:root {
    --blue: #3b82f6;
    --blue-dim: rgba(59, 130, 246, 0.10);
    --blue-glow: rgba(59, 130, 246, 0.30);
    --indigo: #6366f1;

    --bg-base: #0a0a0f;
    --bg-card: #0f1117;
    --bg-elevated: #161b27;

    --border: rgba(255,255,255,0.06);
    --border-strong: rgba(255,255,255,0.11);

    --text-primary: #e8edf2;
    --text-secondary: #64748b;
    --text-muted: #374151;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;

    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.18s ease;

    --nav-height: 64px;
}

/* ── NAVBAR ─────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.80);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.97);
    border-bottom-color: var(--border-strong);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

/* ── LOGO ───────────────────────────────────────────── */
.nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    flex-shrink: 0;
    transition: var(--transition);
    letter-spacing: -0.02em;
}

.nav-logo-icon {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--blue), var(--indigo));
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.nav-logo:hover { color: var(--blue); }

/* ── NAV LINKS ──────────────────────────────────────── */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    flex: 1;
    justify-content: flex-end;
}

.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.855rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}
.nav-links a i { font-size: 0.75rem; }
.nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}
.nav-links a.active {
    color: var(--blue);
    background: var(--blue-dim);
}

/* Upload / CTA button */
.nav-links a.nav-cta {
    background: var(--blue);
    color: #fff;
    border-radius: var(--radius-sm);
    padding: 7px 16px;
    font-weight: 600;
    margin-left: 0.4rem;
}
.nav-links a.nav-cta:hover {
    background: #2563eb;
    box-shadow: 0 4px 14px var(--blue-glow);
    transform: translateY(-1px);
    color: #fff;
}

/* Logout */
.nav-links a[href*="deconnexion"] { color: var(--text-muted); }
.nav-links a[href*="deconnexion"]:hover { color: #ef4444; background: rgba(239,68,68,0.08); }

/* ── HAMBURGER ──────────────────────────────────────── */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    cursor: pointer;
    padding: 7px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: 1px solid var(--border);
    transition: var(--transition);
    flex-shrink: 0;
}
.menu-toggle:hover { border-color: var(--border-strong); background: var(--bg-elevated); }
.menu-toggle span {
    width: 18px; height: 1.5px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: var(--transition);
    display: block;
}
.menu-toggle span.active:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.menu-toggle span.active:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle span.active:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ── RESPONSIVE ─────────────────────────────────────── */
@media (max-width: 860px) {
    .menu-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0; right: 0;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border-strong);
        padding: 1rem 1.25rem 1.5rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.2rem;
        transform: translateY(-110%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: 0 16px 40px rgba(0,0,0,0.5);
    }
    .nav-links.active { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-links a { padding: 10px 12px; justify-content: flex-start; }
    .nav-links a.nav-cta { margin-left: 0; margin-top: 0.4rem; justify-content: center; }
}
@media (max-width: 480px) {
    .nav-container { padding: 0 1rem; }
}