:root {
  --bg: #060608;
  --panel: #0d0d12;
  --line: #1e1e28;
  --cyan: #00ffe0;
  --violet: #7b5cf5;
  --red: #ff4f6a;
  --text: #d7d7e0;
  --dim: #6b6b7c;
  --accent: var(--cyan);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 30px 20px 80px;
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
}

.wrap { max-width: 940px; margin: 0 auto; }

.eyebrow {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

h1 {
  font-family: 'Oswald', sans-serif;
  font-weight: 600;
  font-size: 30px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 4px;
  color: #fff;
}

.sub { color: var(--dim); margin-bottom: 22px; }

nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.navlink {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  background: transparent;
  color: var(--dim);
  border: 1px solid transparent;
  padding: 3px 8px;
  cursor: pointer;
}

.navlink:hover { color: var(--accent); border-color: var(--line); }

.calc {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 22px;
  margin-bottom: 16px;
  scroll-margin-top: 20px;
}

.calc h2 {
  font-family: 'Oswald', sans-serif;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 4px;
}

.blurb { color: var(--dim); margin: 0 0 18px; font-size: 12px; }

.inputs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.field.wide { grid-column: 1 / -1; }

label {
  display: block;
  color: var(--dim);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 5px;
}

input, select {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  background: #000;
  color: var(--text);
  border: 1px solid var(--line);
  padding: 8px 10px;
  width: 100%;
}

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

.hint { color: var(--dim); font-size: 10px; margin-top: 4px; }

.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 18px; }

.action {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: #000;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 9px 20px;
  cursor: pointer;
}

.action:hover { background: rgba(255, 255, 255, 0.06); }

.results { border-top: 1px solid var(--line); padding-top: 14px; }

.row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 5px 0;
  align-items: baseline;
}

.row .k { color: var(--dim); font-size: 12px; }

.row .v {
  font-family: 'Oswald', sans-serif;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--text);
}

.row.primary .v { font-size: 26px; color: var(--violet); }
.row.warn .v { color: var(--red); }

.row .n {
  grid-column: 1 / -1;
  color: var(--dim);
  font-size: 10px;
  margin-top: -3px;
}

.divider { height: 1px; background: var(--line); margin: 10px 0; }

.err { color: var(--red); font-size: 12px; }

.note {
  color: var(--dim);
  font-size: 11px;
  border-left: 2px solid var(--line);
  padding-left: 12px;
  margin-top: 26px;
}

.siblings {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 11px;
}

.siblings a { color: var(--dim); text-decoration: none; }
.siblings a:hover { color: var(--accent); }

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