@charset "UTF-8";
@import url('tokens.css');

  /* === Self-hosted brand fonts === */
  @font-face {
    font-family: 'Jost';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/Jost-400.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Jost';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/assets/fonts/Jost-500.woff2') format('woff2');
  }
  @font-face {
    font-family: 'Jost';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/assets/fonts/Jost-700.woff2') format('woff2');
  }
  @font-face {
    font-family: 'JetBrains Mono';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/JetBrainsMono-400.woff2') format('woff2');
  }
  @font-face {
    font-family: 'JetBrains Mono';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('/assets/fonts/JetBrainsMono-700.woff2') format('woff2');
  }

* { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; font-size: 16px; }
  html[lang="ja"] { font-feature-settings: "palt"; } /* JA: proportional alternate metrics */
  body {
    background: var(--bg-primary); color: var(--text);
    font-family: var(--font-sans); font-weight: 400; line-height: 1.65;
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }
  ::selection { background: var(--text); color: var(--bg-primary); }
  .container { max-width: 1100px; margin: 0 auto; padding: 0 32px; }

  .nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 16px 32px; display: flex; justify-content: space-between; align-items: center;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    background: rgba(15, 20, 25, 0.8); border-bottom: 1px solid var(--border-faint);
  }
  .nav__left { display: flex; align-items: center; gap: 16px; }
  .nav__logo { font-weight: 700; font-size: var(--fs-body-lg); letter-spacing: 0.25em; color: var(--text); text-decoration: none; }
  .nav__meta { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.2em; }
  .lang-switcher { display: flex; gap: 0; border: 1px solid var(--border); }
  .lang-switcher__btn {
    background: transparent; border: none; color: var(--text-tertiary);
    font-family: var(--font-mono); font-size: var(--fs-label);
    padding: 6px 12px; cursor: pointer; letter-spacing: 0.1em; transition: all 0.15s;
    border-right: 1px solid var(--border);
    text-decoration: none;
  }
  .lang-switcher__btn:last-child { border-right: none; }
  .lang-switcher__btn:hover { color: var(--text); }
  .lang-switcher__btn--active { background: var(--text); color: var(--bg-primary); }
  .lang-switcher__btn--active:hover { color: var(--bg-primary); }
  .lang-switcher__btn--disabled,
  .lang-switcher__btn--disabled:hover { color: var(--text-quaternary); cursor: default; }

  .hero {
    min-height: 100vh; display: flex; flex-direction: column; justify-content: center; align-items: center;
    padding: 120px 32px 80px; text-align: center; position: relative;
  }
  .hero__status {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-mono); font-size: var(--fs-label);
    color: var(--text-tertiary); letter-spacing: 0.2em;
    margin-bottom: 56px; padding: 8px 14px; border: 1px solid var(--border);
  }
  .hero__status-dot { width: 6px; height: 6px; background: var(--text-tertiary); border-radius: 50%; animation: pulse 2s infinite; }
  @keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
  .hero__d { font-size: clamp(160px, 28vw, 320px); font-weight: 700; line-height: 0.85; letter-spacing: -0.04em; margin-bottom: 8px; }
  .hero__name { font-size: var(--fs-display-lg); font-weight: 700; letter-spacing: 0.3em; margin-bottom: 32px; padding-left: 0.3em; }
  .hero__tagline { font-size: clamp(22px, 3vw, 32px); font-weight: 500; letter-spacing: 0.05em; margin-bottom: 12px; }
  .hero__subtitle { font-size: var(--fs-caption); color: var(--text-tertiary); letter-spacing: 0.3em; text-transform: uppercase; margin-bottom: 80px; }
  .hero__scroll { position: absolute; bottom: 32px; font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-quaternary); letter-spacing: 0.3em; animation: bounce 2.4s infinite; }
  @keyframes bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

  .section { padding: 140px 0; border-top: 1px solid var(--border-faint); }
  .section__label { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.25em; margin-bottom: 24px; display: block; }
  .section__title { font-size: var(--fs-section); font-weight: 700; letter-spacing: -0.01em; line-height: var(--lh-tight); margin-bottom: 32px; }
  .section__body { font-size: var(--fs-body-lg); color: var(--text-secondary); max-width: 640px; line-height: var(--lh-relaxed); }

  .principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 64px; }
  .principle-card {
    position: relative;
    background: var(--border); padding: 32px 28px 28px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
    min-height: 240px; display: flex; flex-direction: column;
  }
  .principle-card::after {
    content: ""; position: absolute; inset: 1px;
    background: var(--bg-secondary);
    /* notch斜辺の線幅を縦横の1pxに揃える補正 (0.586 = 2 - sqrt2) */
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch) + 0.586px), calc(100% - var(--notch) + 0.586px) 100%, 0 100%);
    z-index: 0;
  }
  .principle-card__num { position: relative; z-index: 1; font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-quaternary); letter-spacing: 0.15em; margin-bottom: 28px; }
  .principle-card__title { position: relative; z-index: 1; font-size: var(--fs-h2); font-weight: 700; margin-bottom: 16px; letter-spacing: -0.01em; line-height: var(--lh-snug); }
  .principle-card__body { position: relative; z-index: 1; font-size: var(--fs-body-sm); color: var(--text-secondary); line-height: var(--lh-relaxed); flex: 1; }

  /* LAUNCH section */
  .section--launch { text-align: center; }
  .launch { margin-top: 80px; padding: 40px 0 80px; }
  .launch__date {
    font-family: var(--font-mono);
    font-size: var(--fs-section);
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
  }
  .launch__text {
    font-size: clamp(18px, 2.4vw, 26px);
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    font-weight: 500;
  }

  /* EVIDENCE section link (landing → Library)。card title のタイポ(Jost / fs-h2 / 700 / -0.01em)に整合 */
  .evidence-link {
    display: inline-flex; align-items: baseline; gap: 0.4em;
    font-family: var(--font-sans); font-size: var(--fs-h2); font-weight: 700;
    letter-spacing: -0.01em; color: var(--text); text-decoration: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 6px; margin-top: 28px;
    transition: opacity 0.2s, border-color 0.2s;
  }
  .evidence-link:hover { opacity: 0.7; border-color: var(--text-tertiary); }
  .evidence-link__arrow { font-weight: 400; }

  /* responsive line-break utilities — br-sp: モバイルのみ改行 / br-pc: desktop のみ改行 */
  .br-sp { display: none; }
  .br-pc { display: inline; }

  .footer { border-top: 1px solid var(--border-faint); padding: 80px 32px 48px; text-align: center; }
  .footer__d { font-size: 56px; font-weight: 700; line-height: 1; margin-bottom: 24px; color: var(--text-quaternary); }
  .footer__tagline { font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.15em; margin-bottom: 24px; }
  .footer__copyright { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.15em; }
  .footer__license { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-quaternary); line-height: 1.6; }
  .footer__license a { color: var(--text-tertiary); text-decoration: none; }
  .footer__license a:hover { color: var(--text); }

  @media (max-width: 768px) {
    .container { padding: 0 24px; }
    .nav { padding: 12px 16px; }
    .nav__meta { display: none; }
    .nav__left { gap: 12px; }
    .lang-switcher__btn { padding: 5px 9px; }
    .hero { padding: 100px 24px 60px; }
    .section { padding: 80px 0; }
    .principle-grid { grid-template-columns: 1fr; }
    .br-sp { display: inline; }
    .br-pc { display: none; }
  }

  .reveal { opacity: 0; transform: translateY(20px); animation: reveal 0.9s cubic-bezier(0.2, 0.8, 0.3, 1) forwards; }
  .reveal--1 { animation-delay: 0.1s; } .reveal--2 { animation-delay: 0.3s; }
  .reveal--3 { animation-delay: 0.5s; } .reveal--4 { animation-delay: 0.7s; }
  .reveal--5 { animation-delay: 0.9s; }
  @keyframes reveal { to { opacity: 1; transform: translateY(0); } }

  /* Cookie banner */
  .cookie-banner {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: rgba(26, 31, 38, 0.96);
    border-top: 1px solid var(--border);
    z-index: 200; padding: 20px 32px;
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  }
  .cookie-banner[hidden] { display: none; }
  .cookie-banner__inner {
    max-width: 1100px; margin: 0 auto;
    display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
  }
  .cookie-banner__text { flex: 1; min-width: 280px; }
  .cookie-banner__title {
    font-family: var(--font-mono);
    font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.25em;
    display: block; margin-bottom: 8px;
  }
  .cookie-banner__body {
    font-size: var(--fs-caption); color: var(--text-secondary); line-height: 1.6;
    margin: 0 0 6px;
  }
  .cookie-banner__link {
    font-size: var(--fs-caption-sm); color: var(--text);
    text-decoration: underline; text-underline-offset: 3px;
  }
  .cookie-banner__link:hover { color: var(--text-secondary); }
  .cookie-banner__buttons { display: flex; gap: 8px; flex-shrink: 0; }
  .cookie-banner__btn {
    padding: 10px 20px;
    font-family: var(--font-sans); font-size: var(--fs-caption-sm); font-weight: 700;
    letter-spacing: 0.15em; cursor: pointer;
    border: 1px solid var(--border); background: transparent; color: var(--text);
    transition: all 0.15s;
  }
  .cookie-banner__btn:hover { border-color: var(--text); }
  .cookie-banner__btn--primary {
    background: var(--text); color: var(--bg-primary); border-color: var(--text);
  }
  .cookie-banner__btn--primary:hover {
    background: var(--text-secondary); border-color: var(--text-secondary);
  }

  /* Footer links */
  .footer-links {
    display: flex; gap: 24px; justify-content: center; align-items: center;
    margin-bottom: 16px; flex-wrap: wrap;
  }
  .footer-links__item {
    font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.15em;
    text-decoration: none; background: none; border: none; cursor: pointer;
    padding: 0;
  }
  .footer-links__item:hover, .footer-links button:hover { color: var(--text); }
  .footer-links__sep { color: var(--text-quaternary); font-size: var(--fs-label); }

  @media (max-width: 640px) {
    .cookie-banner { padding: 16px 20px; }
    .cookie-banner__inner { gap: 16px; }
    .cookie-banner__buttons { width: 100%; }
    .cookie-banner__btn { flex: 1; }
    .footer-links { gap: 16px; }
  }

  /* === Doc / Library / Error pages === */
  /* 以下は doc(legal) / library / article / error ページ専用のコンポーネント。
   * ベース (*, html, body, nav, lang-switcher, footer 系) は block 1 で定義済み。
   * .footer のみ doc系の hero 高さに合わせた上部 padding override が下にある。
   */

  .doc__header { padding: 120px 32px 48px; text-align: center; border-bottom: 1px solid var(--border-faint); }
  .doc__eyebrow { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.25em; margin-bottom: 20px; }
  .doc__title { font-size: var(--fs-display); font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; margin-bottom: 16px; }
  .doc__meta { font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.1em; }

  .doc__body { max-width: 720px; margin: 0 auto; padding: 64px 32px 80px; }
  .doc__body h2 { font-size: var(--fs-h2); font-weight: 700; margin-top: 56px; margin-bottom: 16px; letter-spacing: -0.01em; line-height: var(--lh-snug); color: var(--text); }
  .doc__body h2:first-child { margin-top: 0; }
  .doc__body h3 { font-size: var(--fs-body-lg); font-weight: 700; margin-top: 28px; margin-bottom: 12px; line-height: var(--lh-heading); color: var(--text); }
  .doc__body h4 { font-size: var(--fs-caption); font-weight: 700; margin-top: 20px; margin-bottom: 8px; color: var(--text-secondary); letter-spacing: 0.05em; line-height: var(--lh-heading); }
  .doc__body p { font-size: var(--fs-body); color: var(--text-secondary); line-height: var(--lh-loose); margin-bottom: 16px; }
  .doc__body strong { color: var(--text); font-weight: 700; }
  .doc__body ul, .doc__body ol { margin: 16px 0 16px 24px; color: var(--text-secondary); font-size: var(--fs-body); line-height: var(--lh-loose); }
  .doc__body li { margin-bottom: 8px; padding-left: 4px; }
  .doc__body table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: var(--fs-caption); }
  .doc__body table caption {
    position: absolute; width: 1px; height: 1px;
    margin: -1px; padding: 0; overflow: hidden;
    clip: rect(0 0 0 0); border: 0;
  }
  .doc__body th, .doc__body td { border: 1px solid var(--border); padding: 10px 12px; text-align: left; vertical-align: top; }
  .doc__body th { background: var(--bg-secondary); color: var(--text); font-weight: 700; letter-spacing: 0.05em; font-size: var(--fs-caption); }
  .doc__body td { color: var(--text-secondary); line-height: var(--lh-normal); }
  .doc__body td a { word-break: break-all; }
  .doc__body hr { border: none; border-top: 1px solid var(--border-faint); margin: 48px 0; }
  .doc__body a { color: var(--text); text-decoration: underline; text-underline-offset: 3px; overflow-wrap: break-word; }
  .doc__body a:hover { color: var(--text-secondary); }
  .doc__body code { font-family: var(--font-mono); font-size: var(--fs-caption); background: var(--bg-secondary); padding: 2px 6px; border-radius: 2px; color: var(--text); }

  /* TL;DR block (GEO/AI extraction friendly chunk boundary, brand notch対応) */
  .doc__tldr {
    position: relative;
    margin: 0 0 32px;
    padding: 18px 24px 24px;
    background: var(--border);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
  }
  .doc__tldr::after {
    content: ""; position: absolute; inset: 1px;
    background: var(--bg-secondary);
    /* notch斜辺の線幅を縦横の1pxに揃える補正 (0.586 = 2 - sqrt2) */
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch) + 0.586px), calc(100% - var(--notch) + 0.586px) 100%, 0 100%);
    z-index: 0;
  }
  .doc__tldr::before {
    content: "TL;DR";
    position: relative; z-index: 1;
    display: block;
    font-family: var(--font-mono);
    font-size: var(--fs-label);
    color: var(--text-tertiary);
    letter-spacing: 0.25em;
    margin-bottom: 8px;
  }
  .doc__tldr p {
    position: relative; z-index: 1;
    margin: 0;
    font-size: var(--fs-body);
    line-height: var(--lh-relaxed);
    color: var(--text-secondary);
  }

  .doc__faq dt { font-weight: 600; margin-top: 1.5em; color: var(--text); }
  .doc__faq dd { margin-left: 0; margin-top: 0.5em; margin-bottom: 1em; color: var(--text-secondary); line-height: var(--lh-normal); }

  .doc__breadcrumb { padding: 32px; border-top: 1px solid var(--border-faint); text-align: center; font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: 0.15em; line-height: 1.8; }
  .doc__breadcrumb a { color: var(--text-tertiary); text-decoration: none; }
  .doc__breadcrumb a:hover { color: var(--text); }
  .doc__breadcrumb-sep { color: var(--text-quaternary); margin: 0 8px; }
  .doc__breadcrumb-current { color: var(--text); }

  /* doc系ページの footer は landing より上部 padding を短縮 (80px → 64px) */
  /* TODO: landing と doc を class で分離するまでは cascade order で全ページに 64px が適用される (v22-v27 carry-over) */
  .footer { padding: 64px 32px 48px; }

  @media (max-width: 768px) {
    .doc__header { padding: 100px 24px 40px; }
    .doc__body { padding: 48px 24px 64px; }
    .doc__body table { font-size: var(--fs-caption-sm); }
    .doc__body th, .doc__body td { padding: 8px 10px; }
    .doc__tldr { margin: 0 0 24px; padding: 14px 18px 20px; }
  }
  /* === Component: library === */
  .library__header {
    padding: 120px 32px 64px; text-align: center;
    border-bottom: 1px solid var(--border-faint);
  }
  .library__eyebrow {
    font-family: var(--font-mono); font-size: var(--fs-label);
    color: var(--text-tertiary); letter-spacing: 0.25em;
    margin-bottom: 20px;
  }
  .library__title {
    font-size: var(--fs-display-lg); font-weight: 700;
    letter-spacing: -0.01em; line-height: 1.1;
    margin-bottom: 24px;
  }
  /* lead は mobile→desktop で responsive を維持するため clamp を残す (16→18) */
  .library__lead {
    font-size: clamp(16px, 2vw, 18px); color: var(--text-secondary);
    line-height: var(--lh-normal); letter-spacing: 0.02em;
  }
  .library__body { max-width: 960px; margin: 0 auto; padding: 80px 32px 80px; }
  .library__section { padding: 0 0 64px; }
  .library__section:last-child { padding-bottom: 0; }
  .library__section-label {
    font-family: var(--font-mono); font-size: var(--fs-label);
    color: var(--text-tertiary); letter-spacing: 0.25em;
    display: block; margin-bottom: 32px;
  }
  .library__section--path .library__section-label { margin-bottom: 10px; }
  .library__section-sub {
    font-size: var(--fs-body-sm); color: var(--text-secondary);
    line-height: var(--lh-relaxed); max-width: 640px; margin: 0 0 32px;
  }
  .library__series { padding-bottom: 48px; }
  .library__series:last-child { padding-bottom: 0; }
  .library__series-title {
    font-size: var(--fs-h1); font-weight: 700;
    letter-spacing: -0.01em; line-height: var(--lh-snug);
    margin: 0 0 8px; color: var(--text);
  }
  .library__series-sub {
    font-size: var(--fs-body-sm); color: var(--text-secondary);
    line-height: var(--lh-relaxed); max-width: 640px; margin: 0 0 24px;
  }
  .library__grid--children { counter-reset: card-num; margin-left: 32px; margin-top: 16px; position: relative; }
  .library__grid--children::before {
    content: ""; position: absolute;
    left: -16px; top: 0; bottom: 0;
    border-left: 1px solid var(--border);
  }
  .library__grid--children .article-card { counter-increment: card-num; }
  .library__grid--children .article-card::before {
    content: counter(card-num, decimal-leading-zero);
    display: block;
    position: relative; z-index: 1;
    font-family: var(--font-mono); font-size: var(--fs-label);
    color: var(--text-tertiary); letter-spacing: 0.25em;
    margin-bottom: 14px;
  }
  .article-card--pillar { padding: 40px 56px 40px 32px; }
  .article-card--pillar::before {
    content: "INTRO";
    display: block;
    position: relative; z-index: 1;
    font-family: var(--font-mono); font-size: var(--fs-label);
    color: var(--text-tertiary); letter-spacing: 0.25em;
    margin-bottom: 14px;
  }
  .library__intro {
    font-size: var(--fs-body); color: var(--text-secondary);
    line-height: var(--lh-loose); max-width: 640px;
    margin: 0 auto 80px;
  }
  .library__grid {
    display: grid; grid-template-columns: 1fr; gap: 16px;
  }

  /* === Component: article-card === */
  .article-card {
    position: relative;
    display: block; text-decoration: none;
    background: var(--border);
    padding: 28px 56px 28px 32px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
    transition: background-color 0.2s, transform 0.2s;
  }
  .article-card::after {
    content: ""; position: absolute; inset: 1px;
    background: var(--bg-secondary);
    /* notch斜辺の線幅を縦横の1pxに揃える補正 (0.586 = 2 - sqrt2) */
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch) + 0.586px), calc(100% - var(--notch) + 0.586px) 100%, 0 100%);
    z-index: 0;
  }
  .article-card:hover { background: var(--text-tertiary); }
  .article-card--coming { cursor: default; opacity: 0.85; }
  .article-card--coming:hover { background: var(--border); transform: none; }
  .article-card__title {
    position: relative; z-index: 1;
    font-size: var(--fs-h2); font-weight: 700;
    letter-spacing: -0.01em; line-height: var(--lh-snug);
    margin-bottom: 12px; color: var(--text);
  }
  .article-card__body {
    position: relative; z-index: 1;
    font-size: var(--fs-body-sm); color: var(--text-secondary);
    line-height: var(--lh-relaxed);
  }
  .article-card__chevron {
    position: absolute; right: 24px; top: 50%;
    transform: translateY(-50%); z-index: 1;
    display: flex; color: var(--text-tertiary);
    transition: color 0.2s;
  }
  .article-card:hover .article-card__chevron { color: var(--text); }

  @media (max-width: 768px) {
    .library__header { padding: 100px 24px 48px; }
    .library__body { padding: 56px 24px 64px; }
    .article-card { padding: 24px 48px 24px 24px; }
    .article-card__title { font-size: var(--fs-body-lg); }
    .library__grid--children { margin-left: 16px; }
    .library__grid--children::before { left: -8px; }
    .article-card--pillar { padding: 24px 48px 24px 24px; }
    .article-card--pillar .article-card__title { font-size: var(--fs-body-lg); }
  }

  /* === Component: error (404 / 403) === */
  .error { min-height: calc(100vh - 240px); display: flex; align-items: center; justify-content: center; padding: 80px 32px; text-align: center; }
  .error__code { font-family: var(--font-mono); font-size: clamp(80px, 14vw, 160px); font-weight: 700; color: var(--text); letter-spacing: -0.02em; line-height: 1; margin-bottom: 20px; }
  .error__label { font-family: var(--font-mono); font-size: var(--fs-label); color: var(--text-tertiary); letter-spacing: 0.25em; margin-bottom: 56px; }
  .error__message { font-size: var(--fs-body-lg); font-weight: 500; color: var(--text-secondary); line-height: var(--lh-normal); margin-bottom: 12px; }
  .error__message:last-of-type { margin-bottom: 56px; }
  .error__home { display: inline-block; font-family: var(--font-mono); font-size: var(--fs-caption-sm); color: var(--text-tertiary); letter-spacing: 0.2em; text-decoration: none; border-bottom: 1px solid var(--border); padding-bottom: 4px; transition: color 0.2s, border-color 0.2s; }
  .error__home:hover { color: var(--text); border-bottom-color: var(--text); }

  @media (max-width: 640px) {
    .error { padding: 60px 24px; min-height: calc(100vh - 200px); }
    .error__label { margin-bottom: 40px; }
    .error__message { font-size: var(--fs-body-sm); }
  }