:root {
  --bg: #0d0f11;
  --bg-raise: #14171a;
  --bg-input: #101316;
  --line: #23282d;
  --line-strong: #303740;
  --fg: #e6e9ec;
  --fg-dim: #9aa4ad;
  --fg-faint: #6b757e;
  --accent: oklch(0.78 0.09 200);
  --accent-dim: oklch(0.62 0.07 200);
  --ok: oklch(0.78 0.11 150);
  --bad: oklch(0.72 0.13 25);
  --radius: 6px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--fg); }

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

.wrap {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- header ---------- */

.site-head {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(13, 15, 17, 0.9);
  backdrop-filter: blur(8px);
  z-index: 5;
}

.head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--fg);
}
.brand:hover { color: var(--fg); }
.brand svg { display: block; }

.nav {
  display: flex;
  gap: 22px;
  font-size: 13.5px;
}
.nav a { color: var(--fg-dim); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--fg); }

/* ---------- hero ---------- */

.hero { padding-block: 96px 64px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 22px;
}

h1 {
  margin: 0;
  font-size: clamp(38px, 7vw, 60px);
  line-height: 1.04;
  letter-spacing: -0.028em;
  font-weight: 500;
}

.lede {
  margin: 20px 0 0;
  font-size: 18px;
  color: var(--fg-dim);
  max-width: 46ch;
  text-wrap: pretty;
}

.lede-sub {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--fg-faint);
  max-width: 46ch;
}

.rule { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- tool cards ---------- */

.section { padding-block: 56px; }

.section-label h2 {
  font: inherit;
  letter-spacing: inherit;
  margin: 0;
}

.section-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 26px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raise);
  padding: 22px 20px 20px;
  height: 100%;
  color: var(--fg);
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--line-strong);
  background: #171b1f;
  transform: translateY(-2px);
  color: var(--fg);
}

.card-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent-dim);
  letter-spacing: 0.1em;
}

.card h3 {
  margin: 14px 0 8px;
  font-size: 16.5px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--fg-dim);
  text-wrap: pretty;
}

.card-go {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-faint);
}
.card:hover .card-go { color: var(--accent); }

/* ---------- notes / prose ---------- */

.note {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  padding-block: 44px 72px;
}
.note h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.note p {
  margin: 0;
  color: var(--fg-dim);
  max-width: 58ch;
  text-wrap: pretty;
}

.prose { padding-block: 72px 88px; max-width: 62ch; }
.prose h1 { font-size: clamp(30px, 5vw, 40px); }
.prose h2 {
  margin: 44px 0 10px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.prose p { color: var(--fg-dim); text-wrap: pretty; }
.prose ul { color: var(--fg-dim); padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.prose .meta {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-faint);
  letter-spacing: 0.06em;
}

/* ---------- tool pages ---------- */

.tool-head { padding-block: 64px 32px; }
.tool-head h1 { font-size: clamp(30px, 5vw, 42px); }
.tool-head p {
  margin: 16px 0 0;
  color: var(--fg-dim);
  max-width: 52ch;
}

.tool { padding-block: 32px 24px; }

.panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.pane { min-width: 0; }

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 10px;
  min-height: 20px;
}

select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  padding: 13px 14px;
  appearance: none;
}
select:focus { border-color: var(--line-strong); }

textarea, input[type="text"], input[type="number"], input[type="datetime-local"] {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
  padding: 14px 15px;
  resize: vertical;
}
textarea { min-height: 340px; display: block; }
textarea:focus, input:focus { border-color: var(--line-strong); }
textarea::placeholder { color: var(--fg-faint); }
textarea[readonly] { color: var(--fg-dim); background: #0f1215; }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  align-items: center;
}

button {
  font-family: var(--font);
  font-size: 13.5px;
  color: var(--fg);
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 15px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
button:hover { border-color: var(--line-strong); background: #191d21; }
button.primary {
  background: transparent;
  border-color: var(--accent-dim);
  color: var(--accent);
}
button.primary:hover { background: rgba(96, 175, 200, 0.09); }
button.ghost { background: transparent; border-color: transparent; color: var(--fg-faint); }
button.ghost:hover { color: var(--fg); background: transparent; }

.status {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-faint);
  min-height: 18px;
  margin-left: 4px;
}
.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }

.privacy-line {
  font-size: 13px;
  color: var(--fg-faint);
  padding: 26px 0 0;
  border-top: 1px solid var(--line);
  margin-top: 40px;
}

/* timestamp page */

.stack { display: grid; gap: 14px; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 10px;
}

.results {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-raise);
  padding: 4px 18px;
  margin: 0;
}
.results div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.results div:last-child { border-bottom: 0; }
.results dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.results dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  overflow-wrap: anywhere;
}

.hint { font-size: 13px; color: var(--fg-faint); margin: 12px 0 0; }

noscript { display: block; }
.noscript-note {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 12px 15px;
  color: var(--fg-dim);
  font-size: 13.5px;
  margin-bottom: 20px;
}

/* ---------- 404 ---------- */

.center-page {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: 64px;
}
.big-code {
  font-family: var(--mono);
  font-size: clamp(56px, 14vw, 104px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--line-strong);
  margin: 0 0 18px;
}
.linkbtn {
  display: inline-block;
  margin-top: 28px;
  border: 1px solid var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius);
  padding: 9px 17px;
  font-size: 13.5px;
}
.linkbtn:hover { background: rgba(96, 175, 200, 0.09); color: var(--accent); }

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--line);
  margin-top: auto;
}
.foot-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-block: 26px;
  font-size: 13px;
  color: var(--fg-faint);
}
.foot-row nav { display: flex; gap: 18px; }
.foot-row a { color: var(--fg-faint); }
.foot-row a:hover { color: var(--fg); }

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr; }
  .panes { grid-template-columns: 1fr; }
  .note { grid-template-columns: 1fr; gap: 12px; }
  .hero { padding-block: 64px 48px; }
  textarea { min-height: 220px; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 18px; }
  .nav { gap: 16px; font-size: 13px; }
  .results div { grid-template-columns: 1fr; gap: 4px; }
  .controls button { flex: 1 1 auto; }
  .tool-head { padding-block: 44px 24px; }
}