:root{--sidebar-width:280px;--sidebar-bg:#1a1d20;--content-bg:#f8f9fa}body{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background-color:var(--content-bg)}.wrapper{display:flex;width:100%;align-items:stretch}#sidebar{min-width:var(--sidebar-width);max-width:var(--sidebar-width);background:var(--sidebar-bg);color:#fff;transition:.3s;min-height:100vh;z-index:1000}#sidebar.active{margin-left:calc(-1 * var(--sidebar-width))}#sidebar .nav-link{color:rgba(255,255,255,.7);transition:.2s}#sidebar .nav-link:hover,#sidebar li.active .nav-link{color:#fff;background:rgba(255,255,255,.1)}#content{width:100%;min-height:100vh;transition:.3s}.navbar{padding:15px 10px;background:#fff;border:none;border-radius:0;box-shadow:1px 1px 3px rgba(0,0,0,.05)}.card{transition:transform .2s}.card-body h3{font-size:1.8rem;font-weight:700}.table thead th{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;font-weight:600;color:#6c757d;border-top:none}.badge-unread{width:8px;height:8px;border-radius:50%;background-color:#0d6efd;display:inline-block;margin-right:5px}.file-preview{width:48px;height:48px;object-fit:cover;border-radius:6px;background:#e9ecef;display:flex;align-items:center;justify-content:center}@media (max-width:992px){#sidebar{margin-left:calc(-1 * var(--sidebar-width));position:fixed}#sidebar.active{margin-left:0}#content{width:100%}}.auth-card{border:none;border-radius:12px}