/* ═══════════════════════════════════════════════════════════════
   Forensic Pop · design layer v2
   Loaded after style.css. Presentation only: no selector the tests or
   data-i18n hooks rely on is renamed. Concept: a lab notebook — bone
   paper, ink rules, one lime signal, mono annotations, hard shadows.
   ═══════════════════════════════════════════════════════════════ */

:root {
  --grid-line: rgb(21 21 21 / 0.055);
  --pop-ink: #151515;
  --pop-shadow: 5px 5px 0 var(--pop-ink);
  --pop-shadow-hover: 8px 8px 0 var(--pop-ink);
  --hair: 1px solid var(--border);
  --page-max: 1160px;
  --section-gap: clamp(28px, 5vw, 56px);
  --font-cjk-tight: -0.02em;
  /* several components reference --text-muted, which tokens.css never defined
     (invalid var → inherited link blue); alias it to the real muted token */
  --text-muted: var(--muted);
}
:root:not([data-theme="light"]) {
  --grid-line: rgb(244 240 232 / 0.045);
  --pop-ink: #f4f0e8;
}
[data-theme="light"] {
  --grid-line: rgb(21 21 21 / 0.055);
  --pop-ink: #151515;
}

html { overflow-x: clip; scroll-padding-top: 84px; }
::selection { background: var(--fp-verified); color: #0f1a02; }

/* ── paper: solid base + faint graph grid that fades down the page ── */
body, body[data-theme="light"] {
  background: var(--bg);
  position: relative;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: min(1100px, 100%);
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 35%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, #000 35%, transparent 100%);
}

/* ── header: sticky ruled bar ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  max-width: var(--page-max);
  padding: 12px 20px;
  gap: 4px;
}
.site-header::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: var(--hair);
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 17px;
  letter-spacing: -0.03em;
  color: var(--text-strong);
  text-decoration: none;
}
.site-logo::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--fp-verified);
  border: 1.5px solid var(--pop-ink);
  box-shadow: 2px 2px 0 var(--pop-ink);
  transition: transform var(--motion) var(--ease);
}
.site-logo:hover::before { transform: rotate(45deg) scale(1.05); }

.nav-link {
  position: relative;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-soft);
  background: none;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  background: var(--fp-verified);
  box-shadow: 0 0 0 0.5px var(--pop-ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--motion) var(--ease);
}
.nav-link:hover { background: none; color: var(--text-strong); }
.nav-link:hover::after { transform: scaleX(1); }

.lang-select, .theme-btn {
  background-color: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.lang-select {
  border-radius: 8px;
  font-weight: 500;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23151515'/%3E%3C/svg%3E");
}
:root:not([data-theme="light"]) .lang-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23f4f0e8'/%3E%3C/svg%3E");
}
.lang-select:hover, .lang-select:focus { border-color: var(--pop-ink); background-color: rgb(var(--overlay-rgb) / 0.05); }
.hamburger { border-color: var(--border-strong); }
.hamburger span { background: var(--text-strong); }
.theme-btn:hover { background: rgb(var(--overlay-rgb) / 0.08); }
.theme-btn { color: var(--text); }

@media (max-width: 900px) {
  .site-header { padding: 10px 14px; }
}

/* ── hero: open paper, not a card ── */
.hero.card {
  background: transparent;
  border: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-radius: 0;
  padding: clamp(28px, 5vw, 64px) 0 clamp(24px, 3vw, 40px);
  margin-bottom: 0;
  overflow: visible;
}
.hero::after { display: none; }
.hero-layout {
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}
.eyebrow {
  gap: 10px;
  align-items: center;
  padding: 0;
  margin-bottom: 4px;
  background: none;
  color: var(--text-soft);
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.14em;
}
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fp-verified);
  box-shadow: 0 0 0 3px rgb(var(--accent-rgb) / 0.28);
  animation: pop-pulse 2.4s ease-in-out infinite;
}
@keyframes pop-pulse {
  50% { box-shadow: 0 0 0 7px rgb(var(--accent-rgb) / 0); }
}

h1, h2, .file-anatomy figcaption { text-wrap: balance; word-break: keep-all; }
.hero h1 {
  max-width: 11em;
  font-size: clamp(34px, 4.7vw, 64px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.035em;
  margin: 22px 0 22px;
  color: var(--text-strong);
}
:lang(zh) .hero h1, .hero h1:lang(zh), :lang(ja) .hero h1, :lang(ko) .hero h1 {
  letter-spacing: var(--font-cjk-tight);
  line-height: 1.12;
}
/* Latin headlines run longer than CJK ones: smaller size, wider measure */
html:not(:lang(zh)):not(:lang(ja)):not(:lang(ko)) .hero h1 {
  max-width: 15em;
  font-size: clamp(32px, 4.1vw, 56px);
  line-height: 1.06;
}
.hero .lead {
  max-width: 34em;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.75;
  color: var(--text-soft);
  text-wrap: pretty;
}
.hero-actions { margin-top: 30px; gap: 18px; }
.hero-privacy {
  order: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  font: 500 12.5px/1.5 var(--font-mono);
  color: var(--muted);
}
.hero-privacy::before {
  content: "";
  flex: none;
  width: 18px;
  height: 1px;
  border-radius: 0;
  box-shadow: none;
  background: var(--muted);
}
.hero-actions { justify-content: flex-start; align-items: center; }
.hero-cta { gap: 14px; justify-content: flex-start; }

/* ── buttons: hard-shadow pop ── */
.btn-primary, .btn-secondary {
  min-height: 52px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.005em;
  transition: transform var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
.btn-primary {
  background: var(--fp-verified);
  color: #0f1a02;
  border: 2px solid var(--pop-ink);
  box-shadow: var(--pop-shadow);
}
.btn-primary:hover {
  opacity: 1;
  transform: translate(-2px, -2px);
  box-shadow: var(--pop-shadow-hover);
}
.btn-primary:active {
  transform: translate(3px, 3px);
  box-shadow: 1px 1px 0 var(--pop-ink);
}
.btn-secondary {
  background: transparent;
  color: var(--text-strong);
  border: 2px solid var(--border-strong);
}
.btn-secondary:hover {
  transform: translate(-1px, -1px);
  border-color: var(--pop-ink);
  background: rgb(var(--overlay-rgb) / 0.05);
}

/* ── specimen card: the signature object ── */
.hero-visual {
  transform: perspective(1200px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) rotate(1.6deg);
  transition: transform 260ms var(--ease);
  will-change: transform;
}
.hero .hero-visual svg { filter: drop-shadow(10px 10px 0 var(--pop-ink)) !important; }
.hero .hero-visual .hv-panel { fill: var(--surface); stroke: var(--pop-ink); stroke-width: 2; }

/* ── trust strip: ruled columns, numbered ── */
.trust-list {
  counter-reset: trust;
  gap: 0;
  margin-top: clamp(40px, 6vw, 72px);
  border-top: 2px solid var(--pop-ink);
}
.trust-list li {
  counter-increment: trust;
  position: relative;
  padding: 20px 24px 4px 0;
  background: none;
  border: 0;
  border-radius: 0;
}
.trust-list li + li { padding-left: 24px; border-left: var(--hair); }
.trust-list li::before {
  content: counter(trust, decimal-leading-zero);
  display: block;
  margin-bottom: 10px;
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--muted);
}
.trust-list strong { font-size: 17px; letter-spacing: -0.01em; }
.trust-list span { color: var(--text-soft); }

/* ── notice: a margin note, not an alert box ── */
.notice.warning {
  margin-top: 28px;
  padding: 2px 0 2px 18px;
  border: 0;
  border-left: 3px solid var(--fp-weak);
  border-radius: 0;
  background: none;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.75;
}
.notice.warning strong { color: var(--text-strong); }

/* ── sections: flat sheets with hairlines, numbered ── */
.card {
  border-radius: 18px;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.page { counter-reset: sheet; }
.page:not(.content-page) > section.card:not(.hero) {
  counter-increment: sheet;
  position: relative;
  margin-top: var(--section-gap);
  padding-top: clamp(28px, 4vw, 40px);
}
.page:not(.content-page) > section.card:not(.hero)::before {
  content: "§ " counter(sheet, decimal-leading-zero);
  position: absolute;
  top: -11px;
  left: 22px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg);
  border: var(--hair);
  font: 600 11px/1.4 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--muted);
}
h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.methodology-heading { font-size: clamp(24px, 2.6vw, 32px); }

/* ── file anatomy: an ink terminal, the page's first "evidence" ── */
.file-anatomy-section.card {
  padding: 0;
  background: transparent;
  border: 0;
}
.file-anatomy-section.card::before { display: none; }
.file-anatomy {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 440px) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
}
.anatomy-tree {
  margin: 0;
  padding: clamp(20px, 3vw, 32px);
  border: 2px solid var(--pop-ink);
  border-radius: 16px;
  background: #151515;
  color: #f4f0e8;
  font: 500 clamp(13px, 1.4vw, 15px)/1.9 var(--font-mono);
  box-shadow: 6px 6px 0 var(--fp-verified);
  overflow-x: auto;
}
.anatomy-tree .anatomy-line { color: #f4f0e8; }
.anatomy-tree .anatomy-line:first-child { color: var(--fp-verified); font-weight: 600; }
.file-anatomy figcaption {
  margin: 0;
  max-width: 16em;
  font: 800 clamp(24px, 3.2vw, 40px)/1.25 var(--font-display);
  letter-spacing: -0.02em;
  color: var(--text-strong);
  text-wrap: balance;
}
@media (max-width: 760px) {
  .file-anatomy { grid-template-columns: minmax(0, 1fr); }
}

/* ── detector: the machine itself ── */
.primary-grid { gap: 24px; margin-top: var(--section-gap); }
.upload-card {
  background: var(--surface);
  border: 2px solid var(--pop-ink);
  box-shadow: var(--pop-shadow);
}
.result-card { background: var(--surface); }
.upload-card h2, .result-card h2 { font-size: clamp(22px, 2.2vw, 28px); }
.upload {
  min-height: 220px;
  gap: 10px;
  border: 2px dashed var(--border-strong);
  border-radius: 16px;
  background:
    repeating-linear-gradient(135deg, transparent 0 11px, rgb(var(--overlay-rgb) / 0.035) 11px 12px),
    var(--surface-2);
}
.upload:hover, .upload.drag-over, .upload:focus-within {
  transform: none;
  border-color: var(--pop-ink);
  background:
    repeating-linear-gradient(135deg, transparent 0 11px, rgb(var(--accent-rgb) / 0.22) 11px 12px),
    rgb(var(--accent-rgb) / 0.14);
}
.upload-icon {
  width: 56px;
  height: 56px;
  background: var(--fp-verified);
  color: #0f1a02;
  border: 2px solid var(--pop-ink);
  box-shadow: 3px 3px 0 var(--pop-ink);
  transition: transform var(--motion) var(--ease);
}
.upload:hover .upload-icon, .upload.drag-over .upload-icon { transform: translateY(-4px) rotate(-6deg); }
.upload-icon svg { width: 26px; height: 26px; }
.upload-title { font-size: 19px; letter-spacing: -0.01em; }
.upload small { color: var(--text-soft); font: 500 12px/1.6 var(--font-mono); }

.primary {
  margin-top: 18px;
  min-height: 54px;
  border: 2px solid var(--pop-ink);
  border-radius: 12px;
  background: var(--fp-verified);
  color: #0f1a02;
  box-shadow: 4px 4px 0 var(--pop-ink);
  transition: transform var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease);
}
.primary:hover:not(:disabled) {
  filter: none;
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--pop-ink);
}
.primary:active:not(:disabled) { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--pop-ink); }
.primary:disabled {
  opacity: 1;
  background: transparent;
  color: var(--muted);
  border: 2px dashed var(--border-strong);
  box-shadow: none;
}
.status { font: 500 13px/1.6 var(--font-mono); }
.expert-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  white-space: nowrap;
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--text-soft);
  cursor: pointer;
}
.expert-toggle input { accent-color: var(--pop-ink); width: 16px; height: 16px; }
.empty-state {
  border: 1px dashed var(--border-strong);
  border-radius: 14px;
  background: none;
}

/* ── evidence vanish: a signal bar that drains with every re-share ── */
[data-theme="light"] { --success: var(--accent-text); }
.vanish-steps { gap: 12px; }
.vanish-step {
  position: relative;
  overflow: hidden;
  padding: 16px 18px 20px;
  border-radius: 12px;
  background: var(--surface);
  border: var(--hair);
}
.vanish-step::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 4px;
  width: var(--sig, 0%);
  background: var(--fail);
  transition: width 900ms var(--ease) 200ms;
}
.vanish-step:nth-child(1) { --sig: 100%; }
.vanish-step:nth-child(2) { --sig: 62%; }
.vanish-step:nth-child(3) { --sig: 38%; }
.vanish-step:nth-child(4) { --sig: 16%; }
.vanish-step:nth-child(5) { --sig: 4%; }
.vanish-step--intact { background: rgb(var(--accent-rgb) / 0.12); border-color: var(--pop-ink); }
.vanish-step--intact::after { background: var(--fp-verified); box-shadow: 0 -1px 0 var(--pop-ink), 0 1px 0 var(--pop-ink); }
.vanish-step:not(.active)::after { width: 0; }
.vanish-step-num {
  background: var(--pop-ink);
  color: var(--bg);
  font: 700 12px/1 var(--font-mono);
}
.vanish-step-title { font-weight: 600; }
.vanish-badge { font: 700 11px/1.4 var(--font-mono); letter-spacing: 0.06em; }
.vanish-badge--intact { background: var(--fp-verified); color: #0f1a02; border: 1.5px solid var(--pop-ink); }
.vanish-badge--lost { background: none; color: var(--fail); border: 1.5px solid currentColor; }
[data-theme="light"] .vanish-badge--lost { color: #b91c1c; }
.vanish-emphasis {
  max-width: none;
  margin-top: 24px;
  padding: 18px 22px;
  border: 2px solid var(--pop-ink);
  border-radius: 12px;
  background: #151515;
  color: #f4f0e8;
  box-shadow: 5px 5px 0 var(--fp-verified);
  font-size: clamp(16px, 1.8vw, 19px);
}
.vanish-emphasis strong { color: #f4f0e8; font-weight: 700; }

/* ── five layers: index cards that open like a drawer ── */
.five-layer-list { gap: 10px; margin-top: 22px; }
.evidence-layer.card {
  border-radius: 12px;
  background: var(--surface);
  border: var(--hair);
  transition: box-shadow var(--motion) var(--ease), border-color var(--motion) var(--ease), transform var(--motion) var(--ease);
}
.evidence-layer[open] {
  border: 2px solid var(--pop-ink);
  box-shadow: 4px 4px 0 var(--pop-ink);
}
.evidence-layer-summary { padding: 16px 18px; }
.evidence-layer-summary:hover { background: rgb(var(--accent-rgb) / 0.16); }
.evidence-layer-num {
  background: var(--pop-ink);
  color: var(--bg);
  font: 700 12px/1 var(--font-mono);
}
.evidence-layer-title { font-weight: 600; letter-spacing: -0.005em; }
.evidence-layer-chevron { color: var(--text); }
.evidence-layer-fields { background: #151515; color: #f4f0e8; border-top: 2px solid var(--pop-ink); }

/* ── capsules and tags: ink-outlined stickers ── */
.platform-capsule-row { gap: 12px; margin-top: 22px; }
.platform-capsule, .tag-list li {
  border: 1.5px solid var(--pop-ink);
  background: var(--surface);
  color: var(--text-strong);
  font-weight: 600;
  box-shadow: 2px 2px 0 var(--pop-ink);
  transition: transform var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
.platform-capsule:hover {
  background: var(--fp-verified);
  color: #0f1a02;
  border-color: var(--pop-ink);
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--pop-ink);
}
.platform-capsule:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--pop-ink); }
.tag-list li { font: 500 13px/1.4 var(--font-mono); }
.tag-inline {
  background: none;
  border: 1px solid var(--border-strong);
  color: var(--text-soft);
  font: 500 11.5px/1.4 var(--font-mono);
  letter-spacing: 0.02em;
}

/* ── hero choreography: short, transform/opacity only, LCP-safe ── */
@media (prefers-reduced-motion: no-preference) {
  .hero h1 { animation: pop-rise-t 640ms var(--ease) both; }
  .hero .eyebrow, .hero .lead, .hero-actions, .trust-list { animation: pop-rise 640ms var(--ease) both; }
  .hero .lead { animation-delay: 90ms; }
  .hero-actions { animation-delay: 170ms; }
  .hero-visual { animation: pop-rise-v 800ms var(--ease) 140ms both; }
  .trust-list { animation-delay: 260ms; }
  @keyframes pop-rise { from { opacity: 0; translate: 0 16px; } }
  @keyframes pop-rise-t { from { translate: 0 22px; } }
  @keyframes pop-rise-v { from { opacity: 0; translate: 0 32px; } }
}

/* ── signal ticker: a full-bleed evidence band, decorative ── */
.signal-ticker {
  position: relative;
  left: 50%;
  width: 100vw;
  margin: clamp(36px, 6vw, 64px) 0 0;
  padding: 15px 0;
  transform: translateX(-50%) rotate(-1.1deg);
  background: #151515;
  color: #f4f0e8;
  border-block: 2px solid var(--pop-ink);
  overflow: hidden;
  pointer-events: none;
  user-select: none;
}
.signal-ticker__track {
  display: flex;
  width: max-content;
  animation: pop-ticker 46s linear infinite;
}
.signal-ticker span {
  display: inline-flex;
  align-items: center;
  padding-left: 28px;
  font: 600 13px/1 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}
.signal-ticker span::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-left: 28px;
  background: var(--fp-verified);
  transform: rotate(45deg);
}
@keyframes pop-ticker { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .signal-ticker__track { animation: none; }
  .signal-ticker { transform: translateX(-50%); }
}

/* ── reading measure: ≈40 CJK characters, never a 1100px line ── */
.content-section > p,
.content-section > .content-list,
.content-section > .faq-list,
.content-section > .muted { max-width: 46em; }
.content-section p { text-wrap: pretty; line-height: 1.85; }
.content-section > h3 { margin-top: 1.8em; font-size: 18px; letter-spacing: -0.01em; }
.content-section .content-list li::marker { color: var(--text); }

/* ── methodology: can / cannot as two ruled ledgers ── */
.methodology-cols { gap: 20px; }
.methodology-col {
  border-radius: 12px;
  background: var(--surface);
  border: var(--hair);
}
.methodology-col--can { background: var(--surface); border: 2px solid var(--pop-ink); box-shadow: 4px 4px 0 var(--fp-verified); }
.methodology-col--cannot { background: none; border: 2px dashed var(--border-strong); }
.methodology-col-title { font-size: 17px; }
.methodology-list li { color: var(--text-soft); }
.methodology-list--can li::marker { color: var(--accent-text); }
.methodology-slogan {
  margin-top: 28px;
  font: 800 clamp(20px, 2.4vw, 28px)/1.35 var(--font-display);
  letter-spacing: -0.02em;
  color: var(--text-strong);
}
.methodology-link {
  display: inline-flex;
  font-weight: 600;
  color: var(--text-strong);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--fp-verified);
  text-underline-offset: 5px;
}
.methodology-link:hover { color: var(--text-strong); text-decoration-thickness: 4px; }

/* methodology page ships its own scoped pastel columns; match the home ledger */
.methodology-grid .methodology-col--can { background: var(--surface) !important; border: 2px solid var(--pop-ink) !important; box-shadow: 4px 4px 0 var(--fp-verified); }
.methodology-grid .methodology-col--cannot { background: none !important; border: 2px dashed var(--border-strong) !important; }

/* ── sample + experiment galleries: compact exhibits, not text walls ── */
.sample-cards, .experiment-cards { gap: 20px; margin-top: 24px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.sample-card, .experiment-card {
  border-radius: 14px;
  background: var(--surface);
  border: var(--hair);
  transition: transform var(--motion) var(--ease), box-shadow var(--motion) var(--ease), border-color var(--motion) var(--ease);
}
.sample-card:hover, .experiment-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--pop-ink);
  box-shadow: 5px 5px 0 var(--pop-ink);
}
.sample-thumb { border-radius: 8px; border: 1.5px solid var(--pop-ink); }
.sample-title {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.sample-source, .sample-signals {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font: 500 12px/1.6 var(--font-mono);
}
.sample-limits {
  max-height: 7.2em;
  overflow: hidden;
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.6;
  -webkit-mask-image: linear-gradient(180deg, #000 55%, transparent);
  mask-image: linear-gradient(180deg, #000 55%, transparent);
}
.sample-meta .badge { font: 700 11px/1.4 var(--font-mono); }

.evidence-layer[open] { margin-bottom: 8px; }

/* ── article system: one column of reading + a sticky rail ── */
.content-page { max-width: var(--page-max); }
.breadcrumb { font: 500 12px/1.6 var(--font-mono); letter-spacing: 0.04em; color: var(--muted); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-soft); text-decoration: underline; text-decoration-color: var(--border-strong); text-underline-offset: 4px; }
.breadcrumb a:hover { color: var(--text-strong); text-decoration-color: var(--fp-verified); }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) 300px;
  gap: clamp(32px, 4vw, 64px);
  justify-content: center;
  align-items: start;
}
.article-layout > .content-article { max-width: none; }
.article-rail { position: sticky; top: 88px; }
.article-rail .ad-slot { margin: 0; }
/* one large unit at a time: rail on wide screens, inline when the rail is hidden */
@media (min-width: 1181px) { .ad-slot--article-inline { display: none; } }
@media (max-width: 1180px) {
  .article-layout { grid-template-columns: minmax(0, 760px); }
  .article-rail { display: none; }
}

.content-article.card { padding: clamp(24px, 5vw, 56px); border-radius: 20px; }
.content-page > .content-article { margin-inline: auto; }
.content-article h1 {
  max-width: 16em;
  margin: 20px 0 18px;
  font-size: clamp(30px, 3.8vw, 50px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-wrap: balance;
  color: var(--text-strong);
}
.content-article h2 { font-size: clamp(22px, 2.4vw, 30px); }
/* ruled chapter headings: only the article's own top-level sections */
.content-article > section > h2, .content-article > h2 {
  margin-top: clamp(40px, 5vw, 64px);
  padding-top: 20px;
  border-top: 2px solid var(--pop-ink);
}
.content-article > section:first-of-type > h2, .content-article > .priority-direct-answer > h2, .content-article > h2:first-child { border-top: 0; padding-top: 0; margin-top: 0; }
.content-article .article-update h2 { margin-top: 0; }
.content-article .article-meta { font: 500 12px/1.6 var(--font-mono); letter-spacing: 0.02em; color: var(--muted); margin: 0 0 22px; }
.content-article .lead-text { font-size: clamp(17px, 1.5vw, 19px); line-height: 1.75; color: var(--text); text-wrap: pretty; }
.content-article p, .content-article .content-list { line-height: 1.85; text-wrap: pretty; }
.content-article .content-list li::marker { color: var(--text); }
.article-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0;
  border: 0;
  border-radius: 0;
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.article-kicker::before { content: ""; width: 9px; height: 9px; background: var(--fp-verified); border: 1.5px solid var(--pop-ink); transform: rotate(45deg); }

.article-toc {
  border: 2px solid var(--pop-ink);
  border-radius: 12px;
  background: var(--surface-2);
  box-shadow: 4px 4px 0 var(--pop-ink);
  padding: 18px 22px;
}
.article-toc strong { font: 600 12px/1 var(--font-mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.article-toc-links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 14px; }
.content-article .article-toc-links a:not(.primary):not(.cta-btn) { color: var(--text-strong); font-weight: 500; text-decoration: none; background: linear-gradient(var(--fp-verified), var(--fp-verified)) 0 100% / 0 3px no-repeat; transition: background-size var(--motion) var(--ease); }
.article-toc-links a:hover { background-size: 100% 3px; }

.priority-direct-answer {
  margin: 36px 0 8px;
  padding: 22px 26px;
  border-left: 6px solid var(--fp-verified);
  background: rgb(var(--accent-rgb) / 0.12);
  border-radius: 0 14px 14px 0;
}
.priority-direct-answer p { margin-bottom: 0; font-size: 17px; }

.table-scroll {
  border: 1.5px solid var(--pop-ink);
  border-radius: 12px;
  background-color: var(--surface);
  /* scroll shadows: edges darken only while more content is hidden */
  background-image:
    linear-gradient(90deg, var(--surface) 30%, transparent),
    linear-gradient(270deg, var(--surface) 30%, transparent),
    radial-gradient(farthest-side at 0 50%, rgb(0 0 0 / 0.22), transparent),
    radial-gradient(farthest-side at 100% 50%, rgb(0 0 0 / 0.22), transparent);
  background-position: left center, right center, left center, right center;
  background-repeat: no-repeat;
  background-size: 48px 100%, 48px 100%, 14px 100%, 14px 100%;
  background-attachment: local, local, scroll, scroll;
}
.comparison-table tbody th, .evidence-table tbody th { background: rgb(var(--overlay-rgb) / 0.04); }
.comparison-table tbody tr:nth-child(even) td { background: rgb(var(--overlay-rgb) / 0.02); }
.tool-glossary { margin: 0; }
.tool-glossary th, .tool-glossary td { padding: 12px 16px; border-bottom: var(--hair); line-height: 1.65; }
.tool-glossary tr:last-child th, .tool-glossary tr:last-child td { border-bottom: 0; }
.tool-glossary thead th {
  background: var(--pop-ink);
  color: var(--bg);
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 0;
}
.tool-glossary tbody th { font-weight: 700; color: var(--text-strong); }
.evidence-table th { background: rgb(var(--overlay-rgb) / 0.035); }

.mechanism-card { border: 1.5px solid var(--pop-ink); border-radius: 12px; background: var(--surface); box-shadow: 3px 3px 0 var(--pop-ink); }
.mechanism-card h3 { font-size: 16px; }

.cta-box {
  margin: 36px 0;
  padding: 24px 28px;
  border: 2px solid var(--pop-ink);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 6px 6px 0 var(--fp-verified);
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.cta-box p { font-size: 18px; letter-spacing: -0.01em; }
.related-links a, .cta-box .related-links a {
  color: var(--text-strong);
  background: var(--surface);
  border: 1.5px solid var(--pop-ink);
  box-shadow: 2px 2px 0 var(--pop-ink);
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
.related-links a:hover { background: var(--fp-verified); color: #0f1a02; transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--pop-ink); }

.faq-item { background: var(--surface); border: var(--hair); border-radius: 12px; transition: border-color var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease); }
.faq-item[open] { border: 2px solid var(--pop-ink); box-shadow: 4px 4px 0 var(--pop-ink); }
.faq-item summary::before { content: "Q"; margin-right: 12px; font: 700 12px/1.9 var(--font-mono); color: var(--text-strong); }
.faq-item summary::after { color: var(--text-strong); }
.faq-item p { color: var(--text-soft); }

.content-article a:not(.primary):not(.cta-btn):not(.btn-primary) {
  text-decoration: underline;
  text-decoration-color: var(--fp-verified);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.content-article a:not(.primary):not(.cta-btn):not(.btn-primary):hover { text-decoration-thickness: 4px; }
.content-article .article-toc-links a:not(.primary):not(.cta-btn), .content-article .related-links a:not(.primary):not(.cta-btn) { text-decoration: none; }
.breadcrumb a { text-decoration: underline; }
.article-back a { font-weight: 600; color: var(--text-strong); }

/* ── blog index + generic page heroes ── */
.content-hero.card {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: clamp(28px, 5vw, 64px) 0 clamp(20px, 3vw, 32px);
  border-bottom: 2px solid var(--pop-ink);
}
.content-hero h1 { font-size: clamp(34px, 5vw, 64px); line-height: 1.06; max-width: 14em; margin-top: 0; }
.content-hero .lead-text { max-width: 36em; margin-bottom: 0; }
.root-feature-label, .featured-article-label {
  font: 600 12px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.root-feature.card, .featured-article-card.card {
  border: 2px solid var(--pop-ink);
  background: var(--surface);
  box-shadow: 6px 6px 0 var(--pop-ink);
}
.featured-article-card { color: var(--text); }
.root-feature .root-feature-mark, .featured-article-card .featured-article-mark {
  background: #151515 !important;
  border: 2px solid var(--pop-ink);
  border-radius: 14px;
  color: #f4f0e8;
}
.root-feature .root-feature-mark span, .root-feature .root-feature-mark small, .featured-article-card .featured-article-mark span, .featured-article-card .featured-article-mark small { color: #cfc9bb !important; font-family: var(--font-mono); }
.root-feature .root-feature-mark strong, .featured-article-card .featured-article-mark strong { color: var(--fp-verified); }
.blog-section-heading { margin-top: var(--section-gap); }
.blog-card.card {
  background: var(--surface);
  transition: transform var(--motion) var(--ease), box-shadow var(--motion) var(--ease), border-color var(--motion) var(--ease);
}
.blog-card.card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--pop-ink);
  box-shadow: 6px 6px 0 var(--pop-ink);
}
.blog-card h3 { letter-spacing: -0.01em; }
.blog-meta { font: 500 11.5px/1.4 var(--font-mono); letter-spacing: 0.02em; }
.card-link { font-weight: 700; color: var(--text-strong); }

/* ── theme icons keyed off <html>, so layouts that only set it still swap ── */
[data-theme="light"] .theme-btn .icon-sun { display: none; }
[data-theme="light"] .theme-btn .icon-moon { display: block; }

/* ── tool pages: controls that were unstyled browser defaults ── */
button.ghost, .tool-toolbar button {
  min-height: 40px;
  padding: 8px 16px;
  border: 1.5px solid var(--pop-ink);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-strong);
  font: 600 13px/1 var(--font-body);
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--pop-ink);
  transition: transform var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease), background var(--motion-fast) var(--ease);
}
button.ghost:hover, .tool-toolbar button:hover { background: var(--fp-verified); color: #0f1a02; transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--pop-ink); }
button.ghost:active, .tool-toolbar button:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--pop-ink); }
.tool-toolbar input[type="text"] {
  min-height: 40px;
  border: 1.5px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: 500 13px/1.4 var(--font-mono);
}
.tool-toolbar input[type="text"]:focus { outline: none; border-color: var(--pop-ink); box-shadow: var(--focus-ring); }
.tool-drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: 16px;
  background: repeating-linear-gradient(135deg, transparent 0 11px, rgb(var(--overlay-rgb) / 0.035) 11px 12px), var(--surface-2);
}
.tool-drop-zone:hover, .tool-drop-zone.drag-over { border-color: var(--pop-ink); background: repeating-linear-gradient(135deg, transparent 0 11px, rgb(var(--accent-rgb) / 0.22) 11px 12px), rgb(var(--accent-rgb) / 0.14); }
.tool-hub-card { border: 1.5px solid var(--pop-ink); border-radius: 12px; background: var(--surface); box-shadow: 3px 3px 0 var(--pop-ink); transition: transform var(--motion) var(--ease), box-shadow var(--motion) var(--ease); }
a.tool-hub-card:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--pop-ink); }

/* ── ad slots: labelled, reserved, theme-aware, visually quiet ── */
.ad-slot {
  display: grid;
  justify-items: center;
  gap: 10px;
  max-width: 970px;
  min-height: 90px;
  margin: var(--section-gap) auto;
  padding: 12px 0;
  border-block: 1px dashed var(--border-strong);
  background: none;
  overflow: hidden;
  text-align: center;
}
.ad-slot .ad-label {
  display: block;
  margin: 0;
  font: 600 10px/1 var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 1;
}
.ad-slot .ad-body {
  width: 100%;
  min-height: 90px;
  display: grid;
  place-items: center;
}
.ad-slot .ad-body:not(:has(ins, iframe, img, a)) {
  background: repeating-linear-gradient(135deg, transparent 0 9px, rgb(var(--overlay-rgb) / 0.045) 9px 10px);
  border-radius: 8px;
}
.ad-slot--rectangle .ad-body { min-height: 250px; }
.ad-slot:has(ins.adsbygoogle) .ad-body { min-height: 250px; }
.ad-slot--in-article { max-width: 760px; }
@media (max-width: 640px) {
  .ad-slot { max-width: 100%; }
}

/* ── footer ── */
.site-footer {
  margin-top: clamp(56px, 8vw, 104px);
  border-top: 2px solid var(--pop-ink);
}
.footer-inner { padding: 36px 20px 44px; gap: 16px; }
.footer-links { flex-wrap: wrap; justify-content: center; gap: 10px 24px; }
.footer-links a { font-weight: 500; color: var(--text-soft); }
.footer-links a:hover { color: var(--text-strong); text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--fp-verified); text-underline-offset: 5px; }
.footer-note { font: 500 12px/1.7 var(--font-mono); letter-spacing: 0.02em; text-align: center; }

/* ── responsive ── */
@media (max-width: 900px) {
  .hero-layout { grid-template-columns: minmax(0, 1fr); }
  .hero.card { padding-top: 28px; }
}
@media (max-width: 640px) {
  .trust-list { grid-template-columns: 1fr; border-top-width: 2px; }
  .trust-list li, .trust-list li + li { padding: 16px 0; border-left: 0; }
  .trust-list li + li { border-top: var(--hair); }
  .btn-primary, .btn-secondary { flex: 1 1 100%; }
  .page:not(.content-page) > section.card:not(.hero)::before { left: 16px; }
}

/* ── motion preferences ── */
@media (prefers-reduced-motion: reduce) {
  .eyebrow::before { animation: none; }
  .hero-visual { transform: none; transition: none; }
  .btn-primary, .btn-primary:hover, .btn-primary:active { transform: none; transition: none; }
}