:root {
  color-scheme: light;
  --bg: #f7f8f9;
  --surface: #ffffff;
  --fg: #15181c;
  --muted: #5c646e;
  --line: #dfe3e8;
  --accent: #2f5d8c;
  --crit: #b3261e;
  --warn: #8a5a00;
  --ok: #1f6b45;
  --noise: #78808a;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --radius-row: 2px;
  --radius-control: 4px;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #101316;
    --surface: #171b1f;
    --fg: #e6e9ec;
    --muted: #a0a8b1;
    --line: #272c32;
    --accent: #7fb0e0;
    --crit: #ff8a80;
    --warn: #e8b765;
    --ok: #6ec294;
    --noise: #8a929c;
  }
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #101316;
  --surface: #171b1f;
  --fg: #e6e9ec;
  --muted: #a0a8b1;
  --line: #272c32;
  --accent: #7fb0e0;
  --crit: #ff8a80;
  --warn: #e8b765;
  --ok: #6ec294;
  --noise: #8a929c;
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f8f9;
  --surface: #ffffff;
  --fg: #15181c;
  --muted: #5c646e;
  --line: #dfe3e8;
  --accent: #2f5d8c;
  --crit: #b3261e;
  --warn: #8a5a00;
  --ok: #1f6b45;
  --noise: #78808a;
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body { margin: 0; min-width: 0; background: var(--bg); }

a { color: var(--accent); text-underline-offset: 3px; }

button, input { font: inherit; }

button, a { touch-action: manipulation; }

button:focus-visible, a:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.shell { width: min(880px, calc(100% - 32px)); margin-inline: auto; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--accent);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }

.header-inner {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.brand {
  color: var(--fg);
  font: 600 18px/1 var(--font-mono);
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-large { font-size: 24px; }

.main-nav { display: flex; align-items: center; gap: var(--space-3); font-size: 14px; }
.main-nav form { margin: 0; }
.main-nav a { color: var(--muted); text-decoration: none; }

.text-button {
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.main-nav a, .text-button, .button {
  transition: background-color 120ms ease-out, border-color 120ms ease-out, color 120ms ease-out;
}

main.shell { padding-block: var(--space-6) var(--space-7); }

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: var(--space-2); font-size: clamp(30px, 6vw, 44px); line-height: 1.05; letter-spacing: -0.035em; text-wrap: balance; }
h2 { margin-bottom: var(--space-2); font-size: 21px; line-height: 1.2; letter-spacing: -0.02em; }

.lead { max-width: 610px; margin-bottom: 0; color: var(--muted); font-size: 17px; line-height: 1.55; }
.section-label { margin-bottom: var(--space-2); color: var(--muted); font: 500 12px/1.2 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.page-header { display: flex; align-items: end; justify-content: space-between; gap: var(--space-5); margin-bottom: var(--space-6); }
.compact-header { max-width: 680px; }

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}

.button-primary { border-color: var(--accent); background: var(--accent); color: var(--surface); }
.button-secondary, .button-copy { background: var(--surface); color: var(--fg); }
.button-copy { min-height: 36px; margin-left: var(--space-2); padding: 6px 10px; font-size: 13px; }

@media (hover: hover) and (pointer: fine) {
  .button:hover, .filter-button:hover, .sort-button:hover, .finding-toggle:hover, .noise-toggle:hover { border-color: var(--accent); }
}

.auth-shell { min-height: 100vh; display: grid; align-items: center; }
.auth-panel { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 400px); border: 1px solid var(--line); background: var(--surface); }
.auth-proof { min-height: 470px; display: flex; flex-direction: column; padding: var(--space-5); background: var(--bg); border-right: 1px solid var(--line); }
.proof-number { margin: auto 0 4px; font: 600 clamp(44px, 8vw, 72px)/1 var(--font-mono); letter-spacing: -0.05em; color: var(--accent); }
.proof-copy { max-width: 360px; color: var(--fg); font-size: 18px; line-height: 1.45; }
.trust-line { margin: var(--space-6) 0 0; color: var(--muted); font-size: 13px; }
.auth-form-wrap { align-self: center; padding: var(--space-5); }

.stack-form { display: grid; gap: var(--space-4); margin-top: var(--space-5); }
.field { display: grid; gap: var(--space-2); }
.field label { font-weight: 600; }
.field-hint { order: 1; margin: 0; color: var(--muted); font-size: 13px; }
.field input { order: 2; width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-control); background: var(--surface); color: var(--fg); font-size: 16px; }
.field input:focus { border-color: var(--accent); }
.field-error { order: 3; margin: 0; color: var(--crit); font-size: 14px; }

.domain-list { border-top: 1px solid var(--line); }
.domain-row { display: grid; grid-template-columns: 1.2fr 2fr auto; gap: var(--space-4); align-items: center; padding: var(--space-4) 0; border-bottom: 1px solid var(--line); }
.domain-row h2 { margin-bottom: var(--space-2); overflow-wrap: anywhere; }
.status-line { display: flex; align-items: center; gap: var(--space-2); margin: 0; color: var(--muted); font-size: 13px; }
.status-mark { width: 8px; height: 8px; border: 1px solid currentColor; background: transparent; }
.status-verified { color: var(--ok); }
.status-pending, .status-revoked { color: var(--warn); }
.domain-meta { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); margin: 0; }
.domain-meta div { min-width: 0; }
.domain-meta dt { color: var(--muted); font-size: 12px; }
.domain-meta dd { margin: var(--space-1) 0 0; font-size: 14px; }
.domain-actions { display: grid; gap: var(--space-2); }
.domain-actions form { margin: 0; }
.domain-actions .button { width: 100%; }

.empty-state { max-width: 590px; padding: var(--space-5) 0; border-block: 1px solid var(--line); }
.empty-state p:not(.section-label) { color: var(--muted); line-height: 1.55; }

.form-section { max-width: 560px; padding-bottom: var(--space-6); }
.target-form { margin-top: 0; }
.dns-instruction { padding-top: var(--space-5); border-top: 1px solid var(--line); }
.steps { max-width: 680px; margin: var(--space-4) 0; padding-left: 24px; color: var(--muted); line-height: 1.6; }
.steps li + li { margin-top: var(--space-2); }
.dns-values { margin: var(--space-4) 0; border-top: 1px solid var(--line); }
.dns-values > div { display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: var(--space-3); padding: var(--space-3) 0; border-bottom: 1px solid var(--line); }
.dns-values dt { color: var(--muted); }
.dns-values dd { min-width: 0; margin: 0; }
.dns-values code { font-family: var(--font-mono); overflow-wrap: anywhere; }

@media (max-width: 720px) {
  main.shell { padding-block: var(--space-5); }
  .header-inner, .page-header { align-items: flex-start; }
  .header-inner { padding-block: var(--space-2); }
  .main-nav { flex-wrap: wrap; justify-content: flex-end; gap: var(--space-2) var(--space-3); }
  .page-header { flex-direction: column; }
  .auth-panel { grid-template-columns: 1fr; }
  .auth-proof { display: none; }
  .auth-form-wrap { padding: var(--space-4); }
  .domain-row { grid-template-columns: 1fr; }
  .domain-meta { grid-template-columns: repeat(2, 1fr); }
  .domain-actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 420px) {
  .shell { width: min(100% - 32px, 880px); }
  .site-header .brand { width: 100%; }
  .header-inner { flex-wrap: wrap; }
  .main-nav { justify-content: flex-start; }
  .domain-actions { grid-template-columns: 1fr; }
  .dns-values > div { grid-template-columns: 1fr; }
  .button-copy { margin: var(--space-2) 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}