.app-shell { min-height: 100vh; display: grid; grid-template-columns: var(--sidebar-width) 1fr; }
.sidebar { background: var(--color-primary); color: #fff; padding: 20px; position: sticky; top: 0; height: 100vh; }
.sidebar__brand { font-weight: 800; font-size: 18px; margin-bottom: 28px; letter-spacing: -0.02em; }
.sidebar__nav { display: grid; gap: 8px; }
.sidebar__link { padding: 10px 12px; border-radius: var(--radius-md); color: rgba(255,255,255,.84); }
.sidebar__link.router-link-active, .sidebar__link:hover { background: rgba(255,255,255,.12); color: #fff; }
.main { min-width: 0; }
.topbar { height: var(--topbar-height); background: var(--color-surface); border-bottom: 1px solid var(--color-border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; position: sticky; top: 0; z-index: 10; }
.content { padding: 24px; }
.page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-title { margin: 0; font-size: 26px; letter-spacing: -0.03em; }
.page-subtitle { margin: 6px 0 0; color: var(--color-muted); }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: radial-gradient(circle at top left, rgba(0,184,217,.15), transparent 38%), var(--color-bg); }
.login-card { width: min(420px, 100%); }