/* ============================================
   FORMS & MODALS
   ============================================ */

/* === MODAL LOAN FORM === */
.loan-form-modal, .auth-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loan-form-modal.show, .auth-modal.show {
    opacity: 1;
    visibility: visible;
}

.loan-form-container, .auth-container {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.auth-container {
    max-width: 450px;
    max-height: 70vh;
}

.loan-form-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--neutral-500);
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.loan-form-close:hover {
    background: var(--neutral-100);
    color: var(--neutral-800);
}

.loan-form-header {
    text-align: center;
    margin-bottom: 40px;
}

.loan-form-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.loan-form-header p {
    color: var(--neutral-600);
}

/* Form Progress */
.form-progress {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    gap: 16px;
}

.progress-step {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--neutral-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--neutral-500);
    transition: var(--transition);
    position: relative;
}

.progress-step.active {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.progress-step.completed {
    background: var(--success-color);
    color: var(--white);
}

.progress-step::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: 16px;
    height: 2px;
    background: var(--neutral-200);
    transform: translateY(-50%);
}

.progress-step:last-child::after { display: none; }
.progress-step.completed::after { background: var(--success-color); }

/* Form Steps */
.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeInUp 0.5s ease-out;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--neutral-300);
    border-radius: 12px;
    font-size: 16px;
    background: var(--white);
    transition: var(--transition);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin: 0;
}

.checkbox-item label {
    margin: 0;
    cursor: pointer;
    font-weight: 500;
}

.form-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    margin-bottom: 32px;
    border-radius: 12px;
    background: var(--neutral-100);
    padding: 4px;
}

.auth-tab {
    flex: 1;
    padding: 12px 24px;
    border: none;
    background: transparent;
    font-weight: 600;
    color: var(--neutral-600);
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.auth-tab.active {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeInUp 0.3s ease-out;
}

.auth-form h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

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

/* AOS Animations */
[data-aos] {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-aos].aos-animate { opacity: 1; }
[data-aos="fade-up"] { transform: translateY(40px); }
[data-aos="fade-up"].aos-animate { transform: translateY(0); }
[data-aos="fade-left"] { transform: translateX(40px); }
[data-aos="fade-left"].aos-animate { transform: translateX(0); }
[data-aos="fade-right"] { transform: translateX(-40px); }
[data-aos="fade-right"].aos-animate { transform: translateX(0); }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .nav-container { padding: 0 20px; }
    .hero-container { grid-template-columns: 1fr; gap: 60px; text-align: center; }
    /* Tablette: h1 = 2rem (32px) */
    .hero-title { font-size: 2rem; }
    .explanation-content, .vision-grid { grid-template-columns: 1fr; gap: 60px; }
    .offers-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        padding-top: 40px;
        transition: var(--transition);
        box-shadow: var(--shadow-xl);
        border-top: 1px solid var(--neutral-200);
    }
    
    .nav-menu.active { left: 0; }
    .nav-right { display: none; }
    .hamburger { display: flex; }
    
    /* Mobile: h1 = 1.75rem (28px) */
    .hero-title { font-size: 1.75rem; }
    .hero-illustration { width: 280px; height: 280px; font-size: 120px; }
    
    .offers-grid, .steps-container, .testimonials-grid { grid-template-columns: 1fr; }
    
    .footer-content { flex-direction: column; gap: 40px; text-align: center; }
    .footer-nav { flex-direction: column; gap: 20px; align-items: center; }
    
    /* Mobile: h2 = 1.5rem (24px) */
    .section-header h2 { font-size: 1.5rem; }
    
    .form-grid { grid-template-columns: 1fr; gap: 16px; }
    .results-grid { grid-template-columns: 1fr; }
    .results-actions { flex-direction: column; gap: 12px; }
    .results-actions button { width: 100%; justify-content: center; }
    
    .loan-form-container, .auth-container { padding: 24px; margin: 20px; }
    .loan-form-header h2 { font-size: 1.75rem; }
    .form-navigation { flex-direction: column; gap: 16px; }
    .btn-secondary, .btn-primary { width: 100%; }
}

@media (max-width: 480px) {
    .container { padding: 0 15px; }
    .nav-container { padding: 0 15px; height: 64px; }
    .hero { padding-top: 64px; }
    /* Petit mobile: h1 = 1.5rem (24px) */
    .hero-title { font-size: 1.5rem; }
    /* Petit mobile: h2 = 1.375rem (22px) */
    .section-header h2 { font-size: 1.375rem; }
    
    .simulator-form { flex-direction: column; gap: 16px; }
    .amount-input { max-width: 100%; }
    
    .hero-illustration { width: 240px; height: 240px; font-size: 100px; }
    .circle-illustration { width: 320px; height: 320px; font-size: 120px; }
    
    .step-number { width: 50px; height: 50px; font-size: 2rem; }
    .offer-icon { width: 80px; height: 80px; font-size: 32px; }
}