/* subnet-calculator.css, re-themed for the hacker site. Scoped to .tool-main. */
.tool-main {
  --bg: #0B110E;
  --surface: #0F1813;
  --surface-2: #0D1511;
  --line: #1F2D25;
  --text: #CDEFD9;
  --strong: #EAFBF0;
  --muted: #7FA08C;
  --accent: #5CFF9D;
  --accent-soft: rgba(92, 255, 157, 0.1);
  --on-accent: #0B110E;
  --net: #6CC4FF;
  --host: #FFB547;
  --error: #FF8A8A;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Mono', ui-monospace, monospace;
  --display: 'Space Mono', ui-monospace, monospace;
  --radius: 8px;
  flex-grow: 1;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px 96px;
  box-sizing: border-box;
}

.tool-main .eyebrow {
  margin: 48px 0 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
}

.tool-main h1, .tool-main h2 {
  font-family: var(--display);
}

.tool-main h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.1;
  letter-spacing: -1px;
}

.tool-main .lede {
  margin: 0 0 32px;
  max-width: 640px;
  color: var(--muted);
}

.tool-main .card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.tool-main form.card {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) auto;
  gap: 16px;
  align-items: end;
}

.tool-main label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
}

.tool-main input, .tool-main select, .tool-main button {
  font: inherit;
  min-height: 48px;
  border-radius: 10px;
}

.tool-main input, .tool-main select {
  width: 100%;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
}

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

.tool-main input[aria-invalid='true'] {
  border-color: var(--error);
}

.tool-main button {
  padding: 0 24px;
  border: none;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  cursor: pointer;
}

.tool-main .examples {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.tool-main .chip {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
}

.tool-main .chip:hover {
  border-color: var(--accent);
}

.tool-main .error {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--error);
  font-size: 0.9rem;
}

.tool-main .error:empty {
  display: none;
}

.tool-main section {
  margin-top: 32px;
}

.tool-main h2 {
  margin: 0 0 16px;
  font-size: 1.3rem;
}

.tool-main .results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.tool-main .stat {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  min-width: 0;
}

.tool-main .stat dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

.tool-main .stat dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.tool-main .stat.highlight {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.tool-main .badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tool-main .badge {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.tool-main .badge strong {
  color: var(--text);
  font-weight: 500;
}

.tool-main .binary {
  overflow-x: auto;
}

.tool-main .binary table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.9rem;
}

.tool-main .binary th {
  text-align: left;
  padding: 10px 16px 10px 0;
  font-family: var(--sans);
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
}

.tool-main .binary td {
  padding: 10px 0;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.tool-main .binary tr + tr {
  border-top: 1px solid var(--line);
}

.tool-main .bit-net {
  color: var(--net);
}

.tool-main .bit-host {
  color: var(--host);
}

.tool-main .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.tool-main .legend span::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 2px;
  vertical-align: middle;
}

.tool-main .legend .l-net::before {
  background: var(--net);
}

.tool-main .legend .l-host::before {
  background: var(--host);
}

.tool-main .split-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin-bottom: 16px;
}

.tool-main .split-controls label {
  width: 220px;
}

.tool-main .split-note {
  margin: 0 0 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.tool-main .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.tool-main .table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.tool-main .table-wrap th, .tool-main .table-wrap td {
  padding: 10px 14px;
  text-align: left;
  white-space: nowrap;
}

.tool-main .table-wrap th {
  position: sticky;
  top: 0;
  background: var(--surface-2);
  font-family: var(--sans);
  font-weight: 600;
  color: var(--muted);
}

.tool-main .table-wrap tbody tr {
  border-top: 1px solid var(--line);
}

.tool-main .table-wrap tbody tr:nth-child(even) {
  background: var(--surface-2);
}

.tool-main .about {
  margin: 48px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.tool-main [hidden] {
  display: none !important;
}

@media (max-width: 640px) {
  .tool-main form.card {
    grid-template-columns: 1fr;
  }

  .tool-main .split-controls label {
    width: 100%;
  }

  .tool-main .split-controls button {
    width: 100%;
  }
}

/* ----- Hacker theme overrides shared by the tool pages ----- */
.tool-main *, .tool-main *::before, .tool-main *::after { box-sizing: border-box; }
.tool-main :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tool-main .back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 32px;
  color: #9DBBA8;
}
.tool-main .eyebrow {
  margin: 8px 0 10px;
  font-size: 15px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--muted);
}
.tool-main .eyebrow span { color: var(--accent); }
.tool-main h1 {
  font-size: 44px;
  line-height: 1.05;
  color: var(--strong);
  text-shadow: 0 0 26px rgba(92, 255, 157, 0.28);
}
.tool-main h2 { color: var(--strong); font-size: 22px; }
.tool-main h2::before { content: '$ '; color: var(--accent); }
.tool-main .lede, .tool-main .section-lede, .tool-main .about { color: #9DBBA8; }
.tool-main .about a { color: var(--accent); }
.tool-main .chip { border-radius: 4px; }
.tool-main .chip:hover, .tool-main .try:hover { box-shadow: 0 0 14px rgba(92, 255, 157, 0.3); }
@media (max-width: 900px) {
  .tool-main { padding-left: 16px; padding-right: 16px; }
}
@media (max-width: 560px) {
  .tool-main h1 { font-size: 28px; letter-spacing: -0.5px; }
}
.tool-main .card { border-color: #2F4A3B; border-radius: 8px; background: rgba(10, 15, 12, 0.94); }
.tool-main input, .tool-main select { border-radius: 4px; background: #0A0F0C; color: var(--strong); caret-color: var(--accent); }
.tool-main button { border-radius: 4px; box-shadow: 0 0 24px rgba(92, 255, 157, 0.35); }
.tool-main .chip { box-shadow: none; color: var(--text); }
.tool-main .stat { border-radius: 6px; transition: transform .15s, box-shadow .15s; }
.tool-main .stat:hover { transform: translateY(-2px); box-shadow: 0 0 18px rgba(92, 255, 157, 0.25); }
.tool-main .stat dt { text-transform: none; letter-spacing: 0; color: var(--muted); }
.tool-main .stat dd { color: var(--strong); }
.tool-main .stat.highlight { border-color: var(--accent); }
.tool-main .badge { border-radius: 3px; }
.tool-main .table-wrap { border-radius: 6px; }
.tool-main .table-wrap th { color: var(--muted); font-weight: 500; }
@media (prefers-reduced-motion: reduce) {
  .tool-main .stat { transition: none; }
  .tool-main .stat:hover { transform: none; }
}