@layer reset, base, layout, components, responsive;

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

@layer base {
  :root {
    --night: #090d1c;
    --indigo: #11182d;
    --indigo-soft: #18223d;
    --gold: #c6a45a;
    --gold-bright: #e3c984;
    --ivory: #eee7d5;
    --muted: #bcb6a6;
    --line: rgba(198, 164, 90, .42);
    --faint: rgba(238, 231, 213, .09);
    --page-pad: clamp(1.15rem, 5vw, 5.25rem);
    --serif: Georgia, "Times New Roman", Times, serif;
    --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  }

  body {
    min-width: 320px;
    overflow-x: hidden;
    color: var(--ivory);
    background:
      radial-gradient(circle at 78% 8%, rgba(46, 63, 107, .32), transparent 28rem),
      var(--night);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
  }

  body::before {
    content: "";
    position: fixed;
    z-index: 10;
    inset: 0;
    pointer-events: none;
    opacity: .23;
    background-image:
      radial-gradient(circle at 11% 17%, var(--gold-bright) 0 1px, transparent 1.5px),
      radial-gradient(circle at 88% 26%, var(--ivory) 0 1px, transparent 1.5px),
      radial-gradient(circle at 51% 71%, var(--gold) 0 1px, transparent 1.5px),
      radial-gradient(circle at 27% 86%, var(--ivory) 0 1px, transparent 1.5px);
    background-size: 211px 223px, 283px 271px, 337px 311px, 401px 383px;
  }

  a { color: inherit; text-underline-offset: .3em; }
  a:hover { color: var(--gold-bright); }
  :focus-visible { outline: 3px solid var(--gold-bright); outline-offset: 5px; }
  ::selection { color: var(--night); background: var(--gold-bright); }

  h1, h2, h3 { font-family: var(--serif); font-weight: 400; }
  h2 { max-width: 14ch; font-size: clamp(2.3rem, 5vw, 5rem); line-height: .99; letter-spacing: -.035em; }
  p { max-width: 68ch; }
  strong { color: #fff8df; }
  code { color: var(--gold-bright); font: .88em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
}

@layer layout {
  .site-header {
    position: relative;
    z-index: 20;
    display: flex;
    min-height: 78px;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding: .85rem var(--page-pad);
    border-bottom: 1px solid var(--line);
    background: rgba(9, 13, 28, .94);
  }

  .site-header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: clamp(1rem, 3vw, 2.8rem); }
  .site-header nav a { color: var(--muted); font-size: .68rem; font-weight: 700; letter-spacing: .16em; text-decoration: none; }
  .site-header nav a:hover { color: var(--gold-bright); }

  .hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.16fr) minmax(400px, .84fr);
    min-height: calc(100svh - 78px);
    border-bottom: 1px solid var(--line);
    background: var(--indigo);
  }

  .hero-image {
    min-height: 700px;
    background: linear-gradient(90deg, transparent 75%, var(--indigo)), url("/assets/empty-chair-observatory.webp") 49% center / cover no-repeat;
  }

  .hero-copy {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: clamp(3.5rem, 8vw, 8rem) var(--page-pad) 5rem clamp(1rem, 3.5vw, 4rem);
  }

  .hero-copy::before {
    content: "";
    position: absolute;
    width: min(32vw, 430px);
    aspect-ratio: 1;
    left: 3%;
    top: 50%;
    translate: 0 -50%;
    border: 1px solid var(--line);
    border-radius: 50%;
    box-shadow: 0 0 0 36px rgba(198,164,90,.035), 0 0 0 37px var(--line), 0 0 0 78px rgba(198,164,90,.025), 0 0 0 79px var(--line);
    opacity: .45;
    pointer-events: none;
  }

  .hero h1 { position: relative; font-size: clamp(3.8rem, 7.6vw, 8.7rem); line-height: .78; letter-spacing: -.055em; }
  .hero h1 em { color: var(--gold-bright); font-style: italic; }
  .russian-name { margin: 1rem 0 1.1rem; color: var(--gold); font-family: var(--serif); font-size: clamp(.9rem, 1.4vw, 1.2rem); letter-spacing: .26em; }
  .tagline { position: relative; margin-top: 2rem; color: #fff8e8; font-family: var(--serif); font-size: clamp(1.35rem, 2.4vw, 2rem); font-style: italic; line-height: 1.35; }
  .hero-caption { position: absolute; z-index: 3; left: var(--page-pad); bottom: 1.1rem; color: var(--muted); font-size: .62rem; letter-spacing: .18em; }

  .ruled-section {
    display: grid;
    grid-template-columns: 70px minmax(250px, .75fr) minmax(300px, 1fr);
    gap: clamp(1.5rem, 5vw, 6rem);
    padding: clamp(5rem, 9vw, 9rem) var(--page-pad);
    border-bottom: 1px solid var(--line);
    background-image: linear-gradient(90deg, transparent calc(50% - .5px), rgba(198,164,90,.06) 50%, transparent calc(50% + .5px));
    background-size: 19vw 100%;
  }

  .myth, .articles, .traces, .limits { padding: clamp(5rem, 10vw, 10rem) var(--page-pad); border-bottom: 1px solid var(--line); }
  .section-heading { display: grid; grid-template-columns: .7fr 1.3fr; gap: 2rem 6vw; align-items: end; margin-bottom: clamp(3rem, 6vw, 6rem); }
  .section-heading .eyebrow { align-self: start; }
  .section-heading h2 { grid-column: 2; }
  .section-heading > p:last-child:not(.eyebrow) { grid-column: 2; color: var(--muted); font-family: var(--serif); font-size: 1.1rem; }
  .section-heading.compact { align-items: start; }

  .myth { background: linear-gradient(140deg, var(--night), #10182b 72%, #141a2a); }
  .myth-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: clamp(2rem, 6vw, 7rem); align-items: center; }
  .myth-copy { padding-block: 1rem; }
  .myth-copy > p + p { margin-top: 1.25rem; }

  .rite { background-color: #10172a; }
  .rite-card { max-width: 720px; padding: clamp(1.5rem, 4vw, 3.5rem); border: 1px solid var(--gold); background: rgba(9,13,28,.65); box-shadow: 14px 14px 0 rgba(198,164,90,.08); }
  .rite-card p { font-family: var(--serif); font-size: clamp(1.35rem, 2.5vw, 2rem); line-height: 1.42; }
  .rite-card > strong { display: block; margin-top: 1.4rem; color: var(--gold-bright); font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; }

  .articles { background-color: #0b1020; }
  .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); list-style: none; }
  .article-grid li { min-height: 245px; padding: clamp(1.4rem, 3vw, 2.5rem); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }

  .symbols { background-color: var(--indigo); }
  .symbol-list { border-top: 1px solid var(--line); }
  .symbol-list div { display: grid; grid-template-columns: minmax(190px, .7fr) 1fr; gap: 1rem 2rem; padding: 1.3rem .4rem; border-bottom: 1px solid var(--line); }

  .traces { background: radial-gradient(circle at 10% 90%, rgba(52, 68, 111, .28), transparent 33rem), var(--night); }
  .ledger { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
  .ledger li { display: grid; grid-template-columns: 130px minmax(240px, 1fr) auto; gap: 1.2rem 2rem; align-items: center; padding: 1.5rem .5rem; border-bottom: 1px solid var(--line); }
  .ledger li > a, .record-state { justify-self: end; }
  .ledger-note { margin: 2rem 0 0 auto; padding-left: 1.2rem; border-left: 2px solid var(--gold); color: var(--muted); font-family: var(--serif); font-size: 1.12rem; }

  .participation { background-color: #121a30; }
  .gesture-list { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
  .gesture-list li { display: grid; grid-template-columns: 48px 1fr; gap: 1rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
  .no-proof { grid-column: 3; margin-top: 1.5rem; color: var(--muted); font-size: .92rem; }

  .limits { display: grid; grid-template-columns: .8fr 1.2fr; gap: 3rem 8vw; background-color: #0b0f1b; }
  .limits-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2.5rem; border-top: 1px solid var(--line); }
  .limits-grid p { padding: 1.5rem 0; border-bottom: 1px solid var(--line); color: var(--muted); }

  .exit { position: relative; overflow: hidden; min-height: max(720px, 100svh); display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 7rem var(--page-pad); text-align: center; background: radial-gradient(circle, #18223a 0 1px, transparent 2px) 50% 50% / 29px 29px, var(--night); }
  .exit::before, .exit::after { content: ""; position: absolute; width: min(70vw, 740px); aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; pointer-events: none; }
  .exit::after { width: min(48vw, 500px); }
  .exit > * { position: relative; z-index: 1; }
  .exit h2 { max-width: 12ch; color: var(--gold-bright); font-size: clamp(3.2rem, 8vw, 8rem); }
  .exit > p:not(.eyebrow) { margin-top: 2rem; color: var(--muted); font-family: var(--serif); font-size: 1.1rem; }
  .exit a { margin-top: 2.5rem; padding: .9rem 1.15rem; border: 1px solid var(--gold); color: var(--gold-bright); font-size: .7rem; font-weight: 700; letter-spacing: .14em; text-decoration: none; }

  .site-footer { position: relative; z-index: 2; display: flex; justify-content: space-between; gap: 2rem; padding: 2rem var(--page-pad); border-top: 1px solid var(--line); color: var(--muted); background: var(--night); font-size: .68rem; letter-spacing: .12em; }
}

@layer components {
  .skip-link { position: fixed; z-index: 100; top: -5rem; left: 1rem; padding: .75rem 1rem; color: var(--night); background: var(--gold-bright); font-weight: 700; }
  .skip-link:focus { top: 1rem; }

  .maker-mark { display: flex; align-items: center; gap: .8rem; font-size: .68rem; letter-spacing: .14em; text-decoration: none; white-space: nowrap; }
  .maker-mark span { display: grid; width: 42px; aspect-ratio: 1; place-items: center; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold-bright); }

  .plate-label, .eyebrow { color: var(--gold); font-size: .66rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
  .public-secret { position: relative; display: grid; grid-template-columns: 24px 1fr; gap: .75rem; margin-top: 2.2rem; padding-top: 1.1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
  .public-secret span { color: var(--gold-bright); }
  .folio { color: var(--gold); font-family: var(--serif); font-size: 3rem; line-height: 1; }
  .definition-copy { padding-left: 2rem; border-left: 1px solid var(--line); color: var(--muted); font-family: var(--serif); font-size: clamp(1.08rem, 1.7vw, 1.3rem); }
  .definition-copy p + p { margin-top: 1.1rem; }

  .myth-plate { padding: .75rem; border: 1px solid var(--line); background: #080c17; box-shadow: 18px 18px 0 rgba(198,164,90,.06); }
  .myth-plate img { width: 100%; height: auto; }
  .myth-plate figcaption { padding: .8rem .3rem .15rem; color: var(--muted); font-size: .62rem; letter-spacing: .16em; }
  .dropcap::first-letter { float: left; margin: .1em .16em 0 0; color: var(--gold-bright); font-family: var(--serif); font-size: 5.4rem; line-height: .7; }
  .myth-copy blockquote { margin: 2rem 0; padding: 1.6rem 1.8rem; border-block: 1px solid var(--gold); color: var(--gold-bright); font-family: var(--serif); font-size: clamp(1.3rem, 2.2vw, 2rem); line-height: 1.35; letter-spacing: .04em; text-align: center; }
  .margin-note { padding-left: 1rem; border-left: 1px solid var(--gold); color: var(--muted); font-size: .8rem; }
  .constellation { display: block; margin-bottom: 1.6rem; color: var(--gold); font-size: 1.25rem; letter-spacing: .35em; }

  .article-grid li > span { color: var(--gold); font-family: var(--serif); font-size: 2.2rem; }
  .article-grid h3 { margin-top: 1.5rem; color: var(--gold-bright); font-size: 1.5rem; }
  .article-grid p { margin-top: .55rem; color: var(--muted); font-size: .92rem; }

  .symbol-list dt { color: var(--gold-bright); font-size: .72rem; font-weight: 700; letter-spacing: .11em; }
  .symbol-list dt span { display: inline-block; width: 2rem; color: var(--gold); font-family: var(--serif); font-size: 1.35rem; }
  .symbol-list dd { color: var(--muted); }
  .ledger time { color: var(--gold); font: .68rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .08em; }
  .ledger strong { color: var(--ivory); font-family: var(--serif); font-size: 1.15rem; font-weight: 400; }
  .ledger p { margin-top: .25rem; color: var(--muted); font-size: .84rem; }
  .ledger a, .record-state { color: var(--gold-bright); font-size: .65rem; font-weight: 700; letter-spacing: .1em; }
  .gesture-list span { color: var(--gold); font: .68rem ui-monospace, monospace; }
  .gesture-list p { color: var(--muted); }
}

@layer responsive {
  @media (max-width: 980px) {
    .site-header nav { display: none; }
    .hero { grid-template-columns: 1fr; }
    .hero-image { min-height: min(70vh, 680px); background-image: linear-gradient(0deg, var(--indigo), transparent 35%), url("/assets/empty-chair-observatory.webp"); background-position: 48% center; }
    .hero-copy { margin-top: -4rem; padding: 0 var(--page-pad) 5rem; }
    .hero-copy::before { left: 38%; width: min(50vw, 430px); }
    .hero-caption { display: none; }
    .ruled-section { grid-template-columns: 55px 1fr; }
    .ruled-section > :nth-child(3) { grid-column: 2; }
    .myth-grid { grid-template-columns: 1fr; }
    .article-grid { grid-template-columns: repeat(2, 1fr); }
    .no-proof { grid-column: 2; }
    .limits { grid-template-columns: 1fr; }
  }

  @media (max-width: 650px) {
    body { font-size: 15px; }
    .site-header { min-height: 66px; }
    .maker-mark strong { font-size: .6rem; }
    .maker-mark span { width: 36px; }
    .hero { min-height: auto; }
    .hero-image { min-height: 55vh; }
    .hero-copy { margin-top: -2.25rem; padding-bottom: 4rem; }
    .hero h1 { font-size: clamp(3.1rem, 15vw, 5rem); }
    .russian-name { letter-spacing: .16em; }
    .ruled-section { grid-template-columns: 1fr; gap: 1.2rem; }
    .ruled-section > :nth-child(3), .no-proof { grid-column: 1; }
    .folio { font-size: 2rem; }
    .definition-copy { padding: 1.3rem 0 0; border-top: 1px solid var(--line); border-left: 0; }
    .section-heading { grid-template-columns: 1fr; }
    .section-heading h2, .section-heading > p:last-child:not(.eyebrow) { grid-column: 1; }
    .myth-plate { padding: .4rem; }
    .article-grid { grid-template-columns: 1fr; }
    .article-grid li { min-height: 0; }
    .symbol-list div { grid-template-columns: 1fr; }
    .ledger li { grid-template-columns: 1fr; gap: .35rem; padding-block: 1.25rem; }
    .ledger li > a, .record-state { justify-self: start; margin-top: .35rem; }
    .limits-grid { grid-template-columns: 1fr; }
    .exit { min-height: 630px; }
    .exit::before { width: 125vw; }
    .exit::after { width: 82vw; }
    .site-footer { flex-direction: column; }
  }

  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
  }
}

@layer components {
  .registry {
    padding: clamp(5rem, 10vw, 10rem) var(--page-pad);
    border-bottom: 1px solid var(--line);
    background: linear-gradient(145deg, #11192e, #090d1c 64%);
  }
  .registry-layout { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 4rem); }
  .registry-panel, .public-seats { padding: clamp(1.4rem, 3.3vw, 3rem); border: 1px solid var(--line); background: rgba(8, 12, 23, .72); }
  .registry-panel h3, .public-seats h3 { margin: .45rem 0 1.6rem; color: var(--gold-bright); font-size: clamp(1.7rem, 3vw, 2.5rem); }
  .registry-step { color: var(--gold); font: .68rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .14em; }
  .registry-fields { display: grid; gap: .7rem; }
  .registry-fields label { margin-top: .6rem; color: var(--ivory); font-size: .76rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
  .registry-fields label span { display: block; color: var(--muted); font-size: .68rem; font-weight: 400; letter-spacing: .03em; text-transform: none; }
  .registry-fields input, .registry-fields textarea, .registry-fields select {
    width: 100%; min-height: 48px; padding: .75rem .85rem; border: 1px solid rgba(198, 164, 90, .6); border-radius: 0;
    color: var(--ivory); background: #090e1e; font: inherit;
  }
  .registry-fields textarea { min-height: 112px; resize: vertical; }
  .registry-fields input::placeholder { color: #888477; }
  .registry-fields button, .registry button {
    min-height: 48px; padding: .8rem 1rem; border: 1px solid var(--gold); color: var(--gold-bright); background: transparent;
    font: 700 .7rem var(--sans); letter-spacing: .12em; cursor: pointer;
  }
  .registry-fields button { margin-top: 1rem; background: rgba(198, 164, 90, .09); }
  .registry button:hover:not(:disabled) { color: var(--night); background: var(--gold-bright); }
  .registry button:disabled { cursor: wait; opacity: .55; }
  .registry-fineprint { margin-top: 1.3rem; color: var(--muted); font-size: .78rem; }
  .registry-status { margin-top: 1rem; padding: .8rem 1rem; border-left: 2px solid var(--gold); color: var(--muted); background: rgba(198, 164, 90, .05); font-size: .82rem; }
  .registry-status[data-kind="error"] { border-color: #df8d76; color: #ffd3c7; }
  .registry-status[data-kind="success"] { border-color: #8fc3a8; color: #d9f3e5; }
  .receipt { margin-top: 1.4rem; padding: 1.2rem; border: 1px solid var(--gold-bright); background: #151d31; }
  .receipt[hidden] { display: none; }
  .receipt > p + dl, .receipt dl + p { margin-top: .8rem; }
  .receipt dl { display: grid; gap: .7rem; }
  .receipt dl div { min-width: 0; }
  .receipt dt { color: var(--muted); font-size: .7rem; text-transform: uppercase; }
  .receipt dd { overflow-wrap: anywhere; }
  .button-row { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1rem; }
  .button-row button { flex: 1 1 170px; }
  .public-seats { margin-top: clamp(1.5rem, 4vw, 4rem); }
  .public-seats > p:not(.registry-step):not(.registry-status) { color: var(--muted); }
  .seat-list { display: grid; gap: 1rem; margin: 1.5rem 0; padding: 0; list-style: none; }
  .seat-record { min-width: 0; padding: 1.25rem; border: 1px solid rgba(198, 164, 90, .35); background: #0d1325; }
  .seat-record-heading { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1rem; }
  .seat-record-heading strong { overflow-wrap: anywhere; font-family: var(--serif); font-size: 1.3rem; font-weight: 400; }
  .seat-status { color: #d9f3e5; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
  .seat-gesture { margin-top: .6rem; overflow-wrap: anywhere; color: var(--ivory); }
  .gesture-kind { color: var(--gold-bright); font-size: .72rem; font-weight: 700; letter-spacing: .08em; }
  .seat-meta { margin-top: .7rem; overflow-wrap: anywhere; color: var(--muted); font: .64rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .05em; }
  .seat-profile { display: inline-block; margin-top: .75rem; overflow-wrap: anywhere; color: var(--gold-bright); font-size: .68rem; font-weight: 700; letter-spacing: .08em; }
  .registry-doc-link { margin-top: 2rem; }
  .registry-doc-link a { color: var(--gold-bright); font-size: .72rem; font-weight: 700; letter-spacing: .1em; }

  .api-docs { max-width: 1120px; margin: 0 auto; padding: clamp(4rem, 8vw, 8rem) var(--page-pad); }
  .api-title { padding-bottom: clamp(4rem, 8vw, 7rem); border-bottom: 1px solid var(--line); }
  .api-title h1 { margin: 1rem 0 2rem; font-size: clamp(3.2rem, 8vw, 7rem); line-height: .86; letter-spacing: -.045em; }
  .api-title h1 em { color: var(--gold-bright); font-style: italic; }
  .api-title p:last-child { overflow-wrap: anywhere; color: var(--muted); }
  .api-section { padding: clamp(3rem, 7vw, 6rem) 0; border-bottom: 1px solid var(--line); }
  .api-section h2 { margin: .65rem 0 2rem; }
  .api-section h3 { margin: 2.5rem 0 1rem; color: var(--gold-bright); font-size: 1.6rem; }
  .api-section p + p, .api-section ol + p { margin-top: 1.2rem; }
  .api-section p, .api-section li { color: var(--muted); }
  .api-section ol { padding-left: 1.4rem; }
  .api-section li + li { margin-top: .8rem; }
  .api-section pre { margin: 1rem 0; padding: 1.2rem; overflow-x: auto; border: 1px solid var(--line); background: #080c17; }
  .api-section code { overflow-wrap: anywhere; }
}

@layer responsive {
  @media (max-width: 800px) {
    .registry-layout { grid-template-columns: 1fr; }
  }
  @media (max-width: 650px) {
    .registry { padding-inline: 1rem; }
    .registry-panel, .public-seats { padding: 1.1rem; }
    .seat-record-heading { display: grid; }
    .api-title h1 { font-size: clamp(2.65rem, 14vw, 4.3rem); }
  }
}