:root {
    --mc-sidebar-w: 250px;
    --mc-sidebar-bg: #111827;
    --mc-sidebar-fg: #cbd5e1;
    --mc-sidebar-muted: #64748b;
    --mc-accent: #2563eb;
    --mc-bg: #f4f6f9;
}
body { background: var(--mc-bg); font-size: .925rem; }
.mc-shell { display: flex; min-height: 100vh; }
.mc-sidebar { width: var(--mc-sidebar-w); background: var(--mc-sidebar-bg); color: var(--mc-sidebar-fg); flex-shrink: 0; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.mc-brand { display: flex; align-items: center; gap: .6rem; padding: 1.1rem 1.25rem; color: #fff; font-weight: 600; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.06); }
.mc-brand i { color: var(--mc-accent); font-size: 1.25rem; }
.mc-menu { list-style: none; margin: 0; padding: .5rem 0; }
.mc-menu .mc-menu { padding: 0 0 0 .75rem; }
.mc-menu-header { padding: 1rem 1.25rem .35rem; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; color: var(--mc-sidebar-muted); }
.mc-menu-link { display: flex; align-items: center; gap: .7rem; padding: .5rem 1.25rem; color: var(--mc-sidebar-fg); text-decoration: none; border-left: 3px solid transparent; }
.mc-menu-link:hover { color: #fff; background: rgba(255,255,255,.04); }
.mc-menu-link.active { color: #fff; background: rgba(37,99,235,.18); border-left-color: var(--mc-accent); }
.mc-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.mc-topbar { display: flex; align-items: center; gap: .75rem; padding: .75rem 1.5rem; background: #fff; border-bottom: 1px solid #e5e7eb; }
.mc-title { font-size: 1.1rem; font-weight: 600; margin: 0; }
.mc-content { padding: 1.5rem; }
.card { border: 1px solid #e5e7eb; box-shadow: 0 1px 2px rgba(0,0,0,.03); }
@media (max-width: 991.98px) {
    .mc-sidebar { position: fixed; left: calc(-1 * var(--mc-sidebar-w)); z-index: 1040; transition: left .2s; }
    .mc-sidebar.open { left: 0; }
}
.mc-login-body { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #111827, #1e3a8a); }
.mc-login-card { width: 100%; max-width: 380px; background: #fff; border-radius: .75rem; padding: 2rem; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.mc-login-brand { font-size: 1.25rem; font-weight: 600; text-align: center; margin-bottom: 1.5rem; }
.mc-login-brand i { color: var(--mc-accent); }