:root {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #38bdf8;
    --secondary: #10b981;
    --accent: #fb7185;
    --border: #334155;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding-top: 70px; /* Space for fixed navbar */
}

/* --- Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.navbar-logo {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary);
}

.navbar-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 5px;
}

.navbar-menu li {
    margin: 0;
}

.navbar-menu a {
    color: var(--text);
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.navbar-menu a:hover {
    background: rgba(56, 189, 248, 0.1);
    color: var(--primary);
}

.navbar-cta {
    background-color: var(--primary);
    color: var(--bg) !important;
    padding: 10px 20px !important;
    font-weight: 600;
}

.navbar-cta:hover {
    background-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

/* --- Header --- */
header {
    text-align: center;
    padding: 80px 20px;
    background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

h1 { 
    color: var(--primary); 
    margin: 0; 
    font-size: 2.8rem; 
    letter-spacing: -1px; 
}

.subtitle { 
    font-size: 1.2rem; 
    color: var(--text-muted); 
    margin-top: 10px; 
}

.header-cta {
    margin-top: 30px;
}

.container { 
    max-width: 900px; 
    margin: auto; 
    padding: 20px; 
}

section { 
    margin-bottom: 50px; 
}

h2 { 
    border-left: 4px solid var(--primary); 
    padding-left: 15px; 
    margin-bottom: 25px; 
    font-size: 1.5rem; 
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* --- Profile Image / Initial --- */
.profile-initial {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: bold;
    color: var(--bg);
    margin: 0 auto;
}

/* --- Style À Propos --- */
.about-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 30px;
    align-items: center;
}

.about-image-container {
    text-align: center;
}

.highlight-box {
    border-left: 3px solid var(--secondary);
    background: rgba(16, 185, 129, 0.05);
    padding: 15px;
    font-style: italic;
    margin-top: 15px;
}

/* --- Style Formation --- */
.formation-content {
    display: grid;
    gap: 15px;
}

.formation-item {
    padding-left: 20px;
    border-left: 2px solid var(--border);
}

.formation-item strong {
    color: var(--primary);
}

/* --- Style Compétences --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.tag {
    background: rgba(56, 189, 248, 0.1);
    color: var(--primary);
    padding: 8px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* --- Style Réseaux Précis --- */
.net-grid {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 20px;
}

.net-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: 10px;
    transition: border-color 0.3s ease;
}

.net-card:hover {
    border-color: var(--primary);
}

.net-card h4 { 
    color: var(--secondary); 
    margin-top: 0; 
    display: flex; 
    align-items: center; 
    gap: 8px; 
}

.net-card ul { 
    padding-left: 18px; 
    margin-bottom: 0; 
}

.net-card li { 
    font-size: 0.9rem; 
    color: var(--text-muted); 
    margin-bottom: 8px; 
}

/* --- Style Projets --- */
.project-tags {
    margin-bottom: 15px;
}

.project-list {
    padding-left: 20px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.project-list li {
    margin-bottom: 8px;
}

.vuln-tag {
    background: rgba(251, 113, 133, 0.1);
    color: var(--accent);
    font-family: monospace;
    padding: 2px 6px;
    border-radius: 4px;
}

.project-actions {
    margin-top: 25px;
    text-align: center;
}

/* --- Style Certifications --- */
.certifications-container {
    text-align: center;
}

/* --- Style Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.contact-item {
    margin-bottom: 15px;
}

.contact-item:last-child {
    margin-bottom: 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    background-color: var(--primary);
    color: var(--bg);
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.2s;
}

.btn:hover { 
    transform: translateY(-2px); 
    filter: brightness(1.1); 
}

/* --- Footer --- */
footer { 
    text-align: center; 
    padding: 60px 20px; 
    color: var(--text-muted); 
    border-top: 1px solid var(--border); 
}

/* --- Links --- */
a { 
    color: var(--primary); 
    text-decoration: none; 
}

a:hover {
    text-decoration: underline;
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }

    .navbar-container {
        padding: 12px 15px;
    }

    .navbar-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
        gap: 0;
    }

    .navbar-menu.active {
        display: flex;
    }

    .navbar-menu li {
        width: 100%;
    }

    .navbar-menu a {
        display: block;
        padding: 12px 15px;
        width: 100%;
    }

    .navbar-toggle {
        display: block;
    }

    .about-grid { 
        grid-template-columns: 1fr; 
        text-align: center; 
    }

    h1 { 
        font-size: 2rem; 
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    }

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

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .profile-initial {
        width: 120px;
        height: 120px;
        font-size: 3rem;
    }

    .container {
        padding: 15px;
    }

    .card {
        padding: 20px;
    }
}