@layer reset, tokens, base, layout, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body, h1, h2, h3, p, dl, dd { margin: 0; }
  img, svg { display: block; max-width: 100%; }
  button, input { font: inherit; }
}

@layer tokens {
  :root {
    color-scheme: light dark;
    --color-ink: #173047;
    --color-ink-soft: #365064;
    --color-paper: #fbf9f3;
    --color-paper-raised: #fffdf8;
    --color-sand: #f4f0e5;
    --color-fuel: #f4bd4f;
    --color-fuel-dark: #8f5b00;
    --color-trust: #2f7b73;
    --color-trust-dark: #235e58;
    --color-line: #d9d4c7;
    --color-muted: #5b6b76;
    --color-focus: #0b6fea;
    --font-ui: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
    --font-display: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
    --step--1: clamp(0.82rem, 0.79rem + 0.12vw, 0.9rem);
    --step-0: clamp(1rem, 0.96rem + 0.18vw, 1.1rem);
    --step-1: clamp(1.24rem, 1.14rem + 0.42vw, 1.5rem);
    --step-2: clamp(1.55rem, 1.36rem + 0.8vw, 2rem);
    --step-3: clamp(2rem, 1.62rem + 1.6vw, 3rem);
    --step-4: clamp(2.65rem, 1.9rem + 3vw, 4.6rem);
    --space-1: 0.5rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-7: 4.5rem;
    --radius-sm: 0.75rem;
    --radius-md: 1.1rem;
    --radius-lg: 1.75rem;
    --shadow-card: 0 16px 40px rgb(23 48 71 / 8%);
    --page-width: 74rem;
    --motion-fast: 140ms;
    --motion-base: 220ms;
    --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --color-ink: #edf4f1;
      --color-ink-soft: #c4d2d1;
      --color-paper: #102434;
      --color-paper-raised: #183247;
      --color-sand: #213a4d;
      --color-line: #3f5667;
      --color-muted: #afbec4;
      --color-fuel-dark: #f4bd4f;
      --color-trust-dark: #78b7af;
      --shadow-card: 0 16px 40px rgb(0 0 0 / 24%);
    }
  }
}

@layer base {
  body {
    min-width: 20rem;
    background: var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-ui);
    font-size: var(--step-0);
    line-height: 1.7;
    text-rendering: optimizeLegibility;
  }

  a { color: inherit; text-decoration-thickness: 0.08em; text-underline-offset: 0.18em; }
  :focus-visible { outline: 3px solid var(--color-focus); outline-offset: 4px; }
  ::selection { background: var(--color-fuel); color: #173047; }
}

@layer layout {
  .page-shell { width: min(calc(100% - 2rem), var(--page-width)); margin-inline: auto; }
  .home-section { padding-block: var(--space-7); }
  .home-section--tinted { background: var(--color-sand); }
}

@layer components {
  .skip-link {
    position: fixed;
    z-index: 100;
    inset: 0 auto auto 0;
    padding: 0.8rem 1rem;
    translate: 0 -120%;
    background: var(--color-fuel);
    color: #173047;
    font-weight: 700;
  }

  .skip-link:focus { translate: 0; }

  .site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--color-line) 78%, transparent);
    background: color-mix(in srgb, var(--color-paper) 92%, transparent);
    backdrop-filter: blur(18px);
  }

  .site-header__inner {
    display: flex;
    min-height: 5.2rem;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
  }

  .brand-link { flex: 0 1 21.5rem; text-decoration: none; }
  .brand-link__logo { width: min(100%, 21.5rem); height: auto; }

  .site-nav { display: flex; align-items: center; gap: 0.25rem; }
  .site-nav__link { padding: 0.65rem 0.9rem; border-radius: 999px; font-weight: 600; text-decoration: none; white-space: nowrap; }
  .site-nav__link:hover { background: var(--color-sand); }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    min-width: 2.75rem;
    min-height: 2.75rem;
    gap: 0.6rem;
    border: 1px solid var(--color-line);
    border-radius: 999px;
    padding: 0.6rem 0.8rem;
    background: var(--color-paper-raised);
    color: var(--color-ink);
    font-weight: 700;
  }

  .nav-toggle__icon,
  .nav-toggle__icon::before,
  .nav-toggle__icon::after {
    width: 1.2rem;
    height: 2px;
    background: currentcolor;
    content: "";
  }

  .nav-toggle__icon { position: relative; display: block; }
  .nav-toggle__icon::before { position: absolute; inset: -0.35rem 0 auto; }
  .nav-toggle__icon::after { position: absolute; inset: 0.35rem 0 auto; }

  .home-hero { padding: 1rem 0 0; }

  .home-hero__inner {
    position: relative;
    overflow: hidden;
    display: grid;
    min-height: 37rem;
    grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.75fr);
    align-items: center;
    gap: var(--space-6);
    border-radius: var(--radius-lg);
    padding: clamp(2rem, 5vw, 5rem);
    background: #173047;
    color: #fbf9f3;
  }

  .home-hero__inner::before {
    position: absolute;
    inset: -30% -10% auto 42%;
    width: 60%;
    aspect-ratio: 1;
    border: 1px solid rgb(244 189 79 / 18%);
    border-radius: 50%;
    box-shadow: 0 0 0 3rem rgb(244 189 79 / 4%), 0 0 0 7rem rgb(244 189 79 / 3%);
    content: "";
  }

  .home-hero__copy, .supply-route { position: relative; z-index: 1; }

  .home-hero__eyebrow {
    margin-bottom: var(--space-3);
    color: #b9d8d3;
    font-size: var(--step--1);
    font-weight: 700;
    letter-spacing: 0.14em;
  }

  .home-hero__title {
    max-width: 12ch;
    font-family: var(--font-display);
    font-size: var(--step-4);
    font-weight: 600;
    letter-spacing: -0.055em;
    line-height: 1.16;
  }

  .home-hero__accent {
    color: var(--color-fuel);
    font-size: 1.14em;
    font-weight: 700;
    white-space: nowrap;
  }

  .home-hero__tail { white-space: nowrap; }

  .home-hero__lead { max-width: 42rem; margin-top: var(--space-4); color: #d8e2e0; }

  .site-search { max-width: 43rem; margin-top: var(--space-5); }
  .site-search__label { display: block; margin-bottom: 0.55rem; font-size: var(--step--1); font-weight: 700; }
  .site-search__control { display: flex; gap: 0.7rem; }
  .site-search__input {
    min-width: 0;
    flex: 1;
    border: 1px solid rgb(255 255 255 / 28%);
    border-radius: 999px;
    padding: 0.85rem 1.15rem;
    background: rgb(255 255 255 / 10%);
    color: white;
  }
  .site-search__input::placeholder { color: #c0cdcf; }

  .button {
    border: 0;
    border-radius: 999px;
    padding: 0.85rem 1.25rem;
    cursor: pointer;
    font-weight: 700;
    transition: background-color var(--motion-fast) ease, border-color var(--motion-fast) ease, box-shadow var(--motion-fast) ease, transform var(--motion-fast) var(--ease-out);
  }
  .button--fuel { background: var(--color-fuel); color: #173047; }
  .button--fuel:hover { background: #ffd16e; box-shadow: 0 8px 20px rgb(154 101 0 / 18%); }
  .button:active { transform: translateY(1px) scale(0.985); }

  .supply-route { display: grid; gap: var(--space-3); margin: 0; padding: 0; list-style: none; }

  .supply-stop {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: var(--space-3);
    align-items: center;
    border: 1px solid rgb(255 255 255 / 18%);
    border-radius: var(--radius-md);
    padding: 1rem 1.1rem;
    background: rgb(255 255 255 / 7%);
  }

  .supply-stop__number {
    grid-row: 1 / 3;
    color: var(--color-fuel);
    font-size: var(--step-1);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
  }
  .supply-stop__title { font-size: var(--step-0); }
  .supply-stop__text { color: #c7d3d4; font-size: var(--step--1); }
  .supply-stop--final { border-color: rgb(244 189 79 / 58%); background: rgb(244 189 79 / 10%); }

  .section-heading { max-width: 44rem; margin-bottom: var(--space-5); }
  .section-heading__kicker { margin-bottom: var(--space-2); color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; letter-spacing: 0.11em; }
  .section-heading__title { font-family: var(--font-display); font-size: var(--step-3); line-height: 1.2; }

  .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
  .service-card {
    position: relative;
    overflow: hidden;
    display: flex;
    min-height: 23rem;
    flex-direction: column;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
    text-decoration: none;
    transition: border-color var(--motion-base) ease, translate var(--motion-base) var(--ease-out), box-shadow var(--motion-base) ease;
  }
  .service-card:hover { border-color: color-mix(in srgb, var(--color-trust) 55%, var(--color-line)); translate: 0 -0.3rem; box-shadow: 0 22px 55px rgb(23 48 71 / 14%); }
  .service-card--fuel { border-top: 0.45rem solid var(--color-fuel); }
  .service-card__header { display: flex; min-height: 9.5rem; align-items: flex-start; justify-content: space-between; gap: var(--space-3); }
  .service-card__visual {
    overflow: hidden;
    width: clamp(7.5rem, 12vw, 9.5rem);
    flex: none;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    background: var(--color-sand);
  }
  .service-card__visual img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; transition: scale var(--motion-base) var(--ease-out); }
  .service-card__meta { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .service-card__title { max-width: 13ch; margin-top: var(--space-3); font-family: var(--font-display); font-size: var(--step-2); line-height: 1.25; }
  .service-card__description { margin-top: var(--space-3); color: var(--color-muted); }
  .service-card__action { margin-top: auto; padding-top: var(--space-5); font-weight: 700; }
  .service-card__action span, .listing-card__action span, .term-card__action span, .etf-card__action span, .question-card > span:last-child span { display: inline-block; transition: transform var(--motion-fast) var(--ease-out); }
  .service-card:hover .service-card__visual img { scale: 1.04; }
  .service-card:hover .service-card__action span, .listing-card:hover .listing-card__action span, .term-card:hover .term-card__action span, .etf-card:hover .etf-card__action span, .question-card:hover > span:last-child span { transform: translateX(0.3rem); }

  .question-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
  .question-card {
    display: grid;
    min-height: 12.5rem;
    align-content: start;
    gap: var(--space-2);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    background: var(--color-paper-raised);
    text-decoration: none;
    transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease, transform var(--motion-base) var(--ease-out);
  }
  .question-card__meta { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .question-card strong { font-family: var(--font-display); font-size: var(--step-1); line-height: 1.35; }
  .question-card > span:last-child { align-self: end; margin-top: auto; padding-top: var(--space-3); color: var(--color-ink-soft); font-size: var(--step--1); font-weight: 700; }
  .question-card:hover { border-color: var(--color-trust); box-shadow: var(--shadow-card); transform: translateY(-0.2rem); }
  .question-card:active { transform: translateY(0) scale(0.99); }

  .proof-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.65fr);
    align-items: center;
    gap: var(--space-6);
    overflow: hidden;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: clamp(1.5rem, 4vw, 3rem);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
  }
  .proof-panel__copy > p:last-child { max-width: 48rem; margin-top: var(--space-3); color: var(--color-muted); }
  .proof-metrics { display: grid; grid-template-columns: repeat(3, 1fr); overflow: hidden; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: var(--color-line); gap: 1px; }
  .proof-metrics div { display: grid; min-width: 0; gap: var(--space-1); padding: var(--space-3); background: var(--color-sand); text-align: center; }
  .proof-metrics dt { color: var(--color-muted); font-size: 0.78rem; }
  .proof-metrics dd { color: var(--color-fuel-dark); font-size: var(--step-2); font-weight: 700; font-variant-numeric: tabular-nums; }

  .site-footer { background: #173047; color: #fbf9f3; }
  .site-footer__inner { display: grid; grid-template-columns: 1fr auto; gap: var(--space-4) var(--space-6); padding-block: var(--space-6); }
  .site-footer__brand { font-family: var(--font-display); font-size: var(--step-1); }
  .site-footer__tagline, .site-footer__notice { color: #c7d3d4; }
  .site-footer__nav { display: flex; flex-wrap: wrap; gap: var(--space-4); }
  .site-footer__settings { border: 0; padding: 0; background: transparent; color: inherit; cursor: pointer; font: inherit; text-decoration: underline; text-underline-offset: 0.18em; }
  .site-footer__settings:hover, .site-footer__settings:focus-visible { color: var(--color-fuel); }
  .site-footer__notice { grid-column: 1 / -1; font-size: var(--step--1); }

  .back-to-top {
    position: fixed;
    z-index: 20;
    right: max(1rem, calc((100vw - var(--page-width)) / 2));
    bottom: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border: 1px solid rgb(251 249 243 / 42%);
    border-radius: 999px;
    padding: 0.55rem 0.8rem;
    background: #173047;
    color: #fbf9f3;
    box-shadow: var(--shadow-card);
    font-size: var(--step--1);
    font-weight: 700;
    text-decoration: none;
    opacity: 0;
    pointer-events: none;
    translate: 0 0.7rem;
    transition: opacity 160ms ease, translate 160ms ease;
  }
  .back-to-top[data-visible="true"] { opacity: 1; pointer-events: auto; translate: 0; }

  .consent-banner {
    position: fixed;
    z-index: 20;
    inset: auto 1rem 1rem;
    display: grid;
    width: min(calc(100% - 2rem), 62rem);
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-4);
    margin-inline: auto;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
  }
  .consent-banner p { max-width: 48rem; margin-top: var(--space-1); color: var(--color-muted); font-size: var(--step--1); }
  .consent-banner p a { color: var(--color-trust-dark); font-weight: 700; }
  .consent-banner__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

  .content-shell { padding-block: var(--space-5) var(--space-7); }
  .breadcrumb { display: flex; flex-wrap: wrap; gap: 0.55rem; color: var(--color-muted); font-size: var(--step--1); }
  .breadcrumb a { color: var(--color-trust-dark); }

  .page-hero { max-width: 58rem; padding-block: var(--space-6); }
  .page-hero--compact { padding-bottom: var(--space-5); }
  .page-hero--tool { max-width: 52rem; }
  .page-hero__kicker { margin-bottom: var(--space-2); color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; letter-spacing: 0.12em; }
  .page-hero__title { font-family: var(--font-display); font-size: var(--step-4); line-height: 1.12; letter-spacing: -0.045em; }
  .page-hero__description { max-width: 46rem; margin-top: var(--space-3); color: var(--color-muted); font-size: var(--step-1); }
  .page-hero__date { margin-top: var(--space-3); color: var(--color-muted); font-size: var(--step--1); }

  .listing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
  .listing-card {
    overflow: hidden;
    display: flex;
    min-height: 20rem;
    flex-direction: column;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
    text-decoration: none;
    transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease, transform var(--motion-base) var(--ease-out);
  }
  .listing-card__visual { overflow: hidden; aspect-ratio: 16 / 9; margin: calc(var(--space-5) * -1) calc(var(--space-5) * -1) var(--space-4); border-bottom: 1px solid var(--color-line); background: var(--color-sand); }
  .listing-card__visual img { width: 100%; height: 100%; object-fit: cover; transition: scale var(--motion-base) var(--ease-out); }
  .listing-card:hover { border-color: var(--color-trust); box-shadow: 0 22px 55px rgb(23 48 71 / 13%); transform: translateY(-0.25rem); }
  .listing-card:hover .listing-card__visual img { scale: 1.035; }
  .listing-card:active { transform: translateY(0) scale(0.992); }
  .listing-card__meta { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .listing-card__title { margin-top: var(--space-3); font-family: var(--font-display); font-size: var(--step-2); line-height: 1.25; }
  .listing-card__description { margin-top: var(--space-3); color: var(--color-muted); }
  .listing-card__action { margin-top: auto; padding-top: var(--space-5); font-weight: 700; }

  .tool-layout { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.95fr); gap: var(--space-4); align-items: start; }
  .calculator, .result-panel {
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: clamp(1.25rem, 3vw, 2.2rem);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
  }
  .calculator__heading { margin-bottom: var(--space-4); }
  .calculator__heading h2 { font-family: var(--font-display); font-size: var(--step-2); }
  .calculator__heading p { margin-top: var(--space-1); color: var(--color-muted); }
  .field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); }
  .field { display: grid; align-content: start; gap: 0.45rem; margin-bottom: var(--space-3); }
  .field__label { font-size: var(--step--1); font-weight: 700; }
  .field__control {
    width: 100%;
    min-height: 3rem;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: 0.7rem 0.8rem;
    background: var(--color-paper);
    color: var(--color-ink);
    font-variant-numeric: tabular-nums;
    transition: border-color var(--motion-fast) ease, box-shadow var(--motion-fast) ease, background-color var(--motion-fast) ease;
  }
  .field__control:hover { border-color: color-mix(in srgb, var(--color-trust) 55%, var(--color-line)); }
  .field__control:focus { border-color: var(--color-trust); box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--color-trust) 18%, transparent); }
  .field__hint { color: var(--color-muted); font-size: 0.78rem; line-height: 1.5; }
  .lot-grid { display: grid; grid-template-columns: auto repeat(3, minmax(0, 1fr)); gap: var(--space-2) var(--space-3); align-items: end; }
  .lot-grid__heading { align-self: center; padding-top: var(--space-3); white-space: nowrap; }
  .calculator__live-note { margin-top: var(--space-2); color: var(--color-muted); font-size: 0.78rem; }
  .calculator__error { min-height: 1.7em; margin-top: var(--space-2); color: #ad2626; font-weight: 600; }

  .result-panel { position: sticky; top: 7rem; border-top: 0.5rem solid var(--color-fuel); }
  .result-panel__kicker { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; letter-spacing: 0.11em; }
  .result-panel__primary { display: grid; gap: 0.3rem; margin-top: var(--space-3); padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-line); }
  .result-panel__primary span { color: var(--color-muted); }
  .result-panel__primary strong { font-size: var(--step-3); line-height: 1.2; font-variant-numeric: tabular-nums; }
  .result-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); margin-top: var(--space-4); }
  .result-metric { min-width: 0; }
  .result-metric dt { color: var(--color-muted); font-size: var(--step--1); }
  .result-metric dd { margin-top: 0.2rem; font-weight: 700; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
  .result-panel__explanation { margin-top: var(--space-4); }
  .result-panel__note { margin-top: var(--space-4); color: var(--color-muted); font-size: var(--step--1); }

  .prose { max-width: 46rem; }
  .prose--tool { margin-top: var(--space-7); }
  .prose > * + * { margin-top: 1.2em; }
  .prose h2 { margin-top: 2.2em; font-family: var(--font-display); font-size: var(--step-2); line-height: 1.3; }
  .prose h3 { margin-top: 1.8em; font-size: var(--step-1); }
  .prose a { color: var(--color-trust-dark); font-weight: 600; }
  .prose code { border-radius: 0.3rem; padding: 0.12em 0.35em; background: var(--color-sand); font-size: 0.9em; }
  .prose table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
  .prose th, .prose td { padding: 0.75rem 0.9rem; border: 1px solid var(--color-line); text-align: left; }
  .prose th { background: var(--color-sand); }
  .prose th:last-child, .prose td:last-child { text-align: right; }
  .tool-faq { margin-top: var(--space-6); }
  .faq-item { border-top: 1px solid var(--color-line); padding-block: var(--space-3); }
  .faq-item:last-child { border-bottom: 1px solid var(--color-line); }
  .faq-item summary { cursor: pointer; font-weight: 700; }
  .faq-item p { margin-top: var(--space-2); color: var(--color-ink-soft); }

  .filter-bar { display: flex; align-items: end; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
  .filter-bar__field { width: min(100%, 32rem); margin: 0; }
  .filter-bar__count { color: var(--color-muted); font-size: var(--step--1); }
  .category-nav { margin-bottom: var(--space-5); border-block: 1px solid var(--color-line); padding-block: var(--space-3); }
  .category-nav__label { display: block; margin-bottom: var(--space-2); font-size: var(--step--1); }
  .category-nav__links { display: flex; flex-wrap: wrap; gap: var(--space-2); }
  .category-chip { border: 1px solid var(--color-line); border-radius: 999px; padding: 0.42rem 0.72rem; background: var(--color-paper-raised); font-size: var(--step--1); font-weight: 600; text-decoration: none; transition: border-color var(--motion-fast) ease, background-color var(--motion-fast) ease, color var(--motion-fast) ease, transform var(--motion-fast) var(--ease-out); }
  .category-chip:hover { border-color: var(--color-trust); background: color-mix(in srgb, var(--color-trust) 8%, var(--color-paper-raised)); transform: translateY(-0.1rem); }
  .category-chip:active { transform: scale(0.975); }
  .category-chip[aria-current="page"] { border-color: var(--color-trust); background: var(--color-trust); color: #fff; }
  .category-chip[aria-current="page"] span { color: #fff; }
  .category-chip span { margin-left: 0.2rem; color: var(--color-muted); font-variant-numeric: tabular-nums; }
  .directory-groups__hint { margin-bottom: var(--space-3); color: var(--color-muted); font-size: var(--step--1); }
  .directory-groups { overflow: clip; border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: var(--color-paper-raised); counter-reset: directory-group; }
  .directory-group { scroll-margin-top: 6rem; border-bottom: 1px solid var(--color-line); background: transparent; counter-increment: directory-group; }
  .directory-group:last-child { border-bottom: 0; }
  .directory-group__summary { display: grid; min-height: 3.75rem; grid-template-columns: 2rem minmax(0, 1fr) auto 1.5rem; gap: var(--space-2); align-items: center; padding: 0.8rem var(--space-4); cursor: pointer; list-style: none; transition: background-color var(--motion-fast) ease, box-shadow var(--motion-fast) ease, color var(--motion-fast) ease; }
  .directory-group__summary::-webkit-details-marker { display: none; }
  .directory-group__summary::before { color: var(--color-fuel-dark); content: counter(directory-group, decimal-leading-zero); font-size: var(--step--1); font-variant-numeric: tabular-nums; font-weight: 700; letter-spacing: 0.08em; }
  .directory-group__summary::after { color: var(--color-trust-dark); content: "›"; font-size: 1.45rem; font-weight: 700; line-height: 1; text-align: center; transition: transform var(--motion-fast) var(--ease-out); }
  .directory-group[open] .directory-group__summary { background: color-mix(in srgb, var(--color-sand) 62%, var(--color-paper-raised)); box-shadow: inset 0.25rem 0 0 var(--color-fuel); }
  .directory-group[open] .directory-group__summary::after { transform: rotate(90deg); }
  .directory-group__summary:hover { background: color-mix(in srgb, var(--color-sand) 42%, var(--color-paper-raised)); }
  .directory-group__summary:focus-visible { outline: 3px solid color-mix(in srgb, var(--color-focus) 65%, transparent); outline-offset: -3px; }
  .directory-group__title { font-family: var(--font-display); font-size: var(--step-0); font-weight: 700; }
  .directory-group__count { white-space: nowrap; color: var(--color-muted); font-size: var(--step--1); font-variant-numeric: tabular-nums; font-weight: 600; }
  .directory-group__content { border-top: 1px solid var(--color-line); padding: var(--space-4); background: color-mix(in srgb, var(--color-sand) 20%, var(--color-paper-raised)); }
  .directory-group__category-link { display: inline-block; margin-bottom: var(--space-3); color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; text-underline-offset: 0.2em; }
  .glossary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); }
  .term-card {
    display: flex;
    min-height: 12rem;
    flex-direction: column;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    background: var(--color-paper-raised);
    text-decoration: none;
    transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease, transform var(--motion-base) var(--ease-out);
  }
  .term-card:hover { border-color: var(--color-trust); box-shadow: var(--shadow-card); transform: translateY(-0.2rem); }
  .term-card:active { transform: translateY(0) scale(0.99); }
  .term-card__category { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .term-card__title { margin-top: var(--space-1); font-family: var(--font-display); font-size: var(--step-1); line-height: 1.25; }
  .term-card__english { color: var(--color-muted); font-size: var(--step--1); }
  .term-card__summary { margin-top: var(--space-2); color: var(--color-ink-soft); font-size: var(--step--1); line-height: 1.55; }
  .term-card__action { margin-top: auto; padding-top: var(--space-3); font-size: var(--step--1); font-weight: 700; }
  .empty-state { border: 1px dashed var(--color-line); border-radius: var(--radius-md); padding: var(--space-5); text-align: center; color: var(--color-muted); }

  .term-hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(17rem, 0.7fr); gap: var(--space-5); align-items: end; padding-block: var(--space-6); border-bottom: 1px solid var(--color-line); }
  .term-hero__title { font-family: var(--font-display); font-size: var(--step-4); line-height: 1.1; letter-spacing: -0.045em; }
  .term-hero__english { margin-top: var(--space-1); color: var(--color-muted); font-size: var(--step-1); }
  .term-hero__summary { max-width: 40rem; margin-top: var(--space-4); font-size: var(--step-1); font-weight: 600; }
  .term-meta { display: grid; gap: var(--space-3); border-left: 3px solid var(--color-fuel); padding-left: var(--space-4); }
  .term-meta div { display: grid; grid-template-columns: 5.5rem 1fr; gap: var(--space-2); }
  .term-meta dt { color: var(--color-muted); font-size: var(--step--1); }
  .term-meta dd { font-weight: 600; }
  .term-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.36fr); gap: var(--space-7); align-items: start; padding-top: var(--space-6); }
  .term-article { max-width: 48rem; }
  .term-article :is(h2, h3) { scroll-margin-top: 8rem; }
  .term-article strong { color: var(--color-trust-dark); font-weight: 700; }
  .article-outline { max-width: 48rem; margin-bottom: var(--space-5); border-block: 1px solid var(--color-line); padding-block: var(--space-3); }
  .article-outline > strong { display: block; margin-bottom: var(--space-2); }
  .article-outline ol { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-4); margin: 0; padding-left: 1.25rem; color: var(--color-muted); font-size: var(--step--1); }
  .article-outline a { color: var(--color-trust-dark); font-weight: 600; }
  .source-card { position: sticky; top: 7rem; border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-4); background: var(--color-sand); }
  .source-card__kicker { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; letter-spacing: 0.1em; }
  .source-card__title { margin-top: var(--space-1); font-family: var(--font-display); font-size: var(--step-1); }
  .source-card__link { display: block; margin-top: var(--space-3); color: var(--color-trust-dark); font-weight: 700; }
  .source-card__date { margin-top: var(--space-3); color: var(--color-muted); font-size: var(--step--1); }
  .source-card__related { display: grid; gap: var(--space-1); margin-top: var(--space-4); padding-top: var(--space-3); border-top: 1px solid var(--color-line); font-size: var(--step--1); }

  .directory-intro {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
    border-block: 1px solid var(--color-line);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    background: var(--color-paper-raised);
  }
  .directory-intro p { max-width: 48rem; color: var(--color-ink-soft); }
  .directory-intro .button { flex: none; text-decoration: none; }
  .etf-filters { display: grid; grid-template-columns: repeat(2, minmax(0, 15rem)); gap: var(--space-3); margin: 0 0 var(--space-4); border: 0; padding: 0; }
  .etf-filters legend { grid-column: 1 / -1; margin-bottom: var(--space-1); font-weight: 700; }
  .etf-filters .field { margin: 0; }

  .etf-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-3); }
  .etf-card {
    display: flex;
    min-height: 23rem;
    flex-direction: column;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    background: var(--color-paper-raised);
    box-shadow: var(--shadow-card);
    transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease, transform var(--motion-base) var(--ease-out);
  }
  .etf-card:hover, .etf-card:focus-within { border-color: var(--color-trust); box-shadow: 0 22px 55px rgb(23 48 71 / 13%); transform: translateY(-0.2rem); }
  .etf-card__topline, .etf-hero__topline { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
  .etf-card__symbol, .etf-hero__symbol { color: var(--color-fuel-dark); font-size: var(--step-1); font-weight: 700; font-variant-numeric: tabular-nums; }
  .status-badge { border-radius: 999px; padding: 0.25rem 0.65rem; background: color-mix(in srgb, var(--color-trust) 15%, var(--color-paper)); color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .status-badge--quiet { background: var(--color-sand); color: var(--color-muted); }
  .status-badge--verified { background: color-mix(in srgb, var(--color-trust) 18%, var(--color-paper)); color: var(--color-trust-dark); }
  .status-badge--pending { background: color-mix(in srgb, var(--color-fuel) 24%, var(--color-paper)); color: var(--color-fuel-dark); }
  .etf-card__title { margin-top: var(--space-2); font-family: var(--font-display); font-size: var(--step-1); line-height: 1.25; }
  .etf-card__title a { text-decoration: none; }
  .etf-card__category { margin-top: var(--space-1); color: var(--color-muted); font-size: var(--step--1); }
  .etf-card__facts { display: grid; gap: var(--space-2); margin-top: var(--space-4); padding-block: var(--space-3); border-block: 1px solid var(--color-line); }
  .etf-card__facts div { display: grid; grid-template-columns: 6.5rem 1fr; gap: var(--space-2); }
  .etf-card__facts dt { color: var(--color-muted); font-size: var(--step--1); }
  .etf-card__facts dd { font-size: var(--step--1); font-weight: 600; }
  .etf-card__focus { margin-top: var(--space-3); color: var(--color-ink-soft); font-size: var(--step--1); }
  .etf-card__action { margin-top: auto; padding-top: var(--space-4); font-weight: 700; }

  .method-note { margin-top: var(--space-5); border-left: 0.3rem solid var(--color-fuel); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: var(--space-3) var(--space-4); background: var(--color-sand); }
  .method-note p { margin-top: var(--space-1); color: var(--color-ink-soft); }
  .method-note span { display: block; margin-top: var(--space-2); color: var(--color-muted); font-size: var(--step--1); }
  .review-state-panel { margin-bottom: var(--space-4); border-left: 0.3rem solid var(--color-fuel); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: var(--space-3) var(--space-4); background: var(--color-sand); }
  .review-state-panel p, .fee-panel__note { margin-top: var(--space-1); color: var(--color-muted); }
  .fee-panel--snapshot { max-width: 42rem; }

  .etf-hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-5); align-items: end; padding-block: var(--space-6); border-bottom: 1px solid var(--color-line); }
  .etf-hero__title { margin-top: var(--space-2); font-family: var(--font-display); font-size: var(--step-4); line-height: 1.1; letter-spacing: -0.045em; }
  .etf-hero__legal { margin-top: var(--space-2); color: var(--color-muted); }
  .etf-hero__focus { max-width: 52rem; margin-top: var(--space-4); font-size: var(--step-1); font-weight: 600; }
  .etf-hero .button { text-decoration: none; }

  .fact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin-top: var(--space-5); overflow: hidden; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: var(--color-line); }
  .fact-grid div { min-width: 0; padding: var(--space-4); background: var(--color-paper-raised); }
  .fact-grid dt { color: var(--color-muted); font-size: var(--step--1); }
  .fact-grid dd { margin-top: var(--space-1); font-weight: 600; overflow-wrap: anywhere; }

  .etf-section { padding-top: var(--space-7); }
  .etf-reading-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4); }
  .etf-reading-card { position: relative; overflow: hidden; border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-5); background: var(--color-paper-raised); box-shadow: var(--shadow-card); transition: transform var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast); }
  .etf-reading-card:hover, .etf-reading-card:focus-within { border-color: var(--color-trust); box-shadow: 0 20px 46px rgb(23 48 71 / 12%); transform: translateY(-0.18rem); }
  .etf-reading-card__index { display: inline-grid; width: 2rem; height: 2rem; place-items: center; border-radius: 999px; background: color-mix(in srgb, var(--color-fuel) 22%, var(--color-paper)); color: var(--color-fuel-dark); font-size: var(--step--1); font-weight: 800; font-variant-numeric: tabular-nums; }
  .etf-reading-card h3 { margin-top: var(--space-3); font-family: var(--font-display); font-size: var(--step-1); }
  .etf-reading-card p { margin-top: var(--space-2); color: var(--color-ink-soft); }
  .etf-reading-card__note { border-top: 1px solid var(--color-line); padding-top: var(--space-2); font-size: var(--step--1); }
  .fee-review-state { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); background: var(--color-paper-raised); }
  .fee-review-state p { color: var(--color-ink-soft); }
  .fee-review-state a { margin-left: auto; color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .fee-review-state--verified { border-left: 0.3rem solid var(--color-trust); }
  .fee-review-state--pending { align-items: flex-start; flex-wrap: wrap; border-left: 0.3rem solid var(--color-fuel); background: var(--color-sand); }
  .fee-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
  .fee-panel { overflow: hidden; border: 1px solid var(--color-line); border-radius: var(--radius-md); background: var(--color-paper-raised); }
  .fee-panel h3 { padding: var(--space-3) var(--space-4); background: #173047; color: #fbf9f3; font-size: var(--step-1); }
  .fee-table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
  .fee-table th, .fee-table td { padding: 0.8rem 1rem; border-bottom: 1px solid var(--color-line); text-align: left; vertical-align: top; }
  .fee-table th { color: var(--color-muted); font-size: var(--step--1); }
  .fee-table th:last-child, .fee-table td:last-child { width: 6rem; text-align: right; font-weight: 700; }
  .fee-table tbody tr:last-child td { border-bottom: 0; }
  .expense-details { max-width: 42rem; margin-top: var(--space-4); border: 1px solid var(--color-line); border-radius: var(--radius-md); background: var(--color-paper-raised); }
  .expense-details summary { cursor: pointer; padding: var(--space-3) var(--space-4); color: var(--color-muted); font-weight: 700; transition: background-color var(--motion-fast), color var(--motion-fast); }
  .expense-details summary:hover, .expense-details summary:focus-visible { background: var(--color-sand); color: var(--color-ink); }
  .expense-details[open] summary { border-bottom: 1px solid var(--color-line); color: var(--color-ink); }
  .expense-details .fee-panel { border: 0; border-radius: 0 0 var(--radius-md) var(--radius-md); }
  .expense-details .fee-panel__note { padding: 0 var(--space-4) var(--space-4); }
  .etf-detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.45fr); gap: var(--space-7); align-items: start; }
  .risk-list { display: grid; gap: var(--space-3); max-width: 48rem; padding-left: 1.25rem; }
  .risk-list li::marker { color: var(--color-fuel-dark); }
  .source-list { display: grid; gap: var(--space-3); margin: var(--space-3) 0 0; padding: 0; list-style: none; }
  .source-list li { display: grid; gap: 0.25rem; padding-top: var(--space-3); border-top: 1px solid var(--color-line); }
  .source-list a { color: var(--color-trust-dark); font-weight: 700; }
  .source-list span { color: var(--color-muted); font-size: 0.78rem; }
  .related-concepts { padding-bottom: var(--space-7); }
  .related-concepts__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-3); }
  .related-concepts__grid a { display: grid; gap: var(--space-1); border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-4); background: var(--color-paper-raised); text-decoration: none; transition: transform var(--motion-fast), border-color var(--motion-fast), box-shadow var(--motion-fast); }
  .related-concepts__grid a:hover, .related-concepts__grid a:focus-visible { border-color: var(--color-trust); box-shadow: var(--shadow-card); transform: translateY(-0.15rem); }
  .related-concepts__grid strong { color: var(--color-trust-dark); }
  .related-concepts__grid span { color: var(--color-muted); font-size: var(--step--1); }

  .compare-picker { margin: 0; border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: clamp(1.25rem, 3vw, 2rem); background: var(--color-paper-raised); box-shadow: var(--shadow-card); }
  .compare-picker legend { padding-inline: 0.5rem; font-family: var(--font-display); font-size: var(--step-2); font-weight: 700; }
  .compare-picker__hint { color: var(--color-muted); }
  .compare-picker__filter { max-width: 32rem; margin-top: var(--space-3); }
  .compare-selection { margin-top: var(--space-3); border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-3); background: var(--color-sand); }
  .compare-selection__heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
  .compare-selection__clear { border: 0; padding: 0.3rem 0.45rem; background: transparent; color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; cursor: pointer; }
  .compare-selection__clear:hover, .compare-selection__clear:focus-visible { text-decoration: underline; }
  .compare-selection__clear:disabled { cursor: not-allowed; opacity: 0.5; text-decoration: none; }
  .compare-selection__list { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-2); }
  .compare-selection__empty { color: var(--color-muted); font-size: var(--step--1); }
  .selected-etf-chip { display: inline-flex; align-items: center; gap: var(--space-2); border: 1px solid var(--color-trust); border-radius: 999px; padding: 0.48rem 0.55rem 0.48rem 0.8rem; background: var(--color-paper-raised); color: var(--color-ink); font-size: var(--step--1); font-weight: 700; cursor: pointer; transition: border-color var(--motion-fast), background-color var(--motion-fast), transform var(--motion-fast); }
  .selected-etf-chip:hover, .selected-etf-chip:focus-visible { border-color: var(--color-fuel-dark); background: color-mix(in srgb, var(--color-fuel) 12%, var(--color-paper-raised)); }
  .selected-etf-chip:active { transform: scale(0.97); }
  .selected-etf-chip__remove { display: inline-grid; width: 1.4rem; height: 1.4rem; place-items: center; border-radius: 999px; background: var(--color-trust); color: #fff; font-size: 1rem; line-height: 1; }
  .compare-picker__grid { display: grid; max-height: 32rem; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); margin-top: var(--space-4); padding-right: var(--space-2); overflow-y: auto; }
  .compare-option { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); align-items: center; border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-3); cursor: pointer; transition: border-color var(--motion-fast) ease, background-color var(--motion-fast) ease, box-shadow var(--motion-fast) ease, transform var(--motion-fast) var(--ease-out); }
  .compare-option:hover { border-color: var(--color-trust); box-shadow: 0 8px 22px rgb(23 48 71 / 8%); transform: translateY(-0.1rem); }
  .compare-option:focus-within { border-color: var(--color-focus); }
  .compare-option:active { transform: scale(0.99); }
  .compare-option:has(input:checked) { border-color: var(--color-fuel-dark); background: color-mix(in srgb, var(--color-fuel) 12%, var(--color-paper-raised)); }
  .compare-option input { width: 1.25rem; height: 1.25rem; accent-color: var(--color-trust); }
  .compare-option span { display: grid; gap: 0.15rem; }
  .compare-option small { color: var(--color-muted); }
  .compare-toolbar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-block: var(--space-4); }
  .compare-toolbar p { color: var(--color-muted); }
  .button--secondary { border: 1px solid var(--color-line); background: var(--color-paper-raised); color: var(--color-ink); }
  .button:disabled { cursor: not-allowed; opacity: 0.55; }
  .comparison-output .empty-state { display: grid; gap: var(--space-1); }
  .comparison-table-wrap { overflow-x: auto; border: 1px solid var(--color-line); border-radius: var(--radius-lg); background: var(--color-paper-raised); box-shadow: var(--shadow-card); }
  .comparison-table { width: 100%; min-width: 52rem; border-collapse: collapse; font-size: var(--step--1); }
  .comparison-table caption { padding: var(--space-3); text-align: left; color: var(--color-muted); font-weight: 700; }
  .comparison-table th, .comparison-table td { min-width: 14rem; padding: var(--space-3); border-top: 1px solid var(--color-line); border-right: 1px solid var(--color-line); text-align: left; vertical-align: top; }
  .comparison-table th:first-child { position: sticky; left: 0; z-index: 1; min-width: 9rem; background: var(--color-sand); }
  .comparison-table thead th { background: #173047; color: #fbf9f3; }
  .comparison-table thead th:first-child { z-index: 2; background: #173047; }
  .comparison-table thead a { display: grid; gap: 0.2rem; color: inherit; text-decoration: none; }
  .comparison-table thead strong { color: var(--color-fuel); font-size: var(--step-1); font-variant-numeric: tabular-nums; }
  .comparison-table td a { color: var(--color-trust-dark); font-weight: 700; }

  .search-panel { border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: clamp(1.25rem, 3vw, 2rem); background: var(--color-paper-raised); box-shadow: var(--shadow-card); }
  .search-form { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-3); align-items: end; }
  .search-form .field { margin: 0; }
  .search-form__input { min-height: 3.4rem; font-size: var(--step-0); }
  .search-form .button { min-height: 3.4rem; }
  .search-summary { margin-top: var(--space-3); color: var(--color-muted); }
  .search-results { display: grid; gap: var(--space-3); margin-top: var(--space-5); }
  .search-result { border: 1px solid var(--color-line); border-radius: var(--radius-md); padding: var(--space-4); background: var(--color-paper-raised); transition: border-color var(--motion-base) ease, box-shadow var(--motion-base) ease, transform var(--motion-base) var(--ease-out); }
  .search-result:hover, .search-result:focus-within { border-color: var(--color-trust); box-shadow: var(--shadow-card); transform: translateY(-0.12rem); }
  .search-result__category { color: var(--color-trust-dark); font-size: var(--step--1); font-weight: 700; }
  .search-result__title { margin-top: var(--space-1); font-family: var(--font-display); font-size: var(--step-1); line-height: 1.3; }
  .search-result__title a { text-decoration: none; }
  .search-result__excerpt { margin-top: var(--space-2); color: var(--color-ink-soft); }
  .search-result__excerpt mark { border-radius: 0.2rem; padding-inline: 0.12em; background: var(--color-fuel); color: #173047; }

  @media (min-width: 58.0625rem) {
    .listing-card__visual img { scale: 1.06; }
    .listing-card:hover .listing-card__visual img { scale: 1.095; }
  }

  @media (max-width: 58rem) {
    .home-hero__inner { grid-template-columns: 1fr; }
    .supply-route { grid-template-columns: repeat(3, 1fr); }
    .supply-stop { grid-template-columns: 1fr; }
    .supply-stop__number { grid-row: auto; }
    .service-grid { grid-template-columns: 1fr; }
    .question-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .proof-panel { grid-template-columns: 1fr; }
    .service-card { min-height: 0; }
    .listing-grid { grid-template-columns: 1fr; }
    .listing-card { min-height: 15rem; }
    .tool-layout { grid-template-columns: 1fr; }
    .result-panel { position: static; }
    .glossary-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .term-hero, .term-layout { grid-template-columns: 1fr; }
    .source-card { position: static; }
    .etf-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .etf-card { min-height: 24rem; }
    .etf-hero { grid-template-columns: 1fr; }
    .fact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .etf-reading-grid { grid-template-columns: 1fr; }
    .fee-grid, .etf-detail-grid { grid-template-columns: 1fr; }
    .related-concepts__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  }

  @media (max-width: 52rem) {
    .site-header__inner { min-height: 4.5rem; }
    .brand-link { flex-basis: 15rem; }
    .nav-toggle { display: inline-flex; }
    .site-nav {
      position: absolute;
      inset: calc(100% + 1px) 1rem auto;
      display: none;
      flex-direction: column;
      align-items: stretch;
      border: 1px solid var(--color-line);
      border-radius: var(--radius-md);
      padding: 0.5rem;
      background: var(--color-paper-raised);
      box-shadow: var(--shadow-card);
    }
    .site-nav[data-open="true"] { display: flex; }
  }

  @media (max-width: 46rem) {
    .site-search__control { flex-direction: column; }
    .supply-route { grid-template-columns: 1fr; }
    .site-footer__inner { grid-template-columns: 1fr; }
    .site-footer__notice { grid-column: auto; }
    .field-grid, .result-grid { grid-template-columns: 1fr; }
    .lot-grid { grid-template-columns: 1fr; }
    .lot-grid__heading { border-top: 1px solid var(--color-line); padding-top: var(--space-3); }
    .filter-bar { align-items: stretch; flex-direction: column; }
    .directory-group__summary { gap: var(--space-2); padding: var(--space-3); }
    .directory-group__content { padding: var(--space-3); }
    .glossary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .directory-intro, .compare-toolbar { align-items: stretch; flex-direction: column; }
    .directory-intro .button, .compare-toolbar .button { text-align: center; }
    .etf-filters { grid-template-columns: 1fr; }
    .etf-filters legend { grid-column: auto; }
    .fact-grid, .compare-picker__grid { grid-template-columns: 1fr; }
    .etf-grid { grid-template-columns: 1fr; }
    .fee-review-state { align-items: flex-start; flex-direction: column; }
    .fee-review-state a { margin-left: 0; }
    .related-concepts__grid { grid-template-columns: 1fr; }
    .search-form { grid-template-columns: 1fr; }
    .question-grid, .proof-metrics { grid-template-columns: 1fr; }
    .consent-banner { grid-template-columns: 1fr; }
    .service-card__header { min-height: 8.5rem; }
    .service-card__visual { width: clamp(7rem, 32vw, 8.5rem); }
    .listing-card {
      display: grid;
      min-height: 0;
      grid-template-columns: 6.5rem minmax(0, 1fr);
      grid-template-areas:
        "visual meta"
        "visual title"
        "visual description"
        "visual action";
      column-gap: var(--space-3);
      padding: var(--space-3);
    }
    .listing-card__visual { grid-area: visual; width: 100%; aspect-ratio: 1; align-self: start; margin: 0; border: 1px solid var(--color-line); border-radius: var(--radius-md); }
    .listing-card__meta { grid-area: meta; }
    .listing-card__title { grid-area: title; margin-top: 0.2rem; font-size: var(--step-1); }
    .listing-card__description { grid-area: description; display: -webkit-box; margin-top: 0.4rem; overflow: hidden; font-size: var(--step--1); -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
    .listing-card__action { grid-area: action; margin-top: 0.55rem; padding-top: 0; font-size: var(--step--1); }
  }

  @media (max-width: 24rem) {
    .page-shell { width: min(calc(100% - 1.2rem), var(--page-width)); }
    .brand-link { flex-basis: 12.5rem; }
    .nav-toggle__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
    .home-hero__inner { padding: 1.5rem 1.1rem; }
    .home-hero__title { font-size: clamp(2.25rem, 12vw, 3rem); }
    .back-to-top span:last-child { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
    .listing-card { grid-template-columns: 5.75rem minmax(0, 1fr); }
  }

  @media (max-width: 20.5rem) {
    .glossary-grid { grid-template-columns: 1fr; }
  }
}

@layer utilities {
  [hidden] { display: none; }

  .u-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
}

@view-transition { navigation: auto; }

::view-transition-old(root) { animation: 120ms ease both page-fade-out; }
::view-transition-new(root) { animation: 220ms cubic-bezier(0.2, 0.8, 0.2, 1) both page-fade-in; }

@keyframes page-fade-out {
  to { opacity: 0; }
}

@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(0.35rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto; transition-duration: 0.01ms; animation-duration: 0.01ms; animation-iteration-count: 1; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}