:root {
  --brand: #e3232a;
  --brand-dark: #b81b21;
  --ink: #1b1f2a;
  --muted: #6b7280;
  --sidebar: #15171f;
  --line: #e6e8ee;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: #f4f5f8; color: var(--ink); }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: radial-gradient(1200px 600px at 50% -10%, #2a2d3a, #15171f); padding: 20px; }
.login-card { width: 100%; max-width: 380px; background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 30px 60px rgba(0,0,0,.35); }
.login-brand { text-align: center; margin-bottom: 22px; line-height: 1; }
.brand-mark { font-weight: 800; letter-spacing: 1px; color: var(--brand); font-size: 26px; display: block; }
.brand-sub { font-size: 11px; letter-spacing: 3px; color: var(--muted); }

/* Shell */
#appShell { display: flex; min-height: 100vh; }
.sidebar { width: 250px; background: var(--sidebar); color: #cfd2dc; display: flex; flex-direction: column; padding: 20px 14px; position: fixed; inset: 0 auto 0 0; z-index: 1040; }
.sidebar-brand { padding: 6px 10px 22px; line-height: 1; }
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar-nav a { display: flex; align-items: center; gap: 10px; color: #cfd2dc; text-decoration: none; padding: 11px 14px; border-radius: 10px; font-size: 14.5px; font-weight: 500; }
.sidebar-nav a i { font-size: 17px; }
.sidebar-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.sidebar-nav a.active { background: var(--brand); color: #fff; }
.logout-btn { margin-top: auto; }

.content { flex: 1; margin-left: 250px; min-width: 0; }
.topbar { background: #fff; border-bottom: 1px solid var(--line); padding: 16px 26px; display: flex; align-items: center; gap: 14px; position: sticky; top: 0; z-index: 1020; }
.view-root { padding: 26px; }

/* Cards / stats */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.stat-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px; display: flex; align-items: center; gap: 14px; }
.stat-ic { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; color: #fff; background: var(--brand); flex: none; }
.stat-card h3 { margin: 0; font-size: 26px; font-weight: 800; }
.stat-card span { color: var(--muted); font-size: 13px; }

.panel { background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.panel-head { display: flex; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.panel-head h5 { margin: 0; }
.table thead th { background: #fafbfc; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
.table td { vertical-align: middle; font-size: 14px; }
.thumb { width: 54px; height: 40px; object-fit: cover; border-radius: 6px; background: #eee; }
.row-unread { background: #fff7f7; }
.btn-danger { background: var(--brand); border-color: var(--brand); }
.btn-danger:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
.text-brand { color: var(--brand); }

.app-toast { position: fixed; bottom: 24px; right: 24px; background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 10px; font-size: 14px; opacity: 0; transform: translateY(10px); transition: .25s; z-index: 2000; pointer-events: none; }
.app-toast.show { opacity: 1; transform: translateY(0); }
.app-toast.err { background: var(--brand-dark); }

.empty { text-align: center; padding: 50px 20px; color: var(--muted); }

@media (max-width: 991.98px) {
  .sidebar { transform: translateX(-100%); transition: .25s; }
  .sidebar.open { transform: translateX(0); }
  .content { margin-left: 0; }
}