/* alexandre-pinoteau.fr — hand-written, no framework, no web fonts, no build step. */

:root {
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  --measure: 68ch;
  --wrap: 1180px;
  --radius: 4px;

  /* dark (default) */
  --bg: #0b0d10;
  --bg-2: #11151a;
  --panel: #141920;
  --line: #242c36;
  --line-soft: #1a2029;
  --ink: #e8e4da;
  --ink-2: #a9adb3;
  --ink-3: #7c828a;
  --accent: #f2a93b;        /* signal amber */
  --accent-ink: #1a1206;
  --ok: #5fd08a;            /* corroborated */
  --lead: #8fb4ff;          /* unverified lead */
  --muted-node: #4a525c;    /* defused */
  --grid: rgba(232, 228, 218, 0.035);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f4f1ea;
  --bg-2: #ece8de;
  --panel: #faf8f3;
  --line: #d6d0c3;
  --line-soft: #e3ded3;
  --ink: #16181d;
  --ink-2: #454a52;
  --ink-3: #5f646c;
  --accent: #a4520a;
  --accent-ink: #fff8ee;
  --ok: #17753b;
  --lead: #2f5bb8;
  --muted-node: #a9a39a;
  --grid: rgba(22, 24, 29, 0.045);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f4f1ea;
    --bg-2: #ece8de;
    --panel: #faf8f3;
    --line: #d6d0c3;
    --line-soft: #e3ded3;
    --ink: #16181d;
    --ink-2: #454a52;
    --ink-3: #5f646c;
    --accent: #a4520a;
    --accent-ink: #fff8ee;
    --ok: #17753b;
    --lead: #2f5bb8;
    --muted-node: #a9a39a;
    --grid: rgba(22, 24, 29, 0.045);
    color-scheme: light;
  }
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--sans);
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute; left: 1rem; top: -3rem; z-index: 10;
  background: var(--accent); color: var(--accent-ink); padding: .5rem .8rem;
  font: 600 .9rem var(--mono); text-decoration: none; border-radius: var(--radius);
}
.skip:focus { top: 1rem; }

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }

.mono { font-family: var(--mono); }
.tag {
  font: 500 .72rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-3);
}

/* ——— header ——— */
.top {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.top .wrap { display: flex; align-items: center; gap: 1.5rem; height: 3.5rem; }
.brand { font: 600 .9rem var(--mono); text-decoration: none; letter-spacing: .02em; display: inline-flex; align-items: center; gap: .55rem; }
.brand svg { width: 18px; height: 18px; }
.nav { display: flex; gap: 1.25rem; margin-left: auto; font: 500 .82rem var(--mono); }
.nav a { text-decoration: none; color: var(--ink-2); }
.nav a:hover { color: var(--accent); }
.theme-btn {
  appearance: none; background: none; border: 1px solid var(--line); color: var(--ink-2);
  font: 500 .75rem var(--mono); padding: .35rem .6rem; border-radius: var(--radius); cursor: pointer;
}
.theme-btn:hover { color: var(--accent); border-color: var(--accent); }
@media (max-width: 720px) { .nav { display: none; } .theme-btn { margin-left: auto; } }

/* ——— hero ——— */
.hero { padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } }

.kicker { display: flex; align-items: center; gap: .6rem; margin: 0 0 1.4rem; }
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 20%, transparent); }

h1 {
  font: 500 clamp(2.4rem, 5.6vw, 4.3rem)/1.04 var(--serif);
  letter-spacing: -.015em; margin: 0 0 1.4rem;
}
h1 em { font-style: italic; color: var(--accent); }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--ink-2); max-width: 36rem; margin: 0 0 2rem; }
.lede strong { color: var(--ink); font-weight: 600; }

.cta { display: flex; flex-wrap: wrap; gap: .75rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem; text-decoration: none;
  font: 600 .85rem var(--mono); padding: .7rem 1rem; border-radius: var(--radius);
  border: 1px solid var(--line); color: var(--ink); background: var(--panel);
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.08); color: var(--accent-ink); }

/* evidence graph */
.board {
  position: relative; margin: 0;
  border: 1px solid var(--line); border-radius: 6px; background: var(--panel);
  box-shadow: 0 30px 60px -30px rgba(0,0,0,.45);
}
.board-head, .board-foot {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: .6rem .9rem; font: 500 .7rem/1.3 var(--mono); color: var(--ink-3);
}
.board-head { border-bottom: 1px solid var(--line-soft); }
.board-foot { border-top: 1px solid var(--line-soft); flex-wrap: wrap; justify-content: flex-start; gap: .4rem 1.1rem; }
.board svg { display: block; width: 100%; height: auto; }
.lg { display: inline-flex; align-items: center; gap: .4rem; }
.lg i { display: inline-block; width: 18px; height: 0; border-top: 2px solid; }
.lg .f { border-color: var(--ok); }
.lg .l { border-color: var(--lead); border-top-style: dashed; }
.lg .d { border-color: var(--muted-node); }
.lg .x { border-color: #d0564b; border-top-style: dotted; }

.g-edge { stroke: var(--line); stroke-width: 1.4; fill: none; }
.g-edge.ok { stroke: var(--ok); }
.g-edge.lead { stroke: var(--lead); stroke-dasharray: 5 5; }
.g-edge.def { stroke: var(--muted-node); stroke-dasharray: 2 4; }
.g-node circle, .g-node rect { stroke-width: 1.6; }
.g-node.seed rect { fill: var(--accent); stroke: var(--accent); }
.g-node.seed text { fill: var(--accent-ink); font-weight: 700; }
.g-node.ok circle { fill: var(--panel); stroke: var(--ok); }
.g-node.lead circle { fill: var(--panel); stroke: var(--lead); stroke-dasharray: 3 3; }
.g-node.def circle { fill: var(--panel); stroke: var(--muted-node); }
.g-node text { font: 500 10.5px var(--mono); fill: var(--ink-2); }
.g-node .sub { font-size: 9px; fill: var(--ink-3); }
.g-node.def text { fill: var(--ink-3); text-decoration: line-through; }
.g-badge { font: 600 8.5px var(--mono); letter-spacing: .06em; }
.g-badge.ok { fill: var(--ok); }
.g-badge.lead { fill: var(--lead); }
.g-badge.def { fill: var(--ink-3); }

@media (prefers-reduced-motion: no-preference) {
  .anim .g-edge { stroke-dashoffset: 0; animation: fadein .5s both; }
  .anim .g-node, .anim .g-edge, .anim .g-badge { animation: pop .55s cubic-bezier(.2,.8,.2,1) both; }
  .anim [data-step="1"] { animation-delay: .25s; }
  .anim [data-step="2"] { animation-delay: .75s; }
  .anim [data-step="3"] { animation-delay: 1.25s; }
  .anim [data-step="4"] { animation-delay: 1.75s; }
  .anim [data-step="5"] { animation-delay: 2.25s; }
  .anim [data-step="6"] { animation-delay: 2.75s; }
  .anim .pulse { transform-box: fill-box; transform-origin: center; animation: pulse 2.6s ease-in-out 3.2s infinite; }
}
@keyframes pop { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* ——— stats strip ——— */
.strip { border-block: 1px solid var(--line); background: var(--bg-2); }
.strip ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); }
.strip li { padding: 1.3rem 1.1rem; border-left: 1px solid var(--line); }
.strip li:first-child { border-left: 0; }
.strip b { display: block; font: 500 clamp(1.6rem, 3vw, 2.2rem)/1.1 var(--serif); color: var(--ink); }
.strip span { display: block; margin-top: .35rem; font: 500 .74rem/1.4 var(--mono); color: var(--ink-3); }
@media (max-width: 900px) {
  .strip ul { grid-template-columns: repeat(2, 1fr); }
  .strip li { border-left: 0; border-top: 1px solid var(--line); }
  .strip li:nth-child(-n+2) { border-top: 0; }
  .strip li:nth-child(even) { border-left: 1px solid var(--line); }
  .strip li:last-child { grid-column: 1 / -1; border-left: 0; }
}

/* ——— sections ——— */
section.block { padding: clamp(3.5rem, 8vw, 6rem) 0 0; }
.sec-head { display: grid; grid-template-columns: 5rem 1fr; gap: 1rem; align-items: baseline; margin-bottom: 2.2rem; }
.sec-head .num { font: 500 .8rem var(--mono); color: var(--accent); }
h2 { font: 500 clamp(1.7rem, 3.4vw, 2.5rem)/1.12 var(--serif); margin: 0; letter-spacing: -.01em; }
.sec-head p { grid-column: 2; margin: .7rem 0 0; color: var(--ink-2); max-width: var(--measure); }
@media (max-width: 640px) { .sec-head { grid-template-columns: 1fr; } .sec-head p { grid-column: 1; } }

.thesis { display: grid; grid-template-columns: 5rem minmax(0, 1fr); gap: 1rem; }
.thesis > div { max-width: var(--measure); }
.thesis blockquote {
  margin: 0 0 1.6rem; padding: 0; font: 400 clamp(1.35rem, 2.6vw, 1.85rem)/1.35 var(--serif); color: var(--ink);
}
.thesis blockquote em { color: var(--accent); }
.thesis p { color: var(--ink-2); margin: 0 0 1rem; }
@media (max-width: 640px) { .thesis { grid-template-columns: 1fr; } .thesis > span { display: none; } }

/* project cards */
.work { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.card { background: var(--panel); padding: 1.6rem 1.5rem 1.4rem; display: flex; flex-direction: column; gap: .85rem; grid-column: span 2; }
.card.wide { grid-column: span 3; }
.card.feature { grid-column: span 6; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 2rem; padding: 2rem; }
@media (max-width: 1000px) {
  .card, .card.wide { grid-column: span 3; }
  .card.feature { grid-template-columns: 1fr; }
}
@media (max-width: 640px) { .card, .card.wide, .card.feature { grid-column: span 6; } }

.card h3 { font: 500 1.45rem/1.2 var(--serif); margin: 0; }
.card.feature h3 { font-size: clamp(1.7rem, 3vw, 2.2rem); }
.card p { margin: 0; color: var(--ink-2); font-size: .98rem; }
.card .meta { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip { font: 500 .68rem/1 var(--mono); padding: .35rem .5rem; border: 1px solid var(--line); border-radius: 3px; color: var(--ink-3); }
.chip.live { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.links { display: flex; flex-wrap: wrap; gap: .4rem 1.1rem; margin-top: auto; padding-top: .4rem; font: 600 .8rem var(--mono); }
.links a { text-decoration: none; color: var(--ink); }
.links a::after { content: " ↗"; color: var(--accent); }
.links a:hover { color: var(--accent); }

.facts { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; border-top: 1px solid var(--line-soft); }
.facts li { display: grid; grid-template-columns: 7.5rem 1fr; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid var(--line-soft); font-size: .93rem; color: var(--ink-2); }
.facts b { font: 500 1.3rem/1.2 var(--serif); color: var(--ink); }
.facts small { display: block; font: 500 .68rem var(--mono); color: var(--ink-3); margin-top: .15rem; }

/* principles */
.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.principles div { background: var(--panel); padding: 1.5rem; }
.principles h3 { font: 600 .95rem/1.3 var(--mono); margin: 0 0 .5rem; color: var(--ink); }
.principles h3 span { color: var(--accent); margin-right: .5rem; }
.principles p { margin: 0; color: var(--ink-2); font-size: .96rem; }
@media (max-width: 720px) { .principles { grid-template-columns: 1fr; } }

.toolbox { margin-top: 1.6rem; display: flex; flex-wrap: wrap; gap: .45rem; }

/* log */
.log { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); margin-left: .35rem; }
.log li { position: relative; padding: 0 0 1.5rem 1.6rem; max-width: 60rem; }
.log li::before { content: ""; position: absolute; left: -5px; top: .45rem; width: 9px; height: 9px; border-radius: 50%; background: var(--bg); border: 2px solid var(--accent); }
.log time { font: 500 .75rem var(--mono); color: var(--ink-3); display: block; }
.log h3 { font: 600 1rem/1.4 var(--sans); margin: .15rem 0 .2rem; }
.log h3 a { text-decoration: none; }
.log h3 a:hover { text-decoration: underline; }
.log p { margin: 0; color: var(--ink-2); font-size: .95rem; }

/* archive */
.archive { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 2rem; margin: 0; padding: 0; list-style: none; }
.archive li { padding: .75rem 0; border-bottom: 1px solid var(--line-soft); font-size: .92rem; color: var(--ink-2); }
.archive a { font: 600 .82rem var(--mono); color: var(--ink); text-decoration: none; display: block; }
.archive a:hover { color: var(--accent); }
@media (max-width: 900px) { .archive { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .archive { grid-template-columns: 1fr; } }

/* contact / footer */
.contact { padding: clamp(4rem, 9vw, 7rem) 0 3rem; }
.contact h2 { max-width: 20ch; }
.contact .cta { margin-top: 1.8rem; }
footer { border-top: 1px solid var(--line); padding: 1.4rem 0 2rem; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 2rem; font: 500 .72rem/1.5 var(--mono); color: var(--ink-3); }

@media print {
  body { background: #fff; color: #000; }
  .top, .theme-btn, .board, .skip { display: none !important; }
  .card, .principles div { break-inside: avoid; }
}