:root {
  color-scheme: light;
  --page: #f7f8ff;
  --ink: #15223b;
  --muted: #647896;
  --accent: #5554ff;
  --accent-hover: #4241de;
  --soft: #ebeeff;
  --border: #dce3f5;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: Arial, "Helvetica Neue", sans-serif; font-size: 15px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.container { width: min(1160px, calc(100% - 48px)); margin-inline: auto; }
.icon-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 20px; height: 20px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.site-header { border-bottom: 1px solid var(--border); }
.header-inner { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 25px; font-weight: 500; letter-spacing: -1px; white-space: nowrap; }
.brand .icon { width: 23px; height: 23px; }
.main-nav { display: flex; gap: 26px; color: var(--muted); font-size: 14px; }
.main-nav a:hover, .auth-links a:hover, .back-link:hover { color: var(--accent); }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 14px; min-height: 52px; padding: 13px 21px; border: 1px solid transparent; border-radius: 12px; font-weight: 500; line-height: 1.5; cursor: pointer; transition: background-color .15s, border-color .15s, transform .15s; }
.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; background: var(--accent); }
.button-primary:hover { background: var(--accent-hover); }
.button-secondary { background: #fff; border-color: var(--border); }
.button-secondary:hover { border-color: var(--accent); }
.hero { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 68px; padding: 86px 0 94px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 24px; padding: 7px 13px; border-radius: 30px; background: var(--soft); color: var(--accent); font-size: 12px; letter-spacing: .7px; line-height: 1.5; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 24px; font-size: clamp(38px, 4.2vw, 58px); font-weight: 500; line-height: 1.15; letter-spacing: -2px; }
h1 span, .auth-intro h1 span { color: var(--accent); }
.hero-description { max-width: 450px; margin-bottom: 30px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-actions .button { padding-inline: 18px; gap: 10px; font-size: 14px; }
.trust-list { display: flex; flex-wrap: wrap; gap: 18px; padding: 0; margin: 20px 0 0; list-style: none; color: var(--muted); font-size: 12px; }
.trust-list li { display: flex; align-items: center; gap: 7px; }
.trust-list .icon { width: 17px; height: 17px; }
.review-preview { overflow: hidden; border: 1px solid var(--border); border-radius: 18px; background: #fff; box-shadow: 0 22px 48px rgba(36, 49, 84, .10); font-size: 13px; }
.preview-footer { display: flex; gap: 20px; padding: 12px 18px; border-top: 1px solid var(--border); font-size: 11px; color: var(--muted); }
.preview-footer a { margin-left: auto; color: var(--accent); }
.preview-footer a:hover { text-decoration: underline; }
.demo-workspace { padding: 12px; background: #f6f7fa; }
.demo-guide { padding: 5px 3px 10px; }
.demo-guide-tabs { display: flex; gap: 5px; }
.demo-guide-tabs button, .demo-guide-controls button { border: 1px solid var(--border); border-radius: 7px; background: #fff; color: var(--ink); cursor: pointer; padding: 6px 8px; font-size: 11px; transition: background-color .2s, border-color .2s; }
.demo-guide-tabs button[aria-current="step"], .demo-guide-tabs button:hover, .demo-guide-controls button:hover { background: var(--soft); border-color: var(--accent); color: var(--accent); }
.demo-guide p { margin: 7px 0 0; color: var(--muted); font-size: 11px; }
.demo-guide-controls { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-size: 11px; }
.demo-guide-controls button:disabled { opacity: .45; cursor: default; }
.demo-guide-controls button:last-child { margin-left: auto; }
.demo-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; padding: 7px; border: 1px solid var(--border); border-bottom: 0; border-radius: 9px 9px 0 0; background: #fff; font-size: 10px; }
.demo-toolbar button, .demo-tool-active { padding: 5px 7px; border: 1px solid transparent; border-radius: 5px; line-height: 1.5; }
.demo-toolbar button { color: #576174; background: #fff; cursor: pointer; }
.demo-toolbar button:hover { color: var(--accent); background: var(--soft); }
.demo-toolbar button[aria-pressed="true"], .demo-tool-active { color: var(--accent); background: var(--soft); border-color: #d3d7ff; }
.demo-zoom-tools { display: flex; margin-left: auto; }
.demo-stage { position: relative; overflow: hidden; border-radius: 0 0 9px 9px; background: #101219; }
#demo-canvas { display: block; width: 100%; aspect-ratio: 1242 / 375; touch-action: pan-y; }
.demo-annotator-box, .demo-yolo-box { fill: none; vector-effect: non-scaling-stroke; stroke-width: 1.5px; }
.demo-annotator-box, .demo-yolo-box { transition: stroke-width .2s, opacity .2s; }
.demo-annotator-box { stroke: #ff4545; fill: rgba(255, 69, 69, .05); cursor: grab; touch-action: none; }
.demo-annotator-box:active { cursor: grabbing; }
.demo-annotator-box:focus-visible { outline: none; stroke-width: 3px; }
.demo-yolo-box { stroke: #42df65; stroke-dasharray: 4 3; }
.demo-yolo-box[role="button"] { cursor: pointer; }
#demo-canvas[data-selected="annotator"] .demo-annotator-box, #demo-canvas[data-selected="yolo"] .demo-yolo-box { stroke-width: 3px; }
#demo-canvas[data-demo-step="0"] .demo-annotator-box { animation: demo-appear .3s ease-out both; }
@keyframes demo-appear { from { opacity: .2; } to { opacity: 1; } }
.demo-legend { position: absolute; bottom: 6px; left: 6px; display: flex; gap: 10px; padding: 3px 6px; border-radius: 4px; background: rgba(16, 18, 25, .84); color: #fff; font-size: 9px; pointer-events: none; }
.demo-legend > span { display: inline-flex; align-items: center; gap: 5px; }
.demo-swatch { display: inline-block; width: 12px; height: 8px; border: 1.5px solid; }
.demo-swatch.annotator { border-color: #ff4545; }
.demo-swatch.yolo { border-color: #32c34e; border-style: dashed; }
.demo-hint { margin: 7px 0 10px; color: var(--muted); font-size: 10px; }
.demo-decision { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px; background: #fff; border: 1px solid var(--border); border-radius: 9px; }
.demo-status { display: flex; align-items: center; gap: 6px; font-size: 10px; }
.demo-status > i { width: 7px; height: 7px; flex-shrink: 0; border-radius: 50%; background: #eda900; box-shadow: 0 0 0 3px #fff5d4; }
.demo-status[data-reviewed="true"] > i { background: #26a344; box-shadow: 0 0 0 3px #e3f8e7; }
.demo-decision-buttons { display: flex; flex-wrap: wrap; gap: 6px; margin-left: auto; }
.demo-decision button { display: inline-flex; align-items: center; gap: 5px; padding: 7px 9px; border: 1px solid; border-radius: 6px; font-size: 10px; font-weight: 600; cursor: pointer; }
.demo-use-yolo { color: #248637; background: #f2fff4; border-color: #b4ebbd !important; }
.demo-use-yolo:hover { background: #e3fae7; }
.demo-confirm { color: #fff; background: var(--accent); border-color: var(--accent) !important; }
.demo-confirm:hover { background: var(--accent-hover); }
.demo-decision button[aria-pressed="true"] { box-shadow: 0 0 0 2px #bbc2df; }
.demo-details { margin-top: 10px; padding: 12px; border: 1px solid var(--border); border-radius: 9px; background: #fff; }
.demo-badges { display: flex; gap: 8px; font-size: 10px; }
.demo-badges span { padding: 2px 7px; border-radius: 4px; color: #bc6507; background: #fff6eb; }
.demo-badges span:last-child { color: #a17c16; background: #fff9e9; }
.demo-details p { margin: 8px 0 12px; color: #576174; font-size: 11px; }
.demo-details dl { margin: 0; padding-top: 10px; border-top: 1px solid var(--border); display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; font-size: 11px; }
.demo-details dt { color: var(--muted); }
.demo-details dd { margin: 0; font-weight: 600; }
.demo-confidence { color: #248637; }
.demo-details progress { display: block; width: 100%; height: 7px; margin-top: 4px; accent-color: #32c34e; }
.demo-details progress::-webkit-progress-value { transition: width .25s ease; }
.demo-details progress[hidden] { display: none; }
.section { padding: 42px 0; scroll-margin-top: 20px; }
h2 { margin-bottom: 9px; font-size: 29px; font-weight: 500; line-height: 1.35; letter-spacing: -.8px; }
h3 { margin-bottom: 7px; font-size: 17px; font-weight: 500; line-height: 1.5; }
.section-description, .feature-card p, .workflow p, .faq p, .closing-cta p { color: var(--muted); font-size: 14px; }
.section-description { margin-bottom: 26px; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.feature-card { padding: 22px; background: #fff; border: 1px solid var(--border); border-radius: 12px; text-align: left; font: inherit; color: inherit; cursor: pointer; transition: border-color .2s, box-shadow .2s, transform .2s, opacity .25s; }
.feature-card:hover, .feature-card[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 8px 24px rgba(36,49,84,.09); transform: translateY(-2px); }
.feature-card.reveal-pending { opacity: 0; transform: translateY(12px); }
.feature-card.reveal-visible { opacity: 1; transform: translateY(0); }
.feature-card > .icon { display: block; margin-bottom: 6px; width: 18px; height: 18px; }
.feature-card p { margin-bottom: 0; }
.workflow, .faq { border-top: 1px solid var(--border); }
.workflow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; padding: 0; margin: 30px 0 0; list-style: none; }
.step-label { display: block; color: var(--accent); font-size: 13px; margin-bottom: 14px; }
.workflow p { margin-bottom: 0; }
.faq h2 { margin-bottom: 26px; }
.faq details { border-bottom: 1px solid var(--border); padding: 15px 0; }
.faq summary { cursor: pointer; font-size: 15px; }
.faq summary::marker { color: var(--ink); font-size: 12px; }
.faq p { margin: 12px 0 0; }
.closing-cta { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 30px; border-radius: 16px; background: var(--soft); }
.closing-cta h2 { font-size: 26px; }
.closing-cta p { margin: 14px 0 0; }
.closing-cta .button { flex-shrink: 0; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding-block: 32px; color: var(--muted); font-size: 12px; }
.footer-brand { font-size: 18px; color: var(--ink); }
/* Authentication shares the homepage's typography, colors and spacing. */
.back-link { color: var(--muted); font-size: 14px; }
.auth-layout { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 100px; min-height: calc(100svh - 182px); padding-block: 68px; }
.auth-intro h1 { font-size: clamp(38px, 4vw, 54px); }
.auth-intro .hero-description { font-size: 16px; }
.auth-steps { padding: 0; margin: 32px 0 0; list-style: none; display: grid; gap: 18px; }
.auth-steps li { display: flex; align-items: center; gap: 14px; }
.auth-step-number { display: grid; place-items: center; width: 36px; height: 36px; flex-shrink: 0; border: 1px solid var(--border); border-radius: 10px; background: #fff; font-size: 12px; color: var(--accent); }
.auth-steps p { margin: 0; color: var(--muted); font-size: 13px; }
.auth-steps strong { font-weight: 500; font-size: 15px; }
.auth-card { padding: 36px; border: 1px solid var(--border); border-radius: 20px; background: #fff; box-shadow: 0 18px 50px rgba(36, 49, 84, .07); }
.auth-card .eyebrow { background: none; padding: 0; border-radius: 0; margin-bottom: 12px; }
.auth-card h2 { font-size: 30px; margin-bottom: 8px; }
.auth-description { color: var(--muted); font-size: 14px; margin-bottom: 26px; }
.auth-field { margin-bottom: 18px; }
.auth-field label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 7px; }
.auth-input-wrap { position: relative; }
.auth-input-wrap input { width: 100%; height: 48px; padding: 11px 14px; color: var(--ink); background: #fff; border: 1px solid #ced7eb; border-radius: 8px; outline-offset: 2px; }
.auth-input-wrap input:focus { border-color: var(--accent); }
.auth-input-wrap input:hover:not(:disabled) { border-color: #9ba8d0; }
.auth-input-wrap input:disabled { background: var(--page); color: var(--muted); }
#auth-password { padding-right: 66px; }
.password-toggle { position: absolute; right: 9px; top: 8px; padding: 5px 7px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); font-size: 12px; cursor: pointer; }
.password-toggle:hover { color: var(--accent); background: var(--soft); }
.auth-notice { margin: 0 0 22px; padding: 12px 14px; color: #495993; background: var(--soft); border-radius: 8px; font-size: 13px; overflow-wrap: anywhere; }
.trial-notice { background: #fff7e8; color: #886020; }
.auth-submit { width: 100%; }
.auth-submit:disabled { cursor: default; background: #959ab5; transform: none; }
.auth-error { margin-top: 12px; color: #b43737; font-size: 13px; }
.auth-error:empty { margin: 0; }
.auth-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 20px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; }
.auth-links a { display: flex; flex-direction: column; align-items: center; }
.auth-links a[aria-current="page"] { color: var(--accent); }
.auth-links small { font-size: 10px; color: var(--muted); }
@media (prefers-reduced-motion: no-preference) {
  .hero-copy, .review-preview { animation: demo-appear .3s ease-out both; }
  .review-preview { animation-delay: .12s; }
  .demo-details progress { transition: all .25s ease; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
@media (max-width: 1000px) {
  .hero { gap: 36px; padding-block: 76px; }
  .hero h1 { font-size: 40px; letter-spacing: -1.5px; }
  .hero-description { font-size: 16px; }
  .main-nav { gap: 16px; }
  .trust-list { gap: 12px; }
  .auth-layout { gap: 48px; }
  .auth-card { padding: 28px; }
}
@media (max-width: 760px) {
  .container { width: calc(100% - 36px); }
  .header-inner { min-height: 82px; gap: 16px; flex-wrap: wrap; padding-block: 16px; }
  .brand { font-size: 22px; }
  .header-cta { min-height: 42px; padding: 10px 13px; font-size: 13px; }
  .main-nav { order: 3; width: 100%; justify-content: center; font-size: 13px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 48px 0; }
  .hero-copy { max-width: 540px; }
  .hero h1 { font-size: clamp(38px, 8vw, 48px); }
  .review-preview { width: 100%; max-width: 480px; justify-self: center; }
  .section { padding-block: 32px; }
  h2 { font-size: 25px; }
  .workflow-grid { gap: 24px; }
  .closing-cta { padding: 26px; align-items: flex-start; flex-direction: column; }
  .auth-layout { grid-template-columns: 1fr; gap: 30px; padding-block: 40px; min-height: auto; max-width: 540px; }
  .auth-intro h1 { font-size: 38px; }
  .auth-intro .hero-description { margin-bottom: 0; }
  .auth-steps { gap: 9px; margin-top: 20px; }
  .auth-steps li { align-items: flex-start; }
  .auth-card { padding: 26px; }
  .site-footer { align-items: flex-start; flex-direction: column; gap: 6px; }
}
@media (max-width: 520px) {
  .feature-grid, .workflow-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 20px; }
  .workflow-grid { gap: 26px; }
  .step-label { margin-bottom: 8px; }
  .hero-actions { gap: 10px; }
  .hero-actions .button { padding-inline: 15px; font-size: 14px; }
  .trust-list { font-size: 11px; }
  .demo-details dl { gap: 8px 12px; }
  .demo-toolbar { font-size: 9px; }
  .demo-toolbar button, .demo-tool-active { padding-inline: 5px; }
  .demo-decision-buttons { margin-left: 0; }
  .auth-card { padding: 24px 20px; }
  .back-link { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
  .button:hover { transform: none; }
}