:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #15181d;
  --muted: #5a626e;
  --border: #d5d9e0;
  --accent: #1f4fd1;
  --accent-text: #ffffff;
  --focus: #1f4fd1;
  --danger-bg: #a8071a;
  --danger-text: #ffffff;
  --danger-border: #a8071a;
  --warn-bg: #fff4d6;
  --warn-text: #5c3b00;
  --success: #106b2e;
  --code-bg: #eef0f4;
  --hub-bg: #f0f1f4;
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --surface: #1d2026;
    --text: #eef0f3;
    --muted: #a3abb8;
    --border: #353a44;
    --accent: #7ea2ff;
    --accent-text: #0b1530;
    --focus: #9fb8ff;
    --danger-bg: #ff5c6c;
    --danger-text: #1a0004;
    --danger-border: #ff5c6c;
    --warn-bg: #3d2f00;
    --warn-text: #ffe08a;
    --success: #5fd38a;
    --code-bg: #262a32;
    --hub-bg: #181a1f;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem;
  padding-bottom: calc(1rem + env(safe-area-inset-bottom));
}

h1 {
  font-size: 1.5rem;
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

h1:focus {
  outline: none;
}

h2 {
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 1.25rem 0 0.4rem;
}

p {
  margin: 0.4rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.card.signed {
  border-width: 2px;
  border-color: var(--accent);
}

.card.hub {
  background: var(--hub-bg);
  border-style: dashed;
}

.card.error {
  border: 2px solid var(--danger-border);
}

.card.success h1 {
  color: var(--success);
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.875rem;
}

.mono,
code {
  font-family: var(--mono);
  font-size: 0.9rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 6px;
}

ul,
ol {
  margin: 0;
  padding-left: 1.25rem;
}

li {
  margin: 0.4rem 0;
}

.hosts li {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.75rem;
}

.steps > li {
  padding: 0.5rem 0;
}

.op {
  font-weight: 600;
}

dl {
  margin: 0.4rem 0 0;
  display: grid;
  grid-template-columns: minmax(0, max-content) minmax(0, 1fr);
  gap: 0.25rem 0.75rem;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  min-width: 0;
}

.params {
  background: var(--code-bg);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

.banner {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-weight: 700;
}

.banner.danger {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.banner.warn {
  background: var(--warn-bg);
  color: var(--warn-text);
}

.hash {
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

.tier {
  font-weight: 700;
  text-transform: uppercase;
}

.tier-high,
.tier-critical {
  color: var(--danger-border);
}

.reviews p {
  margin-top: 0.15rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

label {
  display: block;
  font-weight: 600;
  margin: 1rem 0 0.35rem;
}

input[type="text"] {
  width: 100%;
  min-height: 48px;
  font: inherit;
  padding: 0.5rem 0.75rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

button {
  display: block;
  width: 100%;
  min-height: 52px;
  margin-top: 1rem;
  font: inherit;
  font-weight: 700;
  font-size: 1.05rem;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: var(--accent-text);
}

button.primary.danger {
  background: var(--danger-bg);
  color: var(--danger-text);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.actions {
  position: sticky;
  bottom: 0;
  background: var(--bg);
  padding: 0.25rem 0 0.5rem;
}

.status {
  min-height: 1.5rem;
  font-weight: 600;
}

.loading {
  color: var(--muted);
  text-align: center;
  padding: 3rem 0;
}

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

.agent-evidence {
  border-left: 4px solid var(--danger-border);
  padding-left: 0.75rem;
  margin: 0.75rem 0;
}

.agent-evidence code {
  white-space: pre-wrap;
  word-break: break-word;
}

.keys {
  list-style: none;
  padding-left: 0;
}

.key-added,
.key-changed {
  border-left: 4px solid var(--danger-border);
  padding-left: 0.75rem;
}

.marker {
  display: inline-block;
  margin-right: 0.5rem;
  padding: 0 0.4rem;
  border-radius: 6px;
  background: var(--danger-bg);
  color: var(--danger-text);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
}

input.code-input {
  font-family: var(--mono);
  font-size: 1.25rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}