:root {
    --primary: #0077B6;
    --primary-light: #0096C7;
    --primary-dark: #023E8A;
    --secondary: #90E0EF;
    --accent: #FFB703;
    --dark: #1D3557;
    --light: #F8FBFF;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --text: #2B2D42;
    --text-light: #6c757d;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --radius: 12px;
    --container: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--light);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* Utilities */
.text-center { text-align: center; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }
.mb-40 { margin-bottom: 40px; }
.mt-40 { margin-top: 40px; }
.bg-light { background: var(--gray-100); padding: 80px 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .section-header h2 { font-size: 1.75rem; }
    section { padding: 60px 0; }
    .hero-home { padding: 80px 0; }
}

/* Header */
header {
    background: var(--white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 1.5rem;
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: var(--shadow-md);
        transform: translateY(-10px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
}

/* Hero Home & Common Hero */
.hero-home {
    position: relative;
    background-size: cover;
    background-position: center;
    color: var(--white);
    padding: 120px 0;
    text-align: center;
    background-color: var(--dark);
}

.hero-home::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(29, 53, 87, 0.9) 0%, rgba(0, 0, 0, 0.7) 100%);
    z-index: 1;
}

.hero-home .container {
    position: relative;
    z-index: 2;
}

.hero-home h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: 24px;
    line-height: 1.2;
    text-shadow: 0 4px 10px rgba(0,0,0,0.3);
}

.hero-home p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

/* Search Box */
.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 20px 30px;
    border-radius: 100px;
    border: none;
    font-size: 1.1rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    outline: none;
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-radius: 15px;
    margin-top: 10px;
    box-shadow: var(--shadow-lg);
    z-index: 10;
    display: none;
    text-align: left;
    max-height: 350px;
    overflow-y: auto;
}

.search-item {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--text);
}

.search-item:hover {
    background: var(--gray-100);
    color: var(--primary);
}

/* Cards */
.card {
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.section-header {
    max-width: 800px;
    margin: 0 auto 50px;
    text-align: center;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--dark);
}

/* List grids */
.list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
}

.list-item {
    background: var(--white);
    padding: 15px 20px;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    font-weight: 600;
    display: block;
}

.list-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--light);
}

/* Link Grid (Maillage) */
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
}

.link-item {
    padding: 12px 18px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.link-item:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: var(--dark); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(255, 183, 3, 0.4); }
.btn-secondary { background: rgba(255,255,255,0.1); color: var(--white); border: 2px solid var(--white); }
.btn-secondary:hover { background: var(--white); color: var(--primary); }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.9rem; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-family: inherit;
    outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 119, 182, 0.1); }

/* FAQ */
.faq-item {
    margin-bottom: 12px;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    background: var(--white);
}
.faq-question {
    padding: 20px;
    cursor: pointer;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--dark);
}
.faq-answer {
    padding: 0 20px 20px;
    color: var(--text-light);
    display: none;
    font-size: 0.95rem;
    border-top: 1px solid var(--gray-100);
    padding-top: 15px;
}
.faq-item.active .faq-answer { display: block; }
.faq-item.active .faq-question { color: var(--primary); }

/* Table */
.tech-table-wrapper { overflow-x: auto; }
table { min-width: 500px; }

/* Footer */
footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 50px;
}

@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 576px) {
    .footer-grid { grid-template-columns: 1fr; }
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}

/* Animations */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Breadcrumb */
.breadcrumb a:hover { color: var(--accent); opacity: 1; }