@font-face { font-family: "Manrope"; font-style: normal; font-display: swap; font-weight: 500; src: url("/public/assets/fonts/manrope-cyrillic-500-normal.woff2") format("woff2"); unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116; }
@font-face { font-family: "Manrope"; font-style: normal; font-display: swap; font-weight: 500; src: url("/public/assets/fonts/manrope-latin-500-normal.woff2") format("woff2"); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: "Manrope"; font-style: normal; font-display: swap; font-weight: 700 800; src: url("/public/assets/fonts/manrope-cyrillic-700-normal.woff2") format("woff2"); unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116; }
@font-face { font-family: "Manrope"; font-style: normal; font-display: swap; font-weight: 700 800; src: url("/public/assets/fonts/manrope-latin-700-normal.woff2") format("woff2"); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-display: swap; font-weight: 400; src: url("/public/assets/fonts/ibm-plex-sans-cyrillic-400-normal.woff2") format("woff2"); unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-display: swap; font-weight: 400; src: url("/public/assets/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-display: swap; font-weight: 500 700; src: url("/public/assets/fonts/ibm-plex-sans-cyrillic-600-normal.woff2") format("woff2"); unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116; }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-display: swap; font-weight: 500 700; src: url("/public/assets/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }

:root {
  color-scheme: light dark;
  --canvas: #f7fafc;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --ink: #101820;
  --muted: #5e6c78;
  --signal: #158fbe;
  --signal-strong: #0d739b;
  --signal-soft: #ddf4fc;
  --line: #dce5ea;
  --brand-news-bg: #59646a;
  --brand-news-ink: #ffffff;
  --brand-edge: #475259;
  --brand-hub: #ff9d0a;
  --success: #20885b;
  --warning: #ad6917;
  --danger: #c13e45;
  --shadow: 0 18px 50px rgb(16 24 32 / 8%);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --content: min(1160px, calc(100vw - 40px));
  --font-display: "Manrope", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  font-family: var(--font-body);
  background: var(--canvas);
  color: var(--ink);
}

html[data-theme="dark"] {
  --canvas: #0d141a;
  --surface: #121d25;
  --surface-raised: #17242d;
  --ink: #eef6fa;
  --muted: #9cb0bd;
  --signal: #55c8f2;
  --signal-strong: #89ddfa;
  --signal-soft: #123646;
  --line: #293944;
  --brand-news-bg: #26333c;
  --brand-news-ink: #f7fafc;
  --brand-edge: #394954;
  --success: #4fb986;
  --warning: #e1a153;
  --danger: #f17980;
  --shadow: 0 22px 64px rgb(0 0 0 / 22%);
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"] {
    --canvas: #0d141a;
    --surface: #121d25;
    --surface-raised: #17242d;
    --ink: #eef6fa;
    --muted: #9cb0bd;
    --signal: #55c8f2;
    --signal-strong: #89ddfa;
    --signal-soft: #123646;
    --line: #293944;
    --brand-news-bg: #26333c;
    --brand-news-ink: #f7fafc;
    --brand-edge: #394954;
    --success: #4fb986;
    --warning: #e1a153;
    --danger: #f17980;
    --shadow: 0 22px 64px rgb(0 0 0 / 22%);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 300px;
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font: 400 17px/1.62 var(--font-body);
  text-rendering: optimizeLegibility;
}

a { color: var(--signal-strong); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

.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;
}

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  inset: 12px auto auto 12px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: var(--canvas);
}

.skip-link:focus { transform: none; }

.site-header,
.site-footer {
  width: var(--content);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header {
  min-height: 74px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-wordmark {
  display: inline-flex;
  align-items: stretch;
  color: var(--brand-news-ink);
  font: 800 22px/.95 var(--font-display);
  letter-spacing: -.065em;
  filter: drop-shadow(0 2px 4px rgb(16 24 32 / 10%));
}

.brand-news,
.brand-hub {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-news {
  padding: 5px 7px 5px 9px;
  border: 1px solid var(--brand-edge);
  border-right: 0;
  border-radius: 5px 0 0 5px;
  background: linear-gradient(145deg, color-mix(in srgb, var(--brand-news-bg) 72%, white), var(--brand-news-bg));
  box-shadow: inset 0 1px rgb(255 255 255 / 36%);
  color: var(--brand-news-ink);
}

.brand-hub {
  padding: 6px 10px 5px 8px;
  border: 1px solid #e78a00;
  border-radius: 0 5px 5px 0;
  background: var(--brand-hub);
  box-shadow: inset 0 1px rgb(255 255 255 / 26%);
  color: #0b1115;
}

.site-header nav,
.site-footer nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-header nav a,
.site-footer nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a:hover,
.site-footer nav a:hover { color: var(--ink); }

.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.section,
.tutorial-layout,
.article-layout,
.not-found {
  width: var(--content);
  margin-inline: auto;
}

.section { padding-block: clamp(64px, 9vw, 128px); }

.hero {
  min-height: min(760px, calc(100vh - 74px));
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr);
  gap: clamp(54px, 8vw, 112px);
  align-items: center;
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.08;
  text-wrap: balance;
}

h1 {
  max-width: 820px;
  font-size: clamp(42px, 5.7vw, 78px);
  font-weight: 780;
  letter-spacing: -0.055em;
}

h2 {
  max-width: 820px;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 760;
  letter-spacing: -0.045em;
}

h3 { font-size: 21px; letter-spacing: -0.025em; }

.eyebrow {
  margin: 0 0 18px;
  color: var(--signal-strong);
  font: 720 13px/1.3 var(--font-display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lead {
  max-width: 690px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.48;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }

.button,
.help-search button,
.tutorial-video button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

.button:hover,
.help-search button:hover,
.tutorial-video button:hover { transform: translateY(-1px); }

.button-primary,
.help-search button {
  background: var(--signal);
  color: #071820;
}

.button-secondary,
.tutorial-video button {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.landing-auth {
  display: grid;
  grid-template-columns: minmax(0, .72fr) minmax(390px, .58fr);
  gap: clamp(48px, 8vw, 110px);
  align-items: center;
  border-block: 1px solid var(--line);
}

.landing-auth-intro { max-width: 560px; }
.landing-auth-intro > p:last-child { max-width: 520px; margin: 24px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 21px); }

.public-auth-card {
  position: relative;
  min-width: 0;
  padding: clamp(34px, 4vw, 52px);
  overflow: hidden;
  border: 2px solid color-mix(in srgb, var(--brand-hub) 76%, var(--line));
  border-radius: 24px;
  background: radial-gradient(circle at 100% 0, color-mix(in srgb, var(--brand-hub) 10%, transparent) 0 170px, transparent 171px), var(--surface);
  box-shadow: 0 22px 64px rgb(255 157 10 / 14%);
}

.public-auth-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 7px; background: var(--brand-hub); box-shadow: 0 1px 0 #e78a00, 0 8px 24px rgb(255 157 10 / 22%); }
.public-auth-card > * { position: relative; z-index: 1; }
.public-auth-card h2 { font-size: clamp(32px, 3vw, 40px); }
.public-auth-tag { width: fit-content; min-height: 28px; display: inline-flex; align-items: center; margin: 0 0 16px; padding: 5px 10px; border: 1px solid #e78a00; border-radius: 5px; background: var(--brand-hub); box-shadow: inset 0 1px rgb(255 255 255 / 28%); color: #0b1115; font: 720 12px/1.2 var(--font-display); letter-spacing: .09em; text-transform: uppercase; }
.public-auth-lead { margin: 12px 0 0; color: var(--muted); }

.public-consent-card { margin: 34px 0 20px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--canvas); }
.public-consent-row { display: flex; align-items: start; gap: 12px; cursor: pointer; }
.public-consent-row input { width: 19px; min-height: 19px; margin: 3px 0 0; accent-color: var(--brand-hub); }
.public-consent-row > span { display: grid; gap: 4px; }
.public-consent-row small { color: var(--muted); }
.public-consent-details { margin: 12px 0 0 31px; color: var(--muted); font-size: 13px; }
.public-consent-details summary { width: fit-content; min-height: 44px; display: inline-flex; align-items: center; color: var(--signal-strong); font-weight: 650; cursor: pointer; }
.public-consent-details p { max-height: 150px; margin: 8px 0 12px; overflow: auto; }
.public-consent-details a { min-height: 44px; display: inline-flex; align-items: center; font-weight: 650; }

.public-auth-form { display: grid; gap: 12px; }
.public-auth-form label { display: grid; gap: 8px; color: var(--ink); font-size: 14px; font-weight: 650; }
.public-auth-form input { width: 100%; min-height: 46px; padding: 10px 13px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); color: var(--ink); }
.public-auth-form input:read-only { background: var(--canvas); color: var(--muted); }
.public-auth-primary { border-color: #e78a00; background: var(--brand-hub); color: #0b1115; box-shadow: inset 0 1px rgb(255 255 255 / 24%); }
.public-auth-primary:hover:not(:disabled) { background: #ffad2e; }
.public-auth-card .button:disabled { transform: none; cursor: not-allowed; opacity: .52; }
.public-auth-wide { width: 100%; }
.public-auth-divider { display: flex; align-items: center; gap: 10px; margin: 22px 0; color: var(--muted); font-size: 13px; }
.public-auth-divider::before, .public-auth-divider::after { content: ""; height: 1px; flex: 1; background: var(--line); }
.public-auth-bot-code { margin-top: 16px; }
.public-auth-status { margin: 16px 0 0; padding: 12px 14px; border-left: 3px solid var(--signal); background: color-mix(in srgb, var(--signal-soft) 50%, transparent); color: var(--ink); font-size: 14px; }
.public-auth-status-error { border-left-color: var(--danger); background: color-mix(in srgb, var(--danger) 9%, transparent); }
.public-auth-status-success { border-left-color: var(--success); background: color-mix(in srgb, var(--success) 9%, transparent); }
.public-auth-help { margin: 22px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }

.signal-composition {
  position: relative;
  display: grid;
  grid-template-columns: 0.88fr 1.08fr;
  gap: 14px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.signal-composition::before {
  content: "";
  position: absolute;
  inset: 50% 22px auto;
  height: 4px;
  border-radius: 2px;
  background: var(--signal);
  opacity: 0.7;
}

.signal-node {
  position: relative;
  z-index: 1;
  min-height: 118px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-raised);
}

.signal-node span { color: var(--signal-strong); font-size: 13px; font-weight: 760; }
.signal-node p { margin: 12px 0 0; color: var(--muted); font-size: 15px; line-height: 1.45; }
.signal-node h2 { margin-top: 10px; font-size: 22px; }
.signal-rule { transform: translateY(18px); }
.signal-reasons { transform: translateY(-12px); }
.signal-result { border-color: color-mix(in srgb, var(--signal) 65%, var(--line)); }
.signal-reasons mark { display: inline-block; margin: 3px 2px; padding: 3px 7px; border-radius: 20px; background: var(--signal-soft); color: var(--ink); }

.noise-section { border-block: 1px solid var(--line); }
.noise-grid { display: grid; grid-template-columns: 1.6fr 0.8fr; gap: 22px; margin-top: 42px; }
.noise-before, .noise-after { min-height: 180px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.noise-before { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; padding: 26px; }
.noise-before span { border-radius: var(--radius-sm); background: color-mix(in srgb, var(--muted) 16%, transparent); }
.noise-before span:nth-child(5n + 1) { background: color-mix(in srgb, var(--signal) 24%, transparent); }
.noise-after { display: grid; place-content: center; text-align: center; }
.noise-after p { margin: 0; color: var(--signal-strong); font: 760 28px/1.2 var(--font-display); }
.noise-after small { margin-top: 8px; color: var(--muted); }

.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 40px 0 0; padding: 0; list-style: none; }
.steps li, .outcome-grid article, .persona-grid article, .tutorial-card, .post-proof, .faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.steps li { min-height: 250px; padding: 28px; }
.steps li > span { color: var(--signal-strong); font: 750 13px/1 var(--font-display); letter-spacing: 0.08em; }
.steps h3 { margin-top: 66px; }
.steps p, .outcome-grid p, .persona-grid p { margin: 14px 0 0; color: var(--muted); }

.product-proof { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(400px, 1fr); gap: clamp(40px, 8vw, 110px); align-items: start; }
.post-proof { padding: clamp(24px, 4vw, 42px); box-shadow: var(--shadow); }
.post-proof .source-label { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.post-proof h3 { font-size: clamp(24px, 3vw, 34px); }
.post-proof > p:not(.source-label) { color: var(--muted); }
.post-proof ul { padding-left: 20px; color: var(--success); }

.outcome-grid, .persona-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.outcome-grid article, .persona-grid article { padding: 28px; }
.persona-grid { grid-template-columns: repeat(2, 1fr); margin-top: 36px; }

.pricing { padding-block: 44px; border-block: 1px solid var(--line); }
.pricing-line { max-width: 900px; margin: 0; font: 650 clamp(22px, 3vw, 34px)/1.35 var(--font-display); }

.faq h2 { margin-bottom: 36px; }
.faq details { margin-top: 12px; padding: 0 22px; }
.faq summary { padding: 20px 0; font-weight: 720; cursor: pointer; }
.faq details p { max-width: 800px; margin: 0 0 22px; color: var(--muted); }

.final-cta { text-align: center; }
.final-cta h2, .final-cta p { margin-inline: auto; }
.final-cta p { color: var(--muted); }
.final-cta .cta-row { justify-content: center; }

.site-footer { min-height: 100px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }

.tutorial-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 28px; padding-block: 76px 110px; }
.tutorial-intro { grid-column: 1 / -1; max-width: 880px; }
.tutorial-intro h1, .tutorial-article h1 { font-size: clamp(40px, 5.2vw, 68px); }
.tutorial-intro > p:not(.eyebrow) { color: var(--muted); font-size: 20px; }
.help-search { margin-top: 32px; }
.help-search label { display: block; margin-bottom: 9px; font-weight: 700; }
.help-search > div { display: flex; gap: 10px; }
.help-search input, .help-search textarea {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--ink);
}
.help-search textarea { min-height: 116px; resize: vertical; }
.tutorial-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.tutorial-card { padding: 22px; }
.tutorial-card h2 { font-size: 20px; }
.tutorial-card h2 a { color: var(--ink); text-decoration: none; }
.tutorial-card p { margin-bottom: 0; color: var(--muted); font-size: 15px; }
.support-fallback, .article-assistant {
  position: sticky;
  top: 24px;
  align-self: start;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.support-fallback h2, .article-assistant h2 { font-size: 23px; }
.support-fallback p { color: var(--muted); }
.assistant-result { margin-top: 18px; }
.assistant-answer, .assistant-alternatives { padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.assistant-answer h2 { font-size: 21px; }
.assistant-answer p, .assistant-answer li { color: var(--muted); }
.assistant-feedback { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
.assistant-feedback button { min-height: 38px; border: 1px solid var(--line); border-radius: 20px; background: transparent; color: var(--ink); cursor: pointer; }

.article-layout { display: grid; grid-template-columns: minmax(0, 760px) minmax(280px, 340px); gap: clamp(36px, 7vw, 96px); padding-block: 52px 110px; }
.breadcrumbs, .related-guides { grid-column: 1 / -1; }
.breadcrumbs { display: flex; gap: 9px; color: var(--muted); font-size: 14px; }
.tutorial-article > section { margin-top: 52px; }
.tutorial-article h2 { margin-bottom: 18px; font-size: clamp(26px, 3vw, 36px); }
.tutorial-article li { margin-top: 12px; padding-left: 8px; }
.article-steps { padding-left: 24px; }
.article-steps li { padding: 12px 12px 12px 18px; border-left: 3px solid var(--signal-soft); }
.expected-result {
  padding: 26px;
  border: 1px solid color-mix(in srgb, var(--success) 34%, var(--line));
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--success) 8%, var(--surface));
}
.expected-result h2::before { content: "✓"; margin-right: 10px; color: var(--success); }
.expected-result p { margin-bottom: 0; }
.tutorial-video { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.tutorial-video iframe { width: min(100%, 420px); aspect-ratio: 9 / 16; border: 0; border-radius: var(--radius-md); background: var(--canvas); }
.tutorial-video p { color: var(--muted); font-size: 14px; }
.related-guides > div { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }

.not-found { min-height: calc(100vh - 174px); display: grid; place-content: center; text-align: center; }
.not-found h1 { font-size: clamp(42px, 6vw, 76px); }
.not-found p:not(.eyebrow) { color: var(--muted); }

.legal-shell .brand { gap: 0; margin: 0; }
.legal-document { width: min(760px, calc(100vw - 40px)); margin-inline: auto; padding-block: 52px 96px; }
.legal-document article { margin-top: clamp(48px, 8vw, 88px); }
.legal-document h1 { max-width: 720px; font-size: clamp(42px, 6vw, 68px); }
.legal-document article > section { margin-top: 52px; }
.legal-document h2 { margin-bottom: 18px; font-size: clamp(26px, 3vw, 36px); }
.legal-version { margin: 18px 0 0; color: var(--signal-strong); font: 600 13px/1.4 "IBM Plex Mono", monospace; }
.legal-lead { margin-top: 28px; color: var(--muted); font-size: 19px; }
.legal-purposes { padding-left: 24px; }
.legal-purposes li { margin-top: 10px; font: 500 15px/1.5 "IBM Plex Mono", monospace; overflow-wrap: anywhere; }
.legal-notice { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); }
.legal-notice p { margin-bottom: 0; color: var(--muted); }

@media (max-width: 900px) {
  .hero, .landing-auth, .product-proof, .tutorial-layout, .article-layout { grid-template-columns: 1fr; }
  .hero { padding-top: 72px; }
  .signal-composition { max-width: 650px; }
  .public-auth-card { width: min(100%, 560px); }
  .support-fallback, .article-assistant { position: static; }
  .tutorial-intro, .breadcrumbs, .related-guides { grid-column: 1; }
}

@media (max-width: 680px) {
  :root { --content: min(100% - 28px, 1160px); }
  body { font-size: 16px; }
  .site-header { min-height: 64px; }
  .site-header nav { gap: 12px; }
  .site-header nav a:first-child { display: none; }
  .site-header nav a { font-size: 14px; }
  .section { padding-block: 68px; }
  .hero { min-height: auto; gap: 50px; padding-top: 56px; }
  .signal-composition { grid-template-columns: 1fr; padding: 18px; }
  .signal-composition::before { inset: 24px auto 24px 50%; width: 4px; height: auto; }
  .signal-rule, .signal-reasons { transform: none; }
  .noise-grid, .steps, .outcome-grid, .persona-grid, .tutorial-grid, .related-guides > div { grid-template-columns: 1fr; }
  .noise-before { grid-template-columns: repeat(4, 1fr); }
  .steps li { min-height: 210px; }
  .help-search > div, .cta-row { align-items: stretch; flex-direction: column; }
  .tutorial-layout, .article-layout { padding-block: 44px 82px; }
  .legal-document { width: min(100% - 28px, 760px); padding-block: 32px 72px; }
  .legal-document article { margin-top: 42px; }
  .legal-notice { padding: 22px; }
  .article-assistant { order: 3; }
  .public-auth-card { padding: 34px 22px; border-radius: 18px; }
}

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

@media print {
  .site-header, .site-footer, .cta-row, .article-assistant, .tutorial-video button { display: none; }
  :root { --canvas: #fff; --surface: #fff; --ink: #000; --muted: #333; --line: #bbb; }
  body { font-size: 11pt; }
  .section, .article-layout { width: 100%; padding: 24px 0; }
}