:root {
    color-scheme: light;
    --ink: #172033;
    --muted: #667085;
    --line: #d9e1ea;
    --panel: #ffffff;
    --bg: #eef3f6;
    --accent: #0f766e;
    --accent-2: #2563eb;
    --accent-weak: #e7f5f2;
    --warning: #b7791f;
    --danger: #b42318;
    --shadow: 0 18px 45px rgba(17, 24, 39, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #dfeef1 0, #eef3f6 320px, #f7f9fb 100%);
}

a {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}

button, input, select { font: inherit; }

.admin-shell {
    width: min(1440px, calc(100% - 40px));
    margin: 0 auto;
    padding: 24px 0 48px;
}

.topbar {
    display: grid;
    grid-template-columns: minmax(280px, 1fr) auto auto;
    gap: 18px;
    align-items: center;
    margin-bottom: 20px;
    padding: 24px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.topbar p, .login-panel p {
    margin: 0 0 6px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.topbar h1, .login-panel h1 {
    margin: 0;
    color: var(--ink);
    font-size: 32px;
    line-height: 1.1;
}

.subhead {
    display: block;
    margin-top: 8px;
    color: var(--muted);
    font-size: 14px;
}

.topbar nav {
    display: flex;
    gap: 10px;
}

.topbar nav a {
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 8px 12px;
    background: #f8fafc;
}

.status, .pill, .notice {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    border-radius: 999px;
    border: 1px solid #a8d8d0;
    background: var(--accent-weak);
    color: #075e57;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 800;
}

.notice {
    width: 100%;
    margin-bottom: 16px;
    border-radius: 8px;
}

.notice.bad {
    background: #fff1f0;
    border-color: #fecdca;
    color: var(--danger);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(150px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}

.metrics-grid article, .panel, .service-grid article, .ops-grid section, .login-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 10px 28px rgba(17, 24, 39, 0.055);
}

.metrics-grid article {
    min-height: 122px;
    padding: 16px;
    border-top: 4px solid var(--accent);
}

.metrics-grid article:nth-child(3n) { border-top-color: var(--warning); }
.metrics-grid article:nth-child(4n) { border-top-color: var(--accent-2); }

.metrics-grid span, .panel-head span, td span, .user-list span, .service-grid span, .ops-grid span, .ops-grid small, .metrics-grid small {
    display: block;
    color: var(--muted);
    font-size: 12px;
}

.metrics-grid strong {
    display: block;
    margin: 12px 0 7px;
    font-size: 30px;
    line-height: 1;
}

.layout {
    display: grid;
    grid-template-columns: minmax(310px, 390px) minmax(0, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.panel {
    padding: 20px;
}

.panel.wide { min-width: 0; }

.panel-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: start;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
}

.panel h2 {
    margin: 0;
    font-size: 19px;
}

.stack-form {
    display: grid;
    gap: 12px;
}

.stack-form label {
    display: grid;
    gap: 6px;
    color: #445166;
    font-size: 12px;
    font-weight: 800;
}

input, select {
    width: 100%;
    min-height: 42px;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    padding: 9px 11px;
    color: var(--ink);
    background: #fff;
}

input:focus, select:focus {
    border-color: var(--accent);
    outline: 3px solid rgba(15, 118, 110, 0.12);
}

button {
    min-height: 38px;
    border: 1px solid #0b5f58;
    border-radius: 7px;
    padding: 8px 13px;
    color: #fff;
    background: var(--accent);
    font-weight: 800;
    cursor: pointer;
}

button:hover { filter: brightness(0.96); }

button.danger {
    border-color: var(--danger);
    background: var(--danger);
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

th, td {
    border-bottom: 1px solid var(--line);
    padding: 13px 10px;
    text-align: left;
    vertical-align: middle;
}

th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
}

tbody tr:hover {
    background: #f8fafc;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.actions form { margin: 0; }

.actions button {
    min-height: 32px;
    padding: 6px 10px;
}

.user-list {
    display: grid;
    gap: 10px;
}

.user-list div {
    border: 1px solid var(--line);
    border-radius: 7px;
    padding: 12px;
    background: #fbfcfd;
}

.ops-grid, .service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 12px;
}

.ops-grid section, .service-grid article {
    padding: 14px;
    background: #fbfcfd;
}

.ops-grid strong {
    display: block;
    margin: 8px 0 5px;
    color: var(--ink);
}

.ops-grid p {
    margin: 0 0 9px;
    color: #445166;
    font-size: 13px;
}

.service-grid strong, .service-grid a {
    display: block;
    margin-bottom: 8px;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-panel {
    width: min(430px, 100%);
    padding: 26px;
    box-shadow: var(--shadow);
}

.login-panel h1 {
    margin-bottom: 18px;
}

.login-panel a {
    display: inline-block;
    margin-top: 16px;
}

@media (max-width: 1120px) {
    .metrics-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
    .admin-shell { width: min(100% - 24px, 720px); }
    .topbar, .layout { grid-template-columns: 1fr; }
    .topbar nav { justify-content: flex-start; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
    .metrics-grid { grid-template-columns: 1fr; }
    .topbar h1, .login-panel h1 { font-size: 26px; }
}