/* ============================================================
   外国人ドライバー紹介サービス 比較ドキュメント
   - Neutral base with warm hospitality accent
   - Maximum readability for Japanese long-form
   ============================================================ */

:root {
  /* base */
  --bg: oklch(0.985 0.005 80);
  --paper: oklch(0.995 0.003 80);
  --ink: oklch(0.22 0.012 60);
  --ink-2: oklch(0.38 0.012 60);
  --muted: oklch(0.55 0.012 60);
  --line: oklch(0.91 0.008 70);
  --line-2: oklch(0.95 0.006 70);
  --warn-bg: oklch(0.97 0.015 80);
  --warn-line: oklch(0.86 0.04 70);

  /* accent (default = amber) */
  --acc: oklch(0.64 0.135 55);
  --acc-soft: oklch(0.96 0.03 65);
  --acc-ink: oklch(0.36 0.10 50);

  /* company tags */
  --co-a: oklch(0.64 0.135 55);     /* amber */
  --co-a-soft: oklch(0.96 0.028 65);
  --co-b: oklch(0.50 0.055 230);    /* slate blue */
  --co-b-soft: oklch(0.95 0.015 230);

  /* gap (no-info) */
  --gap-ink: oklch(0.50 0.012 60);
  --gap-bg: oklch(0.93 0.007 70);

  /* typography */
  --ff-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Yu Gothic UI", Meiryo, sans-serif;
  --ff-display: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --ff-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", ui-monospace, monospace;

  /* metrics */
  --maxw: 1180px;
  --readw: 760px;
  --pad: 28px;
  --r: 10px;
  --r-lg: 14px;

  /* density */
  --gap-1: 8px;
  --gap-2: 16px;
  --gap-3: 24px;
  --gap-4: 40px;
  --gap-5: 64px;
}

[data-accent="amber"]  { --acc: oklch(0.64 0.135 55);  --acc-soft: oklch(0.96 0.030 65);  --acc-ink: oklch(0.36 0.10 50); }
[data-accent="clay"]   { --acc: oklch(0.58 0.115 30);  --acc-soft: oklch(0.95 0.025 30);  --acc-ink: oklch(0.34 0.09 28); }
[data-accent="forest"] { --acc: oklch(0.50 0.08 160);  --acc-soft: oklch(0.95 0.020 160); --acc-ink: oklch(0.30 0.06 160);}
[data-accent="ink"]    { --acc: oklch(0.30 0.020 60);  --acc-soft: oklch(0.93 0.006 70);  --acc-ink: oklch(0.22 0.012 60); }

[data-density="compact"] {
  --pad: 20px;
  --gap-2: 12px;
  --gap-3: 18px;
  --gap-4: 28px;
  --gap-5: 44px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ff-sans);
  font-weight: 400;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.85;
  letter-spacing: 0.01em;
}

a { color: inherit; text-decoration-color: color-mix(in oklab, var(--acc) 50%, transparent); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--acc); }

/* --- progress bar --- */
.progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: transparent; z-index: 100; }
.progress__bar { height: 100%; width: 0%; background: var(--acc); transition: width 60ms linear; }

/* --- topbar --- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: saturate(120%) blur(10px);
  -webkit-backdrop-filter: saturate(120%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 14px var(--pad);
  display: flex; align-items: center; gap: var(--gap-3); justify-content: space-between;
}
.topbar__brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  width: 22px; height: 22px; border-radius: 6px;
  background: var(--ink);
  position: relative;
  flex: 0 0 auto;
}
.brand__mark::after {
  content: ""; position: absolute; inset: 5px;
  background: var(--acc); border-radius: 2px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand__eyebrow {
  font-family: var(--ff-mono);
  font-size: 10px; letter-spacing: 0.18em; color: var(--muted);
  text-transform: uppercase;
}
.brand__title { font-weight: 500; font-size: 14px; }
.topbar__nav { display: flex; align-items: center; gap: 10px; }

/* segmented control */
.seg {
  display: inline-flex; padding: 3px; border-radius: 999px;
  background: var(--line-2); border: 1px solid var(--line);
}
.seg__btn {
  font: inherit; font-size: 12.5px; font-weight: 500;
  padding: 6px 14px; border-radius: 999px;
  background: transparent; border: 0; color: var(--ink-2);
  cursor: pointer; transition: all 0.15s ease;
  white-space: nowrap;
}
.seg__btn:hover { color: var(--ink); }
.seg__btn[aria-pressed="true"] {
  background: var(--paper); color: var(--ink);
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 0 0 1px var(--line);
}
.seg--inline { background: transparent; border: 1px solid var(--line); }

.iconbtn {
  width: 32px; height: 32px; border-radius: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--line); color: var(--ink-2);
  cursor: pointer; transition: all 0.15s ease;
}
.iconbtn:hover { background: var(--paper); color: var(--ink); }

/* --- hero --- */
.hero { border-bottom: 1px solid var(--line); }
.hero__inner {
  max-width: var(--maxw); margin: 0 auto;
  padding: 72px var(--pad) 56px;
}
.hero__meta { display: flex; gap: 8px; margin-bottom: 28px; }
.chip {
  font-family: var(--ff-mono);
  font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px;
  background: var(--acc-soft); color: var(--acc-ink);
  border: 1px solid color-mix(in oklab, var(--acc) 25%, transparent);
}
.chip--ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.hero__title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(34px, 5.2vw, 60px);
  line-height: 1.28;
  letter-spacing: -0.015em;
  margin: 0 0 28px;
  max-width: 900px;
  text-wrap: balance;
}
.hero__title--accent {
  color: var(--acc-ink);
  position: relative;
}
.hero__title--accent::before {
  content: ""; position: absolute; left: -16px; top: 50%;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--acc); transform: translateY(-50%);
}
.hero__lede {
  max-width: var(--readw); font-size: 16.5px; color: var(--ink-2);
  margin: 0 0 40px;
}
.inline-tag {
  font-family: var(--ff-mono);
  font-size: 11.5px; letter-spacing: 0.05em;
  padding: 2px 8px; border-radius: 4px;
  background: var(--gap-bg); color: var(--gap-ink);
  white-space: nowrap;
  margin: 0 2px;
}
.hero__facts {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin: 0; padding: 0;
  border-top: 1px solid var(--line);
}
.hero__facts > div {
  padding: 18px 20px 18px 0;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 4px;
}
.hero__facts > div:last-child { border-right: 0; }
.hero__facts > div:not(:first-child) { padding-left: 20px; }
.hero__facts dt {
  font-family: var(--ff-mono);
  font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted);
}
.hero__facts dd { margin: 0; font-size: 14px; color: var(--ink); font-weight: 500; line-height: 1.5; }

@media (max-width: 760px) {
  .hero__facts { grid-template-columns: 1fr 1fr; }
  .hero__facts > div:nth-child(2) { border-right: 0; }
  .hero__facts > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

/* --- layout: sidebar + main --- */
.layout {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 220px 1fr;
  gap: var(--gap-5);
  padding: var(--gap-5) var(--pad);
  align-items: start;
}
@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; gap: var(--gap-3); }
  .toc { display: none; }
}

.toc { position: relative; }
.toc__sticky { position: sticky; top: 80px; }
.toc__label {
  font-family: var(--ff-mono);
  font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 12px;
}
.toc__list { list-style: none; margin: 0 0 32px; padding: 0; }
.toc__list li { margin: 0; }
.toc__link {
  display: block; padding: 7px 0;
  font-family: var(--ff-mono);
  font-size: 12px; letter-spacing: 0.03em;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 12px;
  margin-left: -14px;
  transition: all 0.15s ease;
}
.toc__link:hover { color: var(--ink); }
.toc__link[data-active] {
  color: var(--ink); border-left-color: var(--acc); font-weight: 500;
}
.toc__legend { padding-top: 20px; border-top: 1px solid var(--line); }
.legend { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-2); margin: 6px 0; }
.legend__dot { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; }
.legend__dot--a { background: var(--co-a); }
.legend__dot--b { background: var(--co-b); }
.legend__dot--gap { background: var(--gap-bg); border: 1px solid var(--gap-ink); }

/* --- main blocks --- */
.main { min-width: 0; }
.block { padding-bottom: var(--gap-5); margin-bottom: var(--gap-5); border-bottom: 1px solid var(--line); }
.block:last-of-type { border-bottom: 0; }

.block__head {
  display: grid; grid-template-columns: auto 1fr; column-gap: 16px; row-gap: 4px;
  margin-bottom: var(--gap-3); align-items: baseline;
}
.block__num {
  font-family: var(--ff-mono); font-size: 12px; color: var(--muted);
  letter-spacing: 0.1em;
  grid-row: span 2;
  align-self: start;
  padding-top: 12px;
}
.block__title {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.015em;
  line-height: 1.3;
}
.block__sub { margin: 0; color: var(--muted); font-size: 14.5px; max-width: var(--readw); }

/* --- premise --- */
.premise {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 8px 24px;
}
.premise__list { list-style: none; margin: 0; padding: 0; }
.premise__list li {
  display: grid; grid-template-columns: 140px 1fr; gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-2);
  align-items: baseline;
}
.premise__list li:last-child { border-bottom: 0; }
.premise__k {
  font-family: var(--ff-mono); font-size: 11.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted);
}
.premise__v { font-size: 15px; color: var(--ink); }

/* --- cohead (company headers above timeline) --- */
.cohead {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-2);
  margin-bottom: var(--gap-3);
  position: sticky; top: 60px; z-index: 5;
  padding-top: 8px;
  background: linear-gradient(to bottom, var(--bg) 80%, transparent);
}
.cohead__col {
  display: flex; gap: 12px; align-items: center;
  padding: 14px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
  border-top-width: 3px;
}
.cohead__col--a { border-top-color: var(--co-a); }
.cohead__col--b { border-top-color: var(--co-b); }
.cohead__tag {
  width: 28px; height: 28px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--ff-mono); font-weight: 500; font-size: 12px;
  color: var(--paper);
  flex: 0 0 auto;
}
.cohead__col--a .cohead__tag { background: var(--co-a); }
.cohead__col--b .cohead__tag { background: var(--co-b); }
.cohead__name { margin: 0; font-size: 15px; font-weight: 500; line-height: 1.3; }
.cohead__brand { margin: 2px 0 0; font-family: var(--ff-mono); font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }

/* --- timeline --- */
.timeline { list-style: none; margin: 0; padding: 0; }
.phase {
  display: grid;
  grid-template-columns: 92px 1fr;
  column-gap: 24px;
  padding: 0 0 var(--gap-3);
  position: relative;
}
.phase__rail {
  position: relative;
  display: flex; flex-direction: column; align-items: flex-start;
  padding-top: 4px;
}
.phase__rail::before {
  content: "";
  position: absolute;
  left: 6px; top: 22px; bottom: -24px;
  width: 1px;
  background: var(--line);
}
.phase:last-child .phase__rail::before { display: none; }
.phase__node {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--acc);
  margin-left: 0;
  z-index: 1;
}
.phase__node--gap { border-style: dashed; border-color: var(--muted); background: var(--bg); }
.phase__when {
  margin-top: 8px;
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.08em; color: var(--muted);
  text-transform: uppercase;
}
.phase__title {
  grid-column: 2;
  margin-bottom: 14px;
}
.phase__title h3 {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
  line-height: 1.4;
}
.phase__sub { margin: 2px 0 0; color: var(--muted); font-size: 13.5px; }

.phase__cards {
  grid-column: 2;
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-2);
}

/* view modes */
body[data-view="A"] .cohead__col--b,
body[data-view="A"] .card--b { display: none; }
body[data-view="A"] .cohead { grid-template-columns: 1fr; }
body[data-view="A"] .phase__cards { grid-template-columns: 1fr; max-width: var(--readw); }

body[data-view="B"] .cohead__col--a,
body[data-view="B"] .card--a { display: none; }
body[data-view="B"] .cohead { grid-template-columns: 1fr; }
body[data-view="B"] .phase__cards { grid-template-columns: 1fr; max-width: var(--readw); }

@media (max-width: 760px) {
  .cohead { grid-template-columns: 1fr; }
  .phase__cards { grid-template-columns: 1fr !important; }
  .phase { grid-template-columns: 64px 1fr; column-gap: 14px; }
}

/* --- card --- */
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 20px 22px;
  position: relative;
  font-size: 14.5px;
  line-height: 1.85;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; bottom: 0;
  width: 3px; border-radius: var(--r) 0 0 var(--r);
}
.card--a::before { background: var(--co-a); }
.card--b::before { background: var(--co-b); }
.card__body { margin: 0; color: var(--ink); }
.card > * + * { margin-top: 12px; }
.card > .kv + *, .card > * + .kv { margin-top: 14px; }
.card__lead { margin: 0 0 12px; color: var(--ink); }
.card__warn {
  margin: 0 0 12px;
  display: inline-block;
  padding: 4px 10px; border-radius: 4px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  color: var(--acc-ink);
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.03em;
}
.card__row { margin: 0; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.card__k {
  font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--muted); flex: 0 0 auto;
}
.card__v { color: var(--ink); }

.kv { list-style: none; margin: 0; padding: 0; }
.kv li {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  align-items: baseline;
}
.kv li:last-child { border-bottom: 0; }
.kv li:first-child { padding-top: 0; }
.kv li > span {
  font-family: var(--ff-mono);
  font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
}
.kv li > b { font-weight: 500; color: var(--ink); font-size: 14px; line-height: 1.7; }
.kv li > b.muted { font-weight: 400; color: var(--muted); }

.gap {
  margin: 0; display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}
.gap__pill {
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.05em;
  padding: 2px 8px; border-radius: 4px;
  background: var(--gap-bg); color: var(--gap-ink);
  white-space: nowrap;
}
.gap__inline {
  font-family: var(--ff-mono);
  font-size: 11.5px; letter-spacing: 0.04em;
  padding: 2px 6px; border-radius: 3px;
  background: var(--gap-bg); color: var(--gap-ink);
  white-space: nowrap; font-weight: 400 !important;
}

.muted { color: var(--muted) !important; }

.card--gap { background: var(--bg); border-style: dashed; }
.gaplist { margin: 0; padding-left: 18px; color: var(--muted); }
.gaplist li {
  padding: 4px 0;
  font-size: 13.5px;
}
.gaplist li::marker { color: color-mix(in oklab, var(--muted) 60%, transparent); }

/* --- table card --- */
.tablecard {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  margin-bottom: var(--gap-3);
  overflow: hidden;
}
.tablecard__head {
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  background: var(--line-2);
}
.tablecard__head h3 {
  margin: 0;
  font-size: 14px; font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.005em;
}
.tableScroll { overflow-x: auto; }
.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.tbl th, .tbl td {
  padding: 14px 24px;
  text-align: left;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
  line-height: 1.7;
}
.tbl tbody tr:last-child td { border-bottom: 0; }
.tbl th {
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.tbl td.num, .tbl th.num {
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.tbl__sum td { background: color-mix(in oklab, var(--acc-soft) 50%, transparent); }
.tbl__sum td b { color: var(--acc-ink); }

.bullets {
  margin: 0; padding: 18px 24px 18px 44px;
  font-size: 14.5px; line-height: 1.9; color: var(--ink-2);
}
.bullets li { margin: 4px 0; }
.bullets li::marker { color: var(--acc); }

.callout {
  margin: 0;
  padding: 14px 24px;
  border-top: 1px solid var(--line-2);
  background: var(--acc-soft);
  color: var(--acc-ink);
  font-size: 13.5px;
  font-weight: 500;
}

/* --- cost summary cards --- */
.costSummary {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap-2);
  margin-bottom: var(--gap-3);
}
@media (max-width: 760px) { .costSummary { grid-template-columns: 1fr 1fr; } }

.costSummary__item {
  padding: 22px 22px 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  display: flex; flex-direction: column; gap: 8px;
  min-height: 140px;
}
.costSummary__item--accent {
  background: var(--acc-soft);
  border-color: color-mix(in oklab, var(--acc) 25%, transparent);
}
.costSummary__k {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted);
}
.costSummary__item--accent .costSummary__k { color: var(--acc-ink); }
.costSummary__v {
  margin: auto 0 0;
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: 18px;
  line-height: 1;
  color: var(--ink);
  display: flex; align-items: baseline; gap: 4px;
  flex-wrap: wrap;
}
.costSummary__v .num {
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  font-size: 38px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.costSummary__item--accent .num { color: var(--acc-ink); }
.costSummary__v .unit { font-size: 12px; color: var(--muted); margin-left: 4px; font-family: var(--ff-sans); letter-spacing: 0.05em; }

.punch {
  font-family: var(--ff-display);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.85;
  letter-spacing: -0.005em;
  color: var(--ink);
  padding: 22px 28px;
  margin: 0 0 var(--gap-3);
  border-left: 3px solid var(--acc);
  background: var(--acc-soft);
  border-radius: 0 var(--r) var(--r) 0;
}
.punch b { font-weight: 700; color: var(--acc-ink); }

.grid2 {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-2);
  margin-bottom: var(--gap-3);
}
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }

/* --- risks --- */
.risks {
  margin: var(--gap-3) 0;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.risks__title {
  margin: 0 0 20px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.005em;
}
.risks__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap-2);
}
.risks__list li {
  display: flex; gap: 16px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.risks__num {
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.1em;
  color: var(--acc);
  padding-top: 4px;
}
.risks__h { margin: 0 0 4px; font-weight: 500; font-size: 14.5px; color: var(--ink); }
.risks__b { margin: 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.75; }
@media (max-width: 760px) { .risks__list { grid-template-columns: 1fr; } }

.footnote {
  font-size: 12.5px; color: var(--muted); line-height: 1.85;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  border-radius: var(--r);
  background: var(--bg);
}
.footnote b { color: var(--ink-2); font-weight: 500; letter-spacing: 0.05em; }

/* --- conclusion --- */
.conclusion {
  max-width: var(--readw);
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink);
}
.conclusion p { margin: 0 0 18px; }
.conclusion b { font-weight: 700; color: var(--acc-ink); border-bottom: 2px solid color-mix(in oklab, var(--acc) 30%, transparent); padding-bottom: 1px; }
.conclusion__sub { font-size: 14.5px !important; color: var(--ink-2); margin-top: 28px !important; padding-top: 20px; border-top: 1px solid var(--line); }
.conclusion__sub b { font-weight: 500; color: var(--ink-2); border-bottom: 0; }

/* --- refs --- */
.refs {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap-3);
  margin-bottom: var(--gap-3);
}
@media (max-width: 760px) { .refs { grid-template-columns: 1fr; } }
.refs__group {}
.refs__h {
  margin: 0 0 12px;
  font-family: var(--ff-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); font-weight: 500;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.refs__group ul { list-style: none; margin: 0; padding: 0; }
.refs__group li { padding: 6px 0; font-size: 13.5px; line-height: 1.55; }
.refs__group a {
  text-decoration: none;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
  transition: all 0.15s ease;
}
.refs__group a:hover { color: var(--acc-ink); border-bottom-color: var(--acc); }
.refs__foot { font-size: 12.5px; color: var(--muted); padding-top: 20px; border-top: 1px solid var(--line); }

.foot {
  display: flex; justify-content: space-between;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
  padding-top: var(--gap-3);
}

/* --- tweaks panel --- */
.tweaks {
  position: fixed; right: 20px; top: 70px; z-index: 60;
  width: 260px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  padding: 0;
  overflow: hidden;
}
.tweaks[hidden] { display: none; }
.tweaks__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}
.tweaks__head p {
  margin: 0;
  font-family: var(--ff-mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
.tweaks__sec { padding: 14px 16px; border-bottom: 1px solid var(--line-2); }
.tweaks__sec:last-child { border-bottom: 0; }
.tweaks__label {
  margin: 0 0 10px;
  font-family: var(--ff-mono); font-size: 10.5px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted);
}
.swatches { display: flex; gap: 8px; }
.sw {
  width: 28px; height: 28px; border-radius: 50%;
  cursor: pointer; border: 2px solid transparent;
  outline: 1px solid var(--line); outline-offset: 1px;
  transition: all 0.15s ease;
}
.sw:hover { transform: scale(1.06); }
.sw[aria-pressed="true"] {
  border-color: var(--paper);
  outline-color: var(--ink);
}
.sw--amber  { background: oklch(0.64 0.135 55); }
.sw--clay   { background: oklch(0.58 0.115 30); }
.sw--forest { background: oklch(0.50 0.08 160); }
.sw--ink    { background: oklch(0.30 0.020 60); }

/* selection */
::selection { background: color-mix(in oklab, var(--acc) 30%, transparent); }

/* focus */
:focus-visible {
  outline: 2px solid var(--acc); outline-offset: 2px; border-radius: 4px;
}

/* print */
@media print {
  .topbar, .toc, .progress, .tweaks { display: none; }
  .layout { grid-template-columns: 1fr; padding: 0; }
  body { background: white; }
}