
    
    .buttons {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
    
    .progress-bar {
        padding: 1rem;
    }
    
    .step-label {
        display: none;
    }
    
    .volume-inputs {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}