:root {
    color-scheme: dark;
    --bg: #0a0f18;
    --surface: #111927;
    --surface-2: #172235;
    --line: #25344b;
    --text: #f4f7fb;
    --muted: #9ba9bd;
    --accent: #38bdf8;
    --accent-strong: #0ea5e9;
    --good: #34d399;
    --warn: #fbbf24;
    --bad: #fb7185;
    --radius: 14px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at 75% 0%, #102239 0, transparent 34rem), var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

a { color: var(--accent); }

.topbar {
    min-height: 68px;
    padding: 0 4vw;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    background: rgba(10, 15, 24, .86);
    backdrop-filter: blur(12px);
}

.brand { display: flex; align-items: center; gap: 12px; color: var(--text); font-weight: 750; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: var(--accent); color: #06111c; }
.topnav { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: .9rem; }
.topnav form { margin: 0; }
.link-button { border: 0; background: transparent; color: var(--accent); font: inherit; cursor: pointer; padding: 6px; }
.container { width: min(1440px, 92vw); margin: 0 auto; padding: 48px 0 72px; }
.page-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.page-heading.compact { align-items: start; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 4px; font-size: clamp(1.8rem, 3vw, 2.6rem); letter-spacing: -.035em; }
h2 { font-size: 1.25rem; }
.eyebrow { margin-bottom: 8px; color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.muted { color: var(--muted); }
.back-link { display: inline-block; margin-bottom: 14px; color: var(--muted); text-decoration: none; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 10px; font: inherit; font-weight: 750; text-decoration: none; cursor: pointer; }
.button-primary { background: var(--accent); color: #06111c; }
.button-primary:hover { background: var(--accent-strong); }
.button-secondary { background: var(--surface-2); border-color: var(--line); color: var(--text); }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 18px; }
.summary-grid article { padding: 20px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(145deg, var(--surface-2), var(--surface)); }
.summary-grid strong { display: block; font-size: 2rem; line-height: 1.1; }
.summary-grid span { color: var(--muted); font-size: .88rem; }
.panel-card, .form-card, .pairing-card { border: 1px solid var(--line); border-radius: var(--radius); background: rgba(17, 25, 39, .94); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 920px; }
th, td { padding: 15px 18px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-size: .76rem; letter-spacing: .06em; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
.site-link { display: block; color: var(--text); font-weight: 720; text-decoration: none; }
td small { display: block; color: var(--muted); }
.status { display: inline-flex; padding: 5px 9px; border-radius: 999px; font-size: .8rem; font-weight: 750; }
.status-connected { background: rgba(52, 211, 153, .13); color: var(--good); }
.status-offline { background: rgba(251, 113, 133, .13); color: var(--bad); }
.status-pending { background: rgba(251, 191, 36, .13); color: var(--warn); }
.updates-count { display: inline-grid; min-width: 30px; height: 30px; place-items: center; border-radius: 8px; background: var(--surface-2); }
.empty-state { padding: 64px 24px; text-align: center; }
.empty-state p { color: var(--muted); }
.auth-shell { min-height: calc(100vh - 165px); display: grid; place-items: center; }
.auth-card { width: min(460px, 100%); padding: 32px; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); box-shadow: 0 28px 70px rgba(0,0,0,.28); }
.form-stack { display: grid; gap: 18px; margin-top: 28px; }
label > span, legend { display: block; margin-bottom: 7px; color: #cbd5e1; font-size: .9rem; font-weight: 680; }
input[type="text"], input[type="email"], input[type="password"], input[type="url"] { width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; outline: 0; background: #0b1320; color: var(--text); font: inherit; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56, 189, 248, .12); }
.check-row { display: flex; align-items: center; gap: 9px; }
.check-row span { margin: 0; color: var(--muted); font-weight: 500; }
.error-box, .notice { padding: 12px 14px; border-radius: 9px; }
.error-box { background: rgba(251, 113, 133, .12); color: #fecdd3; }
.notice { margin-bottom: 20px; background: rgba(52, 211, 153, .12); color: #a7f3d0; }
.form-card { width: min(800px, 100%); padding: 28px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.full-width { grid-column: 1 / -1; }
fieldset { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 0; border: 0; }
.radio-card { display: flex; gap: 12px; padding: 15px; border: 1px solid var(--line); border-radius: 10px; background: #0b1320; }
.radio-card input { margin-top: 4px; }
.radio-card span, .radio-card small { margin: 0; }
.radio-card small { margin-top: 2px; }
.field-error { margin-top: 5px; color: #fecdd3; }
.actions { margin-top: 4px; }
.pairing-card { margin-bottom: 18px; padding: 26px; border-color: rgba(56, 189, 248, .55); }
.pairing-code { display: block; overflow-wrap: anywhere; margin-top: 18px; padding: 15px; border-radius: 9px; background: #060b12; color: #bae6fd; font-size: 1.05rem; }
.detail-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.detail-item { padding: 20px; }
.detail-item span { display: block; color: var(--muted); font-size: .82rem; }
.detail-item strong { display: block; margin-top: 4px; }

@media (max-width: 850px) {
    .summary-grid, .detail-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .form-grid, fieldset { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
    .container { padding-top: 30px; }
    .topnav > span { display: none; }
    .page-heading { align-items: stretch; flex-direction: column; }
    .summary-grid { grid-template-columns: 1fr 1fr; }
    .auth-card, .form-card { padding: 22px; }
}