:root {
  --bg: #f4f2ed;
  --card: #ffffff;
  --text: #1c2326;
  --muted: #5d6a6d;
  --line: #d9d5cc;
  --accent: #0f6f66;
  --accent-text: #ffffff;
  --ok: #18794e;
  --ok-bg: #e5f4ec;
  --fail: #b4232a;
  --fail-bg: #fbe9e9;
  --code: #eef0ee;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0d1416;
    --card: #152024;
    --text: #e8ece9;
    --muted: #9aaba7;
    --line: #2a3a3d;
    --accent: #4bd9c1;
    --accent-text: #08191e;
    --ok: #6ee0a8;
    --ok-bg: #12301f;
    --fail: #ff8f86;
    --fail-bg: #3a1716;
    --code: #0b1315;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

.head h1 {
  margin: 4px 0 8px;
  font-size: 34px;
  line-height: 1.15;
}

.eyebrow {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.lead {
  margin: 0 0 24px;
  color: var(--muted);
}

.card {
  margin: 0 0 16px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

.card.quiet {
  background: transparent;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 19px;
}

.hint {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--muted);
}

.file {
  position: relative;
  display: inline-flex;
  margin: 0 0 14px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.file input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.file:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.field {
  display: block;
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 600;
}

textarea,
input[type='url'] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--code);
  color: var(--text);
  font: 13px/1.5 ui-monospace, Consolas, monospace;
}

textarea {
  resize: vertical;
}

textarea:focus,
input[type='url']:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.advanced {
  margin: 12px 0 0;
  font-size: 14px;
}

.advanced summary {
  margin: 0 0 8px;
  cursor: pointer;
  color: var(--muted);
}

.primary {
  margin: 16px 0 0;
  padding: 11px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.primary:disabled {
  opacity: 0.6;
  cursor: default;
}

.primary:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.error {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--fail-bg);
  color: var(--fail);
  font-size: 14px;
}

.verdict {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 8px;
  font-weight: 700;
}

.verdict.is-ok {
  background: var(--ok-bg);
  color: var(--ok);
}

.verdict.is-failed {
  background: var(--fail-bg);
  color: var(--fail);
}

.summary {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 16px;
  margin: 0 0 18px;
  font-size: 14px;
}

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

.summary dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.checks {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.checks li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 8px;
  padding: 7px 0;
  border-top: 1px solid var(--line);
}

.checks .mark {
  font-weight: 700;
}

.checks .is-ok .mark {
  color: var(--ok);
}

.checks .is-failed .mark {
  color: var(--fail);
}

.checks .detail {
  display: block;
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.how {
  margin: 0 0 12px;
  padding-left: 20px;
  font-size: 14px;
}

.how li {
  margin: 0 0 6px;
}

[hidden] {
  display: none !important;
}

@media (max-width: 520px) {
  .head h1 {
    font-size: 28px;
  }

  .card {
    padding: 18px 16px;
  }

  .summary {
    grid-template-columns: 1fr;
    gap: 0 0;
  }

  .summary dd {
    margin: 0 0 8px;
  }
}