* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
    scroll-behavior: smooth;
}

:root {
    --primary-color: #2C3E50;
    --secondary-color: #E74C3C;
    --accent-color: #3498DB;
    --light-bg: #ECF0F1;
    --dark-text: #2C3E50;
    --light-text: #ECF0F1;
    --gray-text: #7F8C8D;
    --transition: all 0.3s ease;
}

body {
    background-color: var(--light-bg);
    color: var(--dark-text);
    font-weight: 300;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.highlight {
    color: var(--secondary-color);
    font-weight: 400;
}

/* HEADER */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--primary-color);
    box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.1);
    padding: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--light-text);
    margin: 0;
}

nav ul {
    display: flex;
    list-style: none;
    margin: 0;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--light-text);
    font-weight: 400;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
    padding-bottom: 0.25rem;
}

nav ul li a:hover {
    color: var(--secondary-color);
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Boutons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    border-radius: 3px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-text);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--primary-color);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-color);
    color: var(--light-text);
}

/* PROJECT HEADER */
.project-hero {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 8rem 2rem 4rem 2rem;
    text-align: center;
}

.project-hero-content {
    max-width: 1200px;
    margin: 0 auto;
}

.project-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.project-subtitle {
    font-size: 1.4rem;
    font-weight: 300;
    color: var(--light-bg);
    margin-bottom: 2rem;
}

.project-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.meta-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.meta-label {
    font-size: 0.9rem;
    color: var(--gray-text);
    margin-bottom: 0.25rem;
}

.meta-value {
    font-size: 1.1rem;
    font-weight: 500;
}

.project-tags {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tag {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 400;
}

/* PROJECT CONTENT */
.project-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.content-section {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary-color);
}

.project-image {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.feature-list {
    list-style: none;
    margin-top: 1rem;
}

.feature-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.stat-card {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray-text);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--secondary-color);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* FOOTER */
footer {
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 2rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--light-text);
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--secondary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .project-title {
        font-size: 2rem;
    }

    .project-subtitle {
        font-size: 1.1rem;
    }

    .project-meta {
        gap: 1rem;
    }

    .two-columns {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .footer-container {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    nav {
        display: none;
    }
}