:root {
  --color-bg: #fbfbfb;
  --color-panel: #ffffff;
  --color-surface: #f5f6f6;
  --color-rail: #f2f3f3;
  --color-rail-edge: #e3e5e6;
  --color-hairline: #eceded;
  --color-ink: #16191c;
  --color-body: #4a5057;
  --color-muted: #5f666d;
  --color-accent: #2b3138;
  --color-on-accent: #ffffff;
  --color-focus-ring: #16191c;
  --color-amber-text: #956711;
  --color-amber-tint: #fdf3e2;
  --color-amber-rule: #a97d2f;
  --color-match: #e7e9ea;
  --color-control: #8c8e90;
  --color-brand: #1b2fc6;
  --blue: #1b2fc6;
  --blue-hover: #1626a6;
  --blue-ink: #1b2fc6;
  --blue-tint: #eef0fb;
  --blue-tint-edge: #d6dbf5;
  --blue-mark: #dde2fb;
  --band-bg: #1b2fc6;
  --band-ink: #ffffff;
  --band-body: #d9defa;
  --band-rule: rgba(255, 255, 255, 0.24);
  --button-bg: var(--blue);
  --button-ink: #ffffff;
  --header-bg: rgba(251, 251, 251, 0.92);
  --font-display: Martel, Georgia, "Times New Roman", serif;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111314;
    --color-panel: #191b1d;
    --color-surface: #1c1f21;
    --color-rail: #17191b;
    --color-rail-edge: #282b2e;
    --color-hairline: #232629;
    --color-ink: #e9ebed;
    --color-body: #c1c6cb;
    --color-muted: #8e9399;
    --color-accent: #e6e9ec;
    --color-on-accent: #14171a;
    --color-focus-ring: #e9ebed;
    --color-amber-text: #cfa050;
    --color-amber-tint: #2b2110;
    --color-amber-rule: #8f6e33;
    --color-match: #2a2f33;
    --color-control: #686b6e;
    --color-brand: #6f83ff;
    --blue: #2f43d6;
    --blue-hover: #3a4fe6;
    --blue-ink: #8c9bff;
    --blue-tint: #14172a;
    --blue-tint-edge: #262b4a;
    --blue-mark: #2a3168;
    --band-bg: #1a2370;
    --band-ink: #ffffff;
    --band-body: #cdd3f7;
    --band-rule: rgba(255, 255, 255, 0.18);
    --header-bg: rgba(17, 19, 20, 0.92);
  }
}

*, *::before, *::after { box-sizing: border-box; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-body);
  font-family: var(--font-ui);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

p { margin: 0 0 1em; max-width: 34rem; }
p:last-child { margin-bottom: 0; }
ol, ul { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }

h1, h2, h3 { margin: 0; color: var(--color-ink); }

.h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  text-wrap: balance;
  max-width: 18em;
}

.h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1.2;
  text-wrap: balance;
  margin-bottom: 24px;
}

.h3 {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.4;
  margin-bottom: 8px;
}

a { color: var(--color-ink); text-underline-offset: 3px; }
a:hover { color: var(--blue-ink); }

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
}
.skip:focus { top: 12px; }

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 32px;
}

.section { padding: 112px 0; }
.ruled { border-top: 1px solid var(--color-hairline); }

section[id] { scroll-margin-top: 96px; }

/* header */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-hairline);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-ink);
  text-decoration: none;
}
.wordmark:hover { color: var(--color-ink); }
.dot { color: var(--color-brand); }
.nav { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-ink);
  text-decoration: none;
}
.nav-link:hover { color: var(--blue-ink); text-decoration: underline; text-underline-offset: 3px; }

.button {
  display: inline-block;
  background: var(--button-bg);
  color: var(--button-ink);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.4;
  padding: 12px 22px;
  border-radius: 6px;
  text-decoration: none;
  white-space: nowrap;
}
.button:hover { background: var(--blue-hover); color: var(--button-ink); }
.button-band {
  background: #ffffff;
  color: var(--band-bg);
}
.button-band:hover { background: var(--blue-tint-edge); color: var(--band-bg); }

/* hero */
.hero { padding: 96px 0 64px; }
.lead {
  font-size: 1.25rem;
  line-height: 1.6;
  max-width: 40rem;
  margin: 28px 0 0;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 28px;
  margin-top: 36px;
}
.hero-note {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 16px 0 0;
}

.memo-zone {
  position: relative;
  isolation: isolate;
}
.memo-zone::before {
  content: "";
  position: absolute;
  z-index: -2;
  left: 0;
  right: 0;
  top: 62%;
  bottom: 0;
  background: var(--blue-tint);
  border-top: 1px solid var(--blue-tint-edge);
}

.memo { position: relative; }
.stack { position: relative; }
.stack::before,
.stack::after {
  content: "";
  position: absolute;
  z-index: -1;
  border: 1px solid var(--color-rail-edge);
  border-radius: 10px;
}
.stack::before {
  left: 12px; right: 12px; top: 8px; bottom: -8px;
  background: var(--color-panel);
}
.stack::after {
  left: 24px; right: 24px; top: 16px; bottom: -16px;
  background: var(--color-surface);
  z-index: -2;
}
.stack-one::after { content: none; }
.stack-one::before { left: 10px; right: 10px; border-radius: 4px; }

@media (prefers-reduced-motion: no-preference) {
  .memo {
    animation: rise 600ms ease-out 150ms both;
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: none; }
  }
}

.panel {
  position: relative;
  background: var(--color-panel);
  border: 1px solid var(--color-rail-edge);
  border-radius: 10px;
}
.memo-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--color-hairline);
}
.memo-question {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--color-ink);
  margin: 0;
  max-width: 40rem;
}
.tag {
  flex: none;
  font-weight: 500;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--color-muted);
  border: 1px solid var(--color-rail-edge);
  border-radius: 4px;
  padding: 2px 8px;
  white-space: nowrap;
}
.memo-body {
  display: grid;
  grid-template-columns: 62fr 38fr;
  font-size: 1rem;
}
.memo-answer { padding: 28px; min-width: 0; }
.memo-sources {
  padding: 28px;
  border-left: 1px solid var(--color-hairline);
  min-width: 0;
}
.label {
  display: block;
  font-weight: 600;
  font-size: 0.75rem;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  margin-bottom: 10px;
}
.memo p { max-width: none; }
.answer-lead { color: var(--color-ink); font-size: 1.0625rem; }
.meta { color: var(--color-muted); font-size: 0.875rem; margin-bottom: 4px; }
.checks { font-size: 0.875rem; color: var(--color-body); }
.memo-rule {
  border: 0;
  border-top: 1px solid var(--color-hairline);
  margin: 24px 0;
}
.chip {
  display: inline-block;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: 4px;
  font-weight: 500;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-ink);
  padding: 1px 6px;
  white-space: nowrap;
}
.chip-n { color: var(--blue-ink); margin-left: 3px; }
.flag {
  display: inline-block;
  background: var(--color-amber-tint);
  color: var(--color-amber-text);
  border-left: 2px solid var(--color-amber-rule);
  border-radius: 0 6px 6px 0;
  font-weight: 500;
  font-size: 0.875rem;
  line-height: 1.5;
  padding: 4px 10px;
}
.flag-block { display: block; }

.src-label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-ink);
  margin: 0 0 10px;
}
.src-list { font-size: 0.875rem; line-height: 1.5; }
.src-list li { margin-bottom: 10px; color: var(--color-ink); overflow-wrap: anywhere; }
.src-detail { display: block; color: var(--color-muted); }
.src-more { font-size: 0.875rem; color: var(--color-muted); margin: 0 0 24px; }
.src-gap { margin-top: 20px; }

.caption {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 40px 0 0;
}
.caption-flush { margin-top: 20px; }

/* band section 3 */
.band-rail {
  background: var(--blue-tint);
  border-bottom: 1px solid var(--blue-tint-edge);
  padding: 56px 0 72px;
}
.cols-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.col {
  border-top: 2px solid var(--blue-ink);
  padding-top: 20px;
}
.col p { max-width: 22rem; font-size: 1rem; }
.cols-hair .col { border-top: 1px solid var(--color-hairline); }

/* two-column sections */
.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
  align-items: start;
}
.split-rev { grid-template-columns: 7fr 5fr; }
.split-rev > .split-text { grid-column: 2; grid-row: 1; }
.split-rev > .split-visual { grid-column: 1; grid-row: 1; }
.split-text, .split-visual { min-width: 0; }
.split-text p + p { margin-top: 0; }

/* reader */
.reader { padding: 28px; }
.reader-head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-hairline);
  margin-bottom: 20px;
}
.reader-title { font-weight: 600; font-size: 0.9375rem; color: var(--color-ink); margin: 0; }
.reader-sub { font-size: 0.8125rem; color: var(--color-muted); margin: 0; }
.passage {
  border-left: 3px solid var(--blue-ink);
  padding-left: 20px;
  margin-bottom: 24px;
}
.passage-label { display: block; font-size: 0.8125rem; color: var(--color-muted); margin-bottom: 6px; }
.passage-text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-ink);
  max-width: none;
}
.passage-text mark {
  background: var(--blue-mark);
  color: var(--color-ink);
  padding: 2px 0;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
.status { display: grid; gap: 12px; font-size: 0.875rem; }
.status-row {
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: 6px;
  padding: 8px 12px;
  color: var(--color-ink);
  margin: 0;
  max-width: none;
}
.flag-row { display: block; margin: 0; max-width: none; }

/* draft page */
.doc {
  background: var(--color-panel);
  border: 1px solid var(--color-rail-edge);
  border-radius: 4px;
  padding: 44px 48px 0;
  font-family: "Times New Roman", Times, Georgia, serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  position: relative;
}
.doc p { max-width: none; margin: 0 0 8px; }
.doc-c { text-align: center; }
.doc-b { font-weight: 700; }
.doc-parties { display: flex; justify-content: space-between; gap: 16px; margin: 0 0 8px; }
.doc-title { margin: 12px 0; }
.doc-para { margin-top: 8px; }
.field {
  background: var(--color-amber-tint);
  color: var(--color-amber-text);
  border-radius: 3px;
  padding: 0 2px;
}
.doc-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 28px 0 0;
  padding: 14px 0;
  border-top: 1px solid var(--color-hairline);
  font-family: var(--font-ui);
  font-size: 0.8125rem;
  color: var(--color-muted);
}
.pill {
  flex: none;
  background: var(--color-surface);
  border: 1px solid var(--color-hairline);
  border-radius: 999px;
  padding: 2px 10px;
  color: var(--color-ink);
}

/* how */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  border-top: 1px solid var(--color-rail-edge);
  margin-top: 48px;
  padding-top: 28px;
}
.step { min-width: 0; }
.step-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--blue-ink);
  margin-bottom: 20px;
}
.step p { font-size: 1rem; }

/* limits */
.limits {
  background: var(--band-bg);
  color: var(--band-body);
  padding: 112px 0;
}
.limits .h2 { color: var(--band-ink); }
.limits-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 64px;
  align-items: start;
}
.limits-grid > div { min-width: 0; }
.statement {
  border-top: 1px solid var(--band-rule);
  padding: 20px 0 0;
  margin-bottom: 20px;
}
.statement p { color: var(--band-body); max-width: 34rem; }
.statement strong { color: var(--band-ink); font-weight: 600; }
.access {
  border: 1px solid var(--band-rule);
  border-radius: 10px;
  padding: 32px;
}
.access-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--band-ink);
  margin: 0 0 12px;
}
.access p { color: var(--band-body); }
.access .button { margin-top: 12px; }
.access-small { font-size: 0.9375rem; margin-top: 20px; overflow-wrap: anywhere; }
.access-small a { color: var(--band-ink); }

/* footer */
.footer { padding: 40px 0 56px; }
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.footer-text { font-size: 0.8125rem; color: var(--color-muted); text-align: right; }
.footer-text p { max-width: 36rem; margin: 0 0 4px; }

/* 404 */
.notfound { padding: 96px 0; }

@media (max-width: 900px) {
  .split, .split-rev { grid-template-columns: 1fr; gap: 40px; }
  .split-rev > .split-text, .split-rev > .split-visual { grid-column: 1; grid-row: auto; }
  .memo-body { grid-template-columns: 1fr; }
  .memo-sources { border-left: 0; border-top: 1px solid var(--color-hairline); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .limits-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 760px) {
  .section { padding: 72px 0; }
  .limits { padding: 72px 0; }
  .nav-links { display: none; }
  .cols-3 { grid-template-columns: 1fr; gap: 28px; }
  .band-rail { padding: 40px 0 56px; }
  .footer-row { flex-direction: column; }
  .footer-text { text-align: left; }
  .memo-zone::before { top: 70%; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .hero { padding: 56px 0 48px; }
  .memo-top { flex-direction: column; gap: 12px; padding: 18px 20px; }
  .memo-answer, .memo-sources, .reader { padding: 20px; }
  .doc { padding: 28px 24px 0; }
  .access { padding: 24px; }
  .stack::before { left: 8px; right: 8px; }
  .stack::after { left: 16px; right: 16px; }
}

@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; }
  .doc-foot { flex-wrap: wrap; }
}