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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0F0F0F;
    color: #EAEAEA;
    line-height: 1.6;
}

/* ─── Navigation ─────────────────────────────────────────── */
nav {
    background-color: #1A1A1A;
    border-bottom: 1px solid #2A2A2A;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: #B0B0B0;
    text-decoration: none;
    padding: 0.5rem 1.5rem;
    border: 2px solid transparent;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-links a:hover {
    color: #EAEAEA;
    border-color: #2A2A2A;
    background-color: #1E1E1E;
}

.nav-links a.active {
    color: #EAEAEA;
    border-color: #4A90E2;
}

.nav-name {
    border: 2px solid #2A2A2A;
}

.ml-button {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid #2A2A2A;
    background-color: #1A1A1A;
    color: #EAEAEA;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.ml-button:hover {
    border-color: #4A90E2;
    background-color: #1E1E1E;
}

/* ─── Container ──────────────────────────────────────────── */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* ─── Section Présentation ───────────────────────────────── */
.presentation {
    background-color: #1A1A1A;
    border: 2px solid #2A2A2A;
    border-radius: 8px;
    padding: 3rem;
    margin-bottom: 4rem;
    text-align: center;
}

.presentation h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #EAEAEA;
    border-bottom: 2px solid #4A90E2;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.presentation p {
    color: #B0B0B0;
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ─── Section Projets ────────────────────────────────────── */
.projects-section {
    margin-top: 4rem;
}

.projects-section h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    color: #EAEAEA;
    border-bottom: 2px solid #4A90E2;
    display: inline-block;
    padding-bottom: 0.5rem;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

/* ─── Filtres ─────────────────────────────────────────────── */
.filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    padding: 0 1rem;
}

.filter-btn {
    padding: 0.75rem 2rem;
    background-color: transparent;
    border: 2px solid #2A2A2A;
    color: #B0B0B0;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background-color: #1E1E1E;
    border-color: #4A90E2;
    color: #EAEAEA;
}

.filter-btn.active {
    background-color: #4A90E2;
    border-color: #4A90E2;
    color: #FFFFFF;
}

/* ─── Grille de projets ──────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background-color: #1A1A1A;
    border: 2px solid #2A2A2A;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    animation: fadeIn 0.5s ease forwards;
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, #4A90E2, transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.project-card:hover {
    border-color: #4A90E2;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(74, 144, 226, 0.2);
}

.project-card:hover::before {
    transform: translateX(100%);
}

.card-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    background-color: #141414;
    border-bottom: 1px solid #2A2A2A;
    padding: 1.5rem;
}

.card-logo img {
    max-height: 90px;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.project-card:hover .card-logo img {
    transform: scale(1.08);
}

.card-body {
    padding: 1.25rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.card-body h3 {
    font-size: 1.2rem;
    color: #EAEAEA;
    font-weight: 600;
}

.card-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: #4A90E2;
    background-color: rgba(74, 144, 226, 0.1);
    border: 1px solid rgba(74, 144, 226, 0.3);
    border-radius: 4px;
    padding: 0.25rem 0.6rem;
    width: fit-content;
}

.project-card.hidden {
    display: none;
}

/* ─── Animation ──────────────────────────────────────────── */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .presentation h1 {
        font-size: 1.8rem;
    }

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

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-btn {
        width: 100%;
    }
}