/* TechLink Tools — Dark Tech-Noir
   Tokens copied from techlink.at src/tokens.css (keep in sync manually). */

:root {
  --bg: #06070b;
  --bg-elev: #0b0d14;
  --ink: #e9ebf2;
  --ink-dim: #9aa1b5;
  --ink-faint: #848da6;
  --line: rgba(233, 235, 242, 0.08);

  --robotics: #3ee0ff;
  --ai: #9d7bff;
  --energy: #ffb43a;

  --font-display: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;

  --space-unit: clamp(16px, 2.2vw, 28px);
  --radius: 2px;
}

::selection {
  background: var(--robotics);
  color: var(--bg);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scrollbar-color: rgba(233, 235, 242, 0.2) var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Star field — pure CSS dot pattern, no canvas */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    radial-gradient(circle, rgba(233, 235, 242, 0.11) 1px, transparent 1.4px),
    radial-gradient(circle, rgba(233, 235, 242, 0.06) 1px, transparent 1.4px);
  background-size: 270px 270px, 190px 190px;
  background-position: 40px 60px, 130px 10px;
}

/* Grain overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  color: var(--ink);
  text-decoration: none;
}

a:hover { color: var(--robotics); }

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

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(6, 7, 11, 0.85);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--ink);
  white-space: nowrap;
}

.wordmark:hover { color: var(--ink); }

.wordmark .node {
  display: inline-block;
  width: 0.32em;
  height: 0.32em;
  margin-left: 0.18em;
  transform: translateY(-0.55em);
  background: var(--robotics);
  box-shadow: 0 0 10px rgba(62, 224, 255, 0.8);
}

.header-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 3px 8px 3px 11px;
  transform: translateY(1px);
}

.site-nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  padding: 4px 0;
}

.site-nav a:hover { color: var(--ink); }

.site-nav a[aria-current="page"] {
  color: var(--robotics);
}

/* ---------- Kicker / headings ---------- */

.kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 14px;
}

.kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  flex: none;
  background: var(--accent, var(--robotics));
}

h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.lede {
  color: var(--ink-dim);
  max-width: 62ch;
  margin: 0;
}

main { padding-bottom: calc(var(--space-unit) * 2); }

.page-head { padding-top: calc(var(--space-unit) * 1.6); }

/* ---------- Cards (hub) ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: calc(var(--space-unit) * 1.4);
}

.card {
  --accent: var(--robotics);
  display: block;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-top: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px 20px 20px;
  transition: border-color 160ms ease, transform 160ms ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--ink);
}

.card--ai { --accent: var(--ai); }
.card--energy { --accent: var(--energy); }

.card .card-id {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.28em;
  color: var(--accent);
}

.card h2 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 10px 0 8px;
}

.card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-dim);
}

/* ---------- Tool panel ---------- */

.tool {
  --accent: var(--robotics);
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-top: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: clamp(18px, 3vw, 28px);
  margin-top: calc(var(--space-unit) * 1.2);
}

.tool--ai { --accent: var(--ai); }
.tool--energy { --accent: var(--energy); }

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 8px;
}

textarea,
input[type="text"] {
  width: 100%;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.55;
  padding: 12px;
}

textarea {
  min-height: 180px;
  resize: vertical;
}

textarea:focus,
input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

input[type="range"],
input[type="checkbox"],
input[type="radio"],
input[type="file"] {
  accent-color: var(--robotics);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
}

.btn {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 16px;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.btn:hover {
  border-color: var(--ink-dim);
}

.btn--primary {
  border-color: var(--accent, var(--robotics));
  color: var(--accent, var(--robotics));
}

.btn--primary:hover {
  background: var(--accent, var(--robotics));
  color: var(--bg);
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  cursor: pointer;
}

.check input { margin: 0; }

.output {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  padding: 14px;
  min-height: 52px;
  margin: 0;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.status {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  margin: 12px 0 0;
  min-height: 1.4em;
  color: var(--ink-faint);
}

.status.ok { color: var(--robotics); }
.status.err { color: var(--energy); }

.error-line {
  display: none;
  background: rgba(255, 180, 58, 0.06);
  border: 1px solid rgba(255, 180, 58, 0.25);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  padding: 10px 12px;
  margin: 10px 0 0;
  overflow-x: auto;
  white-space: pre;
}

.error-line.show { display: block; }

/* Password specifics */

.pw-output {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.pw-output .output {
  flex: 1;
  font-size: clamp(15px, 2.6vw, 19px);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 6px 0 16px;
}

.range-row input[type="range"] { flex: 1; }

.range-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--robotics);
  min-width: 2.4em;
  text-align: right;
}

.meter {
  height: 4px;
  background: var(--line);
  border-radius: var(--radius);
  margin: 14px 0 6px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0;
  background: var(--robotics);
  transition: width 200ms ease, background 200ms ease;
}

/* Hash result rows */

.hash-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding: 12px 0;
}

.hash-row:first-child { border-top: 0; }

.hash-algo {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  min-width: 74px;
  padding-top: 3px;
}

.hash-value {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-dim);
  overflow-wrap: anywhere;
  margin: 0;
}

.hash-row .btn { padding: 6px 10px; font-size: 10px; }

.tabs {
  display: flex;
  gap: 18px;
  margin-bottom: 16px;
}

/* ---------- Cross-link / notes ---------- */

.cross-link {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-faint);
  margin: 18px 0 0;
}

.cross-link a {
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line);
}

.cross-link a:hover { color: var(--robotics); border-bottom-color: var(--robotics); }

.tool-copy {
  margin-top: calc(var(--space-unit) * 1.2);
  color: var(--ink-dim);
  font-size: 15px;
  max-width: 68ch;
}

.tool-copy h2 {
  font-size: 17px;
  color: var(--ink);
  margin: 0 0 8px;
}

.tool-copy p { margin: 0 0 10px; }

/* ---------- Ad slots ---------- */

.ad-slot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 90px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  margin: calc(var(--space-unit) * 1.2) 0;
}

.ad-slot::before {
  content: "ADVERTISEMENT";
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.34em;
  color: var(--ink-faint);
  opacity: 0.6;
}

.ad-slot--content { min-height: 250px; }

.ad-slot .adsbygoogle { width: 100%; }

/* Once a real ad unit is inside, hide the placeholder label and frame */
.ad-slot:has(.adsbygoogle) { border-color: transparent; }
.ad-slot:has(.adsbygoogle)::before { display: none; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: calc(var(--space-unit) * 1.5);
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  padding-top: 22px;
  padding-bottom: 30px;
}

.site-footer a,
.site-footer span {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}

.site-footer a:hover { color: var(--robotics); }

.site-footer .footer-note {
  margin-left: auto;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

/* ---------- Responsive ---------- */

@media (max-width: 560px) {
  .site-nav { margin-left: 0; width: 100%; }
  .site-footer .footer-note { margin-left: 0; width: 100%; }
  .pw-output { flex-direction: column; }
  .hash-row { flex-wrap: wrap; }
  .hash-value { flex-basis: 100%; order: 3; }
}

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