/* ==========================================================================
   ÉDUCATION FINANCIÈRE — MANUEL TECHNIQUE 2026
   Nothing Design System · instrument-panel documentation
   ========================================================================== */

:root {
  --black: #000000;
  --surface: #111111;
  --surface-raised: #1a1a1a;
  --border: #222222;
  --border-visible: #333333;
  --text-disabled: #666666;
  --text-secondary: #999999;
  --text-primary: #e8e8e8;
  --text-display: #ffffff;
  --interactive: #5b9bf6;
  --accent: #d71921;
  --accent-subtle: rgba(215, 25, 33, 0.15);
  --success: #4a9e5c;
  --warning: #d4a843;

  --f-dot: "Doto", "Space Mono", monospace;
  --f-sans: "Space Grotesk", "DM Sans", system-ui, sans-serif;
  --f-mono: "Space Mono", "JetBrains Mono", "SF Mono", monospace;

  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --top: 56px;
  --side: 288px;
  --toc: 232px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --black: #f5f5f5;
  --surface: #ffffff;
  --surface-raised: #f0f0f0;
  --border: #e8e8e8;
  --border-visible: #cccccc;
  --text-disabled: #999999;
  --text-secondary: #666666;
  --text-primary: #1a1a1a;
  --text-display: #000000;
  --interactive: #007aff;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--top) + 24px); }
body {
  margin: 0;
  background: var(--black);
  color: var(--text-primary);
  font: 400 16px/1.65 var(--f-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--text-display); color: var(--black); }
a { color: var(--interactive); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
input, select { font: inherit; color: inherit; }
strong, b { color: var(--text-display); font-weight: 500; }
em { font-style: normal; color: var(--text-display); }
sup, sub { font-size: 0.72em; line-height: 0; }

.mono { font-family: var(--f-mono); }
.label {
  font: 400 11px/1.2 var(--f-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.dot-grid {
  background-image: radial-gradient(circle, var(--border-visible) 1px, transparent 1px);
  background-size: 16px 16px;
}

/* ---------- TOP BAR ---------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; height: var(--top); z-index: 50;
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px 0 20px;
  background: var(--black);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--text-display); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 28px; height: 28px; flex: none; }
.brand-name { font: 500 15px/1 var(--f-sans); letter-spacing: -0.01em; white-space: nowrap; }
.brand-ed { white-space: nowrap; font: 400 10px/1 var(--f-mono); letter-spacing: 0.1em; color: var(--text-secondary); text-transform: uppercase; }
.brand-txt { display: flex; flex-direction: column; gap: 4px; }
.top-spacer { flex: 1; }
.search-btn {
  display: flex; align-items: center; gap: 10px;
  height: 36px; min-width: 260px; padding: 0 10px 0 12px;
  border: 1px solid var(--border-visible); border-radius: 999px;
  color: var(--text-secondary);
  font: 400 11px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.search-btn:hover { border-color: var(--text-secondary); color: var(--text-primary); }
.search-btn svg { width: 16px; height: 16px; }
.search-btn kbd { margin-left: auto; }
kbd {
  font: 400 10px/1 var(--f-mono); letter-spacing: 0.04em;
  padding: 4px 6px; border: 1px solid var(--border-visible); border-radius: 4px; color: var(--text-secondary);
}
.icon-btn {
  width: 36px; height: 36px; display: grid; place-items: center;
  border: 1px solid var(--border-visible); border-radius: 999px; color: var(--text-secondary);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.icon-btn:hover { color: var(--text-display); border-color: var(--text-secondary); }
.icon-btn svg { width: 16px; height: 16px; }
.menu-btn { display: none; }
.top-progress { display: flex; align-items: center; gap: 10px; }
.top-progress .label { white-space: nowrap; }

/* ---------- SEGMENTED BAR (signature component) ---------- */
.seg { display: flex; gap: 2px; height: 8px; }
.seg i { flex: 1; background: var(--border-visible); display: block; }
.seg i.on { background: var(--text-display); }
.seg i.red { background: var(--accent); }
.seg.sm { height: 6px; width: 120px; }
.seg.lg { height: 14px; }

/* ---------- LAYOUT ---------- */
.shell { display: grid; grid-template-columns: var(--side) minmax(0, 1fr); padding-top: var(--top); min-height: 100vh; }
.sidebar {
  position: sticky; top: var(--top); height: calc(100vh - var(--top));
  overflow-y: auto; overscroll-behavior: contain;
  border-right: 1px solid var(--border);
  padding: 20px 0 48px;
  scrollbar-width: thin; scrollbar-color: var(--border-visible) transparent;
}
.nav-part { padding: 0 12px; margin-bottom: 20px; }
.nav-part-h {
  display: flex; align-items: baseline; gap: 10px;
  padding: 6px 10px 8px;
  font: 400 11px/1.2 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-disabled);
}
.nav-part-h .n { color: var(--text-secondary); }
.nav-part-h .lvl { margin-left: auto; font-size: 10px; }
.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border-radius: 6px;
  color: var(--text-secondary); font-size: 14px; line-height: 1.35;
  transition: color .15s var(--ease), background .15s var(--ease);
}
.nav-link:hover { color: var(--text-display); text-decoration: none; background: var(--surface); }
.nav-link .code { font: 400 10px/1 var(--f-mono); letter-spacing: 0.06em; color: var(--text-disabled); width: 30px; flex: none; }
.nav-link .t { flex: 1; min-width: 0; }
.nav-link .chk { width: 8px; height: 8px; border: 1px solid var(--border-visible); border-radius: 50%; flex: none; }
.nav-link.done .chk { background: var(--text-secondary); border-color: var(--text-secondary); }
.nav-link.active { color: var(--text-display); background: var(--surface-raised); }
.nav-link.active .code { color: var(--text-display); }
.nav-link.active .chk { border-color: var(--text-display); }
.nav-link.active::before { content: ""; width: 2px; height: 16px; background: var(--accent); margin-left: -10px; margin-right: -2px; }
.scrim { display: none; }
.sidebar-foot { padding: 16px 22px 0; border-top: 1px solid var(--border); margin: 8px 12px 0; }
.sidebar-foot p { margin: 0 0 12px; font-size: 12px; color: var(--text-disabled); line-height: 1.5; }

.main { min-width: 0; display: grid; grid-template-columns: minmax(0, 1fr) var(--toc); }
.content { min-width: 0; overflow-x: clip; padding: 56px clamp(20px, 5vw, 72px) 96px; }
.page { max-width: 780px; margin: 0 auto; }
.page.wide { max-width: 1040px; }
.toc {
  position: sticky; top: var(--top); height: calc(100vh - var(--top)); overflow-y: auto;
  padding: 56px 20px 40px 0;
}
.toc-h { margin-bottom: 14px; }
.toc a {
  display: block; padding: 5px 0 5px 12px; border-left: 1px solid var(--border);
  color: var(--text-disabled); font-size: 13px; line-height: 1.4;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.toc a:hover { color: var(--text-primary); text-decoration: none; }
.toc a.on { color: var(--text-display); border-left-color: var(--text-display); }
.toc-meta { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--border); display: grid; gap: 12px; }
.toc-meta .row { display: flex; justify-content: space-between; gap: 8px; }
.toc-meta .v { font: 400 12px/1.2 var(--f-mono); color: var(--text-primary); }

/* ---------- DOC HEADER ---------- */
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 28px; }
.crumbs a, .crumbs span { font: 400 11px/1.2 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary); }
.crumbs .sep { color: var(--text-disabled); }
.doc-code {
  font: 700 clamp(56px, 9vw, 96px)/0.9 var(--f-dot);
  letter-spacing: -0.02em; color: var(--text-display); margin: 0 0 20px;
}
.doc-title {
  font: 400 clamp(30px, 4.2vw, 44px)/1.08 var(--f-sans);
  letter-spacing: -0.025em; color: var(--text-display); margin: 0 0 20px;
  text-wrap: balance;
}
.doc-meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 40px; align-items: center; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 10px; border: 1px solid var(--border-visible); border-radius: 999px;
  font: 400 10px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary);
  white-space: nowrap;
}
.chip b { color: var(--text-display); font-weight: 400; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 18px; border-radius: 999px;
  font: 400 12px/1 var(--f-mono); letter-spacing: 0.06em; text-transform: uppercase;
  border: 1px solid var(--border-visible); color: var(--text-primary);
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.btn:hover { border-color: var(--text-display); color: var(--text-display); text-decoration: none; }
.btn.primary { background: var(--text-display); color: var(--black); border-color: var(--text-display); }
.btn.primary:hover { opacity: .88; color: var(--black); }
.btn.sm { height: 30px; padding: 0 12px; font-size: 10px; }
.btn[aria-pressed="true"] { background: var(--text-display); color: var(--black); border-color: var(--text-display); }

/* ---------- PROSE ---------- */
.prose > * + * { margin-top: 16px; }
:where(.prose) p { margin: 0; }
.prose .lede { font-size: 19px; line-height: 1.55; color: var(--text-display); font-weight: 300; }
.prose h2 {
  display: flex; gap: 14px; align-items: baseline;
  font: 400 24px/1.25 var(--f-sans); letter-spacing: -0.012em; color: var(--text-display);
  margin: 64px 0 20px; padding-top: 24px; border-top: 1px solid var(--border);
}
.prose h2 .num { font: 400 12px/1 var(--f-mono); letter-spacing: 0.06em; color: var(--text-secondary); flex: none; transform: translateY(-3px); }
.prose h2 .anchor { opacity: 0; margin-left: auto; font: 400 12px/1 var(--f-mono); color: var(--text-disabled); transition: opacity .15s; }
.prose h2:hover .anchor { opacity: 1; }
.prose h3 { font: 500 18px/1.3 var(--f-sans); color: var(--text-display); margin: 36px 0 12px; }
.prose h4 { margin: 28px 0 10px; }
.prose ul, .prose ol { margin: 0; padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose li::marker { color: var(--text-disabled); font-family: var(--f-mono); font-size: 13px; }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }

/* formula */
.formula {
  position: relative; margin: 24px 0; padding: 30px 24px 26px;
  border: 1px solid var(--border-visible); border-radius: 12px;
  background-color: var(--surface);
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px); background-size: 12px 12px;
  font: 400 clamp(15px, 2vw, 19px)/1.55 var(--f-mono); color: var(--text-display);
  text-align: center; overflow-x: auto;
}
.formula[data-label]::before {
  content: attr(data-label); position: absolute; top: 10px; left: 14px;
  font: 400 10px/1 var(--f-mono); letter-spacing: 0.1em; color: var(--text-secondary);
}
.formula .sm { display: block; font-size: 0.78em; color: var(--text-secondary); margin-top: 6px; }
.copy-f {
  position: absolute; top: 8px; right: 8px; opacity: 0;
  font: 400 10px/1 var(--f-mono); letter-spacing: 0.08em; color: var(--text-secondary);
  padding: 5px 8px; border: 1px solid var(--border-visible); border-radius: 999px; background: var(--surface);
  transition: opacity .15s;
}
.formula:hover .copy-f { opacity: 1; }

/* callouts */
.ex, .trap, .note, .key {
  margin: 28px 0; padding: 20px 22px; border-radius: 12px;
  border: 1px solid var(--border-visible); background: var(--surface);
}
.ex > * + *, .trap > * + *, .note > * + *, .key > * + * { margin-top: 10px; }
.ex-h, .trap-h, .note-h, .key-h {
  display: flex; gap: 10px; align-items: baseline;
  font: 500 15px/1.4 var(--f-sans); color: var(--text-display);
}
.ex-h::before, .trap-h::before, .note-h::before, .key-h::before {
  flex: none; font: 400 10px/1.4 var(--f-mono); letter-spacing: 0.1em; color: var(--text-secondary);
  padding: 3px 7px; border: 1px solid var(--border-visible); border-radius: 999px; transform: translateY(-2px);
}
.ex-h::before { content: "EXEMPLE"; }
.trap-h::before { content: "PIÈGE"; color: var(--accent); border-color: var(--accent); }
.note-h::before { content: "À RETENIR"; }
.key-h::before { content: "RÈGLE"; color: var(--black); background: var(--text-display); border-color: var(--text-display); }
.trap { border-left: 2px solid var(--accent); }
.key { background: var(--surface-raised); }
.ex p, .trap p, .note p, .key p { font-size: 15px; }
.ex ul, .ex ol, .trap ul, .note ul, .note ol, .key ul, .key ol { font-size: 15px; }
.ex .result { font-family: var(--f-mono); color: var(--text-display); }

/* tables */
.tbl { margin: 24px 0; overflow-x: auto; border: 1px solid var(--border-visible); border-radius: 12px; background: var(--surface); }
.tbl table { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th {
  text-align: left; padding: 12px 14px; vertical-align: bottom;
  font: 400 10px/1.3 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary);
  border-bottom: 1px solid var(--border-visible); background: var(--surface-raised);
}
.tbl td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td.n, .tbl th.n { text-align: right; }
.tbl td.n { font-family: var(--f-mono); font-size: 13px; white-space: nowrap; }
.tbl td.m { font-family: var(--f-mono); font-size: 13px; }
.tbl tr.hl td { color: var(--text-display); background: var(--surface-raised); }
.tbl tr.hl td:first-child { box-shadow: inset 2px 0 0 var(--accent); }
.tbl tr.total td { color: var(--text-display); font-weight: 500; border-top: 1px solid var(--border-visible); }
.tbl caption { caption-side: bottom; text-align: left; padding: 10px 14px; font: 400 11px/1.4 var(--f-mono); color: var(--text-disabled); }
.good { color: var(--success); }
.warn { color: var(--warning); }
.bad { color: var(--accent); }

/* bars */
.bars { margin: 24px 0; padding: 20px 22px; border: 1px solid var(--border-visible); border-radius: 12px; background: var(--surface); }
.bars-h { margin-bottom: 18px; display: flex; justify-content: space-between; gap: 12px; }
.bar-row { display: grid; grid-template-columns: minmax(90px, 180px) 1fr auto; gap: 14px; align-items: center; padding: 7px 0; }
.bar-row .lbl { font-size: 13px; color: var(--text-secondary); line-height: 1.3; }
.bar-row .val { font: 400 13px/1 var(--f-mono); color: var(--text-display); text-align: right; min-width: 88px; }
.bar-row .seg { height: 12px; }
.bar-row .seg i { opacity: 1; }
.bar-row.max .seg i.on { background: var(--text-display); }

/* sim link */
.sim-link {
  display: inline-flex; align-items: center; gap: 8px; margin: 4px 0;
  font: 400 11px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-display); padding: 8px 12px; border: 1px dashed var(--border-visible); border-radius: 999px;
}
.sim-link:hover { border-style: solid; border-color: var(--text-display); text-decoration: none; }

/* quiz / details */
.quiz { margin-top: 72px; padding: 28px 24px; border: 1px solid var(--border-visible); border-radius: 16px; background-color: var(--surface); }
.quiz h2 { margin-top: 0 !important; padding-top: 0 !important; border-top: 0 !important; }
.quiz > ol { list-style: none; padding: 0; counter-reset: q; margin: 0; }
.quiz > ol > li { counter-increment: q; padding: 18px 0 18px 44px; border-top: 1px solid var(--border); position: relative; margin: 0; }
.quiz > ol > li::before {
  content: counter(q, decimal-leading-zero); position: absolute; left: 0; top: 20px;
  font: 400 12px/1 var(--f-mono); color: var(--text-secondary);
}
.quiz > ol > li > p { margin: 0; color: var(--text-primary); }
details { margin-top: 12px; }
summary {
  list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
  font: 400 11px/1 var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-secondary);
  padding: 7px 12px; border: 1px solid var(--border-visible); border-radius: 999px;
  transition: color .15s, border-color .15s;
}
summary::-webkit-details-marker { display: none; }
summary::before { content: "+"; font-size: 13px; }
details[open] > summary { color: var(--text-display); border-color: var(--text-display); }
details[open] > summary::before { content: "−"; }
summary:hover { color: var(--text-display); }
.answer { margin-top: 14px; padding: 14px 16px; border-left: 1px solid var(--text-display); background: var(--surface-raised); border-radius: 0 8px 8px 0; font-size: 15px; }
.answer > * + * { margin-top: 8px; }
:where(.answer) p { margin: 0; }
.answer .m { font-family: var(--f-mono); font-size: 13px; color: var(--text-display); }

/* doc footer */
.doc-foot { margin-top: 72px; }
.done-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 18px 20px; border: 1px solid var(--border-visible); border-radius: 12px; margin-bottom: 20px;
}
.done-bar p { margin: 0; font-size: 14px; color: var(--text-secondary); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pager a {
  display: flex; flex-direction: column; gap: 8px; padding: 18px 20px;
  border: 1px solid var(--border-visible); border-radius: 12px; color: var(--text-primary);
  transition: border-color .2s var(--ease);
}
.pager a:hover { border-color: var(--text-display); text-decoration: none; }
.pager a.next { text-align: right; grid-column: 2; }
.pager .t { font-size: 16px; color: var(--text-display); }

/* ---------- HOME ---------- */
.hero { position: relative; padding: 24px 0 56px; }
.hero-grid { position: absolute; inset: -56px -72px auto -72px; height: 420px; opacity: .5; pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at 30% 30%, #000 20%, transparent 70%); mask-image: radial-gradient(ellipse at 30% 30%, #000 20%, transparent 70%); }
.hero > *:not(.hero-grid) { position: relative; }
.hero-kicker { display: flex; gap: 10px; align-items: center; margin-bottom: 32px; flex-wrap: wrap; }
.dot-live { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font: 300 clamp(44px, 7.4vw, 96px)/0.98 var(--f-sans); letter-spacing: -0.045em;
  color: var(--text-display); margin: 0 0 28px;
}
.hero-sub { font-size: 19px; line-height: 1.55; max-width: 36ch; color: var(--text-secondary); margin: 0 0 36px; font-weight: 300; }
.hero-sub b { color: var(--text-display); font-weight: 400; }
.hero-ctas { display: flex; gap: 10px; flex-wrap: wrap; }
.stats { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; margin: 56px 0 0; }
.stat { padding: 22px 20px; border-right: 1px solid var(--border); }
.stat:last-child { border-right: 0; }
.stat .v { font: 700 44px/1 var(--f-dot); color: var(--text-display); letter-spacing: -0.02em; margin-bottom: 10px; }

.sec { margin-top: 96px; }
.sec-h { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 24px; flex-wrap: wrap; }
.sec-h h2 { font: 400 28px/1.2 var(--f-sans); letter-spacing: -0.02em; color: var(--text-display); margin: 8px 0 0; }

.ladder { border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.rung { display: grid; grid-template-columns: 64px minmax(0, 1fr) minmax(60px, 160px) 96px; gap: 20px; align-items: center; padding: 18px 22px; border-top: 1px solid var(--border); color: var(--text-primary); transition: background .15s var(--ease); }
.rung:hover { background: var(--surface); text-decoration: none; }
.rung:first-child { border-top: 0; }
.rung .lv { font: 700 30px/1 var(--f-dot); color: var(--text-display); }
.rung .nm { font-size: 16px; color: var(--text-display); }
.rung .ds { font-size: 13px; color: var(--text-secondary); margin-top: 4px; line-height: 1.45; }
.rung .top { font: 400 13px/1 var(--f-mono); color: var(--text-display); text-align: right; }
.rung .seg { height: 8px; }

.parts { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.part-card {
  display: flex; flex-direction: column; gap: 14px; padding: 22px; min-height: 220px;
  border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); color: var(--text-primary);
  transition: border-color .2s var(--ease);
}
.part-card:hover { border-color: var(--text-display); text-decoration: none; }
.part-card .top { display: flex; justify-content: space-between; align-items: center; }
.part-card .pn { font: 700 40px/1 var(--f-dot); color: var(--text-display); }
.part-card h3 { margin: 0; font: 400 20px/1.25 var(--f-sans); color: var(--text-display); letter-spacing: -0.01em; }
.part-card p { margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.5; }
.part-card .foot { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }

.todo { border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.todo label { display: flex; gap: 16px; align-items: flex-start; padding: 16px 20px; border-top: 1px solid var(--border); cursor: pointer; transition: background .15s; }
.todo label:first-child { border-top: 0; }
.todo label:hover { background: var(--surface); }
.todo input { position: absolute; opacity: 0; pointer-events: none; }
.todo .box { width: 18px; height: 18px; flex: none; border: 1px solid var(--border-visible); border-radius: 4px; display: grid; place-items: center; margin-top: 2px; transition: .15s; }
.todo .box svg { width: 12px; height: 12px; opacity: 0; color: var(--black); }
.todo input:checked + .box { background: var(--text-display); border-color: var(--text-display); }
.todo input:checked + .box svg { opacity: 1; }
.todo input:checked ~ .tx { color: var(--text-disabled); text-decoration: line-through; }
.todo input:focus-visible + .box { outline: 1px solid var(--interactive); outline-offset: 2px; }
.todo .n { font: 400 11px/1.6 var(--f-mono); color: var(--text-disabled); width: 22px; flex: none; }
.todo .tx { flex: 1; font-size: 15px; }
.todo .tx small { display: block; color: var(--text-secondary); font-size: 13px; margin-top: 2px; }
.todo-foot { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px 20px; border-top: 1px solid var(--border-visible); background: var(--surface); }

.disclaimer { margin-top: 96px; padding: 20px 22px; border: 1px dashed var(--border-visible); border-radius: 12px; font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ---------- SIMULATORS ---------- */
.sims-nav { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.sim { margin: 0 0 24px; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); overflow: hidden; scroll-margin-top: calc(var(--top) + 24px); }
.sim-h { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 22px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.sim-h h3 { margin: 0; font: 400 19px/1.3 var(--f-sans); color: var(--text-display); }
.sim-body { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); }
.sim-in { padding: 20px 22px; border-right: 1px solid var(--border); display: grid; gap: 16px; align-content: start; }
.sim-out { padding: 20px 22px; min-width: 0; }
.field { display: grid; gap: 6px; }
.field .label { display: flex; justify-content: space-between; }
.field input[type="number"], .field select {
  height: 40px; width: 100%; padding: 0 12px; border-radius: 8px;
  background: var(--black); border: 1px solid var(--border-visible); color: var(--text-display);
  font: 400 15px/1 var(--f-mono);
}
.field input[type="number"]:focus, .field select:focus { outline: none; border-color: var(--text-display); }
.field input[type="range"] { width: 100%; accent-color: var(--text-display); }
.check { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-primary); cursor: pointer; }
.check input { accent-color: var(--text-display); width: 16px; height: 16px; }
.readout { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 20px; }
.readout > div { background: var(--surface); padding: 14px 16px; }
.readout .v { font: 400 22px/1.15 var(--f-mono); color: var(--text-display); margin-top: 8px; letter-spacing: -0.02em; word-break: break-word; }
.readout .v.big { font: 700 34px/1 var(--f-dot); }
.readout .v small { font-size: 12px; color: var(--text-secondary); margin-left: 4px; }
.sim-note { font-size: 13px; color: var(--text-secondary); margin: 14px 0 0; line-height: 1.55; }
.dotchart { width: 100%; height: 200px; display: block; }
.legend { display: flex; gap: 18px; margin-top: 10px; flex-wrap: wrap; }
.legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.status-line { font: 400 12px/1.5 var(--f-mono); letter-spacing: 0.04em; text-transform: uppercase; padding: 10px 12px; border: 1px solid var(--border-visible); border-radius: 8px; }

/* ---------- GLOSSARY / CALENDAR / RULES ---------- */
.filter { width: 100%; height: 44px; padding: 0 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border-visible); color: var(--text-display); font: 400 14px/1 var(--f-sans); margin-bottom: 20px; }
.filter:focus { outline: none; border-color: var(--text-display); }
.gloss { display: grid; border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.gloss > div { display: grid; grid-template-columns: 200px 1fr; gap: 20px; padding: 14px 20px; border-top: 1px solid var(--border); }
.gloss > div:first-child { border-top: 0; }
.gloss dt { font: 400 12px/1.5 var(--f-mono); letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-display); }
.gloss dd { margin: 0; font-size: 15px; }
.gloss dd a { font-family: var(--f-mono); font-size: 11px; letter-spacing: .06em; margin-left: 6px; }

.cal { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.cal-m { padding: 18px; border: 1px solid var(--border-visible); border-radius: 12px; background: var(--surface); min-height: 150px; display: flex; flex-direction: column; gap: 10px; }
.cal-m .mn { display: flex; justify-content: space-between; align-items: center; }
.cal-m .mnum { font: 700 28px/1 var(--f-dot); color: var(--text-display); }
.cal-m p { margin: 0; font-size: 14px; }
.cal-m.now { border-color: var(--text-display); }
.cal-m.now .label { color: var(--accent); }
.cal-m.hot { background: var(--surface-raised); }

.rules { counter-reset: r; border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.rule { display: grid; grid-template-columns: 80px 1fr; gap: 16px; padding: 20px 22px; border-top: 1px solid var(--border); align-items: baseline; }
.rule:first-child { border-top: 0; }
.rule .rn { font: 700 34px/1 var(--f-dot); color: var(--text-display); }
.rule p { margin: 0; font-size: 17px; color: var(--text-display); }
.rule p span { color: var(--text-secondary); }

.formulas { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 10px; }
.fcard { position: relative; padding: 18px 18px 20px; border: 1px solid var(--border-visible); border-radius: 12px; background: var(--surface); display: flex; flex-direction: column; gap: 12px; }
.fcard .fh { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.fcard .fx { font: 400 16px/1.5 var(--f-mono); color: var(--text-display); padding: 16px 12px; border-radius: 8px; text-align: center;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px); background-size: 12px 12px; overflow-x: auto; }
.fcard .fn { font-size: 15px; color: var(--text-display); }
.fcard .links { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- SEARCH ---------- */
.search-overlay { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.72); display: none; padding: 10vh 16px 16px; }
:root[data-theme="light"] .search-overlay { background: rgba(245,245,245,.8); }
.search-overlay.open { display: block; }
.search-box { max-width: 680px; margin: 0 auto; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); overflow: hidden; }
.search-in { display: flex; align-items: center; gap: 12px; padding: 0 18px; border-bottom: 1px solid var(--border); }
.search-in svg { width: 18px; height: 18px; color: var(--text-secondary); flex: none; }
.search-in input { flex: 1; height: 58px; border: 0; background: transparent; outline: none; color: var(--text-display); font: 400 18px/1 var(--f-sans); }
.results { max-height: 56vh; overflow-y: auto; padding: 8px; }
.res { display: flex; gap: 14px; align-items: flex-start; padding: 12px; border-radius: 10px; color: var(--text-primary); cursor: pointer; }
.res .rc { font: 400 10px/1.8 var(--f-mono); letter-spacing: 0.06em; color: var(--text-disabled); width: 44px; flex: none; text-transform: uppercase; }
.res .rt { font-size: 15px; color: var(--text-display); }
.res .rx { font-size: 13px; color: var(--text-secondary); margin-top: 3px; line-height: 1.45; }
.res mark { background: transparent; color: var(--text-display); border-bottom: 1px solid var(--accent); }
.res.sel, .res:hover { background: var(--surface-raised); text-decoration: none; }
.search-empty { padding: 28px; text-align: center; }
.search-foot { display: flex; gap: 16px; padding: 10px 18px; border-top: 1px solid var(--border); }

/* toast */
.inline-status { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 120; padding: 10px 16px; border-radius: 999px; background: var(--text-display); color: var(--black); font: 400 11px/1 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; opacity: 0; transition: opacity .2s var(--ease); pointer-events: none; }
.inline-status.on { opacity: 1; }

/* reading progress */
.read-prog { position: fixed; top: var(--top); left: var(--side); right: 0; height: 1px; z-index: 49; background: transparent; }
.read-prog i { display: block; height: 100%; width: 0; background: var(--text-display); }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1280px) {
  .main { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 960px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; top: var(--top); left: 0; bottom: 0; width: min(320px, 88vw); height: auto; z-index: 60;
    background: var(--black); transform: translateX(-100%); transition: transform .25s var(--ease);
  }
  body.nav-open .sidebar { transform: none; }
  body.nav-open .scrim { display: block; }
  .scrim { display: none; position: fixed; inset: var(--top) 0 0 0; z-index: 55; background: rgba(0,0,0,.6); }
  .menu-btn { display: grid; }
  .read-prog { left: 0; }
  .top-progress { display: none; }
  .search-btn { min-width: 0; }
  .search-btn .txt, .search-btn kbd { display: none; }
  .search-btn { width: 36px; padding: 0; justify-content: center; }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .stat:nth-child(3) { border-right: 0; }
  .stat:nth-child(n+4) { border-top: 1px solid var(--border); }
  .sim-body { grid-template-columns: minmax(0, 1fr); }
  .sim-in { border-right: 0; border-bottom: 1px solid var(--border); }
}
@media (max-width: 640px) {
  .brand-ed { display: none; }
  .content { padding: 32px 16px 72px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: 0 !important; border-top: 1px solid var(--border); }
  .stat:nth-child(odd) { border-right: 1px solid var(--border) !important; }
  .stat:first-child, .stat:nth-child(2) { border-top: 0; }
  .stat:last-child { grid-column: span 2; border-right: 0 !important; }
  .rung { grid-template-columns: 52px 1fr; }
  .rung .seg, .rung .top { display: none; }
  .gloss > div { grid-template-columns: 1fr; gap: 4px; }
  .bar-row { grid-template-columns: 1fr auto; }
  .bar-row .seg { grid-column: 1 / -1; grid-row: 2; }
  .pager { grid-template-columns: 1fr; }
  .pager a.next { grid-column: 1; }
  .rule { grid-template-columns: 52px 1fr; }
  .rule .rn { font-size: 26px; }
  .quiz { padding: 22px 16px; }
  .quiz > ol > li { padding-left: 34px; }
  .prose h2 { font-size: 21px; }
  .formula { padding: 30px 14px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

@media print {
  .topbar, .sidebar, .toc, .doc-foot, .read-prog, .sim-link { display: none !important; }
  .shell, .main { display: block; padding: 0; }
  body { background: #fff; color: #000; }
  details { display: block; } details > * { display: block; }
}

/* ---------- additions ---------- */
article[hidden] { display: none !important; }
.prose h2.sr { position: relative; height: 0; margin: 0 !important; padding: 0 !important; border: 0 !important; overflow: hidden; opacity: 0; pointer-events: none; font-size: 0; }
.prose .sim + h2.sr { margin-top: -24px !important; }
.readout.static { margin: 20px 0; }
.doc-head { margin-bottom: 8px; }
.prose > .doc-head + * { margin-top: 0; }
.prose > .doc-foot { margin-top: 72px; }
.prose .sim-h h3 { margin: 0; }
.prose .rules, .prose .formulas, .prose .cal { margin-top: 32px; }
.fcard .label a, .fh a.label { color: var(--text-secondary); }
.fh a.label:hover { color: var(--text-display); text-decoration: none; }
.sim-in .label b { font-weight: 400; }
.chip:is(a, button) { cursor: pointer; transition: border-color .15s, color .15s; }
.chip:is(a, button):hover { color: var(--text-display); border-color: var(--text-display); text-decoration: none; }
.sim .tbl { margin: 0; }
.status-line b { color: var(--text-display); font-weight: 400; }

/* ==========================================================================
   v2 — static pages, newsletter, landing
   ========================================================================== */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.chip.on { color: var(--black); background: var(--text-display); border-color: var(--text-display); }

/* newsletter */
.nl-form { display: grid; gap: 10px; }
.nl-row { display: flex; gap: 8px; flex-wrap: wrap; }
.nl-row input[type="email"] {
  flex: 1 1 220px; height: 44px; padding: 0 18px; border-radius: 999px;
  background: var(--black); border: 1px solid var(--border-visible); color: var(--text-display);
  font: 400 15px/1 var(--f-sans);
}
.nl-row input[type="email"]:focus { outline: none; border-color: var(--text-display); }
.nl-row .btn { height: 44px; }
.nl-legal { margin: 0; font-size: 12px; color: var(--text-disabled); line-height: 1.5; }
.nl-legal a { color: var(--text-secondary); text-decoration: underline; text-underline-offset: 2px; }
.nl-msg { margin: 0; font: 400 11px/1.5 var(--f-mono); letter-spacing: .04em; text-transform: uppercase; min-height: 0; }
.nl-msg:empty { display: none; }
.nl-box {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; align-items: center;
  margin-top: 40px; padding: 26px; border: 1px solid var(--border-visible); border-radius: 16px;
  background-color: var(--surface);
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px); background-size: 14px 14px;
}
.nl-box .label { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.nl-box h3 { margin: 0 0 8px; font: 400 19px/1.3 var(--f-sans); color: var(--text-display); letter-spacing: -0.01em; }
.nl-box p { margin: 0; font-size: 14px; color: var(--text-secondary); }
.side-kit { display: flex; flex-direction: column; gap: 6px; padding: 14px; margin-bottom: 16px; border: 1px dashed var(--border-visible); border-radius: 10px; color: var(--text-display); font-size: 14px; }
.side-kit:hover { border-style: solid; text-decoration: none; }
.toc-kit { display: flex !important; flex-direction: column; gap: 6px; margin-top: 8px; padding: 12px !important; border: 1px dashed var(--border-visible) !important; border-radius: 10px; color: var(--text-display) !important; font-size: 13px; }

/* simulator cards */
.sim-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 10px; margin-top: 24px; }
.sim-card { display: flex; flex-direction: column; gap: 10px; padding: 18px; min-height: 150px; border: 1px solid var(--border-visible); border-radius: 12px; background: var(--surface); color: var(--text-primary); transition: border-color .2s var(--ease); }
.sim-card:hover { border-color: var(--text-display); text-decoration: none; }
.sim-card h3 { margin: 0; font: 400 16px/1.35 var(--f-sans); color: var(--text-display); }
.sim-card p { margin: 0; font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.sim-card .go { margin-top: auto; color: var(--text-display); }
.prose .sim-grid { margin-top: 32px; }
.prose .sims-nav { margin: 28px 0; }

/* site footer */
.site-foot { max-width: 1040px; margin: 96px auto 0; padding-top: 32px; border-top: 1px solid var(--border); }
.sf-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 32px; }
.sf-grid > div { display: flex; flex-direction: column; gap: 10px; }
.sf-grid a:not(.brand) { color: var(--text-secondary); font-size: 14px; }
.sf-grid a:not(.brand):hover { color: var(--text-display); }
.sf-brand p { margin: 8px 0 0; font-size: 12px; color: var(--text-disabled); line-height: 1.6; max-width: 36ch; }
.sf-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 32px; padding: 20px 0 8px; border-top: 1px solid var(--border); color: var(--text-disabled); }

/* ---------- landing ---------- */
body.landing { overflow-x: clip; }
.l-wrap { max-width: 1160px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); }
.l-nav {
  position: sticky; top: 0; z-index: 50; height: 64px; display: flex; align-items: center; gap: 24px;
  padding: 0 clamp(16px, 4vw, 40px); background: color-mix(in srgb, var(--black) 86%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border);
}
.l-links { display: flex; gap: 26px; margin: 0 auto; }
.l-links a { white-space: nowrap; font: 400 11px/1 var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text-secondary); }
.l-links a:hover { color: var(--text-display); text-decoration: none; }
.l-actions { display: flex; gap: 8px; align-items: center; }
.l-hero { position: relative; padding: clamp(56px, 9vw, 120px) 0 72px; }
.l-hero .hero-grid { position: absolute; inset: 0; height: auto; opacity: .55; -webkit-mask-image: radial-gradient(ellipse at 25% 35%, #000 10%, transparent 65%); mask-image: radial-gradient(ellipse at 25% 35%, #000 10%, transparent 65%); }
.l-hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.l-hero h1 { font: 300 clamp(48px, 7.6vw, 104px)/0.96 var(--f-sans); letter-spacing: -0.05em; color: var(--text-display); margin: 0 0 28px; }
.l-hero h1 .dim { color: var(--text-disabled); }
.l-hero .hero-sub { max-width: 44ch; }
.l-proof { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 28px; }
.l-proof span::before { content: "✓ "; color: var(--text-display); }

.instrument { position: relative; padding: 22px; border: 1px solid var(--border-visible); border-radius: 20px; background: var(--surface); display: grid; gap: 18px; }
.inst-h { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.inst-big .label { display: block; margin-bottom: 10px; }
.doto { font: 700 clamp(44px, 6vw, 76px)/0.95 var(--f-dot); letter-spacing: -0.02em; color: var(--text-display); }
.inst-big .doto { color: var(--accent); }
.inst-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.inst-row > div { background: var(--surface); padding: 12px 14px; }
.inst-row .v { font: 400 20px/1.2 var(--f-mono); color: var(--text-display); margin-top: 6px; }
.instrument input[type="range"] { width: 100%; accent-color: var(--text-display); }
.inst-note { margin: 0; font-size: 12px; color: var(--text-secondary); line-height: 1.55; }

.l-sec { margin-top: clamp(80px, 11vw, 136px); }
.l-sec .sec-h h2 { max-width: 30ch; }
.l-facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.fact { display: flex; flex-direction: column; gap: 14px; padding: 22px; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); color: var(--text-primary); min-height: 250px; transition: border-color .2s var(--ease); }
.fact:hover { border-color: var(--text-display); text-decoration: none; }
.fact .doto { font-size: clamp(36px, 4vw, 52px); }
.fact p { margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.55; }
.fact .label { margin-top: auto; }
.landing .rung { grid-template-columns: 64px minmax(0, 1fr) 90px 96px; }

.prog { display: grid; border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.prog-part { margin: 0; border-top: 1px solid var(--border); }
.prog-part:first-child { border-top: 0; }
.prog-part > summary {
  display: grid; grid-template-columns: 64px 1fr auto auto; gap: 16px; align-items: center; width: 100%;
  padding: 18px 22px; border: 0; border-radius: 0; font: 400 16px/1.3 var(--f-sans); letter-spacing: 0; text-transform: none; color: var(--text-display);
}
.prog-part > summary::before { display: none; }
.prog-part > summary:hover { background: var(--surface); }
.prog-part[open] > summary { background: var(--surface); }
.prog-part .pn { font: 700 28px/1 var(--f-dot); }
.prog-part ol { list-style: none; margin: 0; padding: 4px 22px 18px 102px; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 2px 20px; background: var(--surface); }
.prog-part li a { display: flex; gap: 10px; padding: 6px 0; font-size: 14px; color: var(--text-secondary); }
.prog-part li a:hover { color: var(--text-display); text-decoration: none; }
.prog-part li .code { font: 400 10px/1.9 var(--f-mono); color: var(--text-disabled); width: 30px; flex: none; }

.l-cases { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.case { display: flex; flex-direction: column; gap: 12px; padding: 20px; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); color: var(--text-primary); transition: border-color .2s var(--ease); }
.case:hover { border-color: var(--text-display); text-decoration: none; }
.case h3 { margin: 0; font: 400 17px/1.3 var(--f-sans); color: var(--text-display); }
.case .doto { font-size: clamp(30px, 3vw, 40px); margin-top: auto; }
.case p { margin: 0; font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

.kit { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: center; padding: clamp(24px, 4vw, 48px); border: 1px solid var(--border-visible); border-radius: 24px; background: var(--surface); }
.kit-txt > .label { display: flex; align-items: center; gap: 8px; }
.kit h2 { font: 400 clamp(26px, 3.2vw, 38px)/1.12 var(--f-sans); letter-spacing: -0.025em; color: var(--text-display); margin: 14px 0 14px; }
.kit-txt > p { color: var(--text-secondary); margin: 0 0 20px; }
.kit-list { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--border); }
.kit-list li { display: flex; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.kit-list span { font: 400 11px/1.9 var(--f-mono); color: var(--text-disabled); }
.kit-doc { position: relative; aspect-ratio: 0.72; max-width: 330px; margin: 0 auto; width: 100%; }
.kd-page { position: absolute; inset: 0; border-radius: 10px; background: #f5f5f5; color: #000; padding: 24px; display: flex; flex-direction: column; gap: 14px; border: 1px solid #ddd; }
.kd-back { transform: rotate(5deg) translate(14px, 8px); background: #e6e6e6; }
.kd-page:not(.kd-back) { transform: rotate(-2deg); background-image: radial-gradient(circle, #ddd 1px, transparent 1px); background-size: 12px 12px; background-color: #f5f5f5; }
.kd-top, .kd-foot { display: flex; justify-content: space-between; align-items: center; font: 400 9px/1 var(--f-mono); letter-spacing: .1em; color: #666; }
.kd-foot { margin-top: auto; }
.kd-num { font: 700 120px/0.85 var(--f-dot); margin-top: 18px; }
.kd-title { font: 400 30px/1.05 var(--f-sans); letter-spacing: -0.03em; }
.kd-lines { display: grid; gap: 7px; margin-top: 8px; }
.kd-lines i { display: block; height: 5px; background: #ccc; border-radius: 1px; }
.kd-lines i:nth-child(odd) { width: 86%; } .kd-lines i:nth-child(3n) { width: 62%; }
.kd-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.l-principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.l-principles > div { padding: 22px; border: 1px solid var(--border-visible); border-radius: 16px; }
.l-principles h3 { margin: 14px 0 8px; font: 400 18px/1.3 var(--f-sans); color: var(--text-display); }
.l-principles p { margin: 0; font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

.faqs { border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.faq { margin: 0; border-top: 1px solid var(--border); }
.faq:first-child { border-top: 0; }
.faq > summary { display: flex; width: 100%; padding: 18px 22px; border: 0; border-radius: 0; font: 400 16px/1.4 var(--f-sans); letter-spacing: 0; text-transform: none; color: var(--text-display); }
.faq > summary::before { order: 2; margin-left: auto; font: 400 16px/1 var(--f-mono); color: var(--text-secondary); }
.faq > summary:hover { background: var(--surface); }
.faq[open] > summary { border: 0; }
.faq-a { padding: 0 22px 20px; color: var(--text-secondary); font-size: 15px; max-width: 72ch; }
.faq-a p { margin: 0; }

.l-final { padding: clamp(32px, 6vw, 72px); border: 1px solid var(--border-visible); border-radius: 24px; text-align: center; display: grid; justify-items: center; gap: 16px; }
.l-final h2 { font: 300 clamp(30px, 4.4vw, 56px)/1.05 var(--f-sans); letter-spacing: -0.035em; color: var(--text-display); margin: 0; max-width: 20ch; }
.l-final > p { color: var(--text-secondary); max-width: 52ch; margin: 0; }
.l-final .nl-form { width: 100%; max-width: 520px; text-align: left; }
.landing .site-foot { max-width: 1160px; padding-left: clamp(16px, 4vw, 40px); padding-right: clamp(16px, 4vw, 40px); margin-bottom: 24px; }

@media (max-width: 1080px) {
  .l-links { display: none; }
  .l-actions { margin-left: auto; }
  .l-facts { grid-template-columns: repeat(2, 1fr); }
  .l-cases { grid-template-columns: repeat(2, 1fr); }
  .l-cases .case:last-child { grid-column: span 2; }
}
@media (max-width: 900px) {
  .l-links { display: none; }
  .l-actions { margin-left: auto; }
  .l-hero-grid, .kit, .nl-box { grid-template-columns: minmax(0, 1fr); }
  .l-principles { grid-template-columns: 1fr; }
  .sf-grid { grid-template-columns: 1fr 1fr; }
  .sf-brand { grid-column: span 2; }
  .prog-part ol { padding-left: 22px; }
  .kit-doc { max-width: 260px; }
}
@media (max-width: 640px) {
  .sm-hide { display: none; }
  .l-facts, .l-cases { grid-template-columns: 1fr; }
  .l-cases .case:last-child { grid-column: auto; }
  .prog-part > summary { grid-template-columns: 44px 1fr auto; }
  .prog-part .pc { display: none; }
  .landing .rung { grid-template-columns: 52px 1fr; }
  .landing .rung > .label, .landing .rung .top { display: none; }
  .nl-row .btn { width: 100%; }
  .kit-doc { display: none; }
}
.hero-kicker { flex-wrap: nowrap; align-items: flex-start; }
.hero-kicker .dot-live { flex: none; margin-top: 2px; }
.l-sec, #kit, #programme, #cas, #faq { scroll-margin-top: 88px; }

/* ---------- espace membre ---------- */
.account-btn { position: relative; }
.account-btn.signed::after { content: ""; position: absolute; top: 5px; right: 5px; width: 6px; height: 6px; border-radius: 50%; background: var(--success); }
.auth-page { max-width: 640px; }
.auth-card { margin-top: 32px; padding: 26px; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); display: grid; gap: 16px; }
.auth-card .label { display: block; margin-bottom: 6px; }
.auth-or { display: flex; align-items: center; gap: 12px; margin: 0 !important; }
.auth-or::before, .auth-or::after { content: ""; flex: 1; border-top: 1px solid var(--border); }
.google-btn { width: 100%; height: 44px; }
.auth-why { display: grid; gap: 1px; margin-top: 28px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--border); }
.auth-why > div { display: grid; grid-template-columns: 36px 1fr; gap: 10px; padding: 14px 16px; background: var(--black); }
.auth-why p { margin: 0; font-size: 14px; color: var(--text-secondary); }
.acc-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; padding: 22px; border: 1px solid var(--border-visible); border-radius: 16px; background: var(--surface); }
.acc-form input[type="text"] { height: 40px; width: 100%; padding: 0 12px; border-radius: 8px; background: var(--black); border: 1px solid var(--border-visible); color: var(--text-display); font: 400 15px/1 var(--f-sans); }
.acc-form input[type="text"]:focus { outline: none; border-color: var(--text-display); }
.acc-actions { grid-column: 1 / -1; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 12px; }
.acc-danger { display: grid; border: 1px solid var(--border-visible); border-radius: 16px; overflow: hidden; }
.acc-danger > div { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 20px; border-top: 1px solid var(--border); }
.acc-danger > div:first-child { border-top: 0; }
.acc-danger p { margin: 0; font-size: 15px; }
.acc-danger .dz { background: var(--accent-subtle); }
.acc-danger > .nl-msg { padding: 0 20px 14px; }
.muted { color: var(--text-secondary); font-size: 13px; }
.btn.danger { border-color: var(--accent); color: var(--accent); }
.btn.danger:hover { background: var(--accent); color: #fff; }
.btn:disabled, .btn[disabled] { opacity: .4; pointer-events: none; }
@media (max-width: 640px) { .acc-form { grid-template-columns: 1fr; } .acc-danger > div { flex-direction: column; align-items: flex-start; } }

/* ---------- mur souple (compte gratuit) ---------- */
.gate { display: none; }
.anon .gate {
  display: block; position: relative; z-index: 1; margin: -40px 0 0; padding: 28px;
  border: 1px solid var(--text-display); border-radius: 16px; background: var(--surface);
}
.anon .gate .label { display: flex; align-items: center; gap: 8px; }
.gate-h { margin: 12px 0 8px !important; font: 400 26px/1.15 var(--f-sans); letter-spacing: -0.02em; color: var(--text-display); }
.gate-p { margin: 0 0 18px !important; color: var(--text-secondary); font-size: 15px; }
.gate .nl-form { margin-top: 0; }
.gate-opt { font-size: 13px; color: var(--text-secondary); }
.gate .google-btn { margin-top: 12px; }
.gate .nl-legal { margin-top: 14px !important; }
.anon .gate-rest {
  max-height: 280px; overflow: hidden; pointer-events: none; user-select: none;
  -webkit-mask-image: linear-gradient(#000 20%, transparent 100%); mask-image: linear-gradient(#000 20%, transparent 100%);
}
.anon article[data-gated] .done-bar { display: none; }
@media print { .anon .gate-rest { max-height: none; -webkit-mask-image: none; mask-image: none; } }

/* ---------- cadenas (visiteurs sans compte) ---------- */
.lock { display: none; width: 13px; height: 13px; flex: none; color: var(--text-disabled); }
.anon [data-gated] .lock { display: inline-block; }
.anon .nav-link[data-gated] .chk { display: none; }
.anon .nav-link[data-gated] .t { color: var(--text-disabled); }
.anon .nav-link[data-gated]:hover .t, .anon .nav-link[data-gated].active .t { color: var(--text-display); }
.anon .nav-link[data-gated].active .lock { color: var(--text-display); }
.pager .t .lock { width: 14px; height: 14px; margin-left: 8px; vertical-align: -1px; }
.prog-part li a .lock { margin-left: auto; align-self: center; }
.prog-part li a { align-items: baseline; }
/* le mur : juste après l'introduction, aperçu très court */
.anon .gate-rest { max-height: 120px; }
.anon article[data-gated] .nl-box { display: none; }

/* ---------- connexion : onglets et mot de passe ---------- */
.auth-tabs { display: flex; gap: 8px; }
.auth-tabs .chip { height: 32px; padding: 0 14px; }
.auth-form { display: grid; gap: 14px; }
.auth-form input[type="email"], .auth-form input[type="password"], .acc-form input[type="password"] {
  height: 44px; width: 100%; padding: 0 16px; border-radius: 10px; background: var(--black);
  border: 1px solid var(--border-visible); color: var(--text-display); font: 400 15px/1 var(--f-sans);
}
.auth-form input:focus, .acc-form input[type="password"]:focus { outline: none; border-color: var(--text-display); }
.auth-form .acc-actions { margin-top: 4px; }
.auth-hint { margin: 10px 0 0 !important; font-size: 13px; color: var(--text-secondary); }
.link-btn { font: 400 13px/1 var(--f-sans); color: var(--text-secondary); text-decoration: underline; text-underline-offset: 3px; padding: 8px 4px; margin-left: auto; }
.link-btn:hover { color: var(--text-display); }
[data-panel][hidden] { display: none !important; }