:root {
  --bg: #f4f9fd;
  --surface: #ffffff;
  --surface-2: #e9f1f7;
  --text: #0c2a40;
  --muted: #4a5d70;
  --border: #c5d9e8;
  --primary: #0369a1;
  --primary-hover: #025583;
  --on-primary: #ffffff;
  --accent: #15803d;
  --accent-bg: #dcfce7;
  --danger: #b91c1c;
  --danger-bg: #fee2e2;
  --warn: #92400e;
  --warn-bg: #fef3c7;
  --info-bg: #e0f2fe;
  --ring: #0369a1;
  --shadow: 0 1px 2px rgba(12, 42, 64, .06), 0 8px 24px rgba(12, 42, 64, .06);
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #08121c;
    --surface: #0f1d2b;
    --surface-2: #162a3c;
    --text: #e6f0f8;
    --muted: #9db3c6;
    --border: #25405a;
    --primary: #38bdf8;
    --primary-hover: #7dd3fc;
    --on-primary: #04202f;
    --accent: #4ade80;
    --accent-bg: #0f3a22;
    --danger: #fca5a5;
    --danger-bg: #44171a;
    --warn: #fcd34d;
    --warn-bg: #3d2d0a;
    --info-bg: #0c3047;
    --ring: #7dd3fc;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 var(--font);
  overflow-wrap: anywhere;
}
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 6vw, 3.25rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
a { color: var(--primary); }
a:hover { color: var(--primary-hover); }
:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: 8px; top: -60px; background: var(--primary); color: var(--on-primary); padding: 10px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { top: 8px; }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.mono { font-family: var(--mono); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.15rem; color: var(--text); text-decoration: none; }
.brand svg { width: 26px; height: 26px; color: var(--primary); }
.nav { display: flex; align-items: center; gap: 4px 16px; flex-wrap: wrap; }
.nav a:not(.btn) { color: var(--muted); text-decoration: none; padding: 10px 4px; font-size: .95rem; }
.nav a:not(.btn):hover { color: var(--text); }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px;
  border-radius: 10px; border: 1px solid transparent; background: var(--primary); color: var(--on-primary);
  font: 600 .95rem var(--font); text-decoration: none; cursor: pointer;
  transition: background-color .15s, border-color .15s, transform .1s;
}
.btn:hover { background: var(--primary-hover); color: var(--on-primary); }
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn.secondary { background: transparent; color: var(--primary); border-color: var(--border); }
.btn.secondary:hover { background: var(--surface-2); color: var(--primary-hover); }
.btn.small { min-height: 36px; padding: 0 12px; font-size: .85rem; }

/* hero */
.hero { padding: 56px 0 48px; background: radial-gradient(900px 400px at 80% -10%, var(--info-bg), transparent 70%); }
.hero .grid { display: grid; gap: 32px; align-items: center; }
.hero p.lead { font-size: 1.15rem; color: var(--muted); max-width: 40em; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); background: var(--accent-bg); padding: 4px 10px; border-radius: 999px; margin-bottom: 16px; }
.hero-card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; box-shadow: var(--shadow); }
.score-row { display: flex; align-items: center; gap: 16px; }
.score { font-size: 2.5rem; font-weight: 800; line-height: 1; color: var(--accent); }
.hero-card ul { margin: 12px 0 0; padding-left: 1.2em; }

section.block { padding: 56px 0; }
section.block.alt { background: var(--surface); border-block: 1px solid var(--border); }
.section-head { max-width: 40em; margin-bottom: 28px; }
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); list-style: none; padding: 0; margin: 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
section.alt .card { background: var(--bg); }
.card h3 { display: flex; align-items: center; gap: 10px; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.icon { width: 22px; height: 22px; flex: none; color: var(--primary); }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-weight: 700; flex: none; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
thead th { background: var(--surface-2); font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
tbody th { font-weight: 600; }

.site-footer { padding: 32px 0 48px; color: var(--muted); font-size: .9rem; border-top: 1px solid var(--border); }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

@media (min-width: 860px) {
  .hero { padding: 88px 0 72px; }
  .hero .grid { grid-template-columns: 1.15fr .85fr; }
}

/* app */
.app-main { padding: 24px 0 64px; }
.auth-box { max-width: 460px; margin: 24px auto; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.panel + .panel { margin-top: 16px; }
.layout { display: grid; gap: 16px; align-items: start; }
@media (min-width: 900px) { .layout { grid-template-columns: 380px 1fr; } }
.tabs { display: flex; gap: 4px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab { flex: 1; min-height: 44px; background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted); font: 600 .95rem var(--font); cursor: pointer; }
.tab[aria-selected="true"] { color: var(--primary); border-bottom-color: var(--primary); }

form .field { margin-bottom: 14px; }
label, .label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
input, select, textarea {
  width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); font: inherit;
}
textarea { min-height: 88px; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--ring); outline-offset: 1px; }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 4px 12px; }
.checks label { display: flex; align-items: center; gap: 8px; min-height: 44px; font-weight: 400; margin: 0; }
.checks input { width: 20px; min-height: 20px; height: 20px; flex: none; }
.hint { font-size: .8rem; color: var(--muted); margin-top: 4px; }
.row { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
@media (max-width: 420px) { .row { grid-template-columns: 1fr; } }
.msg { padding: 10px 12px; border-radius: 8px; font-size: .9rem; margin: 12px 0; }
.msg.error { background: var(--danger-bg); color: var(--danger); }
.msg.ok { background: var(--accent-bg); color: var(--accent); }
.quote { background: var(--info-bg); border-radius: 8px; padding: 12px; margin-bottom: 14px; min-height: 48px; font-size: .95rem; }
.quote strong { font-size: 1.25rem; }
.quote.error { background: var(--danger-bg); color: var(--danger); }

.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.toolbar h2, .toolbar h3 { margin: 0; }
.list { list-style: none; margin: 0; padding: 0; }
.list li + li { margin-top: 8px; }
.item {
  display: block; width: 100%; text-align: left; background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px; color: var(--text); font: inherit; cursor: pointer; min-height: 44px;
}
.item:hover { border-color: var(--primary); }
.item[aria-current="true"] { border-color: var(--primary); box-shadow: inset 3px 0 0 var(--primary); }
.item .top { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 4px; }
.item .url { font-size: .85rem; color: var(--muted); display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.chip { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
.chip.verifying { background: var(--warn-bg); color: var(--warn); }
.chip.active { background: var(--info-bg); color: var(--primary); }
.chip.changed { background: var(--warn-bg); color: var(--warn); }
.chip.done { background: var(--accent-bg); color: var(--accent); }
.chip.failed { background: var(--danger-bg); color: var(--danger); }

dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0 0 16px; font-size: .9rem; }
dl.meta dt { color: var(--muted); }
dl.meta dd { margin: 0; }
.review { border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-top: 12px; background: var(--bg); }
.review header { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.review h4 { margin: 12px 0 4px; font-size: .9rem; }
.review ul { margin: 0; padding-left: 1.2em; }
.review .score { font-size: 1.75rem; }
.text-block { white-space: pre-wrap; }
.stars { display: inline-flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.star { min-width: 44px; min-height: 44px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: 600 1rem var(--font); cursor: pointer; }
.star:hover { border-color: var(--primary); }
.keybox { font-family: var(--mono); background: var(--surface-2); padding: 12px; border-radius: 8px; word-break: break-all; margin: 8px 0; user-select: all; }
.link-btn { background: none; border: 0; padding: 8px 0; color: var(--primary); font: inherit; font-size: .875rem; text-decoration: underline; cursor: pointer; min-height: 36px; }
.hidden { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

@media (max-width: 600px) { .site-header { position: static; } }
.wrap.narrow { max-width: 640px; }