:root {
    --bg: #0f1419;
    --panel: #1a2332;
    --text: #e7ecf3;
    --muted: #9aa7b8;
    --accent: #3b82f6;
    --danger: #ef4444;
    --warn: #f59e0b;
    --ok: #22c55e;
    --border: #2a3648;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
    background: var(--panel);
    border-right: 1px solid var(--border);
    padding: 1.25rem;
}
.sidebar h1 { font-size: 1.1rem; margin: 0 0 1rem; }
.sidebar nav a {
    display: block;
    padding: .45rem .5rem;
    border-radius: 6px;
    color: var(--text);
    margin-bottom: .25rem;
}
.sidebar nav a:hover { background: #243044; text-decoration: none; }

.main { padding: 1.5rem 2rem; }
.topbar { display: flex; justify-content: flex-end; margin-bottom: 1rem; }

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stats { display: flex; gap: 1rem; flex-wrap: wrap; }
.stat { min-width: 140px; }
.stat .num { font-size: 1.6rem; font-weight: 700; }
.muted { color: var(--muted); }
.danger { color: var(--danger); }
.warn { color: var(--warn); }
.ok { color: var(--ok); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .4rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    border: 0;
    border-radius: 8px;
    padding: .5rem .9rem;
    cursor: pointer;
    font-size: .95rem;
}
.btn-secondary { background: #334155; }
.btn-danger { background: var(--danger); }
.btn-sm { padding: .35rem .65rem; font-size: .85rem; }

form label { display: block; margin: .65rem 0 .25rem; color: var(--muted); font-size: .9rem; }
input[type=text], input[type=password], input[type=date], input[type=number], textarea, select {
    width: 100%;
    max-width: 520px;
    background: #111827;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: .55rem .65rem;
}
textarea { min-height: 90px; }

.login-wrap { max-width: 420px; margin: 8vh auto; padding: 0 1rem; }
.flash { background: #14532d; border: 1px solid #166534; padding: .6rem .8rem; border-radius: 8px; margin-bottom: 1rem; }
.error { background: #450a0a; border: 1px solid #7f1d1d; padding: .6rem .8rem; border-radius: 8px; margin-bottom: 1rem; }

.badge {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    padding: .15rem .35rem;
    border-radius: 4px;
    vertical-align: middle;
    margin-right: .25rem;
}
.badge-change { background: #78350f; color: #fde68a; }
.cell-warn { background: rgba(245, 158, 11, 0.08); }
.table-scroll { overflow-x: auto; }

@media (max-width: 900px) {
    .layout { grid-template-columns: 1fr; }
    .sidebar { border-right: 0; border-bottom: 1px solid var(--border); }
    .grid-2 { grid-template-columns: 1fr; }
}