:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #f3f3f5;
  --surface-strong: #e9e9ec;
  --text: #101012;
  --muted: #66666d;
  --line: #d9d9df;
  --accent: #ff9e0a;
  --accent-strong: #ea8d00;
  --accent-label: #a85f00;
  --accent-text: #111113;
  --band: #0a0a0b;
  --band-surface: #171719;
  --band-text: #f7f7f8;
  --band-muted: #aaaab1;
  --success: #2f6f44;
  --error: #a13b37;
  --info: #315e91;
  --radius-sm: 10px;
  --radius-md: 22px;
  --radius-lg: 36px;
  --content: 1240px;
  --reading: 760px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0b0d;
  --surface: #18181b;
  --surface-strong: #242428;
  --text: #f5f5f7;
  --muted: #aaaab1;
  --line: #37373c;
  --accent: #ff9e0a;
  --accent-strong: #ffb236;
  --accent-label: #ffc158;
  --accent-text: #111113;
  --band: #000000;
  --band-surface: #141416;
  --band-text: #ffffff;
  --band-muted: #b6b6bc;
  --success: #80c493;
  --error: #f08f88;
  --info: #8bb7e8;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; overflow-x: hidden; background: var(--bg); color: var(--text); font-size: 17px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: 0.2em; }
button, input, select, textarea { font: inherit; }
button, select, summary, a { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, h4, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p, li { text-wrap: pretty; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; transform: translateY(-150%); padding: 10px 14px; border-radius: 8px; background: var(--text); color: var(--bg); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.site-header { position: sticky; z-index: 100; top: 0; border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent); background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: saturate(160%) blur(18px); }
.header-inner { width: min(calc(100% - 40px), var(--content)); min-height: 72px; margin: 0 auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 10px; width: fit-content; color: var(--text); text-decoration: none; font-weight: 740; letter-spacing: -0.025em; }
.brand img { border-radius: 9px; }
:root[data-theme="dark"] .brand img { filter: invert(1); }
.site-nav { display: flex; justify-content: center; gap: clamp(18px, 3vw, 38px); }
.site-nav a, .footer-nav-group a, .footer-meta a { color: var(--muted); text-decoration: none; font-size: 0.9rem; font-weight: 620; }
.site-nav a:hover, .footer-nav-group a:hover, .footer-meta a:hover { color: var(--text); }
.header-actions { position: relative; display: flex; align-items: center; gap: 8px; }
.language-picker { position: relative; }
.language-trigger, .theme-toggle, .menu-toggle { min-height: 44px; border: 1px solid color-mix(in srgb, var(--line) 82%, transparent); border-radius: 999px; background: color-mix(in srgb, var(--surface) 86%, transparent); color: var(--text); box-shadow: inset 0 1px 0 color-mix(in srgb, #fff 42%, transparent), 0 1px 2px rgba(0, 0, 0, 0.035); font-size: 0.82rem; font-weight: 650; cursor: pointer; transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease; }
:root[data-theme="dark"] .language-trigger, :root[data-theme="dark"] .theme-toggle, :root[data-theme="dark"] .menu-toggle { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.055), 0 1px 2px rgba(0, 0, 0, 0.18); }
.language-trigger:hover, .theme-toggle:hover, .menu-toggle:hover { border-color: color-mix(in srgb, var(--text) 22%, var(--line)); background: color-mix(in srgb, var(--surface-strong) 78%, transparent); }
.language-trigger:active, .theme-toggle:active, .menu-toggle:active { transform: scale(0.975); }
.language-trigger { width: 96px; min-width: 96px; padding: 0; display: inline-flex; align-items: center; justify-content: center; gap: 10px; }
.language-current-code { display: inline; font-weight: 720; letter-spacing: 0.05em; }
.language-chevron, .summary-chevron, .source-loop-hint-icon { width: 18px; height: 18px; flex: 0 0 auto; transition: transform 180ms ease; }
.language-trigger[aria-expanded="true"] .language-chevron { transform: rotate(180deg); }
.language-popover { position: absolute; z-index: 300; top: calc(100% + 10px); right: 0; width: 96px; padding: 6px; border: 1px solid color-mix(in srgb, var(--line) 76%, transparent); border-radius: 26px; background: var(--bg); box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18), 0 6px 22px rgba(0, 0, 0, 0.08); opacity: 0; transform: translateY(-7px) scale(0.985); transform-origin: top right; pointer-events: none; transition: opacity 160ms ease, transform 180ms cubic-bezier(0.2, 0.8, 0.2, 1); }
.language-popover.is-open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.language-option { min-height: 44px; padding: 0 10px; display: flex; align-items: center; justify-content: center; border-radius: 999px; background: color-mix(in srgb, var(--surface) 64%, var(--bg)); color: var(--text); text-decoration: none; font-size: 0.8rem; font-weight: 720; letter-spacing: 0.07em; transition: background-color 140ms ease, transform 140ms ease; }
.language-option + .language-option { margin-top: 4px; }
.language-option:hover, .language-option:focus-visible { background: var(--surface); }
.language-option:active { transform: scale(0.985); }
.language-option > span { width: 100%; text-align: center; }
.language-option.is-current { background: color-mix(in srgb, var(--accent) 10%, var(--surface)); }
.theme-toggle { width: 44px; min-width: 44px; padding: 0; display: inline-flex; align-items: center; justify-content: center; gap: 0; }
.theme-toggle [data-theme-label] { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.theme-icon { position: relative; width: 18px; height: 18px; flex: 0 0 auto; }
.theme-icon svg { position: absolute; inset: 0; width: 18px; height: 18px; transition: opacity 180ms ease, transform 220ms ease; }
.theme-icon-moon { opacity: 0; transform: rotate(-16deg) scale(0.78); }
:root[data-theme="dark"] .theme-icon-sun { opacity: 0; transform: rotate(28deg) scale(0.78); }
:root[data-theme="dark"] .theme-icon-moon { opacity: 1; transform: rotate(0) scale(1); }
.menu-toggle { width: 44px; min-width: 44px; padding: 0; justify-content: center; }
.menu-icon { position: relative; width: 20px; height: 20px; flex: 0 0 auto; }
.menu-icon svg { position: absolute; inset: 0; width: 20px; height: 20px; transition: opacity 160ms ease, transform 200ms ease; }
.menu-icon-close { opacity: 0; transform: rotate(-45deg) scale(0.76); }
.menu-toggle[aria-expanded="true"] .menu-icon-open { opacity: 0; transform: rotate(45deg) scale(0.76); }
.menu-toggle[aria-expanded="true"] .menu-icon-close { opacity: 1; transform: rotate(0) scale(1); }
.menu-toggle { display: none; }

.hero { width: min(calc(100% - 48px), var(--content)); min-height: min(880px, calc(100svh - 72px)); margin: 0 auto; padding: 82px 0 66px; display: grid; grid-template-columns: minmax(0, 0.94fr) minmax(470px, 1.06fr); align-items: center; gap: clamp(28px, 5vw, 80px); }
.hero-copy { position: relative; z-index: 2; }
.hero-eyebrow, .section-label { margin-bottom: 18px; color: var(--accent-label); font-size: 0.76rem; font-weight: 780; letter-spacing: 0.13em; text-transform: uppercase; }
.hero h1 { max-width: 780px; margin-bottom: 28px; font-size: clamp(3.6rem, 6.4vw, 6.6rem); line-height: 0.94; letter-spacing: -0.067em; font-weight: 770; }
.hero-copy > p:not(.hero-eyebrow) { max-width: 650px; margin-bottom: 34px; color: var(--muted); font-size: clamp(1.08rem, 1.55vw, 1.34rem); line-height: 1.5; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; }
.primary-button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 22px; border: 0; border-radius: 999px; background: var(--accent); color: var(--accent-text); text-decoration: none; font-weight: 720; cursor: pointer; transition: transform 160ms ease, background-color 160ms ease; }
.primary-button:hover { transform: translateY(-1px); background: var(--accent-strong); }
.text-link { color: var(--text); font-weight: 700; text-decoration-thickness: 1px; }
.hero-media { margin: 0; transform: translateY(3%); }
.hero-media img { width: 100%; filter: drop-shadow(0 34px 48px rgba(20, 20, 24, 0.12)); }
:root[data-theme="dark"] .hero-media img { filter: drop-shadow(0 34px 52px rgba(0, 0, 0, 0.45)); }

.flow-section { padding: clamp(88px, 10vw, 140px) max(24px, calc((100vw - var(--content)) / 2)); background: var(--band); color: var(--band-text); }
.section-intro { max-width: 980px; margin-bottom: clamp(54px, 7vw, 90px); }
.section-intro h2 { max-width: 900px; margin-bottom: 24px; font-size: clamp(3.1rem, 6.6vw, 6.7rem); line-height: 0.95; letter-spacing: -0.06em; }
.section-intro p { max-width: 700px; color: var(--band-muted); font-size: 1.18rem; }
.source-loop { position: relative; aspect-ratio: 5 / 1; margin: 0 0 14px; overflow: hidden; }
.source-loop img { position: absolute; inset: 0 auto auto 0; width: 100%; max-width: none; transform: translateY(-42%); }
.source-loop-hint { display: none; }
.flow-list { container-type: inline-size; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; }
.flow-list li, .flow-list li + li { min-width: 0; padding: 12px clamp(14px, 2vw, 28px) 0; text-align: center; }
.flow-list li:nth-child(1) { transform: translateX(2.6cqw); }
.flow-list li:nth-child(2) { transform: translateX(2.1cqw); }
.flow-list li:nth-child(3) { transform: translateX(0.5cqw); }
.flow-list li:nth-child(4) { transform: translateX(-1.6cqw); }
.flow-list h3 { margin-bottom: 9px; color: var(--accent); font-size: clamp(1.4rem, 2.2vw, 2.1rem); letter-spacing: -0.035em; }
.flow-list p { max-width: 260px; margin: 0 auto; color: var(--band-muted); font-size: 0.92rem; }

.source-chain { width: min(calc(100% - 48px), var(--content)); margin: 0 auto; padding: clamp(100px, 13vw, 180px) 0; }
.source-chain-copy { max-width: 900px; margin-bottom: clamp(60px, 8vw, 100px); }
.source-chain-copy h2, .use-cases-heading h2, .simulator-heading h2 { margin-bottom: 24px; font-size: clamp(3rem, 5.9vw, 6.1rem); line-height: 0.96; letter-spacing: -0.058em; }
.source-chain-copy > p:not(.section-label), .use-cases-heading > p:not(.section-label), .simulator-heading > p:not(.section-label) { max-width: 720px; color: var(--muted); font-size: 1.17rem; }
.source-chain ol { margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; border-top: 1px solid var(--line); }
.source-chain li { min-height: 260px; padding: 20px 20px 0 0; border-right: 1px solid var(--line); }
.source-chain li + li { padding-left: 20px; }
.source-chain li:last-child { border-right: 0; }
.chain-index, .case-index { display: block; margin-bottom: 58px; color: var(--muted); font-size: 0.76rem; font-variant-numeric: tabular-nums; }
.source-chain h3 { margin-bottom: 10px; font-size: 1.28rem; letter-spacing: -0.025em; }
.source-chain li p { margin-bottom: 0; color: var(--muted); font-size: 0.9rem; }

.feature-stories { width: 100%; }
.feature-story { min-height: 900px; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); align-items: center; gap: clamp(44px, 7vw, 112px); padding: clamp(90px, 10vw, 142px) max(24px, calc((100vw - var(--content)) / 2)); border-top: 1px solid var(--line); }
.feature-story-read { background: var(--band); color: var(--band-text); border-top-color: #27272b; }
.feature-story-write { background: var(--bg); }
.feature-story-network { background: var(--surface); }
.feature-copy { max-width: 600px; }
.feature-copy h2 { margin-bottom: 24px; font-size: clamp(2.9rem, 5.1vw, 5.2rem); line-height: 0.98; letter-spacing: -0.057em; }
.feature-copy > p:not(.section-label) { color: var(--muted); font-size: 1.14rem; }
.feature-story-read .feature-copy > p:not(.section-label), .feature-story-read .feature-copy li { color: var(--band-muted); }
.feature-copy ul { margin: 34px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-story-read .feature-copy ul { border-color: #3a3a3f; }
.feature-copy li { padding: 14px 0; border-bottom: 1px solid var(--line); font-weight: 570; }
.feature-story-read .feature-copy li { border-color: #3a3a3f; }
.doodle-frame { width: min(100%, 560px); aspect-ratio: 3 / 4; justify-self: end; margin: 0; overflow: hidden; border: 1px solid #2f2f34; border-radius: clamp(24px, 3vw, 38px); background: #19191b; box-shadow: 0 24px 64px rgba(0, 0, 0, 0.12); }
.doodle-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }

.use-cases { padding: clamp(100px, 12vw, 170px) max(24px, calc((100vw - var(--content)) / 2)); background: var(--band); color: var(--band-text); }
.use-cases-heading { max-width: 950px; margin-bottom: clamp(58px, 8vw, 100px); }
.use-cases-heading > p:not(.section-label) { color: var(--band-muted); }
.use-case-rail { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #3a3a3f; }
.use-case-rail article { min-height: 300px; padding: 22px 26px 0 0; border-right: 1px solid #3a3a3f; }
.use-case-rail article + article { padding-left: 26px; }
.use-case-rail article:last-child { border-right: 0; }
.use-case-rail h3 { margin-bottom: 14px; font-size: clamp(1.4rem, 2vw, 2rem); line-height: 1.08; letter-spacing: -0.035em; }
.use-case-rail p { margin-bottom: 0; color: var(--band-muted); font-size: 0.92rem; }

.simulator-section { padding: clamp(100px, 12vw, 170px) max(24px, calc((100vw - var(--content)) / 2)); background: var(--surface); }
.simulator-heading, .simulator-shell { width: min(100%, 1040px); margin-inline: auto; }
.simulator-heading { margin-bottom: clamp(58px, 8vw, 96px); text-align: center; }
.simulator-heading > p:not(.section-label) { margin-inline: auto; }
.simulator-shell { --sim-bg: #1c1c1f; --sim-card: #242426; --sim-control: #39383d; --sim-selected: #75757b; --sim-divider: #333333; --sim-text: #ffffff; --sim-muted: #b3b3b3; display: grid; grid-template-columns: minmax(420px, 0.85fr) minmax(0, 1fr); align-items: stretch; gap: 15px; padding: 15px; border-radius: var(--radius-lg); background: var(--sim-bg); color: var(--sim-text); box-shadow: 0 28px 80px rgba(0, 0, 0, 0.19); transition: background-color 200ms ease-in-out, color 200ms ease-in-out; }
.simulator-shell.sim-theme-light { --sim-bg: #fafafa; --sim-card: #ffffff; --sim-control: #ededf0; --sim-selected: #ffffff; --sim-divider: #e6e6e6; --sim-text: #000000; --sim-muted: #666666; }
.appearance-panel, .sim-preview { border-radius: 10px; transition: background-color 200ms ease-in-out, color 200ms ease-in-out; }
.appearance-panel { container-type: inline-size; overflow: hidden; background: var(--sim-card); }
.appearance-panel h3 { min-height: 52px; margin: 0; padding: 10px 15px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--sim-divider); font-size: 1.25rem; line-height: 1.2; letter-spacing: -0.025em; }
.appearance-panel h3 .sim-icon { width: 20px; height: 20px; }
.appearance-group { margin: 15px 15px 0; }
.appearance-group + .appearance-group { margin-top: 16px; margin-bottom: 15px; }
.appearance-group > p { margin-bottom: 8px; font-size: 1rem; font-weight: 600; }
.sim-segmented { min-height: 32px; display: grid; grid-template-columns: repeat(3, 1fr); padding: 2px; border-radius: 9px; background: var(--sim-control); }
.sim-segmented button { min-height: 28px; padding: 0 8px; border: 0; border-radius: 7px; background: transparent; color: var(--sim-text); cursor: pointer; transition: background-color 200ms ease-in-out, box-shadow 200ms ease-in-out; }
.sim-segmented button:hover:not(.is-selected) { background: color-mix(in srgb, var(--sim-selected) 46%, transparent); }
.sim-segmented button.is-selected { background: var(--sim-selected); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.24); }
.sim-swatches { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; }
.sim-swatch { position: relative; min-width: 0; height: clamp(40px, 10cqw, 56px); padding: 0; border: 0; border-radius: 6px; background: var(--swatch); cursor: pointer; transition: transform 200ms ease-in-out, box-shadow 200ms ease-in-out; }
.sim-swatch:hover { transform: translateY(-1px); }
.sim-swatch:active { transform: scale(0.97); }
.sim-swatch-check { position: absolute; inset: 6px; width: 28px; height: 28px; margin: auto; color: #ffffff; opacity: 0; filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.3)); transition: opacity 200ms ease-in-out; }
.sim-swatch.needs-dark-check .sim-swatch-check { color: #1e293b; }
.sim-swatch.is-selected { box-shadow: inset 0 0 0 3px #ffffff; }
.sim-swatch.is-selected .sim-swatch-check { opacity: 1; }
.sim-swatch:focus-visible, .sim-segmented button:focus-visible { outline: 0; }
:root[data-input-modality="keyboard"] .sim-swatch:focus, :root[data-input-modality="keyboard"] .sim-segmented button:focus { outline: 3px solid var(--sim-text); outline-offset: 3px; }
.sim-preview { padding: 15px; display: grid; grid-template-columns: 1fr 1fr; gap: 15px; background: var(--sim-bg); }
.sim-module { min-height: 220px; margin: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 24px 16px; border-radius: 14px; background: var(--sim-card); text-align: center; }
.sim-module h4 { margin: 20px 0 5px; font-size: clamp(1.2rem, 1.8vw, 1.7rem); letter-spacing: -0.03em; }
.sim-module p { margin: 0; color: var(--sim-muted); }
.sim-icon { display: inline-block; width: 48px; height: 48px; flex: 0 0 auto; background: var(--sim-accent); -webkit-mask-image: var(--sim-icon); mask-image: var(--sim-icon); -webkit-mask-position: center; mask-position: center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-size: contain; mask-size: contain; transition: background-color 160ms ease; }
.sim-module .sim-icon { width: 84px; height: 84px; }

.access-section { width: min(calc(100% - 48px), var(--content)); margin: 0 auto; padding: clamp(100px, 13vw, 170px) 0; display: grid; grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr); gap: clamp(50px, 8vw, 120px); align-items: start; }
.access-copy { position: sticky; top: 110px; }
.access-copy h2 { margin-bottom: 24px; font-size: clamp(3rem, 5.5vw, 5.8rem); line-height: 0.98; letter-spacing: -0.058em; }
.access-copy p { color: var(--muted); font-size: 1.16rem; }
.access-form { padding: clamp(28px, 5vw, 54px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.access-form label > span, .access-form legend { display: block; margin-bottom: 8px; color: var(--text); font-size: 0.9rem; font-weight: 700; }
.access-form input[type="email"], .access-form input[type="text"], .access-form textarea { width: 100%; min-height: 48px; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); color: var(--text); transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease; }
.access-form input[type="email"]:focus, .access-form input[type="text"]:focus, .access-form textarea:focus { border-color: color-mix(in srgb, var(--accent) 70%, var(--line)); outline: 0; box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent); }
.access-form textarea { resize: vertical; }
.survey-details { margin: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.survey-details summary { min-height: 58px; padding: 0 4px; display: flex; align-items: center; justify-content: space-between; gap: 18px; cursor: pointer; font-weight: 700; list-style: none; }
.survey-details summary::-webkit-details-marker { display: none; }
.survey-details summary:hover { color: color-mix(in srgb, var(--text) 82%, var(--accent)); }
.survey-details[open] .summary-chevron { transform: rotate(180deg); }
.survey-content { padding: 6px 0 26px; }
.access-form fieldset { margin: 0 0 24px; padding: 0; border: 0; }
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.choice-row { display: flex; gap: 10px; flex-wrap: wrap; }
.check-option, .radio-option { min-height: 44px; display: flex !important; align-items: center; gap: 9px; padding: 9px 11px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); cursor: pointer; transition: border-color 140ms ease, background-color 140ms ease, transform 140ms ease; }
.check-option:hover, .radio-option:hover { border-color: color-mix(in srgb, var(--text) 22%, var(--line)); background: color-mix(in srgb, var(--surface-strong) 48%, var(--bg)); }
.check-option:active, .radio-option:active { transform: scale(0.99); }
.check-option input, .radio-option input { accent-color: var(--accent-strong); }
.check-option span, .radio-option span { margin: 0 !important; font-weight: 560 !important; }
.form-submit { width: 100%; }
.form-privacy { margin: 16px 0 0; color: var(--muted); font-size: 0.78rem; }
.form-feedback { display: none; margin: 0 0 16px; padding: 11px 13px; border-radius: var(--radius-sm); font-size: 0.88rem; }
.form-feedback.is-visible { display: block; }
.form-feedback.is-success { color: var(--success); background: color-mix(in srgb, var(--success) 12%, transparent); }
.form-feedback.is-error { color: var(--error); background: color-mix(in srgb, var(--error) 12%, transparent); }
.form-feedback.is-info { color: var(--info); background: color-mix(in srgb, var(--info) 12%, transparent); }
.turnstile-slot { margin-bottom: 16px; }
.turnstile-status { color: var(--muted); font-size: 0.82rem; }
.honeypot { position: absolute; left: -9999px; }

.site-footer { border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent); background: color-mix(in srgb, var(--surface) 72%, var(--bg)); padding: clamp(58px, 7vw, 86px) max(24px, calc((100vw - var(--content)) / 2)) 24px; }
.footer-inner { display: grid; grid-template-columns: minmax(280px, 1.05fr) minmax(0, 1.95fr); gap: clamp(54px, 8vw, 110px); }
.footer-brand .brand { font-size: 1.18rem; }
.footer-brand p { max-width: 360px; margin: 20px 0 0; color: var(--muted); font-size: 0.98rem; }
.footer-navigation { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(24px, 3vw, 52px); }
.footer-nav-group { min-width: 0; }
.footer-nav-group h2 { margin: 0 0 20px; color: var(--muted); font-size: 0.76rem; font-weight: 760; letter-spacing: 0.08em; text-transform: uppercase; }
.footer-nav-group a { width: fit-content; display: block; margin: 0 0 12px; color: var(--text); font-size: 0.96rem; font-weight: 650; line-height: 1.35; transition: color 150ms ease, transform 150ms ease; }
.footer-nav-group a:hover { color: color-mix(in srgb, var(--text) 72%, var(--accent)); transform: translateX(2px); }
.footer-social-actions { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-nav-group .footer-social-button { width: 44px; height: 44px; margin: 0; display: inline-flex; align-items: center; justify-content: center; border: 1px solid color-mix(in srgb, var(--line) 86%, transparent); border-radius: 999px; background: var(--bg); color: var(--text); transition: color 150ms ease, border-color 150ms ease, background 150ms ease, transform 150ms ease; }
.footer-nav-group .footer-social-button:hover { color: var(--accent-strong); border-color: color-mix(in srgb, var(--accent-strong) 46%, var(--line)); background: color-mix(in srgb, var(--accent-strong) 8%, var(--bg)); transform: translateY(-2px); }
.footer-nav-group .footer-social-button:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent-strong) 54%, transparent); outline-offset: 3px; }
.footer-icon { width: 20px; height: 20px; display: inline-block; flex: 0 0 auto; background: currentColor; -webkit-mask: var(--footer-icon) center / contain no-repeat; mask: var(--footer-icon) center / contain no-repeat; }
.footer-icon-instagram { --footer-icon: url("./icons/instagram.svg"); }
.footer-icon-x { --footer-icon: url("./icons/twitter-x.svg"); }
.footer-meta { margin-top: clamp(52px, 7vw, 76px); padding-top: 20px; border-top: 1px solid color-mix(in srgb, var(--line) 78%, transparent); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.copyright { margin: 0; color: var(--muted); font-size: 0.78rem; }
.footer-meta a { font-size: 0.78rem; }

.document-main { width: min(calc(100% - 48px), var(--content)); margin: 0 auto; padding: clamp(62px, 7vw, 96px) 0 clamp(100px, 12vw, 154px); }
.document-hero { max-width: 1000px; margin-bottom: clamp(58px, 7vw, 86px); }
.document-back { width: fit-content; display: inline-flex; align-items: center; margin-bottom: clamp(46px, 6vw, 72px); color: var(--muted); text-decoration: none; font-size: 0.86rem; font-weight: 660; }
.document-back::before { margin-right: 8px; content: "←"; }
.document-back:hover { color: var(--text); }
.document-eyebrow { margin-bottom: 18px; color: var(--accent-label); font-size: 0.76rem; font-weight: 780; letter-spacing: 0.13em; text-transform: uppercase; }
.document-hero h1 { max-width: 920px; margin: 0 0 24px; font-size: clamp(3.4rem, 6.9vw, 6.8rem); line-height: 0.95; letter-spacing: -0.062em; }
.document-lede { max-width: 800px; color: var(--muted); font-size: clamp(1.08rem, 1.7vw, 1.3rem); }
.document-updated { margin: 26px 0 0; color: var(--muted); font-size: 0.8rem; }
.document-layout { display: grid; grid-template-columns: minmax(210px, 250px) minmax(0, var(--reading)); align-items: start; gap: clamp(56px, 8vw, 110px); }
.document-sidebar { position: sticky; top: 110px; }
.document-navigation { padding: 22px; border: 1px solid color-mix(in srgb, var(--line) 80%, transparent); border-radius: var(--radius-md); background: color-mix(in srgb, var(--surface) 76%, var(--bg)); }
.document-nav-group + .document-nav-group { margin-top: 28px; padding-top: 26px; border-top: 1px solid color-mix(in srgb, var(--line) 78%, transparent); }
.document-nav-group h2 { margin: 0 0 10px; color: var(--muted); font-size: 0.72rem; font-weight: 760; letter-spacing: 0.08em; text-transform: uppercase; }
.document-nav-link { min-height: 38px; margin: 2px -10px; padding: 8px 10px; display: flex; align-items: center; border-radius: 10px; color: var(--muted); text-decoration: none; font-size: 0.86rem; font-weight: 620; line-height: 1.3; }
.document-nav-link:hover { color: var(--text); background: color-mix(in srgb, var(--surface-strong) 66%, transparent); }
.document-nav-link.is-current { color: var(--text); background: var(--surface-strong); box-shadow: inset 3px 0 0 var(--accent); }
.document-content { max-width: var(--reading); }
.document-content section { scroll-margin-top: 108px; padding: 42px 0; border-top: 1px solid color-mix(in srgb, var(--line) 88%, transparent); }
.document-content section:first-child { padding-top: 0; border-top: 0; }
.document-content h2 { margin-bottom: 18px; font-size: clamp(1.7rem, 3vw, 2.35rem); line-height: 1.05; letter-spacing: -0.035em; }
.document-content p, .document-content li { color: var(--muted); }
.document-content p { margin-bottom: 1em; }
.document-content ul { margin: 0; padding-left: 1.25rem; }
.document-content li + li { margin-top: 0.45em; }
.document-content a { color: var(--text); font-weight: 620; }
.not-found { min-height: 100svh; width: min(calc(100% - 48px), 780px); margin: 0 auto; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; }
.not-found h1 { margin: 60px 0 22px; font-size: clamp(3.5rem, 9vw, 7rem); line-height: 0.95; letter-spacing: -0.06em; }
.not-found > p { color: var(--muted); font-size: 1.2rem; }
.not-found-actions { display: flex; align-items: center; gap: 18px; margin-top: 22px; }

@media (min-width: 981px) {
  .feature-story-write .doodle-frame { order: -1; justify-self: start; }
  .feature-story-write .feature-copy { justify-self: end; }
  .appearance-panel { display: flex; flex-direction: column; margin-block: 15px; }
  .appearance-panel h3 { position: relative; min-height: 72px; padding: 14px 18px; gap: 16px; border-bottom: 0; font-size: 2rem; }
  .appearance-panel h3::after { position: absolute; right: 18px; bottom: 0; left: 18px; height: 1px; background: var(--sim-divider); content: ""; }
  .appearance-panel h3 .sim-icon { width: 44px; height: 44px; }
  .appearance-group { margin: 0 18px; }
  .appearance-group:first-of-type { margin-top: auto; }
  .appearance-group + .appearance-group { margin-top: 36px; margin-bottom: auto; }
  .appearance-group > p { margin-bottom: 10px; font-size: 1.05rem; }
  .sim-segmented { min-height: 58px; padding: 3px; border-radius: 999px; }
  .sim-segmented button { min-height: 52px; border-radius: 999px; font-size: 1.08rem; }
}

@media (max-width: 980px) {
  .header-inner { grid-template-columns: auto 1fr; }
  .site-nav { position: absolute; top: calc(100% + 9px); left: 12px; right: 12px; padding: 8px; border: 1px solid color-mix(in srgb, var(--line) 76%, transparent); border-radius: 22px; background: color-mix(in srgb, var(--bg) 99%, transparent); box-shadow: 0 24px 70px rgba(0, 0, 0, 0.18), 0 6px 22px rgba(0, 0, 0, 0.08); backdrop-filter: saturate(180%) blur(28px); flex-direction: column; align-items: stretch; gap: 2px; opacity: 0; transform: translateY(-8px) scale(0.988); transform-origin: top center; visibility: hidden; pointer-events: none; transition: opacity 160ms ease, transform 180ms cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0s linear 180ms; }
  .site-nav.is-open { opacity: 1; transform: translateY(0) scale(1); visibility: visible; pointer-events: auto; transition-delay: 0s; }
  .site-nav a { min-height: 50px; padding: 0 14px; display: flex; align-items: center; border-radius: 14px; color: var(--text); font-size: 1rem; font-weight: 650; }
  .site-nav a:hover, .site-nav a:focus-visible { background: var(--surface); }
  .header-actions { justify-self: end; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .hero { min-height: auto; padding-top: 68px; grid-template-columns: 1fr; }
  .hero-copy { max-width: 820px; }
  .hero-media { width: min(100%, 720px); justify-self: center; transform: none; }
  .source-chain ol { grid-template-columns: repeat(3, 1fr); }
  .source-chain li:nth-child(3) { border-right: 0; }
  .source-chain li:nth-child(n+4) { border-top: 1px solid var(--line); }
  .feature-story { grid-template-columns: 1fr; min-height: 0; }
  .feature-copy { max-width: 780px; }
  .doodle-frame { width: min(100%, 560px); justify-self: start; }
  .use-case-rail { grid-template-columns: repeat(2, 1fr); }
  .use-case-rail article:nth-child(2) { border-right: 0; }
  .use-case-rail article:nth-child(n+3) { border-top: 1px solid #3a3a3f; }
  .simulator-shell { grid-template-columns: 1fr; }
  .access-section { grid-template-columns: 1fr; }
  .access-copy { position: static; max-width: 780px; }
  .footer-inner { grid-template-columns: 1fr; gap: 48px; }
  .footer-brand p { max-width: 520px; }
  .document-layout { grid-template-columns: 1fr; gap: 56px; }
  .document-sidebar { position: static; }
  .document-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
  .document-nav-group + .document-nav-group { margin: 0; padding: 0 0 0 28px; border-top: 0; border-left: 1px solid color-mix(in srgb, var(--line) 78%, transparent); }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .header-inner { width: min(calc(100% - 24px), var(--content)); min-height: 64px; gap: 8px; }
  .header-actions { gap: 6px; }
  .language-popover { background: var(--bg); }
  .theme-toggle { min-width: 44px; width: 44px; padding: 0; }
  .menu-toggle { width: 44px; min-width: 44px; padding: 0; }
  .hero, .source-chain, .access-section, .document-main { width: min(calc(100% - 28px), var(--content)); }
  .hero { padding: 52px 0 64px; gap: 32px; }
  .hero h1 { font-size: clamp(3rem, 14vw, 4.8rem); }
  .hero-copy > p:not(.hero-eyebrow) { font-size: 1.04rem; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .flow-section, .feature-story, .use-cases, .simulator-section { padding-left: 18px; padding-right: 18px; }
  .flow-visual { width: 100%; overflow-x: auto; overflow-y: hidden; overscroll-behavior-inline: contain; scrollbar-width: none; -webkit-overflow-scrolling: touch; scroll-snap-type: x proximity; }
  .flow-visual::-webkit-scrollbar { display: none; }
  .source-loop { width: 760px; aspect-ratio: 5 / 1; margin-bottom: 8px; }
  .source-loop img { width: 760px; transform: translateY(-42%); }
  .source-loop-hint { margin: 0 0 18px; display: flex; align-items: center; justify-content: flex-end; gap: 5px; color: var(--band-muted); font-size: 0.76rem; font-weight: 650; }
  .source-loop-hint-icon { transform: rotate(-90deg); }
  .flow-list { width: 760px; grid-template-columns: repeat(4, 1fr); }
  .flow-list li, .flow-list li + li { padding: 12px 14px 0; scroll-snap-align: center; }
  .source-chain ol { grid-template-columns: 1fr; }
  .source-chain li, .source-chain li + li { min-height: 0; padding: 22px 0 34px; border-right: 0; border-top: 1px solid var(--line); }
  .source-chain li:first-child { border-top: 0; }
  .chain-index, .case-index { margin-bottom: 30px; }
  .feature-story { padding-top: 86px; padding-bottom: 86px; gap: 38px; }
  .feature-copy h2 { font-size: clamp(2.7rem, 13vw, 4.2rem); }
  .doodle-frame { border-radius: 24px; }
  .use-case-rail { grid-template-columns: 1fr; }
  .use-case-rail article, .use-case-rail article + article { min-height: 0; padding: 22px 0 42px; border-right: 0; border-top: 1px solid #3a3a3f; }
  .use-case-rail article:first-child { border-top: 0; }
  .simulator-shell { padding: 10px; border-radius: var(--radius-md); }
  .appearance-panel { padding: 0; border-radius: 10px; }
  .sim-preview { padding: 10px 0; gap: 10px; border-radius: 10px; }
  .sim-module { min-height: 170px; padding: 18px 8px; border-radius: 14px; }
  .sim-module .sim-icon { width: 64px; height: 64px; }
  .sim-module h4 { font-size: 1.05rem; }
  .sim-module p { font-size: 0.86rem; }
  .sim-swatches { gap: 8px; }
  .sim-swatch { padding: 0; border-radius: 6px; }
  .access-section { padding: 100px 0; }
  .access-form { padding: 24px 18px; border-radius: var(--radius-md); }
  .form-row, .choice-grid { grid-template-columns: 1fr; }
  .site-footer { padding: 40px 18px 20px; }
  .footer-inner { gap: 32px; }
  .footer-brand p { margin-top: 14px; }
  .footer-navigation { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 20px; row-gap: 0; }
  .footer-nav-group { padding: 18px 0; border-top: 1px solid color-mix(in srgb, var(--line) 78%, transparent); }
  .footer-nav-group h2 { margin-bottom: 12px; }
  .footer-nav-group a { margin-bottom: 9px; }
  .footer-meta { margin-top: 30px; padding-top: 16px; align-items: flex-start; flex-direction: column; gap: 8px; }
  .document-main { padding-top: 44px; }
  .document-hero { margin-bottom: 54px; }
  .document-back { margin-bottom: 42px; }
  .document-hero h1 { font-size: clamp(3.1rem, 14vw, 4.6rem); }
  .document-navigation { grid-template-columns: 1fr 1fr; gap: 16px; padding: 16px; }
  .document-nav-group + .document-nav-group { margin: 0; padding: 0 0 0 16px; border-top: 0; border-left: 1px solid color-mix(in srgb, var(--line) 78%, transparent); }
  .document-nav-link { margin-right: -6px; margin-left: -6px; padding-right: 6px; padding-left: 6px; font-size: 0.8rem; }
  .not-found-actions { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .site-footer, .skip-link, .simulator-section { display: none !important; }
  body { background: #fff; color: #000; }
  .document-main { width: 100%; padding: 0; }
  .document-content p, .document-content li { color: #222; }
}