/* Variables CSS - Thème Noir et Blanc */
:root {
    --primary-color: #000000;
    --accent-color: #000000;
    --text-dark: #000000;
    --text-medium: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-white: #ffffff;
    --bg-light: #fafafa;
    --bg-dark: #f5f5f5;
    --border-color: #e0e0e0;
    --border-light: #f0f0f0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
    max-width: 100vw;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
    overflow-x: hidden;
    max-width: 100vw;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    box-sizing: border-box;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--text-dark);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 100;
    transition: var(--transition);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    z-index: 1001;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition-fast);
}

.logo a:hover {
    opacity: 0.7;
}

.logo img {
    width: 190px;
    height: 190px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.site-name {
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: -0.01em;
}

.nav-center {
    display: flex;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    margin: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-medium);
    font-weight: 400;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition-fast);
    letter-spacing: -0.005em;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-dark);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--text-dark);
    border-radius: 50%;
}

/* Hamburger Menu */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
    border-radius: 1px;
}

.hamburger-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: none;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
    display: block;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
    padding: var(--spacing-3xl) var(--spacing-lg);
    overflow-y: auto;
    display: none;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu ul {
    list-style: none;
}

.mobile-menu li {
    margin-bottom: var(--spacing-lg);
}

.mobile-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 400;
    display: block;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu a:hover,
.mobile-menu a.active {
    color: var(--text-medium);
}

/* Contact Section */
.contact-section {
    padding: calc(180px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: var(--bg-white);
    min-height: 100vh;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    box-sizing: border-box;
}

.contact-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-header h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.contact-header p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-3xl);
    align-items: start;
    max-width: 1000px;
    margin: 0 auto;
}

/* Contact Form */
.contact-form-container {
    background: var(--bg-white);
}

.contact-form {
    width: 100%;
}

.form-section {
    margin-bottom: var(--spacing-xl);
}

.form-section h3 {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.required {
    color: var(--text-dark);
    font-weight: 600;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
    margin-bottom: 0;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md) 0 var(--spacing-sm);
    border: none;
    border-bottom: 1px solid var(--border-color);
    background: transparent;
    font-size: 1rem;
    color: var(--text-dark);
    transition: var(--transition-fast);
    font-family: var(--font-primary);
    font-weight: 400;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-bottom-color: var(--text-dark);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
    opacity: 1;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
    padding-top: var(--spacing-md);
}

/* Checkbox styling */
.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    line-height: 1.5;
    color: var(--text-medium);
    font-size: 0.9rem;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    position: relative;
    width: 16px;
    height: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-white);
    margin-top: 2px;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.checkbox-label:hover .checkmark {
    border-color: var(--text-medium);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--text-dark);
    border-color: var(--text-dark);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 4px;
    height: 8px;
    border: solid var(--bg-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Button */
.btn-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--text-dark);
    color: var(--bg-white);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    font-family: var(--font-primary);
    letter-spacing: 0.01em;
    min-height: 48px;
}

.btn-submit:hover:not(:disabled) {
    background: var(--text-medium);
    transform: translateY(-1px);
}

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

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

/* Contact Info */
.contact-info {
    background: var(--bg-light);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    position: sticky;
    top: 100px;
}

.info-section {
    margin-bottom: var(--spacing-xl);
}

.info-section:last-child {
    margin-bottom: 0;
}

.info-section h3 {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.5;
}

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

.info-item i {
    color: var(--text-medium);
    width: 18px;
    text-align: center;
    margin-top: 2px;
    font-size: 0.9rem;
}

.info-section p {
    color: var(--text-dark);
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--bg-white);
    color: var(--text-medium);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    text-decoration: none;
    font-size: 0.9rem;
}

.social-links a:hover {
    background: var(--text-dark);
    color: var(--bg-white);
    border-color: var(--text-dark);
    transform: translateY(-2px);
}

/* Notification */
.notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    z-index: 1000;
    transform: translateX(100%);
    opacity: 0;
    transition: var(--transition);
    max-width: 400px;
    min-width: 300px;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.success {
    border-left: 3px solid var(--text-dark);
}

.notification.error {
    border-left: 3px solid var(--text-dark);
}

.notification-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.notification i {
    font-size: 1.1rem;
    margin-top: 2px;
    color: var(--text-dark);
}

.notification span {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--text-dark);
}

/* Footer */
footer {
    background: var(--bg-light);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-xl) 0;
}

.footer-bottom {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-bottom p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 400;
}

/* Responsive Design */

/* Large Tablets */
@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr 350px;
        gap: var(--spacing-2xl);
    }
    
    .contact-info {
        position: static;
    }
}

/* Tablets */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
        --spacing-3xl: 3.5rem;
    }

    nav {
        padding: var(--spacing-sm) var(--spacing-lg);
    }

    .hamburger-btn {
        display: flex;
    }

    .nav-center {
        display: none;
    }

    .mobile-menu {
        display: block;
    }

    .contact-section {
        padding: calc(170px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .contact-info {
        order: -1;
        padding: var(--spacing-lg);
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-section {
        margin-bottom: var(--spacing-lg);
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .notification {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
        min-width: auto;
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.25rem;
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }

    .contact-section {
        padding: calc(170px + var(--spacing-2xl)) 0 var(--spacing-xl);
    }

    .contact-header {
        margin-bottom: var(--spacing-2xl);
    }

    .contact-content {
        gap: var(--spacing-xl);
    }

    .contact-info {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .info-section {
        margin-bottom: var(--spacing-lg);
    }

    .form-section {
        margin-bottom: var(--spacing-lg);
    }

    .social-links a {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }

    .site-name {
        font-size: 1.3rem;
    }

    .logo img {
        width: 150px;
        height: 150px;
    }

    .mobile-menu {
        width: 250px;
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .notification {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .btn-submit {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
}

/* Small Mobile */
@media (max-width: 360px) {
    .contact-section {
        padding: calc(170px + var(--spacing-xl)) 0 var(--spacing-lg);
    }

    .contact-info {
        padding: var(--spacing-sm);
    }

    .form-group input,
    .form-group textarea {
        padding: var(--spacing-sm) 0 var(--spacing-xs);
        font-size: 0.95rem;
    }

    .mobile-menu {
        width: 220px;
    }

    .container {
        padding: 0 var(--spacing-xs);
    }
}

/* Landscape Mobile */
@media (max-height: 600px) and (orientation: landscape) {
    .contact-section {
        padding: calc(170px + var(--spacing-lg)) 0 var(--spacing-lg);
    }

    .contact-header {
        margin-bottom: var(--spacing-lg);
    }

    .contact-header h1 {
        font-size: clamp(2rem, 5vw, 2.5rem);
    }
}

/* Animations et interactions */
@media (prefers-reduced-motion: no-preference) {
    .form-group input,
    .form-group textarea {
        transition: border-color 0.2s ease, transform 0.1s ease;
    }

    .form-group input:focus,
    .form-group textarea:focus {
        transform: translateY(-1px);
    }

    .social-links a,
    .info-item {
        transition: transform 0.2s ease;
    }

    .info-item:hover {
        transform: translateX(2px);
    }

    .checkbox-label {
        transition: transform 0.1s ease;
    }

    .checkbox-label:active {
        transform: scale(0.98);
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Focus states pour l'accessibilité */
.btn-submit:focus-visible,
.form-group input:focus-visible,
.form-group textarea:focus-visible,
.social-links a:focus-visible,
.nav-menu a:focus-visible {
    outline: 2px solid var(--text-dark);
    outline-offset: 2px;
}

/* États de hover améliorés */
.nav-menu a:hover {
    opacity: 0.7;
}

.checkbox-label:hover {
    color: var(--text-dark);
}

.info-item:hover {
    color: var(--text-dark);
}

.info-item:hover i {
    color: var(--text-dark);
}