:root {
  --primary: #0b57d0;
  --on-primary: #ffffff;
  --surface: #ffffff;
  --surface-low: #f8fafd;
  --on-surface: #1f1f1f;
  --on-surface-variant: #444746;
  --outline-variant: #e3e3e3;

  --success: #1e8e3e;
  --success-container: #e6f4ea;
  --on-success-container: #0d652d;
  --warning: #f9ab00;
  --error: #d93025;

  --corner-sm: 8px;
  --corner-md: 12px;
  --corner-lg: 16px;
  --corner-xl: 28px;
  --corner-full: 9999px;

  --elevation-1: 0 1px 2px rgba(0,0,0,0.06), 0 1px 3px 1px rgba(0,0,0,0.04);
  --elevation-2: 0 2px 6px rgba(0,0,0,0.05), 0 6px 16px rgba(0,0,0,0.06);

  --brand-font: "Google Sans", "Google Sans Text", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --plain-font: "Google Sans Text", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--plain-font);
  color: var(--on-surface);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--outline-variant);
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 18px;
}
.brand-mark { width: 28px; height: 28px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: var(--corner-full);
  border: none;
  cursor: pointer;
  transition: background 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--elevation-1);
}
.btn-primary:hover {
  background: #0a4fb8;
  box-shadow: var(--elevation-2);
}
.btn-text {
  background: transparent;
  color: var(--primary);
  padding: 10px 16px;
}
.btn-text:hover { background: rgba(11,87,208,0.06); }
.btn-lg {
  font-size: 15px;
  padding: 14px 28px;
}

/* Hero */
.hero {
  max-width: 880px;
  margin: 0 auto;
  padding: 96px 24px 72px;
  text-align: center;
}
.hero-logo {
  width: 128px;
  height: 128px;
  margin-bottom: 28px;
}
.wordmark {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 56px;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.tagline {
  font-family: var(--brand-font);
  font-size: 22px;
  font-weight: 400;
  color: var(--on-surface-variant);
  margin-bottom: 20px;
}
.tagline-accent {
  color: #1a8cff;
  font-weight: 700;
}
.inline-icon {
  width: 0.99em;
  height: 0.99em;
  vertical-align: -0.2em;
  margin: 0 2px;
}
.subhead {
  font-size: 18px;
  color: var(--on-surface-variant);
  max-width: 560px;
  margin: 0 auto 32px;
}
.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
  margin-bottom: 20px;
}
.price-note {
  font-size: 14px;
  color: var(--on-surface-variant);
}
.price-chip {
  display: inline-block;
  background: var(--success-container);
  color: var(--on-success-container);
  padding: 3px 10px;
  border-radius: var(--corner-full);
  font-weight: 500;
  font-size: 12px;
  margin-right: 6px;
}

/* Section shared */
.section-head {
  max-width: 720px;
  margin: 0 auto 40px;
  text-align: center;
}
.section-head h2 {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 36px;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.section-sub {
  font-size: 16px;
  color: var(--on-surface-variant);
}

/* Sample popup mockup */
.sample {
  padding: 72px 24px;
  max-width: 1120px;
  margin: 0 auto;
}
.popup-mock {
  max-width: 420px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--corner-xl);
  box-shadow: var(--elevation-2);
  overflow: hidden;
  border: 1px solid var(--outline-variant);
}
.popup-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--outline-variant);
}
.popup-mark { width: 22px; height: 22px; }
.popup-title {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 14px;
}
.popup-chip {
  margin-left: auto;
  font-size: 11px;
  background: var(--surface-low);
  border: 1px solid var(--outline-variant);
  padding: 3px 8px;
  border-radius: var(--corner-full);
  color: var(--on-surface-variant);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.popup-body { padding: 20px 18px; }
.verdict {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}
.score-ring {
  flex-shrink: 0;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: var(--success-container);
  color: var(--on-success-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--brand-font);
  line-height: 1;
}
.score-num {
  font-size: 24px;
  font-weight: 500;
}
.score-denom {
  font-size: 13px;
  opacity: 0.75;
  align-self: center;
}
.verdict-text { flex: 1; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--corner-full);
  margin-bottom: 8px;
}
.badge-good {
  background: var(--success-container);
  color: var(--on-success-container);
}
.badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}
.verdict-summary {
  font-size: 13px;
  line-height: 1.55;
  color: var(--on-surface);
}

.breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding: 16px;
  background: var(--surface-low);
  border-radius: var(--corner-md);
  margin-bottom: 16px;
}
.brk-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.brk-icon {
  color: var(--on-surface-variant);
  font-size: 20px !important;
}
.brk-label {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 12px;
  margin-bottom: 2px;
}
.brk-note {
  font-size: 11px;
  color: var(--on-surface-variant);
  line-height: 1.4;
}

.signals-label {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 12px;
  margin-bottom: 8px;
}
.signals ul { list-style: none; }
.signals li {
  font-size: 12px;
  color: var(--on-surface-variant);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sig-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.sig-dot.good { background: var(--success); }
.sig-dot.warn { background: var(--warning); }

/* Compare AI vs human */
.compare {
  padding: 72px 24px;
  max-width: 1120px;
  margin: 0 auto;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.compare-card {
  background: var(--surface);
  border-radius: var(--corner-xl);
  padding: 28px;
  box-shadow: var(--elevation-1);
  border: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
}
.compare-ai {
  background: #fffaf2;
  border-color: #f3e3c2;
}
.compare-human {
  background: #f3f9f5;
  border-color: #cfe7d8;
}
.compare-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.compare-head > div { flex: 1; }
.compare-icon {
  font-size: 28px !important;
  color: var(--on-surface-variant);
}
.compare-ai .compare-icon { color: #b06b00; }
.compare-human .compare-icon { color: var(--success); }
.compare-label {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 16px;
  line-height: 1.2;
}
.compare-meta {
  font-size: 12px;
  color: var(--on-surface-variant);
  margin-top: 2px;
}
.compare-copy {
  font-size: 15px;
  line-height: 1.6;
  color: var(--on-surface);
  margin-bottom: 20px;
  flex: 1;
}
.img-demo {
  margin: 0 0 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.img-demo svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--corner-md);
  border: 1px solid var(--outline-variant);
  background: #000;
}
.img-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: var(--corner-full);
  font-family: var(--brand-font);
}
.img-meta .material-symbols-outlined {
  font-size: 16px !important;
}
.img-meta em { font-style: italic; opacity: 0.85; }
.img-meta-bad {
  background: #fde9c7;
  color: #7a4d00;
}
.img-meta-good {
  background: var(--success-container);
  color: var(--on-success-container);
}
.tells {
  list-style: none;
  border-top: 1px solid var(--outline-variant);
  padding-top: 14px;
}
.tells li {
  font-size: 13px;
  color: var(--on-surface-variant);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 10px;
}
.badge-warn {
  background: #fde9c7;
  color: #7a4d00;
}
.badge-warn .dot { background: var(--warning); }

/* Features */
.features {
  padding: 72px 24px;
  max-width: 1120px;
  margin: 0 auto;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: var(--surface);
  border-radius: var(--corner-xl);
  padding: 32px 28px;
  box-shadow: var(--elevation-1);
  border: 1px solid var(--outline-variant);
}
.card-icon {
  font-size: 32px !important;
  color: var(--primary);
  margin-bottom: 16px;
}
.card h3 {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 20px;
  margin-bottom: 10px;
}
.card p {
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.55;
}

/* Install band */
.install {
  padding: 96px 24px;
  text-align: center;
  background: var(--surface-low);
}
.install h2 {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 36px;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.install p {
  font-size: 17px;
  color: var(--on-surface-variant);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.install .btn-lg { margin-bottom: 18px; }

/* FAQ */
.faq {
  padding: 72px 24px 96px;
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--outline-variant);
  padding: 18px 0;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 17px;
  padding: 4px 0;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p {
  margin-top: 10px;
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}
.chev {
  transition: transform 160ms ease;
  color: var(--on-surface-variant);
}
.faq-item[open] .chev { transform: rotate(180deg); }

/* Footer */
.footer {
  border-top: 1px solid var(--outline-variant);
  padding: 28px 24px;
  text-align: center;
  font-size: 13px;
  color: var(--on-surface-variant);
}

/* Documentation page */
.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.doc-head { margin-bottom: 48px; }
.eyebrow {
  font-family: var(--brand-font);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}
.doc-head h1 {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 42px;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin-bottom: 14px;
}
.doc-lead {
  font-size: 18px;
  color: var(--on-surface-variant);
  max-width: 580px;
}
.doc-section { margin-bottom: 48px; }
.doc-section:last-of-type { margin-bottom: 32px; }
.doc-section h2 {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 24px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--outline-variant);
}
.doc-section p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--on-surface);
  margin-bottom: 12px;
}
.doc-section p:last-child { margin-bottom: 0; }

.steps {
  list-style: none;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--outline-variant);
}
.steps li:last-child { border-bottom: none; }
.steps li::before {
  content: counter(step);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #d3e3fd;
  color: #041e49;
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-body { flex: 1; min-width: 0; }
.step-title {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 16px;
  margin-bottom: 6px;
}
.steps p {
  font-size: 15px;
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.ratings {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.rating {
  padding: 20px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--corner-lg);
  background: var(--surface);
}
.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--brand-font);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.rating-badge span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}
.rating-badge.high { color: var(--success); }
.rating-badge.medium { color: var(--warning); }
.rating-badge.low { color: var(--error); }
.rating-score {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 6px;
}
.rating-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--on-surface-variant);
}

.doc-signals {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.doc-signal {
  display: flex;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--corner-md);
  background: var(--surface);
}
.doc-sig-icon {
  flex-shrink: 0;
  color: var(--on-surface-variant);
  font-size: 22px !important;
}
.doc-sig-label {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 15px;
  margin-bottom: 4px;
}
.doc-signal p {
  font-size: 14px;
  line-height: 1.55;
  color: var(--on-surface-variant);
}

.callout {
  display: flex;
  gap: 12px;
  padding: 18px;
  background: var(--surface-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--corner-md);
  margin-top: 20px;
}
.callout-icon {
  color: var(--primary);
  font-size: 22px !important;
  flex-shrink: 0;
}
.callout div {
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-surface);
}
.callout strong {
  font-family: var(--brand-font);
  font-weight: 500;
}

.doc-footnote {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--outline-variant);
  font-size: 13px;
  color: var(--on-surface-variant);
  letter-spacing: 0.3px;
}

/* Install page extras */
.install-steps li { padding: 24px 0; }
.install-diagram {
  margin: 16px 0 4px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.install-diagram svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--corner-md);
  border: 1px solid var(--outline-variant);
  background: #f1f3f4;
}
.install-cap {
  font-size: 13px;
  color: var(--on-surface-variant);
  line-height: 1.5;
  text-align: center;
}
.inline-msi {
  font-family: 'Material Symbols Outlined';
  font-size: 16px !important;
  vertical-align: -3px;
  color: var(--on-surface-variant);
}
.text-link {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.text-link:hover { text-decoration: none; }

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 640px;
}
.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-row label {
  font-family: var(--brand-font);
  font-weight: 500;
  font-size: 14px;
  color: var(--on-surface-variant);
}
.form-row input,
.form-row textarea {
  font: inherit;
  color: var(--on-surface);
  background: var(--surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--corner-md);
  padding: 12px 14px;
  width: 100%;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.form-row textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.5;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(11, 87, 208, 0.15);
}
.form-hp {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}
.form-status {
  font-size: 14px;
  color: var(--on-surface-variant);
}
.form-status.is-success { color: var(--on-success-container); }
.form-status.is-error { color: var(--error); }

/* Responsive */
@media (max-width: 760px) {
  .wordmark { font-size: 44px; }
  .tagline { font-size: 19px; }
  .subhead { font-size: 16px; }
  .hero { padding: 64px 20px 48px; }
  .section-head h2 { font-size: 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .breakdown { grid-template-columns: 1fr; }
  .install h2 { font-size: 28px; }
  .nav-cta { padding: 8px 16px; font-size: 13px; }
  .doc { padding: 40px 20px 64px; }
  .doc-head h1 { font-size: 32px; }
  .doc-lead { font-size: 16px; }
  .ratings { grid-template-columns: 1fr; }
  .doc-signals { grid-template-columns: 1fr; }
}