/* Color Tools — base.css (shared across all pages)
   Kinetic "Cursor Reactive" concept (8e):
   - dark-first, hue-reactive accent driven by --hue (set live by base.js)
   - oversized uppercase display type, mono labels, cursor glow
   - light theme = "kinetic light" (8a) counterpart */

:root {
  /* live cursor state (updated by base.js) */
  --hue: 340;
  --mx: 50vw;
  --my: 40vh;

  /* kinetic light (8a) */
  --bg: #f5f4f0;
  --surface: #ffffff;
  --text: #101013;
  --text-muted: #75757f;
  --border: #dddbd4;
  --accent: hsl(340 80% 44%);
  --accent-soft: hsl(340 80% 44% / .12);
  --accent-text: #ffffff;
  --live: hsl(var(--hue) 80% 44%);
  --glow: hsl(var(--hue) 90% 60% / .10);
  --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .05);
  --radius: 14px;
  --mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, monospace;
}

html[data-theme="dark"] {
  --bg: #0c0c10;
  --surface: #15151a;
  --text: #f5f4f0;
  --text-muted: #8f8f9b;
  --border: #26262e;
  --accent: hsl(340 88% 62%);
  --accent-soft: hsl(340 88% 62% / .14);
  --accent-text: #0c0c10;
  --live: hsl(var(--hue) 88% 62%);
  --glow: hsl(var(--hue) 90% 60% / .17);
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  transition: background .25s, color .25s;
  overflow-x: hidden;
}

/* cursor-reactive glow (painted under content; JS moves --mx/--my/--hue) */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(460px 460px at var(--mx) var(--my), var(--glow), transparent 70%);
}
body > * { position: relative; z-index: 1; }
@media (prefers-reduced-motion: reduce) { body::before { display: none; } }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--text-muted); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 12px; }
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 16px; letter-spacing: .01em;
  text-transform: uppercase;
  color: var(--text); text-decoration: none; white-space: nowrap;
}
.logo-dots { display: inline-flex; gap: 3px; }
.logo-dots i { width: 9px; height: 9px; border-radius: 3px; }
.logo-dots i:nth-child(1) { background: hsl(var(--hue) 88% 62%); }
.logo-dots i:nth-child(2) { background: hsl(calc(var(--hue) + 55) 88% 62%); }
.logo-dots i:nth-child(3) { background: hsl(calc(var(--hue) + 130) 80% 58%); }
.logo-dots i:nth-child(4) { background: hsl(calc(var(--hue) + 200) 85% 62%); }
.logo-dots i:nth-child(5) { background: hsl(calc(var(--hue) + 265) 85% 66%); }
.header-nav { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.header-nav a { color: var(--text-muted); text-decoration: none; font-size: 13.5px; font-weight: 500; }
.header-nav a:hover { color: var(--text); }
.header-nav a.active { color: var(--accent); font-weight: 700; }

/* Header "Tools" dropdown */
.nav-drop { position: relative; }
.nav-drop-btn {
  display: flex; align-items: center; gap: 4px;
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--text-muted); font-size: 13.5px; font-weight: 500; font-family: inherit;
}
.nav-drop-btn:hover, .nav-drop[data-open] .nav-drop-btn { color: var(--text); }
.nav-drop-btn .caret { transition: transform .15s ease; }
.nav-drop[data-open] .nav-drop-btn .caret { transform: rotate(180deg); }
.nav-drop-panel {
  position: absolute; top: calc(100% + 12px); right: -10px; min-width: 200px;
  display: none; flex-direction: column; gap: 2px; padding: 8px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, .16);
}
.nav-drop[data-open] .nav-drop-panel { display: flex; }
.nav-drop-panel a { padding: 7px 10px; border-radius: 8px; }
.nav-drop-panel a:hover { background: color-mix(in srgb, var(--text) 7%, transparent); }

/* Footer copyright */
.site-footer .footer-copy { margin-top: 6px; font-size: 12.5px; opacity: .7; }

.icon-btn {
  background: none; border: 1px solid var(--border); border-radius: 99px;
  width: 34px; height: 34px; cursor: pointer; color: var(--text); font-size: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.icon-btn:hover { border-color: var(--text); }
html[data-theme="light"] .theme-icon-light { display: none; }
html[data-theme="dark"] .theme-icon-dark { display: none; }

/* Hero — kinetic display type */
.hero { text-align: center; padding: 56px 0 30px; }
.hero .kicker { margin-bottom: 16px; }
.hero h1 {
  font-size: clamp(30px, 5.6vw, 54px);
  margin: 0 0 12px;
  letter-spacing: -0.035em;
  line-height: 1.0;
  font-weight: 800;
  text-transform: uppercase;
}
.hero p { color: var(--text-muted); max-width: 620px; margin: 0 auto; }

/* mono kicker (used above heroes / section labels) */
.kicker {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--text-muted);
}

/* Dropzone (palette + colorblind tools) */
.dropzone {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 56px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  margin-bottom: 40px;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent);
  outline: none;
}
.dropzone.dragover { background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.dz-icon {
  width: 52px; height: 52px; margin: 0 auto 14px;
  border-radius: 50%; background: var(--accent); color: var(--accent-text);
  font-size: 28px; line-height: 52px; font-weight: 400;
}
.dz-title { font-weight: 700; margin: 0 0 4px; }
.dz-sub { color: var(--text-muted); font-size: 14px; margin: 0; }

/* Controls */
.workspace { margin-bottom: 48px; }
.controls {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-end;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px; margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.control-group { display: flex; flex-direction: column; gap: 8px; }
.control-group.actions { flex-direction: row; align-items: center; margin-left: auto; flex-wrap: wrap; }
.control-label {
  font-family: var(--mono);
  font-size: 11px; font-weight: 500; text-transform: uppercase;
  letter-spacing: .14em; color: var(--text-muted);
}

.segmented { display: inline-flex; border: 1px solid var(--border); border-radius: 99px; overflow: hidden; }
.segmented button {
  background: var(--surface); color: var(--text-muted); border: none;
  padding: 7px 14px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.segmented button + button { border-left: 1px solid var(--border); }
.segmented button.active { background: var(--accent); color: var(--accent-text); }

input[type="range"] { accent-color: var(--accent); width: 140px; }
.checkbox {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; font-weight: 500; cursor: pointer; user-select: none;
  padding: 6px 0;
}
.checkbox input { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }

.btn {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: 99px;
  padding: 8px 16px; font-size: 14px; font-weight: 700; cursor: pointer;
  transition: border-color .15s, transform .15s, background .15s, color .15s;
  text-decoration: none; display: inline-block;
}
.btn:hover { border-color: var(--text); transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn-primary:hover { border-color: var(--accent); filter: brightness(1.06); }
.btn-ghost { background: none; border-color: transparent; color: var(--text-muted); }
.btn-ghost:hover { border-color: transparent; color: var(--text); transform: none; }
.btn-outline { background: none; border: 1.5px solid var(--accent); color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.active { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

.hint { text-align: center; color: var(--text-muted); font-size: 13px; margin-top: 12px; font-family: var(--mono); }

/* Hub tool cards (legacy grid, kept for compatibility) */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-bottom: 48px; }
.tool-card {
  display: block; text-decoration: none; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
  transition: transform .15s, border-color .15s;
}
.tool-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.tool-card .tc-icon { font-size: 26px; margin-bottom: 10px; }
.tool-card h3 { margin: 0 0 6px; font-size: 17px; }
.tool-card p { margin: 0; color: var(--text-muted); font-size: 14px; }
.tool-card .tc-strip { display: flex; height: 8px; border-radius: 4px; overflow: hidden; margin-bottom: 14px; }
.tool-card .tc-strip i { flex: 1; }

/* Section headings on hub / lists */
.section-head { margin: 8px 0 18px; }
.section-head h2 {
  margin: 0 0 4px; font-size: 20px;
  text-transform: uppercase; letter-spacing: -.01em; font-weight: 800;
}

/* Kinetic index list (hub + reusable) */
.k-list { margin: 20px 0 8px; border-top: 1px solid var(--border); }
.k-item {
  display: grid; grid-template-columns: 56px 1fr auto; gap: 20px; align-items: center;
  padding: 20px 6px; border-bottom: 1px solid var(--border);
  text-decoration: none; color: var(--text);
  transition: padding-left .2s;
}
.k-item .k-idx { font-family: var(--mono); font-size: 12px; color: var(--text-muted); }
.k-item h3 {
  margin: 0; font-size: clamp(19px, 2.8vw, 30px); font-weight: 800;
  text-transform: uppercase; letter-spacing: -.02em; transition: color .15s;
}
.k-item p { margin: 2px 0 0; font-size: 13px; color: var(--text-muted); }
.k-item .k-arr { color: var(--text-muted); transition: transform .2s, color .2s; }
.k-item:hover { padding-left: 16px; }
.k-item:hover h3 { color: var(--live); }
.k-item:hover .k-arr { transform: translateX(4px); color: var(--text); }

/* Marquee band */
.marquee {
  overflow: hidden; white-space: nowrap;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 13px 0; font-weight: 800; text-transform: uppercase;
  font-size: clamp(16px, 2.4vw, 26px);
}
.marquee > span { display: inline-block; animation: pp-mq 28s linear infinite; }
.marquee em { font-style: normal; margin: 0 20px; color: var(--live); }
@keyframes pp-mq { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee > span { animation: none; } }

/* Proof strip */
.proof {
  display: flex; gap: 40px; justify-content: center; flex-wrap: wrap;
  padding: 48px 0 0; font-family: var(--mono); font-size: 13px; color: var(--text-muted);
}
.proof b { color: var(--text); }

/* Article / prose pages */
.prose { max-width: 720px; margin: 0 auto; padding: 40px 0 64px; }
.prose h1 {
  font-size: clamp(26px, 4.4vw, 38px); letter-spacing: -0.03em; margin: 0 0 6px;
  font-weight: 800; text-transform: uppercase; line-height: 1.05;
}
.prose .meta { color: var(--text-muted); font-size: 13px; margin-bottom: 28px; font-family: var(--mono); }
.prose h2 { font-size: 21px; margin: 36px 0 10px; letter-spacing: -.01em; }
.prose h3 { font-size: 17px; margin: 26px 0 8px; }
.prose p, .prose li { font-size: 16px; line-height: 1.7; }
.prose a { color: var(--accent); }
.prose ul, .prose ol { padding-left: 22px; }
.prose blockquote { border-left: 3px solid var(--accent); margin: 18px 0; padding: 4px 18px; color: var(--text-muted); }
.prose code { background: var(--surface); border: 1px solid var(--border); border-radius: 5px; padding: 1px 6px; font-size: 14px; font-family: var(--mono); }
.prose .callout {
  background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 10px; padding: 14px 18px; margin: 22px 0;
}
.article-list { list-style: none; padding: 0; margin: 0 0 56px; }
.article-list li { border-bottom: 1px solid var(--border); }
.article-list a { display: block; padding: 16px 4px; text-decoration: none; color: var(--text); }
.article-list a:hover h3 { color: var(--accent); }
.article-list h3 { margin: 0 0 4px; font-size: 16px; }
.article-list p { margin: 0; color: var(--text-muted); font-size: 14px; }

/* Ad slots — reserved, activated post-deploy */
.ad-slot { min-height: 0; }

/* Toast */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg);
  padding: 10px 18px; border-radius: 99px; font-size: 14px; font-weight: 600;
  opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Explainer / SEO sections (tool pages) ---------- */
.explainer { padding: 40px 0 8px; }
.explainer + .explainer { padding-top: 28px; }
.x-head { max-width: 640px; margin: 0 0 24px; }
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: .2em;
  color: var(--accent); margin-bottom: 8px;
}
.x-head h2 {
  margin: 0 0 10px; font-size: clamp(20px, 3vw, 27px);
  letter-spacing: -0.02em; font-weight: 800; text-transform: uppercase;
}
.x-head p { margin: 0; color: var(--text-muted); line-height: 1.7; }

/* Feature cards */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.feature {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow);
  transition: border-color .15s;
}
.feature:hover { border-color: var(--accent); }
.feature .f-icon {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 12px;
}
.feature h3 { margin: 0 0 6px; font-size: 15px; }
.feature p { margin: 0; color: var(--text-muted); font-size: 14px; line-height: 1.6; }

/* Numbered steps */
.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; }
.steps li {
  counter-increment: step;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow); position: relative;
}
.steps li::before {
  content: "0" counter(step);
  display: block;
  font-family: var(--mono);
  font-size: 24px; font-weight: 700; letter-spacing: -0.02em;
  color: var(--accent); opacity: .95;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}
.steps h3 { margin: 0 0 6px; font-size: 15px; }
.steps p { margin: 0; color: var(--text-muted); font-size: 14px; line-height: 1.6; }

/* FAQ accordion */
.faq { display: grid; gap: 10px; max-width: 760px; }
.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 0 18px;
  transition: border-color .15s;
}
.faq details[open] { border-color: var(--accent); }
.faq summary {
  cursor: pointer; list-style: none;
  font-weight: 600; font-size: 15px;
  padding: 15px 0; position: relative; padding-right: 28px;
  user-select: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 2px; top: 50%;
  transform: translateY(-50%);
  font-size: 20px; font-weight: 400; color: var(--accent);
  transition: transform .15s;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { margin: 0 0 16px; color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.faq details a { color: var(--accent); }

.explainer-end { padding-bottom: 48px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; text-align: center; color: var(--text-muted); font-size: 13px; }
.site-footer nav { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; margin-bottom: 10px; }
.site-footer a { color: var(--text-muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); }
.site-footer p { margin: 0; }

/* Mobile (shared) */
@media (max-width: 640px) {
  .controls { gap: 14px; }
  .control-group.actions { margin-left: 0; }
  .hero { padding: 36px 0 22px; }
  .header-nav { gap: 12px; }
  .header-nav a { font-size: 13px; }
  /* Palette direct link lives inside the Tools dropdown too — drop it on tiny screens */
  .header-nav > a:first-of-type { display: none; }
  /* keep everything on one line: brand shrinks to the five dots */
  .header-nav { flex-wrap: nowrap; }
  .logo { font-size: 0; gap: 0; }
  .k-item { grid-template-columns: 40px 1fr auto; gap: 12px; }
}

/* ---------- Example blocks (tool pages: photo → result) ---------- */
.ex-flow {
  display: grid; grid-template-columns: 1fr 40px 1fr; gap: 14px; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow);
}
.ex-flow img { width: 100%; border-radius: 10px; display: block; }
.ex-arrow { font-size: 26px; color: var(--accent); font-weight: 700; text-align: center; }
.ex-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.ex-chip { border-radius: 8px; height: 46px; position: relative; border: 1px solid var(--border); }
.ex-chip code {
  position: absolute; left: 5px; bottom: 4px;
  font-family: var(--mono); font-size: 9.5px; padding: 1px 4px; border-radius: 4px;
  background: rgba(0, 0, 0, .45); color: #fff;
}
.ex-rows { display: grid; gap: 6px; }
.ex-row {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 12px;
}
.ex-row .fmt { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; color: var(--text-muted); text-transform: uppercase; }
.ex-row code { font-family: var(--mono); font-size: 12.5px; }
.ex-scale { display: flex; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); height: 44px; }
.ex-scale i { flex: 1; }
.ex-caption { margin: 10px 0 0; font-size: 12px; color: var(--text-muted); font-family: var(--mono); }
.ex-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 6px; }
.ex-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.ex-sample { border-radius: 10px; padding: 16px; font-weight: 700; font-size: 14px; border: 1px solid var(--border); }
.ex-badge { display: inline-block; border-radius: 99px; padding: 2px 10px; font-size: 10.5px; font-weight: 800; margin-top: 10px; font-family: var(--mono); }
.ex-badge.pass { background: #1a7f4b22; color: #2fbf75; }
.ex-badge.fail { background: #e5484d22; color: #e5484d; }
@media (max-width: 700px) {
  .ex-flow { grid-template-columns: 1fr; }
  .ex-arrow { transform: rotate(90deg); }
  .ex-pair { grid-template-columns: 1fr; }
}