:root {
    --primary-color: #2d3436;
    --accent-color: #0984e3;
    --bg-color: #f5f6fa;
    --card-bg: #ffffff;
    --text-color: #2d3436;
    --gradient-start: #0984e3;
    --gradient-end: #00a8ff;
    --transition-duration: 0.3s;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    text-align: center;
    padding: 4rem 1rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    animation: shine 8s infinite linear;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    animation: fadeIn 2s ease;
}

.intro {
    text-align: center;
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    text-align: center;
    transition: all var(--transition-duration) cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.1);
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.project-card i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    transition: transform var(--transition-duration) ease;
}

.project-card:hover i {
    transform: scale(1.1);
}

.project-card {
    animation: cardAppear 0.6s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

@keyframes cardAppear {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all var(--transition-duration) ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
    background: linear-gradient(135deg, var(--gradient-end), var(--gradient-start));
}

footer {
    margin-top: auto;
    text-align: center;
    padding: 2rem;
    background-color: var(--accent-color);
    color: white;
}

.social-links {
    margin-bottom: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin: 0 0.5rem;
    transition: all var(--transition-duration) ease;
    display: inline-block;
}

.social-links a:hover {
    color: var(--accent-color);
    transform: translateY(-3px) scale(1.1);
}

/* Animation de transition de page */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary-color);
    z-index: 9999;
    transform: translateY(100%);
    transition: transform var(--transition-duration) ease-in-out;
}

.page-transition.active {
    transform: translateY(0);
}

/* Ajuster les liens pour la transition */
a {
    position: relative;
    transition: opacity var(--transition-duration) ease-in-out;
}

a.transitioning {
    opacity: 0.5;
    pointer-events: none;
}

@keyframes shine {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(100%) rotate(45deg);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 0.9; }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

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