@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=Syne:wght@400;600;700;800&display=swap');

:root {
    --bg: #0a0a0f;
    --surface: #12121a;
    --surface2: #1a1a26;
    --accent: #00e5ff;
    --accent2: #7c3aed;
    --accent3: #f59e0b;
    --text: #e8e8f0;
    --muted: #6b6b8a;
    --border: #2a2a3a;
    --font-display: 'Syne', sans-serif;
    --font-mono: 'Space Mono', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-display);
    overflow-x: hidden;
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1000;
    opacity: 0.4;
}

/* ===== NAV ===== */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 3rem;
    background: rgba(10,10,15,0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-decoration: none;
    white-space: nowrap;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color 0.2s;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ===== PAGE WRAPPER ===== */
.page-content {
    padding-top: 80px;
    min-height: 100vh;
}

/* ===== HERO (index only) ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 2rem 3rem;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-glow {
    position: absolute;
    width: 600px; height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
    top: -100px; right: -100px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    max-width: 900px;
}

.hero-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hero-tag::before {
    content: '';
    width: 40px; height: 1px;
    background: var(--accent);
}

h1.hero-title {
    font-size: clamp(3rem, 8vw, 6.5rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

h1.hero-title .line1 { color: var(--text); display: block; }
h1.hero-title .line2 {
    display: block;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--muted);
    line-height: 1.7;
    max-width: 540px;
    margin-bottom: 2.5rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--surface);
}

.badge.accent { border-color: var(--accent); color: var(--accent); }
.badge.accent2 { border-color: var(--accent2); color: var(--accent2); }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.8rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-decoration: none;
    border-radius: 3px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover {
    background: #00b8cc;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,229,255,0.3);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* ===== PAGE HEADER (all pages except index) ===== */
.page-header {
    padding: 4rem 3rem 2rem;
    border-bottom: 1px solid var(--border);
    max-width: 1100px;
    margin: 0 auto;
}

.page-header .section-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.page-header .section-label::before {
    content: '';
    width: 30px; height: 1px;
    background: var(--accent);
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

/* ===== SECTION ===== */
.section {
    padding: 3rem 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

/* ===== CARDS ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.8rem;
    transition: border-color 0.2s, transform 0.2s;
}

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

.card-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 0.5rem; }
.card p { font-size: 0.9rem; color: var(--muted); line-height: 1.65; }

/* ===== GRID ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.col-full { grid-column: 1 / -1; }

/* ===== PROJECT CARDS ===== */
.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transform: scaleX(0);
    transition: transform 0.3s;
    transform-origin: left;
}

.project-card:hover::before { transform: scaleX(1); }
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); }

.project-num {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    margin-bottom: 1rem;
}

.project-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.project-card p {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 1.5rem;
}

.project-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }

.tag {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    padding: 0.3rem 0.6rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--muted);
    letter-spacing: 0.08em;
}

.comp-check { color: var(--accent); margin-right: 0.4rem; }

/* ===== STAGE CARDS ===== */
.stage-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2rem;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
    transition: border-color 0.2s;
    margin-bottom: 1.5rem;
}

.stage-card:hover { border-color: var(--accent2); }

.stage-meta { border-right: 1px solid var(--border); padding-right: 2rem; }

.stage-period {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent2);
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.stage-meta h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.5rem; line-height: 1.3; }
.stage-lieu { font-size: 0.8rem; color: var(--muted); }
.stage-content h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.75rem; }
.stage-content p { font-size: 0.88rem; color: var(--muted); line-height: 1.65; margin-bottom: 1rem; }

.stage-missions { list-style: none; }
.stage-missions li {
    font-size: 0.85rem;
    color: var(--muted);
    padding: 0.3rem 0 0.3rem 1.2rem;
    position: relative;
}
.stage-missions li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent2);
    font-size: 0.75rem;
}

/* ===== SKILL GROUPS ===== */
.skill-group {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.5rem;
}

.skill-group h3 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent3);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 0;
    font-size: 0.85rem;
    color: var(--muted);
}

.skill-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--accent3);
    flex-shrink: 0;
}

/* ===== DIVIDER ===== */
hr.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0 3rem;
    max-width: 1100px;
}

/* ===== FOOTER ===== */
footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 4rem;
}

footer p {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--muted);
    letter-spacing: 0.1em;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate { animation: fadeUp 0.6s ease forwards; opacity: 0; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    nav { padding: 1rem 1.5rem; }
    .nav-links { gap: 1rem; }
    .nav-links a { font-size: 0.72rem; }
    .hero { padding: 2rem 1.5rem; }
    .section, .page-header { padding-left: 1.5rem; padding-right: 1.5rem; }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    .stage-card { grid-template-columns: 1fr; }
    .stage-meta { border-right: none; border-bottom: 1px solid var(--border); padding-right: 0; padding-bottom: 1.5rem; }
    footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}