/* ==========================================================================
   Sidebar navigation (desktop) + top bar (mobile)
   ========================================================================== */

.sidebar {
    position: fixed;
    inset-block: 0;
    left: 0;
    width: var(--sidebar-width);
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    padding: 28px 22px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}
.sidebar-brand-mark {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: #fff;
    flex-shrink: 0;
}
.sidebar-brand-name { font-weight: 700; font-size: 1.05rem; line-height: 1.2; }
.sidebar-brand-role { font-size: 0.8rem; color: var(--text-muted); }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition-base);
}
.sidebar-nav a:hover { background: var(--bg-surface-alt); color: var(--text-primary); }
.sidebar-nav a.is-active { background: var(--gradient-primary); color: #fff; }
.sidebar-nav svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-cta {
    background: var(--gradient-secondary);
    border-radius: var(--radius-md);
    padding: 18px;
}
.sidebar-cta h4 { margin: 0 0 6px; font-size: 0.98rem; }
.sidebar-cta p { margin: 0 0 14px; font-size: 0.82rem; color: rgba(255,255,255,0.85); }
.sidebar-cta .btn { width: 100%; justify-content: center; background: #fff; color: var(--accent-purple); box-shadow: none; }

.sidebar-social {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: auto;
    padding-top: 4px;
}
.sidebar-social a {
    width: 34px; height: 34px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--bg-surface-alt);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-base);
}
.sidebar-social a:hover { background: var(--gradient-primary); color: #fff; }
.sidebar-social svg { width: 16px; height: 16px; }

.main-content { margin-left: var(--sidebar-width); }

/* Mobile top bar + off-canvas sidebar */
.topbar { display: none; }
.sidebar-overlay { display: none; }

@media (max-width: 960px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.is-open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,0.5); }
    .main-content { margin-left: 0; }

    .topbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        position: sticky;
        top: 0;
        z-index: 90;
        background: rgba(12, 14, 22, 0.9);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
        padding: 14px 20px;
    }
    .topbar-toggle {
        background: none; border: none; color: var(--text-primary);
        width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
    }
    .topbar-toggle svg { width: 24px; height: 24px; }

    .sidebar-overlay {
        display: none;
        position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99;
    }
    .sidebar-overlay.is-visible { display: block; }
}