:root {
    --bg: #0f1420;
    --bg-card: #171d2b;
    --bg-card-hover: #1c2333;
    --border: #262e42;
    --text: #e8ecf4;
    --text-dim: #8a93a8;
    --accent: #3b82f6;
    --accent-dim: #1e3a5f;
    --green: #22c55e;
    --red: #ef4444;
    --gold: #eab308;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }

/* ---------- LOGIN ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 36px;
    width: 100%;
    max-width: 380px;
}
.login-box h1 {
    font-size: 20px;
    margin: 0 0 4px;
}
.login-box p.subtitle {
    color: var(--text-dim);
    margin: 0 0 28px;
    font-size: 13px;
}

/* ---------- LAYOUT ---------- */
.app {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 220px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    flex-shrink: 0;
}
.sidebar .brand {
    padding: 0 20px 20px;
    font-weight: 700;
    font-size: 17px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}
.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    color: var(--text-dim);
    font-size: 14px;
    font-weight: 500;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { color: var(--text); background: var(--bg-card-hover); }
.sidebar nav a.active {
    color: var(--text);
    background: var(--accent-dim);
    border-left-color: var(--accent);
}
.sidebar .user-box {
    margin-top: 24px;
    padding: 14px 20px;
    border-top: 1px solid var(--border);
}
.sidebar .user-box .uname { font-size: 13px; font-weight: 600; }
.sidebar .user-box .role { font-size: 11px; color: var(--text-dim); text-transform: uppercase; }
.sidebar .logout { display: block; margin-top: 10px; font-size: 12.5px; color: var(--red); }

.main { flex: 1; padding: 28px 32px; max-width: 1100px; }
.main h1 { margin: 0 0 4px; font-size: 22px; }
.main .page-sub { color: var(--text-dim); font-size: 13.5px; margin-bottom: 24px; }

/* ---------- CARDS / STATS ---------- */
.stat-row { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    flex: 1;
    min-width: 160px;
}
.stat-card .label { color: var(--text-dim); font-size: 12.5px; text-transform: uppercase; letter-spacing: .03em; }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.stat-card.green .value { color: var(--green); }
.stat-card.red .value { color: var(--red); }
.stat-card.gold .value { color: var(--gold); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin-bottom: 20px;
}
.card h2 { margin: 0 0 16px; font-size: 16px; }

/* ---------- FORMS ---------- */
.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 12.5px; color: var(--text-dim); }
input, select {
    background: #0f1420;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 12px;
    border-radius: 7px;
    font-size: 14px;
    font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
button, .btn {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 7px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
button:hover, .btn:hover { background: #2563eb; }
button.danger, .btn.danger { background: var(--red); }
button.danger:hover { background: #dc2626; }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text-dim); }

/* ---------- TABLE ---------- */
table { width: 100%; border-collapse: collapse; margin-top: 4px; }
th, td { text-align: left; padding: 10px 12px; font-size: 13.5px; border-bottom: 1px solid var(--border); }
th { color: var(--text-dim); font-weight: 600; text-transform: uppercase; font-size: 11.5px; letter-spacing: .03em; }
tr:last-child td { border-bottom: none; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.total-row td { font-weight: 700; border-top: 2px solid var(--border); }

.badge { padding: 3px 9px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge.in-stock { background: rgba(34,197,94,.15); color: var(--green); }
.badge.out-stock { background: rgba(239,68,68,.15); color: var(--red); }

.month-nav { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.month-nav a { padding: 6px 12px; border: 1px solid var(--border); border-radius: 7px; font-size: 13px; }
.month-nav .current { font-weight: 700; font-size: 15px; }

.alert { padding: 12px 16px; border-radius: 7px; font-size: 13.5px; margin-bottom: 16px; }
.alert.error { background: rgba(239,68,68,.12); color: #fca5a5; border: 1px solid rgba(239,68,68,.3); }
.alert.success { background: rgba(34,197,94,.12); color: #86efac; border: 1px solid rgba(34,197,94,.3); }

.delete-link { color: var(--red); font-size: 12.5px; }
.icon-btn { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 13px; padding: 4px 8px; }
.icon-btn:hover { color: var(--text); }

@media (max-width: 800px) {
    .app { flex-direction: column; }
    .sidebar { width: 100%; padding: 14px 0; }
    .sidebar nav { display: flex; overflow-x: auto; }
    .sidebar nav a { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
    .sidebar nav a.active { border-left: none; border-bottom-color: var(--accent); }
    .sidebar .user-box { display: none; }
    .main { padding: 20px 16px; }
}