/* Sens & vie — feuille de style
   Deux voix : la machine (mono, gris) dit « comment » ; l'humain (serif italique, ocre) dit « pourquoi ».
   Le fil ocre vertical relie l'une à l'autre : c'est le passage, la descente en profondeur. */

:root {
  --paper: #E7EAE6;
  --paper-2: #DCE0DB;
  --paper-3: #CDD3CC;
  --ink: #141E27;
  --ink-2: #3A4751;
  --machine: #5E6A73;
  --or: #B5801F;
  --or-ink: #85590F;
  --rule: rgba(20, 30, 39, .16);
  --veil: rgba(231, 234, 230, .88);

  --f-display: "Gloock", "Georgia", serif;
  --f-text: "Newsreader", "Georgia", serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --measure: 38rem;
  --margin-col: 15rem;
  --gutter: clamp(16px, 4vw, 40px);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #10171D;
    --paper-2: #18222A;
    --paper-3: #222E37;
    --ink: #E5E3DB;
    --ink-2: #B3B8B8;
    --machine: #8C979F;
    --or: #E3A94A;
    --or-ink: #E9B65F;
    --rule: rgba(229, 227, 219, .14);
    --veil: rgba(16, 23, 29, .88);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #10171D;
  --paper-2: #18222A;
  --paper-3: #222E37;
  --ink: #E5E3DB;
  --ink-2: #B3B8B8;
  --machine: #8C979F;
  --or: #E3A94A;
  --or-ink: #E9B65F;
  --rule: rgba(229, 227, 219, .14);
  --veil: rgba(16, 23, 29, .88);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-text);
  font-size: 1.1875rem;
  line-height: 1.62;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration-color: var(--or); text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { color: var(--or-ink); }
:focus-visible { outline: 2px solid var(--or-ink); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--or); color: var(--paper); }

h1, h2, h3 { font-family: var(--f-display); font-weight: 400; line-height: 1.08; letter-spacing: -.01em; margin: 0; text-wrap: balance; }
p { margin: 0 0 1.05em; text-wrap: pretty; }
em { font-style: italic; }

.wrap { max-width: 74rem; margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--f-mono); }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 50; }
.skip:focus { left: 1rem; }

/* Les deux voix */
.how {
  font-family: var(--f-mono);
  font-size: .95rem;
  line-height: 1.4;
  color: var(--machine);
  letter-spacing: -.01em;
  margin: 0;
}
.why { font-family: var(--f-text); font-style: italic; color: var(--or-ink); font-weight: 500; }

/* Le fil */
.thread {
  display: block;
  width: 1px;
  height: 4.5rem;
  background: linear-gradient(var(--machine), var(--or));
  margin: 1.1rem 0 1.4rem;
  transform-origin: top;
  animation: descend 1.1s cubic-bezier(.6, 0, .2, 1) .25s both;
}
@keyframes descend { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.rise { animation: rise .9s cubic-bezier(.2, .6, .2, 1) both; }
.rise-2 { animation-delay: 1.05s; }
.rise-3 { animation-delay: 1.3s; }
.rise-4 { animation-delay: 1.5s; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* ---------- En-tête ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: var(--veil);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-head .wrap { display: flex; align-items: baseline; justify-content: space-between; gap: .5rem 1.5rem; flex-wrap: wrap; padding-top: .9rem; padding-bottom: .9rem; }
.logo { font-family: var(--f-display); font-size: 1.45rem; text-decoration: none; letter-spacing: -.01em; white-space: nowrap; }
.logo i { font-family: var(--f-text); font-style: italic; color: var(--or-ink); padding: 0 .08em; }
.site-nav { display: flex; gap: .3rem 1.4rem; flex-wrap: wrap; font-family: var(--f-mono); font-size: .8rem; }
.site-nav a { text-decoration: none; color: var(--ink-2); padding: .15rem 0; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--or); }

.progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: var(--or); transform-origin: left; transform: scaleX(0); z-index: 30; }

/* ---------- Accueil ---------- */
.hero { min-height: calc(100svh - 4rem); display: flex; flex-direction: column; justify-content: center; padding-top: 4rem; padding-bottom: 5rem; }
.stream { font-family: var(--f-mono); font-size: clamp(.95rem, 1.6vw, 1.1rem); color: var(--machine); min-height: 1.5em; margin: 0; }
.stream .caret { display: inline-block; width: .55em; height: 1.05em; background: var(--machine); vertical-align: -.15em; margin-left: .1em; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero h1 { font-size: clamp(2.55rem, 7.2vw, 5.9rem); line-height: 1.02; max-width: 15ch; }
.hero h1 .w-how { font-family: var(--f-mono); font-size: .56em; color: var(--machine); letter-spacing: -.04em; vertical-align: .08em; }
.hero h1 .w-why { font-family: var(--f-text); font-style: italic; font-weight: 500; color: var(--or-ink); letter-spacing: -.02em; }
.hero .lead { max-width: 34rem; font-size: clamp(1.15rem, 1.8vw, 1.32rem); color: var(--ink-2); margin-top: 2rem; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem 1.6rem; margin-top: 1.6rem; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: .6rem;
  font-family: var(--f-mono); font-size: .85rem; text-decoration: none;
  background: var(--ink); color: var(--paper); padding: .85rem 1.25rem; border-radius: 2px;
}
.btn:hover { background: var(--or-ink); color: var(--paper); }
.link-arrow { font-family: var(--f-mono); font-size: .85rem; text-decoration: none; border-bottom: 1px solid var(--or); padding-bottom: .1rem; }

.section { padding: clamp(4rem, 9vw, 7.5rem) 0; border-top: 1px solid var(--rule); }
.eyebrow { font-family: var(--f-mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--machine); margin: 0 0 1.1rem; }
.section h2 { font-size: clamp(2rem, 4.4vw, 3.3rem); max-width: 22ch; }
.section .intro { max-width: var(--measure); color: var(--ink-2); margin-top: 1.4rem; font-size: 1.22rem; }

/* Manifeste */
.manifesto { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
.manifesto__text { max-width: var(--measure); }
.manifesto__text p:first-of-type::first-letter { font-family: var(--f-display); float: left; font-size: 3.6em; line-height: .85; padding: .06em .1em 0 0; color: var(--or-ink); }
.epigraph { margin: 0; padding: 1.6rem 0 0; border-top: 1px solid var(--rule); max-width: 26rem; }
.epigraph p { font-style: italic; font-size: 1.45rem; line-height: 1.35; margin: 0 0 .7rem; }
.epigraph p .how { font-size: .82em; font-style: normal; }
.epigraph p .why { font-weight: 500; }
.epigraph cite { font-family: var(--f-mono); font-size: .78rem; font-style: normal; color: var(--machine); }
@media (min-width: 960px) {
  .manifesto { grid-template-columns: minmax(0, 1fr) 22rem; gap: 5rem; align-items: start; }
  .epigraph { position: sticky; top: 7rem; }
}

/* Cartes des vertiges */
.vertiges { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; margin-top: 3rem; border-top: 1px solid var(--rule); }
@media (min-width: 760px) { .vertiges { grid-template-columns: repeat(2, minmax(0, 1fr)); } .vertiges .card:nth-child(odd) { border-right: 1px solid var(--rule); } }
.card {
  position: relative; display: block; text-decoration: none; color: inherit;
  padding: 2rem 1.6rem 2.2rem 1.9rem; border-bottom: 1px solid var(--rule);
  transition: background .3s;
}
.card::before { content: ""; position: absolute; left: 0; top: 2.1rem; width: 1px; height: calc(100% - 4.2rem); background: linear-gradient(var(--machine), var(--or)); transform: scaleY(0); transform-origin: top; transition: transform .45s cubic-bezier(.6, 0, .2, 1); }
.card:hover, .card:focus-visible { background: var(--paper-2); color: inherit; }
.card:hover::before, .card:focus-visible::before { transform: scaleY(1); }
.card .how { font-size: .85rem; margin-bottom: .9rem; }
.card h3 { font-size: clamp(1.55rem, 2.6vw, 2.05rem); margin-bottom: .9rem; }
.card p { color: var(--ink-2); font-size: 1.05rem; margin: 0 0 1.1rem; max-width: 30rem; }
.card .meta { font-family: var(--f-mono); font-size: .75rem; color: var(--machine); }

/* Chemin des questions de fond */
.path { list-style: none; margin: 3rem 0 0; padding: 0; border-top: 1px solid var(--rule); }
.path li { border-bottom: 1px solid var(--rule); }
.path a { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); gap: .3rem 1.2rem; padding: 1.8rem .4rem; text-decoration: none; color: inherit; transition: background .3s, padding .3s; }
.path a:hover, .path a:focus-visible { background: var(--paper-2); color: inherit; }
.path .num { font-family: var(--f-text); font-style: italic; font-size: 1.6rem; color: var(--or-ink); line-height: 1.1; grid-row: span 2; }
.path h3 { font-size: clamp(1.45rem, 3vw, 2.2rem); }
.path p { margin: .5rem 0 0; color: var(--ink-2); font-size: 1.05rem; max-width: 36rem; }
@media (min-width: 860px) {
  .path a { grid-template-columns: 5rem minmax(0, 1.25fr) minmax(0, 1fr); align-items: baseline; }
  .path .num { grid-row: auto; }
  .path p { margin: 0; }
}

/* Intuitions */
.intuitions { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
@media (min-width: 960px) { .intuitions { grid-template-columns: 20rem minmax(0, 1fr); gap: 5rem; } .intuitions__head { position: sticky; top: 7rem; align-self: start; } }
.intuitions__list { list-style: none; margin: 0; padding: 0; max-width: var(--measure); }
.intuitions__list li { padding: 0 0 2.1rem; margin: 0 0 2.1rem; border-bottom: 1px solid var(--rule); }
.intuitions__list li:last-child { border-bottom: 0; }
.intuitions__list h3 { font-family: var(--f-text); font-style: italic; font-weight: 500; font-size: 1.55rem; line-height: 1.25; margin-bottom: .7rem; }
.intuitions__list p { color: var(--ink-2); margin: 0; }
.intuitions__list a { font-family: var(--f-mono); font-size: .8rem; white-space: nowrap; }

/* Bandeau final */
.duo { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); margin-top: 2.5rem; }
@media (min-width: 760px) { .duo { grid-template-columns: 1fr 1fr; } }
.duo a { background: var(--paper); padding: 2.2rem 2rem; text-decoration: none; color: inherit; display: block; transition: background .3s; }
.duo a:hover { background: var(--paper-2); color: inherit; }
.duo h3 { font-size: 1.9rem; margin-bottom: .7rem; }
.duo p { color: var(--ink-2); margin: 0 0 1rem; font-size: 1.05rem; }

/* ---------- Pied de page ---------- */
.site-foot { border-top: 1px solid var(--rule); padding: 3rem 0 3.5rem; font-size: .95rem; color: var(--ink-2); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 1rem 3rem; justify-content: space-between; }
.site-foot p { max-width: 32rem; margin: 0; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: .4rem 1.4rem; font-family: var(--f-mono); font-size: .8rem; }
.site-foot nav a { text-decoration: none; }

/* ---------- Essai ---------- */
.col { max-width: var(--measure); margin: 0 auto; padding: 0 var(--gutter); box-sizing: content-box; }
@media (min-width: 1140px) {
  .col { max-width: var(--measure); padding-right: calc(var(--margin-col) + 3rem); padding-left: 3rem; }
}
.essay-head { padding: clamp(3.5rem, 8vw, 6rem) 0 2.5rem; }
.essay-head .eyebrow { margin-bottom: 2.2rem; }
.essay-head .how { font-size: clamp(1rem, 1.7vw, 1.12rem); }
.essay-head h1 { font-size: clamp(2.3rem, 5.4vw, 3.9rem); line-height: 1.04; }
.essay-head .lede { font-size: clamp(1.2rem, 2vw, 1.38rem); line-height: 1.5; color: var(--ink-2); margin-top: 1.8rem; }
.essay-head .meta { font-family: var(--f-mono); font-size: .75rem; color: var(--machine); margin-top: 1.6rem; }

.prose { padding-bottom: 2rem; hyphens: auto; -webkit-hyphens: auto; }
.prose > section { margin-top: 3.4rem; }
.prose h2 { font-size: clamp(1.55rem, 2.8vw, 1.95rem); margin: 0 0 1.2rem; }
.prose h2 .k { display: block; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--machine); margin-bottom: .7rem; }
.prose strong { font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.2rem; margin: 0 0 1.1em; }
.prose li { margin-bottom: .45em; }
.prose li::marker { color: var(--or); }

/* Notes en marge */
.note { font-size: .93rem; line-height: 1.5; color: var(--ink-2); border-left: 1px solid var(--or); padding: .1rem 0 .1rem 1rem; margin: 1.4rem 0; hyphens: manual; }
.note b { display: block; font-family: var(--f-mono); font-weight: 400; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--machine); margin-bottom: .3rem; }
.note p { margin: 0 0 .5em; }
.note p:last-child { margin: 0; }
@media (min-width: 1140px) {
  .note { float: right; clear: right; width: var(--margin-col); margin: .35rem calc(-1 * (var(--margin-col) + 3rem)) 1.2rem 0; }
}

blockquote.citation { margin: 2.2rem 0; padding: 0 0 0 1.4rem; border-left: 2px solid var(--or); }
blockquote.citation p { font-style: italic; font-size: clamp(1.3rem, 2.4vw, 1.55rem); line-height: 1.38; margin: 0 0 .7rem; }
blockquote.citation cite { font-family: var(--f-mono); font-size: .76rem; font-style: normal; color: var(--machine); }

.box { background: var(--paper-2); padding: 1.5rem 1.6rem; margin: 2.4rem 0; border-radius: 3px; }
.box > .label { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--machine); margin: 0 0 .6rem; }
.box > .label.reply { color: var(--or-ink); margin-top: 1.2rem; }
.box p { font-size: 1.08rem; }
.box p:last-child { margin-bottom: 0; }

/* Trois théories (comparaison) */
.trio { display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); margin: 1.8rem 0 2.2rem; }
.trio > div { background: var(--paper); padding: 1.3rem 1.4rem; }
.trio h3 { font-size: 1.35rem; margin-bottom: .5rem; }
.trio p { font-size: 1.02rem; margin: 0 0 .5rem; }
.trio p:last-child { margin: 0; }
.trio .pro, .trio .con { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .06em; text-transform: uppercase; margin-right: .4rem; }
.trio .pro { color: var(--or-ink); }
.trio .con { color: var(--machine); }

/* Critères */
.criteria { list-style: none; padding: 0 !important; counter-reset: c; }
.criteria li { position: relative; padding: .9rem 0 .9rem 2.6rem; border-bottom: 1px solid var(--rule); margin: 0 !important; }
.criteria li::before { counter-increment: c; content: counter(c); position: absolute; left: 0; top: .85rem; font-family: var(--f-text); font-style: italic; color: var(--or-ink); font-size: 1.25rem; }

/* La question qui reste */
.pause { margin: 4.5rem 0 3rem; padding-top: 0; }
.pause .thread { animation: none; margin: 0 0 1.5rem; height: 3.5rem; }
.pause .label { font-family: var(--f-mono); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--machine); margin: 0 0 .9rem; }
.pause .q { font-style: italic; font-size: clamp(1.45rem, 3vw, 1.95rem); line-height: 1.32; margin-bottom: 1.3rem; }

.reading { border-top: 1px solid var(--rule); padding-top: 2rem; margin-top: 3rem; }
.reading h2 { font-size: 1.4rem; margin-bottom: 1rem; }
.reading ul { list-style: none; padding: 0; margin: 0; }
.reading li { padding: .55rem 0; border-bottom: 1px dotted var(--rule); font-size: 1.02rem; }
.reading li span { color: var(--ink-2); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--rule); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin-top: 4rem; }
.pager a { background: var(--paper); padding: 1.5rem var(--gutter); text-decoration: none; color: inherit; display: block; transition: background .3s; }
.pager a:hover { background: var(--paper-2); color: inherit; }
.pager .dir { display: block; font-family: var(--f-mono); font-size: .72rem; color: var(--machine); margin-bottom: .35rem; }
.pager .t { font-family: var(--f-display); font-size: clamp(1.05rem, 2vw, 1.35rem); line-height: 1.2; }
.pager a.next { text-align: right; }
.pager span.empty { background: var(--paper); }

/* ---------- Carnet ---------- */
.carnet-tools { display: flex; flex-wrap: wrap; gap: .8rem 1.4rem; align-items: center; margin: 2rem 0 1rem; font-family: var(--f-mono); font-size: .8rem; color: var(--machine); }
.carnet-tools button { font: inherit; color: var(--ink); background: none; border: 1px solid var(--rule); padding: .6rem 1rem; border-radius: 2px; cursor: pointer; }
.carnet-tools button:hover { border-color: var(--or); color: var(--or-ink); }
.carnet-tools .status { min-width: 10ch; }
.entry { margin: 3rem 0 0; scroll-margin-top: 8.5rem; }
.entry .from { font-family: var(--f-mono); font-size: .72rem; color: var(--machine); margin: 0 0 .5rem; }
.entry .from a { text-decoration: none; border-bottom: 1px solid var(--or); }
.entry label { display: block; font-style: italic; font-size: clamp(1.25rem, 2.4vw, 1.5rem); line-height: 1.35; margin-bottom: .4rem; }
.entry .hint { font-size: .98rem; color: var(--ink-2); margin: 0 0 .9rem; }
.entry textarea {
  width: 100%; min-height: 8.5rem; resize: vertical;
  font: inherit; font-size: 1.08rem; line-height: 1.6; color: var(--ink);
  background: var(--paper-2); border: 1px solid transparent; border-radius: 3px;
  padding: 1rem 1.1rem;
  background-image: repeating-linear-gradient(transparent 0 calc(1.6em - 1px), var(--rule) calc(1.6em - 1px) 1.6em);
  background-position: 0 1rem; background-attachment: local;
}
.entry textarea:focus { outline: none; border-color: var(--or); }
.entry:target label { color: var(--or-ink); }

/* ---------- Bibliothèque ---------- */
.shelf { margin-top: 3.2rem; }
.shelf h2 { font-size: 1.7rem; margin-bottom: .4rem; }
.shelf > p { color: var(--ink-2); font-size: 1.05rem; }
.books { list-style: none; padding: 0 !important; margin: 1.2rem 0 0; }
.books li { padding: 1.1rem 0; border-bottom: 1px solid var(--rule); margin: 0 !important; }
.books .ti { font-style: italic; font-weight: 500; }
.books .au { font-family: var(--f-mono); font-size: .78rem; color: var(--machine); display: block; margin-bottom: .2rem; }
.books p { margin: .3rem 0 0; font-size: 1.02rem; color: var(--ink-2); }
.books a { font-family: var(--f-mono); font-size: .75rem; }

/* ---------- Mouvement réduit ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .stream .caret { display: none; }
}

@media (max-width: 560px) {
  body { font-size: 1.12rem; }
  .site-nav { gap: .2rem 1rem; font-size: .76rem; }
  .card { padding-left: 1.4rem; padding-right: .8rem; }
  .pager a { padding: 1.2rem 1rem; }
}

@media print {
  .site-head, .progress, .pager, .site-foot nav, .carnet-tools { display: none; }
  body { background: #fff; color: #000; }
}