/* ---------- tokens ---------- */
  :root {
    --bg: #F8F7F4;
    --ink: #1A1A1A;
    --muted: #5A5A5A;
    --accent: #D62828;
    --line: #E5E3DC;
    --line-strong: #D7D4CA;

    --serif: "Instrument Serif", "Times New Roman", Georgia, serif;
    --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    --measure: 62ch;
    --pad-x: 24px;
    --max-w: 1200px;
  }
  @media (min-width: 900px) {
    :root { --pad-x: 56px; }
  }

  /* ---------- reset ---------- */
  *, *::before, *::after { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  img, svg { display: block; max-width: 100%; }
  a { color: inherit; text-decoration: none; }
  a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
  }
  ::selection { background: #1A1A1A; color: var(--bg); }

  /* ---------- accessibility ---------- */
  .skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--ink);
    color: var(--bg);
    padding: 10px 14px;
    font-size: 14px;
    z-index: 100;
  }
  .skip-link:focus { left: 12px; top: 12px; }

  .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;
  }

  /* ---------- layout primitive ---------- */
  .wrap {
    max-width: var(--max-w);
    margin: 0 auto;
    padding-left: var(--pad-x);
    padding-right: var(--pad-x);
  }

  /* ---------- nav ---------- */
  .nav {
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 50;
  }
  .nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }
  .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 15px;
    letter-spacing: -0.01em;
  }
  .logo__mark {
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--accent);
    position: relative;
    flex-shrink: 0;
  }
  .logo__mark::after {
    content: "";
    position: absolute;
    inset: 6px;
    background: var(--bg);
    border-radius: 50%;
  }
  .nav__links {
    display: none;
    gap: 28px;
    font-size: 14px;
    color: var(--muted);
  }
  .nav__links a:hover { color: var(--ink); }
  @media (min-width: 720px) {
    .nav__links { display: flex; }
    .nav__toggle { display: none; }
  }
  .nav__toggle {
    appearance: none;
    background: transparent;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    padding: 8px 14px;
    font-family: var(--sans);
    font-size: 13px;
    color: var(--ink);
    cursor: pointer;
    min-height: 36px;
  }
  .nav__panel {
    display: none;
    border-top: 1px solid var(--line);
    background: var(--bg);
  }
  .nav__panel.is-open { display: block; }
  .nav__panel a {
    display: block;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }
  .nav__panel a:last-child { border-bottom: 0; }

  /* ---------- buttons ---------- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 22px;
    border-radius: 999px;
    font-family: var(--sans);
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    transition: background 120ms ease, color 120ms ease, border-color 120ms ease, transform 120ms ease;
    min-width: 44px;
    border: 1px solid transparent;
  }
  .btn--primary {
    background: var(--accent);
    color: #fff;
  }
  .btn--primary:hover { background: #B91F1F; }
  .btn--primary:active { transform: translateY(1px); }
  .btn--ghost {
    background: transparent;
    color: var(--ink);
    border-color: var(--line-strong);
  }
  .btn--ghost:hover { border-color: var(--ink); }
  .btn--text {
    background: transparent;
    color: var(--ink);
    padding: 0 4px;
    height: auto;
    border-radius: 0;
    border-bottom: 1px solid var(--ink);
    border-radius: 0;
    line-height: 1.6;
  }

  /* ---------- hero ---------- */
  .hero {
    padding: 56px 0 72px;
    position: relative;
  }
  .hero__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
  }
  @media (min-width: 900px) {
    .hero { padding: 96px 0 120px; }
    .hero__grid {
      grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
      gap: 72px;
    }
  }
  .eyebrow {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 24px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
  }
  .eyebrow::before {
    content: "";
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    display: inline-block;
  }
  .h-display {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(48px, 9vw, 96px);
    line-height: 0.98;
    letter-spacing: -0.02em;
    margin: 0 0 24px;
    text-wrap: balance;
  }
  /* Mobile only: shrink the hero H1 and reserve space on the right
     for the floating hero logo. Doesn't affect h-display anywhere else. */
  .hero .h-display {
    font-size: clamp(38px, 10vw, 72px);
    padding-right: 122px;
    min-height: 110px;
  }
  @media (min-width: 900px) {
    .hero .h-display {
      font-size: clamp(48px, 9vw, 96px);
      padding-right: 0;
      min-height: 0;
    }
  }
  .h-display em {
    font-style: italic;
    color: var(--accent);
  }
  .hero__sub {
    font-size: 18px;
    line-height: 1.5;
    color: var(--muted);
    max-width: 36ch;
    margin: 0 0 36px;
  }
  @media (min-width: 900px) {
    .hero__sub { font-size: 20px; }
  }
  .hero__ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
  }
  .hero__meta {
    margin-top: 28px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.02em;
  }
  .hero__meta span { color: var(--ink); }

  /* image panel */
  .photo {
    position: relative;
    aspect-ratio: 4 / 5;
    border-radius: 4px;
    overflow: hidden;
    background: #ECE9E0;
    border: 1px solid var(--line);
  }
  .photo--hero {
    /* Mobile: small logo floated top-right next to the headline,
       so users don't have to scroll past a giant hero image. */
    position: absolute;
    top: 56px;
    right: 16px;
    width: 110px;
    height: 110px;
    aspect-ratio: 1 / 1;
    margin: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    overflow: visible;
    z-index: 1;
  }
  .photo--hero img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
  }
  .photo--hero .photo__caption { display: none; }
  @media (min-width: 900px) {
    /* Desktop: revert to the natural side-by-side grid layout. */
    .photo--hero {
      position: static;
      width: auto;
      height: auto;
      aspect-ratio: 5 / 6;
      top: auto;
      right: auto;
    }
  }

  /* ---------- live-at row ---------- */
  .live-at {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    flex-wrap: wrap;
  }
  .live-at__label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .live-at__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 24px;
    align-items: center;
    flex-wrap: wrap;
  }
  .live-at__list a {
    display: inline-flex;
    align-items: center;
    opacity: 0.7;
    transition: opacity 160ms ease;
  }
  .live-at__list a:hover { opacity: 1; }
  .live-at__list img {
    height: 49px;
    width: auto;
    display: block;
    filter: brightness(0);
  }
  .photo svg.placeholder {
    width: 100%; height: 100%;
    display: block;
  }
  .photo__caption {
    position: absolute;
    left: 12px; bottom: 12px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink);
    background: rgba(248,247,244,0.92);
    padding: 6px 10px;
    border-radius: 2px;
    letter-spacing: 0.02em;
  }

  /* ---------- section primitives ---------- */
  .section {
    padding: 80px 0;
    border-top: 1px solid var(--line);
  }
  @media (min-width: 900px) {
    .section { padding: 128px 0; }
  }
  .section__label {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 24px;
  }
  .h-section {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1.05;
    letter-spacing: -0.015em;
    margin: 0 0 24px;
    text-wrap: balance;
  }
  .prose p {
    font-size: 17px;
    line-height: 1.6;
    color: var(--ink);
    max-width: var(--measure);
    margin: 0 0 1em;
  }
  @media (min-width: 900px) {
    .prose p { font-size: 19px; }
  }

  /* ---------- problem ---------- */
  .problem__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
  }
  @media (min-width: 900px) {
    .problem__grid {
      grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
      gap: 80px;
      align-items: start;
    }
  }
  .chart {
    border: 1px solid var(--line);
    background: #FBFAF7;
    padding: 24px;
    border-radius: 4px;
  }
  .chart__title {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 4px;
  }
  .chart__subtitle {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--muted);
    margin: 0 0 24px;
  }
  .bar {
    display: grid;
    grid-template-columns: 110px 1fr 56px;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 13px;
  }
  .bar__label { color: var(--ink); font-weight: 500; }
  .bar__track {
    height: 14px;
    background: var(--line);
    position: relative;
    border-radius: 1px;
    overflow: hidden;
  }
  .bar__fill {
    position: absolute;
    inset: 0 auto 0 0;
    background: var(--ink);
    width: var(--w, 0%);
  }
  .bar__fill--accent { background: var(--accent); }
  .bar__value {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
    text-align: right;
  }
  .chart__foot {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.02em;
  }

  /* ---------- how it works ---------- */
  .steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    margin-top: 24px;
  }
  @media (min-width: 900px) {
    .steps {
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 56px;
      margin-top: 64px;
    }
  }
  .step {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .step__illus {
    aspect-ratio: 5 / 4;
    border: 1px solid var(--line);
    background: #FBFAF7;
    border-radius: 4px;
    overflow: hidden;
  }
  .step__num {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent);
  }
  .step__title {
    font-family: var(--serif);
    font-weight: 400;
    font-size: 28px;
    line-height: 1.15;
    letter-spacing: -0.01em;
    margin: 0;
    text-wrap: balance;
  }
  .step__body {
    color: var(--muted);
    font-size: 16px;
    margin: 0;
    max-width: 32ch;
  }

  /* ---------- university CTA ---------- */
  .uni {
    background: #EFEDE5;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }
  .uni__inner {
    max-width: 760px;
  }
  .uni__form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 36px;
  }
  @media (min-width: 640px) {
    .uni__form {
      flex-direction: row;
      gap: 8px;
      align-items: stretch;
    }
  }
  .uni__input {
    flex: 1;
    height: 48px;
    padding: 0 18px;
    border: 1px solid var(--line-strong);
    background: var(--bg);
    border-radius: 999px;
    font-family: var(--sans);
    font-size: 15px;
    color: var(--ink);
    min-width: 0;
  }
  .uni__input::placeholder { color: var(--muted); }
  .uni__input:focus { border-color: var(--ink); }
  .uni__form .btn { white-space: nowrap; }
  .uni__fine {
    margin-top: 18px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.02em;
  }
  .uni__status {
    margin-top: 14px;
    font-size: 13px;
    color: var(--accent);
    min-height: 1em;
  }

  /* ---------- about ---------- */
  .about__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    align-items: start;
  }
  @media (min-width: 900px) {
    .about__grid {
      grid-template-columns: 220px 1fr;
      gap: 80px;
    }
  }
  .about__portrait {
    width: 96px; height: 96px;
    border-radius: 50%;
    background: #ECE9E0;
    border: 1px solid var(--line);
    overflow: hidden;
  }
  @media (min-width: 900px) {
    .about__portrait { width: 140px; height: 140px; }
  }
  .about__prose {
    max-width: 60ch;
  }
  .about__more {
    margin-top: 8px;
    display: inline-block;
  }

  /* ---------- FAQ ---------- */
  .faq__list {
    margin-top: 24px;
    border-top: 1px solid var(--line);
  }
  @media (min-width: 900px) {
    .faq__list { margin-top: 56px; }
  }
  .faq__item {
    border-bottom: 1px solid var(--line);
  }
  .faq__item summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 40px 22px 0;
    position: relative;
    font-family: var(--serif);
    font-size: 22px;
    line-height: 1.25;
    letter-spacing: -0.01em;
  }
  @media (min-width: 900px) {
    .faq__item summary { font-size: 26px; padding: 28px 60px 28px 0; }
  }
  .faq__item summary::-webkit-details-marker { display: none; }
  .faq__item summary::after {
    content: "";
    position: absolute;
    right: 4px;
    top: 50%;
    width: 14px; height: 14px;
    margin-top: -7px;
    background:
      linear-gradient(var(--ink),var(--ink)) center/100% 1px no-repeat,
      linear-gradient(var(--ink),var(--ink)) center/1px 100% no-repeat;
    transition: transform 160ms ease;
  }
  .faq__item[open] summary::after {
    background: linear-gradient(var(--ink),var(--ink)) center/100% 1px no-repeat;
  }
  .faq__answer {
    padding: 0 0 24px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.6;
    max-width: var(--measure);
  }
  @media (min-width: 900px) {
    .faq__answer { font-size: 18px; padding-bottom: 32px; }
  }

  /* ---------- footer ---------- */
  .foot {
    border-top: 1px solid var(--line);
    padding: 56px 0 48px;
    background: var(--bg);
  }
  .foot__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
  }
  @media (min-width: 900px) {
    .foot__grid {
      grid-template-columns: 1.4fr 1fr 1.6fr;
      gap: 56px;
    }
  }
  .foot__desc {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 14px;
    max-width: 30ch;
  }
  .foot__copy {
    margin-top: 18px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.02em;
  }
  .foot__col h4 {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    font-weight: 500;
    margin: 0 0 16px;
  }
  .foot__col ul {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .foot__col a { font-size: 14px; }
  .foot__col a:hover { color: var(--accent); }
  .foot__fine {
    font-size: 12px;
    font-family: var(--mono);
    color: var(--muted);
    letter-spacing: 0.02em;
    line-height: 1.6;
  }

  /* ---------- placeholder svgs ---------- */
  .ph-fill { fill: #ECE9E0; }
  .ph-stripe { stroke: #DCD8CB; }
  .ph-label {
    font-family: var(--mono);
    font-size: 11px;
    fill: #6E6E6E;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }