:root {
    --bg: #f6f7f9;
    --panel: #ffffff;
    --text: #17202a;
    --muted: #667085;
    --line: #d9dee7;
    --primary: #176b87;
    --primary-dark: #0f5268;
    --accent: #8a5a16;
    --danger: #b42318;
    --success: #067647;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.topbar { display: flex; align-items: center; gap: 18px; padding: 14px 22px; background: #102a43; color: #fff; position: sticky; top: 0; z-index: 10; }
.brand { color: #fff; font-weight: 800; font-size: 18px; white-space: nowrap; }
.topbar nav { display: flex; gap: 12px; flex: 1; overflow-x: auto; }
.topbar nav a { color: #e6edf5; font-size: 14px; }
.topbar form { margin: 0; }
.topbar button { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); padding: 8px 10px; border-radius: 6px; }
.shell { width: min(1180px, calc(100vw - 28px)); margin: 22px auto 60px; }
.notice, .muted { color: var(--muted); }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 24px 0 16px; }
h1 { margin: 0; font-size: 30px; line-height: 1.15; }
h2 { margin: 0 0 14px; font-size: 18px; }
p { line-height: 1.55; }
.grid { display: grid; gap: 16px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 16px 0; }
.metrics article, .panel, .login-panel { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 18px; box-shadow: 0 1px 2px rgba(16, 42, 67, .04); }
.metrics strong { display: block; font-size: 28px; }
.metrics span, small { color: var(--muted); }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }
.button, button { display: inline-flex; align-items: center; justify-content: center; min-height: 38px; padding: 9px 13px; border-radius: 7px; border: 1px solid var(--line); background: #fff; color: var(--text); font-weight: 650; cursor: pointer; }
.button.primary, button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.button.primary:hover, button.primary:hover { background: var(--primary-dark); text-decoration: none; }
.stack { display: grid; gap: 14px; }
label { display: grid; gap: 7px; font-weight: 650; }
input, textarea, select { width: 100%; border: 1px solid var(--line); border-radius: 7px; padding: 10px 11px; font: inherit; background: #fff; color: var(--text); }
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus, button:focus, a:focus { outline: 3px solid rgba(23, 107, 135, .25); outline-offset: 2px; }
.check { display: flex; align-items: center; gap: 8px; }
.check input { width: auto; }
.list { display: grid; gap: 8px; }
.list a, .list > div { display: grid; gap: 3px; padding: 11px; border: 1px solid var(--line); border-radius: 7px; background: #fbfcfd; }
.empty { color: var(--muted); margin: 0; }
.alert, .success { padding: 12px 14px; border-radius: 7px; margin: 12px 0; }
.alert { background: #fff1f0; color: var(--danger); border: 1px solid #ffccc7; }
.success { background: #edfcf2; color: var(--success); border: 1px solid #abefc6; }
.badge { display: inline-flex; padding: 4px 9px; border-radius: 999px; background: #edf4f7; color: var(--primary-dark); font-size: 13px; font-weight: 700; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: .04em; }
.source { white-space: pre-wrap; overflow-wrap: anywhere; background: #f8fafc; border: 1px solid var(--line); border-radius: 7px; padding: 14px; max-height: 560px; overflow: auto; }
.guest { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #eef5f7, #f8f5ef); }
.login-shell { width: min(430px, calc(100vw - 28px)); }
.login-panel h1 { margin-bottom: 6px; }

@media (max-width: 780px) {
    .topbar { align-items: flex-start; flex-wrap: wrap; }
    .topbar nav { order: 3; width: 100%; }
    .page-head, .grid.two { grid-template-columns: 1fr; display: grid; }
    .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 460px) {
    .metrics { grid-template-columns: 1fr; }
    h1 { font-size: 25px; }
}