* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
 
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0f1729 100%);
    color: #fff;
    overflow-x: hidden;
}
 
/* Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.5;
}
 
.bg-animation::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(100, 200, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: moveGrid 20s linear infinite;
}
 
@keyframes moveGrid {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}
 
/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(100, 200, 255, 0.1);
    transition: all 0.3s;
}
 
.logo {
    font-size: 24px;
    font-weight: bold;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
 
.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}
 
.nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s;
    position: relative;
}
 
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    transition: width 0.3s;
}
 
.nav-links a:hover::after {
    width: 100%;
}
 
/* Container principal */
.main-container {
    position: relative;
    z-index: 1;
    padding: 120px 50px 80px;
    max-width: 1400px;
    margin: 0 auto;
}
 
/* Header */
.page-header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 0.8s ease-out;
}
 
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}
 
.page-title {
    font-size: 56px;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
 
.page-subtitle {
    font-size: 20px;
    color: #a0a0b0;
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
}
 
/* Section Tableau de synthèse — compacte */
.intro-section {
    background: linear-gradient(135deg, rgba(100, 200, 255, 0.08) 0%, rgba(0, 255, 136, 0.04) 100%);
    border: 1px solid rgba(100, 200, 255, 0.25);
    border-radius: 20px;
    padding: 28px 36px;
    margin-bottom: 60px;
    backdrop-filter: blur(10px);
    position: relative;
    animation: fadeInUp 0.8s ease-out;
}
 
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
 
.intro-badge {
    position: absolute;
    top: -13px;
    left: 36px;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    color: #0a0e27;
    padding: 5px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
}
 
.intro-content {
    /* hauteur libre, s'adapte au contenu */
}
 
/* Bloc téléchargement */
.download-block {
    display: flex;
    align-items: center;
    gap: 18px;
    background: rgba(100, 200, 255, 0.06);
    border: 1px solid rgba(100, 200, 255, 0.2);
    border-radius: 14px;
    padding: 18px 24px;
    max-width: 680px;
    width: 100%;
    margin: 0 auto;
}
 
.download-icon {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0a0e27;
}
 
.download-icon svg {
    width: 22px;
    height: 22px;
}
 
.download-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
    text-align: left;
    min-width: 0;
}
 
.download-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
}
 
.download-meta {
    font-size: 12px;
    color: #a0a0b0;
}
 
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    color: #0a0e27;
    font-weight: 700;
    font-size: 14px;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.3s;
    white-space: nowrap;
    flex-shrink: 0;
}
 
.download-btn svg {
    width: 15px;
    height: 15px;
}
 
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(100, 200, 255, 0.4);
    opacity: 0.9;
}
 
/* Filtres */
.filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}
 
.filter-btn {
    padding: 12px 28px;
    background: rgba(100, 200, 255, 0.1);
    border: 1px solid rgba(100, 200, 255, 0.3);
    border-radius: 25px;
    color: #fff;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s;
}
 
.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    color: #0a0e27;
    border-color: transparent;
    transform: translateY(-2px);
}
 
/* Grille de projets */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 35px;
    margin-bottom: 60px;
}
 
/* Carte projet */
.project-card {
    background: rgba(20, 25, 45, 0.6);
    border: 2px dashed rgba(100, 200, 255, 0.4);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s;
    backdrop-filter: blur(10px);
    position: relative;
    animation: fadeInUp 0.8s ease-out;
}
 
.project-card:hover {
    transform: translateY(-10px);
    border-color: #64c8ff;
    box-shadow: 0 20px 50px rgba(100, 200, 255, 0.3);
    border-style: solid;
}
 
.project-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(100, 200, 255, 0.2), rgba(0, 255, 136, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
 
.project-image::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(100, 200, 255, 0.05) 10px,
        rgba(100, 200, 255, 0.05) 20px
    );
}
 
.project-image svg {
    width: 80px;
    height: 80px;
    color: #64c8ff;
    z-index: 1;
}
 
.project-placeholder-text {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 14, 39, 0.8);
    padding: 8px 16px;
    border-radius: 15px;
    font-size: 13px;
    color: #64c8ff;
    z-index: 2;
}
 
.project-content {
    padding: 30px;
}
 
.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}
 
.project-title {
    font-size: 22px;
    color: #fff;
    margin-bottom: 8px;
}
 
.project-category {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(100, 200, 255, 0.2);
    border: 1px solid rgba(100, 200, 255, 0.4);
    border-radius: 15px;
    font-size: 12px;
    color: #64c8ff;
    font-weight: 600;
}
 
.project-date {
    color: #00ff88;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 15px;
}
 
.project-description {
    color: #a0a0b0;
    line-height: 1.7;
    margin-bottom: 20px;
    min-height: 80px;
    font-size: 15px;
}
 
.project-description.placeholder {
    color: #64c8ff;
    font-style: italic;
    text-align: center;
}
 
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
 
.tag {
    padding: 5px 12px;
    background: rgba(100, 200, 255, 0.1);
    border: 1px solid rgba(100, 200, 255, 0.2);
    border-radius: 12px;
    font-size: 12px;
    color: #e0e0e0;
}
 
.project-footer {
    display: flex;
    gap: 12px;
}
 
.project-btn {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid rgba(100, 200, 255, 0.3);
    border-radius: 10px;
    background: rgba(100, 200, 255, 0.05);
    color: #64c8ff;
    text-decoration: none;
    text-align: center;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
 
.project-btn:hover {
    background: rgba(100, 200, 255, 0.15);
    border-color: #64c8ff;
    transform: translateY(-2px);
}
 
.project-btn svg {
    width: 16px;
    height: 16px;
}
 
/* Section d'ajout */
.add-project-section {
    background: linear-gradient(135deg, rgba(100, 200, 255, 0.05) 0%, rgba(0, 255, 136, 0.03) 100%);
    border: 2px dashed rgba(100, 200, 255, 0.3);
    border-radius: 25px;
    padding: 60px;
    text-align: center;
}
 
.add-project-section h3 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #64c8ff;
}
 
.add-project-section p {
    color: #a0a0b0;
    font-size: 16px;
    margin-bottom: 25px;
}
 
.add-btn {
    padding: 15px 35px;
    background: linear-gradient(45deg, #64c8ff, #00ff88);
    color: #0a0e27;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
 
.add-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(100, 200, 255, 0.4);
}
 
.add-btn svg {
    width: 20px;
    height: 20px;
}
 
/* Responsive */
@media (max-width: 1024px) {
    .main-container {
        padding: 110px 30px 60px;
    }
 
    .projects-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 25px;
    }
 
    .project-content {
        padding: 24px;
    }
 
    .page-title {
        font-size: 44px;
    }
 
    .intro-section {
        padding: 28px 24px;
    }
}
 
@media (max-width: 768px) {
    nav {
        padding: 15px 20px;
    }
 
    .nav-links {
        gap: 12px;
        flex-wrap: wrap;
        justify-content: flex-end;
    }
 
    .nav-links a {
        font-size: 14px;
    }
 
    .main-container {
        padding: 100px 20px 50px;
    }
 
    .page-title {
        font-size: 36px;
    }
 
    .page-subtitle {
        font-size: 17px;
    }
 
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
 
    .intro-section {
        padding: 24px 16px;
        margin-bottom: 40px;
    }
 
    .intro-badge {
        left: 20px;
        top: -12px;
        padding: 5px 14px;
        font-size: 12px;
    }
 
    .project-title {
        font-size: 20px;
    }
 
    .project-description {
        min-height: auto;
        font-size: 14px;
    }
 
    .project-content {
        padding: 20px;
    }
 
    .project-footer {
        flex-direction: column;
    }
 
    .project-btn {
        width: 100%;
    }
}
 
@media (max-width: 600px) {
    .download-block {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 16px 14px;
        gap: 12px;
    }
 
    .download-info {
        text-align: center;
    }
 
    .download-title {
        font-size: 14px;
    }
 
    .download-meta {
        font-size: 11px;
    }
 
    .download-btn {
        width: 100%;
    }
}