:root {
    --bg: #f3f5f8;
    --sidebar: #102033;
    --sidebar-2: #16304a;
    --text: #1b2430;
    --muted: #667085;
    --line: #e4e7ec;
    --card: #ffffff;
    --accent: #0d9488;
    --accent-dark: #0f766e;
    --danger: #dc2626;
    --hot: #ea580c;
    --warn: #d97706;
    --caution: #ca8a04;
    --ok: #059669;
    --shadow: 0 8px 24px rgba(16, 32, 51, 0.06);
    --radius: 12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.45;
}

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

.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 250px;
    background: linear-gradient(180deg, var(--sidebar), var(--sidebar-2));
    color: #dbe7f3;
    display: flex;
    flex-direction: column;
    padding: 22px 16px;
    flex-shrink: 0;
}
.brand { display: flex; gap: 12px; align-items: center; margin-bottom: 28px; }
.brand-mark {
    width: 40px; height: 40px; border-radius: 10px;
    background: var(--accent); color: #fff;
    display: grid; place-items: center; font-weight: 700;
}
.brand strong { display: block; color: #fff; font-size: 15px; }
.brand small { color: #93a4b8; }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; }
.sidebar nav a {
    color: #d7e3ef; padding: 10px 12px; border-radius: 8px; text-decoration: none;
}
.sidebar nav a:hover, .sidebar nav a.active {
    background: rgba(255,255,255,0.08);
    color: #fff;
    text-decoration: none;
}
.sidebar-foot { margin-top: auto; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); }
.who { color: #fff; font-size: 14px; margin-bottom: 6px; }
.logout { color: #93a4b8; font-size: 13px; }

.main { flex: 1; min-width: 0; }
.topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 22px 28px 8px;
}
.topbar h1 { margin: 0; font-size: 24px; }
.topbar-meta { color: var(--muted); font-size: 13px; }
.content { padding: 12px 28px 40px; }

.flash {
    padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; font-size: 14px;
}
.flash-success { background: #ecfdf3; color: #067647; }
.flash-error { background: #fef3f2; color: #b42318; }
.flash-info { background: #eff8ff; color: #175cd3; }

.cards { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; margin-bottom: 20px; }
.card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 16px 18px;
}
.card a { color: inherit; text-decoration: none; display: block; }
.card a:hover { text-decoration: none; }
.card .label { color: var(--muted); font-size: 13px; }
.card .value { font-size: 28px; font-weight: 700; margin-top: 6px; }
.card.expired .value { color: var(--danger); }
.card.d7 .value { color: var(--hot); }
.card.d30 .value { color: var(--warn); }
.card.d60 .value { color: var(--caution); }
.card.healthy .value { color: var(--ok); }

.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.panel-h { padding: 14px 18px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.panel-h h2 { margin: 0; font-size: 16px; }
.panel-b { padding: 16px 18px; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; align-items: center; }
.toolbar form { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; flex: 1; }

input, select, textarea {
    font: inherit; color: var(--text);
    border: 1px solid #d0d5dd; border-radius: 8px;
    padding: 9px 11px; background: #fff;
}
input:focus, select:focus, textarea:focus {
    outline: 2px solid #99f6e4; border-color: var(--accent);
}
textarea { width: 100%; min-height: 140px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .full { grid-column: 1 / -1; }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    border: 0; border-radius: 8px; padding: 9px 14px; cursor: pointer;
    font: inherit; text-decoration: none; background: #e8edf3; color: var(--text);
}
.btn:hover { text-decoration: none; filter: brightness(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-danger { background: #fee4e2; color: #b42318; }
.btn-warn { background: #fef0c7; color: #b54708; }
.btn-sm { padding: 6px 10px; font-size: 13px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); font-size: 14px; vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:hover td { background: #f8fafc; }

.badge {
    display: inline-block; border-radius: 999px; padding: 3px 8px;
    font-size: 12px; font-weight: 600;
}
.badge-danger { background: #fee4e2; color: #b42318; }
.badge-hot { background: #ffead5; color: #c4320a; }
.badge-warn { background: #fef0c7; color: #b54708; }
.badge-caution { background: #fef9c3; color: #a16207; }
.badge-ok { background: #d1fadf; color: #067647; }
.badge-muted { background: #f2f4f7; color: #475467; }
.badge-info { background: #d1e9ff; color: #175cd3; }

.muted { color: var(--muted); }
.empty { padding: 28px 8px; text-align: center; color: var(--muted); }

.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; padding: 12px 18px; }
.pager a, .pager span { padding: 6px 10px; border-radius: 6px; background: #f2f4f7; color: var(--text); text-decoration: none; }

.login-wrap {
    min-height: 100vh; display: grid; place-items: center; padding: 24px;
    background: linear-gradient(160deg, #102033, #0d9488 160%);
}
.login-card {
    width: min(420px, 100%); background: #fff; border-radius: 16px;
    padding: 28px; box-shadow: 0 20px 50px rgba(0,0,0,.18);
}
.login-card h1 { margin: 0 0 6px; font-size: 24px; }
.login-card p { margin: 0 0 20px; color: var(--muted); }
.login-card form { display: grid; gap: 12px; }
.login-card .btn { width: 100%; }

.device { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #98a2b3; }
.dot.ok { background: var(--ok); }
.dot.bad { background: var(--danger); }

.two-col { display: grid; grid-template-columns: 1.4fr .8fr; gap: 16px; }
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 12px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }

@media (max-width: 1100px) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .two-col, .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 800px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; }
    .sidebar nav { flex-direction: row; flex-wrap: wrap; }
}