:root {
   --client-primary: #2563eb;
   --client-secondary: #0f172a;
   --bg-app: #f3f4f6;
   --card-bg: #ffffff;
   --border-color: #e5e7eb;
   --text-main: #111827;
   --text-muted: #6b7280;
   --shadow-soft: 0 8px 24px rgba(15, 23, 42, 0.08);
   --radius-md: 12px;
   --radius-lg: 16px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--bg-app); color: var(--text-main); }
a { color: inherit; text-decoration: none; }
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth-card { width: 100%; max-width: 440px; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); padding: 28px; }
.auth-brand { text-align: center; margin-bottom: 18px; }
.auth-brand h1 { margin: 0; font-size: 1.4rem; color: var(--client-secondary); }
.auth-brand p { margin: 6px 0 0; color: var(--text-muted); font-size: 0.92rem; }
.form-group { margin-bottom: 14px; }
.form-label { display: block; margin-bottom: 6px; font-size: 0.9rem; color: var(--text-main); }
.form-control { width: 100%; border: 1px solid var(--border-color); border-radius: 10px; padding: 10px 12px; font-size: 0.96rem; background: #fff; }
.form-control:focus { outline: 0; border-color: var(--client-primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--client-primary) 14%, transparent); }
.btn { border: 0; border-radius: 10px; padding: 10px 14px; font-size: 0.95rem; cursor: pointer; }
.btn-primary { background: var(--client-primary); color: #fff; width: 100%; }
.btn-primary:hover { filter: brightness(0.95); }
.btn-secondary { background: var(--client-secondary); color: #fff; }
.btn-secondary:hover { filter: brightness(1.1); }
.alert { padding: 10px 12px; border-radius: 10px; border: 1px solid transparent; margin-bottom: 14px; font-size: 0.9rem; }
.alert-danger { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-info { background: #eff6ff; border-color: #bfdbfe; color: #1e3a8a; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #92400e; }
.badge { display: inline-block; font-size: 0.78rem; padding: 3px 9px; border-radius: 999px; background: #dbeafe; color: #1e3a8a; }
.badge-primary { background: var(--client-primary); color: #fff; }
.app-shell { min-height: 100vh; display: grid; grid-template-columns: 250px 1fr; }
.sidebar { background: var(--client-secondary); color: #fff; padding: 18px 14px; border-right: 1px solid rgba(255, 255, 255, 0.08); }
.sidebar-brand { font-weight: 700; margin: 0 0 16px; }
.sidebar-link { display: block; padding: 10px 12px; border-radius: 10px; color: #e5e7eb; margin-bottom: 6px; }
.sidebar-link:hover, .sidebar-link.active { background: rgba(255, 255, 255, 0.12); color: #fff; }
.sidebar-link:focus { outline: 2px solid var(--client-primary); outline-offset: 2px; }
.topbar { background: var(--card-bg); border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; }
.content { padding: 16px; }
.grid-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.card { background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius-md); box-shadow: var(--shadow-soft); padding: 14px; }
.footer { margin-top: 14px; background: var(--card-bg); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 12px; color: var(--text-muted); font-size: 0.9rem; }
.mobile-toggle { display: none; border: 1px solid var(--border-color); background: #fff; border-radius: 10px; padding: 8px 10px; }
@media (max-width: 992px) { .app-shell { grid-template-columns: 1fr; } .sidebar { position: fixed; top: 0; left: -270px; width: 250px; height: 100vh; z-index: 40; transition: left 0.2s ease; } .sidebar.open { left: 0; } .mobile-toggle { display: inline-block; } .grid-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .auth-card { padding: 22px; } .grid-cards { grid-template-columns: 1fr; } }