:root {
  --bg: #ffffff;
  --ink: #111111;
  --ink-soft: #5c5c5c;
  --line: #e6e6e6;
  --line-strong: #111111;
  --fill: #f6f6f6;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* ---- Top bar ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1060px;
  margin: 0 auto;
  padding: 16px 24px;
}
.wordmark {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.topnav { display: flex; gap: 24px; }
.topnav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
}
.topnav a:hover, .topnav a[aria-current="page"] { color: var(--ink); }

/* ---- Layout ---- */
main {
  max-width: 1060px;
  margin: 0 auto;
  padding: 4px 24px 56px;
}
.screen { margin-bottom: 32px; }

/* Reading-width screen (everything except the landing hero) */
#tool { max-width: 640px; margin-left: auto; margin-right: auto; }

/* ---- Landing hero ---- */
.hero-band {
  background: var(--fill);
  border-radius: 24px;
  padding: 0 56px;
}
.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 36px 0;
}
.hero-copy { min-width: 0; }
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-soft);
  margin: 0 0 16px;
}
h1 {
  font-size: 38px;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 0 0 18px;
  font-weight: 700;
  text-wrap: balance;
}
.landing-lead {
  font-size: 17px;
  color: var(--ink-soft);
  margin: 0 0 24px;
  max-width: 30em;
  text-wrap: pretty;
}

/* CTA */
.cta { display: flex; align-items: center; flex-wrap: wrap; gap: 14px 24px; }
.cta-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}
.cta-link:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Key facts, inside the hero under the CTA */
.hero-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, auto);
  justify-content: start;
  gap: 10px 28px;
  font-size: 14px;
  color: var(--ink-soft);
}
.hero-facts li { display: flex; align-items: center; gap: 10px; }
.hero-facts li::before {
  content: "";
  flex: none;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: var(--ink) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.2 2.2 4.8-4.8' fill='none' stroke='%23fff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 16px no-repeat;
}

/* ---- Demo: real recording framed as a browser window ---- */
.demo {
  margin: 0;
  min-width: 0;
  width: 100%;
  max-width: 400px;
  justify-self: center;
}
.demo-chrome {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: 14px 14px 0 0;
}
.dots { display: flex; gap: 6px; }
.dots i { width: 9px; height: 9px; border-radius: 999px; background: var(--line); }
.demo-url {
  flex: 1;
  max-width: 220px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 0 auto;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--fill);
  font-size: 11.5px;
  color: var(--ink-soft);
  text-align: center;
}
.demo video {
  display: block;
  width: 100%;
  aspect-ratio: 1000 / 886;
  object-fit: cover;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0 0 14px 14px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 18px 40px rgba(0, 0, 0, .08);
}
.demo-foot {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--ink-soft);
}
.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--ink);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) {
  .live-dot { animation: none; }
}

/* Hero collapses to one column on narrow screens */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 44px 0;
  }
  .demo { max-width: 560px; width: 100%; margin: 0 auto; }
  h1 { font-size: 34px; }
}

/* ---- Buttons ---- */
.btn {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity .15s, background .15s, border-color .15s;
}
.btn-dark {
  background: var(--ink);
  color: #fff;
}
.btn-dark:hover { opacity: 0.85; }
.btn-plain {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-plain:hover { background: var(--fill); }
.btn-lg { padding: 15px 28px; font-size: 16px; border-radius: 12px; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.btn-row .btn-dark { flex: 1; min-width: 180px; }

/* ---- Tool views ---- */
.view-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}
.view-sub {
  font-size: 15px;
  color: var(--ink-soft);
  margin: -8px 0 18px;
  max-width: 40em;
}
.view-center { text-align: center; padding: 48px 0; }

/* Dropzone */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  padding: 54px 20px;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover { border-color: var(--ink); }
.dropzone.dragover { border-color: var(--ink); background: var(--fill); }
.dz-title { font-weight: 600; font-size: 16px; }
.dz-sub { font-size: 14px; color: var(--ink-soft); }
.dropzone:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.tips {
  margin: 16px 0 0;
  padding-left: 18px;
  font-size: 13.5px;
  color: var(--ink-soft);
}
.tips li { margin-bottom: 4px; }

.file-error {
  margin: 14px 0 0;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
}

/* Preview */
.preview-wrap {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  height: 340px;
}
/* Fill the frame so small images are still easy to check (scaled up, never cropped). */
#preview-img { width: 100%; height: 100%; display: block; object-fit: contain; }
.file-meta {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}
.quality-note {
  margin: 10px 0 0;
  padding: 10px 14px;
  border: 1px dashed var(--ink-soft);
  border-radius: 10px;
  font-size: 13.5px;
  color: var(--ink);
}
.result-meta {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--ink-soft);
}
@media (max-width: 540px) {
  .preview-wrap { height: 240px; }
}

/* Loading */
.spinner {
  width: 34px; height: 34px;
  margin: 0 auto 18px;
  border: 2px solid var(--line);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { font-weight: 600; margin: 0; font-size: 16px; }
.loading-sub { color: var(--ink-soft); font-size: 14px; margin: 6px 0 0; }

/* Results */
.verdict {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 22px;
}
.verdict-label { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; }
.verdict-tag { font-size: 13px; color: var(--ink-soft); }
.verdict.is-uncertain { border-style: dashed; }

.scores { display: flex; flex-direction: column; gap: 18px; }
.score-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.score-name { font-weight: 600; font-size: 15px; }
.score-val { font-weight: 700; font-size: 17px; font-variant-numeric: tabular-nums; }
.meter {
  height: 10px;
  background: var(--fill);
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}
.bar {
  height: 100%;
  width: 0;
  background: var(--ink);
  border-radius: 999px;
  transition: width .7s cubic-bezier(.16,1,.3,1);
}

.score-explainer {
  margin: 22px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

/* ---- Tool progress steps ---- */
.progress {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
}
.progress-step {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 10px;
  border-top: 2px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  transition: border-color .25s, color .25s;
}
.progress-n {
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  transition: background .25s, color .25s, border-color .25s;
}
.progress-step.is-current,
.progress-step.is-done { border-top-color: var(--ink); color: var(--ink); }
.progress-step.is-current .progress-n,
.progress-step.is-done .progress-n { background: var(--ink); border-color: var(--ink); color: #fff; }

/* Fade between tool views */
.view-enter { animation: view-in .28s ease-out; }
@keyframes view-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .view-enter { animation: none; }
}

/* Results: image beside scores */
.result-body {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  align-items: center;
}
.result-thumb {
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.result-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
@media (max-width: 540px) {
  .result-body { grid-template-columns: 1fr; }
  .result-thumb { max-height: 240px; aspect-ratio: auto; }
  .result-thumb img { max-height: 240px; }
}

/* Disclaimer */
/* Compact: one line by default, full text on expand */
.disclaimer {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 16px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}
.disclaimer summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}
.disclaimer summary::-webkit-details-marker { display: none; }
.disclaimer-toggle {
  flex: none;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}
.disclaimer-toggle::after { content: " +"; }
.disclaimer[open] .disclaimer-toggle::after { content: " −"; }
.disclaimer summary:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 6px; }
.disclaimer p { margin: 0 0 12px; font-size: 13px; color: var(--ink-soft); }
.disclaimer strong { color: var(--ink); }
@media (max-width: 540px) {
  .disclaimer summary { flex-direction: column; align-items: flex-start; gap: 6px; }
}

/* Footer */
.site-footer {
  max-width: 1012px;
  margin: 0 auto 48px;
  padding: 24px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  color: var(--ink-soft);
  font-size: 13px;
}
.site-footer p { margin: 0; }
.footer-credit {
  font-size: 14px;
  color: var(--ink);
  font-weight: 600;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; }
.footer-links a { color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
@media (max-width: 1060px) {
  .site-footer { margin-left: 24px; margin-right: 24px; }
}
.footer-credit a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.footer-credit a:hover { opacity: 0.7; }

/* ---- Text pages (How it works, Privacy) ---- */
.prose { max-width: 680px; margin: 0 auto; padding: 32px 0 16px; }
.prose h1 { font-size: 36px; margin-bottom: 14px; }
.prose .lede { font-size: 17px; color: var(--ink-soft); margin: 0 0 36px; }
.prose h2 {
  font-size: 19px;
  letter-spacing: -0.01em;
  margin: 36px 0 10px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.prose p, .prose li { font-size: 15.5px; color: #333; }
.prose ul { padding-left: 20px; margin: 0 0 12px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); }
.prose a { color: var(--ink); text-underline-offset: 2px; }

/* Responsive */
@media (max-width: 900px) {
  .hero-band { padding: 0 28px; }
}
@media (max-width: 540px) {
  .hero-band { padding: 0 20px; border-radius: 18px; }
  .hero { padding: 36px 0; }
  .prose h1 { font-size: 29px; }
  h1 { font-size: 29px; }
  .landing-lead { font-size: 16px; }
  .btn-row .btn-dark { min-width: 0; }
  .cta { gap: 10px; }
  .cta .btn-lg { width: 100%; }
  .landing-meta { gap: 8px; flex-direction: column; }
}

/* When the tool is open, keep the disclaimer the same width as the tool column */
main:has(#tool:not([hidden])) .disclaimer { max-width: 640px; margin-left: auto; margin-right: auto; }

/* Outline of the center square the model actually analyzes */
.crop-box {
  position: absolute;
  border: 2px solid #fff;
  border-radius: 4px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, .45);
  pointer-events: none;
}
.crop-box span {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .7);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
}

/* Upload area: reads as a clickable target */
.dropzone {
  background: var(--fill);
  border-color: #d6d6d6;
  gap: 10px;
}
.dz-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--line);
}
.dz-browse {
  margin-top: 4px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
}
.dropzone:hover .dz-browse { opacity: .85; }

/* Back link above the tool */
.back-link {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 14px;
  color: var(--ink-soft);
  cursor: pointer;
}
.back-link:hover { color: var(--ink); }

/* ---- Founder: compact strip so it's visible on a laptop screen ---- */
.founder {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 32px;
  align-items: center;
  margin: 20px 0 32px;
  padding: 20px 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
}
.founder-photo { margin: 0; }
.founder-photo img {
  display: block;
  width: 128px;
  height: 128px;
  object-fit: cover;
  border-radius: 16px;
  background: var(--fill);
}
.founder-photo figcaption { margin-top: 8px; font-size: 11.5px; line-height: 1.35; color: var(--ink-soft); }
.founder-text .eyebrow { margin-bottom: 8px; }
.founder-text h2 { font-size: 21px; letter-spacing: -0.015em; line-height: 1.25; margin: 0 0 10px; text-wrap: balance; }
.founder-text p { font-size: 15px; color: #333; margin: 0 0 8px; max-width: 46em; }
.founder-credit { font-size: 12px !important; color: var(--ink-soft) !important; margin: 2px 0 0 !important; }
.founder-sign { font-weight: 600; color: var(--ink) !important; margin: 6px 0 0 !important; }
@media (max-width: 700px) {
  .founder { grid-template-columns: 1fr; gap: 18px; padding: 22px; }
}

/* Dataset credit on How it works */
.credit {
  margin: 16px 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--fill);
}
.credit-label {
  margin: 0 0 6px !important;
  font-size: 12px !important;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-soft) !important;
}
.credit p { font-size: 14.5px; margin: 0; }
@media (max-width: 540px) {
  .hero-facts { grid-template-columns: 1fr; }
}

/* ---- Research & teaching page ---- */
.steps-plain { padding-left: 20px; margin: 0 0 16px; }
.steps-plain li { font-size: 15.5px; color: #333; margin-bottom: 8px; }
.cite-box {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--fill);
}
.cite-box p { margin: 0; font-size: 14.5px; overflow-wrap: anywhere; }
.cite-copy { flex: none; padding: 7px 14px; font-size: 13px; }
.small-note { font-size: 13.5px !important; color: var(--ink-soft) !important; }
.topnav a { white-space: nowrap; }
@media (max-width: 540px) {
  .topnav { gap: 16px; }
  .topnav a { font-size: 13.5px; }
}

/* ---- Text pages: same look as the homepage ---- */
.prose { max-width: 760px; padding: 8px 0 16px; }
.page-head {
  background: var(--fill);
  border-radius: 24px;
  padding: 40px 44px;
  margin-bottom: 16px;
}
.page-head .eyebrow { margin-bottom: 12px; }
.page-head h1 { margin-bottom: 10px; }
.page-head .lede { margin: 0; }
.block {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 30px;
  margin: 0 0 14px;
}
.block h2 { margin: 0 0 10px; padding-top: 0; border-top: 0; }
.block > :last-child { margin-bottom: 0; }

/* ---- Footer: credit + links, one meta line underneath ---- */
.footer-meta { flex-basis: 100%; margin: 0; font-size: 12.5px; color: var(--ink-soft); }

@media (max-width: 540px) {
  .topbar { padding: 14px 16px; }
  .wordmark { font-size: 20px; }
  .topnav { gap: 14px; }
  .topnav a { font-size: 13px; }
  .topnav a[href="/privacy"] { display: none; } /* still in the footer */
  main { padding-left: 16px; padding-right: 16px; }
  .page-head { padding: 28px 22px; border-radius: 20px; }
  .page-head .eyebrow { letter-spacing: .1em; font-size: 11px; }
  .block { padding: 20px 18px; border-radius: 16px; }
  .cite-box { flex-direction: column; align-items: stretch; }
  .cite-copy { align-self: flex-start; }
  .site-footer { margin-left: 16px; margin-right: 16px; flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-links { gap: 8px 16px; }
}

/* Touch screens can't drag and drop */
.dz-touch { display: none; }
@media (hover: none) and (pointer: coarse) {
  .dz-desktop { display: none; }
  .dz-touch { display: inline; }
}