/* ==========================================================
   BLOCKVERSE ACADEMY — thème néon / futuriste
   ========================================================== */
:root {
  --bg: #04050d;
  --bg-2: #0a0c1d;
  --panel: rgba(14, 18, 42, 0.62);
  --panel-solid: #0e122a;
  --line: rgba(0, 240, 255, 0.18);
  --line-strong: rgba(0, 240, 255, 0.45);
  --text: #e6ecff;
  --muted: #8a93b8;
  --cyan: #00f0ff;
  --magenta: #ff2bd6;
  --violet: #8b5cf6;
  --lime: #b6ff3b;
  --amber: #ffb547;
  --danger: #ff4d6d;
  --ok: #3dffa8;
  --lvl1: var(--cyan);
  --lvl2: var(--violet);
  --lvl3: var(--magenta);
  --radius: 14px;
  --font-title: "Orbitron", "Space Grotesk", system-ui, sans-serif;
  --font-body: "Space Grotesk", system-ui, -apple-system, Segoe UI, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --glow-cyan: 0 0 12px rgba(0, 240, 255, .55), 0 0 32px rgba(0, 240, 255, .25);
  --glow-magenta: 0 0 12px rgba(255, 43, 214, .55), 0 0 32px rgba(255, 43, 214, .25);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--magenta); color: #000; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-shadow: var(--glow-cyan); }
img, svg { max-width: 100%; }
code, pre, kbd { font-family: var(--font-mono); }
:not(pre) > code {
  background: rgba(0, 240, 255, .08);
  border: 1px solid var(--line);
  padding: .05em .4em;
  border-radius: 6px;
  font-size: .88em;
  color: var(--cyan);
}

/* ---------- Fond animé ---------- */
#bg-canvas {
  position: fixed; inset: 0;
  z-index: -2;
  width: 100%; height: 100%;
}
.bg-grid {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(139, 92, 246, .22), transparent 55%),
    radial-gradient(ellipse at 90% 30%, rgba(255, 43, 214, .14), transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(0, 240, 255, .14), transparent 55%),
    var(--bg);
}
.bg-grid::after {
  content: ""; position: absolute; left: -50%; right: -50%; bottom: -10%; height: 55%;
  background-image:
    linear-gradient(rgba(0, 240, 255, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, .16) 1px, transparent 1px);
  background-size: 60px 60px;
  transform: perspective(500px) rotateX(62deg);
  transform-origin: bottom;
  mask-image: linear-gradient(to top, #000 10%, transparent 90%);
  animation: grid-move 6s linear infinite;
}
@keyframes grid-move { to { background-position: 0 60px, 0 0; } }
.scanlines {
  position: fixed; inset: 0; z-index: 100; pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255,255,255,.018) 0 1px, transparent 1px 3px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(4, 5, 13, .72);
  border-bottom: 1px solid var(--line);
}
.site-header .inner {
  max-width: 1200px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-title); font-weight: 800; letter-spacing: .14em;
  font-size: 1rem; color: var(--text);
}
.logo:hover { text-shadow: none; }
.logo-mark {
  width: 30px; height: 30px; flex: none;
  filter: drop-shadow(0 0 6px var(--cyan));
}
.logo span b { color: var(--cyan); font-weight: 800; }
.nav { display: flex; gap: 6px; align-items: center; }
.nav a {
  font-family: var(--font-title); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--muted); padding: 8px 14px; border-radius: 8px; border: 1px solid transparent;
  transition: .2s;
}
.nav a:hover, .nav a.active { color: var(--cyan); border-color: var(--line); background: rgba(0,240,255,.05); text-shadow: none; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line); color: var(--cyan);
  border-radius: 8px; padding: 6px 10px; font-size: 1.1rem; cursor: pointer;
}
.progress-pill {
  font-family: var(--font-mono); font-size: .75rem; color: var(--lime);
  border: 1px solid rgba(182,255,59,.35); border-radius: 999px; padding: 4px 12px;
  white-space: nowrap;
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: rgba(4,5,13,.96); border-bottom: 1px solid var(--line); padding: 10px 16px 16px;
    display: none;
  }
  .nav.open { display: flex; }
  .progress-pill { align-self: flex-start; margin-top: 6px; }
}

/* ---------- Layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
section { position: relative; }
.section { padding: 90px 0; }
.section-title {
  font-family: var(--font-title); font-weight: 700; letter-spacing: .06em;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem); margin: 0 0 14px; line-height: 1.2;
}
.kicker {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .25em; text-transform: uppercase;
  color: var(--cyan); display: inline-flex; align-items: center; gap: 10px;
}
.kicker::before { content: ""; width: 28px; height: 1px; background: currentColor; box-shadow: var(--glow-cyan); }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 720px; }

/* ---------- Hero ---------- */
.hero { min-height: calc(100vh - 64px); display: flex; align-items: center; padding: 60px 0 80px; }
.hero h1 {
  font-family: var(--font-title); font-weight: 900;
  font-size: clamp(2.3rem, 7vw, 5.4rem); line-height: 1.02; margin: 18px 0 22px; letter-spacing: .02em;
}
.gradient-text {
  background: linear-gradient(92deg, var(--cyan), var(--violet) 45%, var(--magenta));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 22px rgba(139, 92, 246, .35));
}
.glitch { position: relative; display: inline-block; }
.glitch::before, .glitch::after {
  content: attr(data-text); position: absolute; inset: 0;
  background: inherit; -webkit-background-clip: text; background-clip: text;
}
.glitch::before { color: var(--cyan); opacity: .55; animation: glitch-a 3.2s infinite steps(1); }
.glitch::after { color: var(--magenta); opacity: .55; animation: glitch-b 2.7s infinite steps(1); }
@keyframes glitch-a {
  0%, 92%, 100% { transform: none; clip-path: inset(0 0 100% 0); }
  93% { transform: translate(-3px, 1px); clip-path: inset(20% 0 55% 0); }
  96% { transform: translate(3px, -1px); clip-path: inset(60% 0 10% 0); }
}
@keyframes glitch-b {
  0%, 88%, 100% { transform: none; clip-path: inset(0 0 100% 0); }
  89% { transform: translate(3px, 0); clip-path: inset(40% 0 35% 0); }
  94% { transform: translate(-2px, 1px); clip-path: inset(5% 0 75% 0); }
}
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: center; }
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; } .hero-visual { order: -1; max-width: 360px; margin: 0 auto; } }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-stats { display: flex; gap: 34px; margin-top: 46px; flex-wrap: wrap; }
.hero-stats div { font-family: var(--font-mono); color: var(--muted); font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; }
.hero-stats b { display: block; font-family: var(--font-title); font-size: 1.9rem; color: var(--text); letter-spacing: 0; }

.cube-wrap { perspective: 900px; display: grid; place-items: center; height: 380px; }
.cube {
  width: 170px; height: 170px; position: relative; transform-style: preserve-3d;
  animation: spin 18s linear infinite;
}
.cube .face {
  position: absolute; inset: 0; border: 1.5px solid var(--cyan);
  background: linear-gradient(135deg, rgba(0,240,255,.12), rgba(139,92,246,.08));
  box-shadow: inset 0 0 30px rgba(0,240,255,.25), var(--glow-cyan);
  display: grid; place-items: center; font-family: var(--font-mono); font-size: .62rem; color: var(--cyan);
  padding: 14px; text-align: center; word-break: break-all; line-height: 1.4;
}
.cube .f1 { transform: translateZ(85px); }
.cube .f2 { transform: rotateY(180deg) translateZ(85px); }
.cube .f3 { transform: rotateY(90deg) translateZ(85px); border-color: var(--magenta); color: var(--magenta); box-shadow: inset 0 0 30px rgba(255,43,214,.25), var(--glow-magenta); }
.cube .f4 { transform: rotateY(-90deg) translateZ(85px); border-color: var(--magenta); color: var(--magenta); box-shadow: inset 0 0 30px rgba(255,43,214,.25), var(--glow-magenta); }
.cube .f5 { transform: rotateX(90deg) translateZ(85px); border-color: var(--violet); }
.cube .f6 { transform: rotateX(-90deg) translateZ(85px); border-color: var(--violet); }
@keyframes spin { from { transform: rotateX(-22deg) rotateY(0); } to { transform: rotateX(-22deg) rotateY(360deg); } }
.orbit {
  position: absolute; width: 330px; height: 330px; border-radius: 50%;
  border: 1px dashed rgba(0,240,255,.25); animation: orbit 30s linear infinite;
}
.orbit::after {
  content: ""; position: absolute; top: -5px; left: 50%; width: 10px; height: 10px; border-radius: 50%;
  background: var(--magenta); box-shadow: var(--glow-magenta);
}
.orbit.o2 { width: 250px; height: 250px; animation-duration: 18s; animation-direction: reverse; border-color: rgba(255,43,214,.2); }
.orbit.o2::after { background: var(--cyan); box-shadow: var(--glow-cyan); }
@keyframes orbit { to { transform: rotate(360deg); } }

/* ---------- Boutons ---------- */
.btn {
  --c: var(--cyan);
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  font-family: var(--font-title); font-size: .78rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--c); background: transparent; border: 1px solid var(--c);
  padding: 13px 22px; border-radius: 10px; position: relative; overflow: hidden;
  transition: .25s; text-decoration: none;
}
.btn:hover { background: var(--c); color: #000; box-shadow: 0 0 22px var(--c); text-shadow: none; }
.btn.primary { background: var(--c); color: #000; box-shadow: 0 0 18px rgba(0,240,255,.4); }
.btn.primary:hover { box-shadow: 0 0 32px var(--c); }
.btn.magenta { --c: var(--magenta); }
.btn.lime { --c: var(--lime); }
.btn.small { padding: 8px 14px; font-size: .68rem; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- Cartes / panneaux ---------- */
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  position: relative;
}
.corners::before, .corners::after {
  content: ""; position: absolute; width: 16px; height: 16px; pointer-events: none;
  border: 2px solid var(--cyan); filter: drop-shadow(0 0 4px var(--cyan));
}
.corners::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; border-top-left-radius: var(--radius); }
.corners::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; border-bottom-right-radius: var(--radius); }

.levels { display: grid; gap: 70px; margin-top: 50px; }
.level-head { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; margin-bottom: 22px; }
.level-head h3 { font-family: var(--font-title); font-size: 1.4rem; margin: 0; letter-spacing: .05em; }
.level-tag {
  font-family: var(--font-mono); font-size: .72rem; letter-spacing: .2em; padding: 4px 10px; border-radius: 6px;
  border: 1px solid currentColor; text-transform: uppercase;
}
.lvl-1 { --lc: var(--lvl1); }
.lvl-2 { --lc: var(--lvl2); }
.lvl-3 { --lc: var(--lvl3); }
.level-tag, .module-card .num { color: var(--lc); }
.module-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 20px; }
.module-card {
  display: flex; flex-direction: column; gap: 10px; padding: 24px; color: var(--text);
  border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel);
  transition: transform .3s, border-color .3s, box-shadow .3s; position: relative; overflow: hidden;
}
.module-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: .3s;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--lc) 22%, transparent), transparent 60%);
}
.module-card:hover { transform: translateY(-5px); border-color: var(--lc); box-shadow: 0 10px 40px -10px var(--lc); text-shadow: none; }
.module-card:hover::before { opacity: 1; }
.module-card > * { position: relative; }
.module-card .num { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .2em; }
.module-card h4 { font-family: var(--font-title); font-size: 1.05rem; margin: 0; letter-spacing: .03em; line-height: 1.35; }
.module-card p { margin: 0; color: var(--muted); font-size: .94rem; line-height: 1.55; flex: 1; }
.module-card .meta { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: .72rem; color: var(--muted); }
.module-card .done-badge { color: var(--lime); display: none; }
.module-card.done .done-badge { display: inline; }
.module-card.done { border-color: rgba(182,255,59,.4); }

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; margin-top: 40px; }
.feature { padding: 26px; }
.feature .ico { font-size: 1.7rem; margin-bottom: 8px; filter: drop-shadow(0 0 8px var(--cyan)); }
.feature h4 { font-family: var(--font-title); font-size: .95rem; letter-spacing: .06em; margin: 0 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: .94rem; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Pages module ---------- */
.module-hero { padding: 70px 0 30px; }
.module-hero .breadcrumb { font-family: var(--font-mono); font-size: .78rem; color: var(--muted); letter-spacing: .1em; }
.module-hero h1 {
  font-family: var(--font-title); font-size: clamp(1.9rem, 5vw, 3.3rem); line-height: 1.1; margin: 16px 0 14px; letter-spacing: .02em;
}
.module-hero .meta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.chip {
  font-family: var(--font-mono); font-size: .74rem; padding: 5px 12px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
}
.chip.lvl { color: var(--lc); border-color: var(--lc); }
.article-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 50px; padding-bottom: 80px; }
@media (max-width: 960px) { .article-layout { grid-template-columns: minmax(0, 1fr); } .toc { display: none; } }
.toc { position: sticky; top: 90px; align-self: start; font-size: .86rem; }
.toc h5 { font-family: var(--font-mono); letter-spacing: .2em; font-size: .7rem; color: var(--muted); margin: 0 0 12px; text-transform: uppercase; }
.toc a { display: block; color: var(--muted); padding: 6px 0 6px 14px; border-left: 1px solid var(--line); transition: .2s; line-height: 1.4; }
.toc a:hover, .toc a.active { color: var(--cyan); border-left-color: var(--cyan); text-shadow: none; }

.article { max-width: 780px; min-width: 0; overflow-wrap: break-word; }
.article h2 {
  font-family: var(--font-title); font-size: 1.45rem; letter-spacing: .04em; margin: 60px 0 16px; line-height: 1.3;
  scroll-margin-top: 90px;
}
.article h2::before { content: "// "; color: var(--lc, var(--cyan)); }
.article h3 { font-family: var(--font-title); font-size: 1.05rem; letter-spacing: .04em; margin: 32px 0 8px; color: var(--cyan); }
.article p, .article li { color: #cfd6f3; }
.article strong { color: var(--text); }
.article ul, .article ol { padding-left: 1.3em; }
.article li { margin: 6px 0; }
.article li::marker { color: var(--cyan); }

.callout {
  border: 1px solid var(--line); border-left: 3px solid var(--cyan); background: rgba(0,240,255,.05);
  padding: 16px 20px; border-radius: 10px; margin: 26px 0;
}
.callout .t { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--cyan); display: block; margin-bottom: 4px; }
.callout p { margin: 0; }
.callout.warn { border-left-color: var(--amber); background: rgba(255,181,71,.06); }
.callout.warn .t { color: var(--amber); }
.callout.danger { border-left-color: var(--danger); background: rgba(255,77,109,.06); }
.callout.danger .t { color: var(--danger); }
.callout.analogy { border-left-color: var(--magenta); background: rgba(255,43,214,.05); }
.callout.analogy .t { color: var(--magenta); }

pre.code {
  background: #070914; border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px;
  overflow-x: auto; font-size: .84rem; line-height: 1.6; color: #c9d4ff; margin: 22px 0;
}
.code .k { color: var(--magenta); }
.code .t { color: var(--cyan); }
.code .s { color: var(--lime); }
.code .c { color: #5d6690; font-style: italic; }
.code .n { color: var(--amber); }

table.data { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: .92rem; }
.table-wrap { overflow-x: auto; }
table.data th, table.data td { border-bottom: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
table.data th { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); }
table.data td { color: #cfd6f3; }

.key-points { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 24px 0; }
.key-points .kp { padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.key-points .kp b { font-family: var(--font-title); font-size: .85rem; letter-spacing: .05em; display: block; color: var(--cyan); margin-bottom: 4px; }
.key-points .kp span { color: var(--muted); font-size: .92rem; line-height: 1.5; display: block; }

/* ---------- Démos ---------- */
.demo { margin: 34px 0; padding: 24px; }
.demo-title {
  font-family: var(--font-mono); font-size: .74rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--lime); display: flex; align-items: center; gap: 8px; margin-bottom: 14px;
}
.demo-title::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 10px var(--lime); animation: pulse 1.6s infinite; }
@keyframes pulse { 50% { opacity: .3; } }
.demo label { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; display: block; margin-bottom: 6px; }
.input, textarea.input, select.input {
  width: 100%; background: #060815; border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 11px 14px; font-family: var(--font-mono); font-size: .9rem; outline: none; transition: .2s;
}
.input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,240,255,.12); }
textarea.input { resize: vertical; min-height: 70px; }
.hash-out {
  font-family: var(--font-mono); font-size: .85rem; word-break: break-all; padding: 12px 14px; border-radius: 10px;
  background: #060815; border: 1px dashed var(--line-strong); color: var(--cyan); margin-top: 8px; min-height: 46px;
}
.hash-out .diff { color: var(--magenta); text-shadow: var(--glow-magenta); }
.demo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .demo-row { grid-template-columns: 1fr; } }
.demo-note { color: var(--muted); font-size: .88rem; margin-top: 12px; }
.stat { font-family: var(--font-mono); font-size: .85rem; color: var(--muted); }
.stat b { color: var(--text); }

/* chaîne de blocs */
.chain { display: flex; gap: 0; overflow-x: auto; padding: 8px 2px 16px; scroll-snap-type: x mandatory; }
.block {
  flex: 0 0 270px; scroll-snap-align: start; padding: 16px; border-radius: 12px; border: 1px solid var(--ok);
  background: rgba(61,255,168,.05); box-shadow: 0 0 18px -6px var(--ok); transition: .3s; position: relative;
}
.block.invalid { border-color: var(--danger); background: rgba(255,77,109,.07); box-shadow: 0 0 18px -6px var(--danger); }
.block .bh { display: flex; justify-content: space-between; font-family: var(--font-title); font-size: .8rem; letter-spacing: .1em; margin-bottom: 10px; }
.block .status { font-family: var(--font-mono); font-size: .68rem; color: var(--ok); }
.block.invalid .status { color: var(--danger); }
.block .f { margin-bottom: 8px; }
.block .f label { font-size: .62rem; margin-bottom: 3px; }
.block .f .input { padding: 7px 10px; font-size: .78rem; }
.block .hv { font-family: var(--font-mono); font-size: .68rem; word-break: break-all; color: var(--muted); line-height: 1.45; }
.block .hv.cur { color: var(--ok); }
.block.invalid .hv.cur { color: var(--danger); }
.link { flex: 0 0 34px; align-self: center; height: 2px; background: linear-gradient(90deg, var(--cyan), var(--magenta)); box-shadow: var(--glow-cyan); position: relative; }
.link::after { content: "▶"; position: absolute; right: -4px; top: -10px; font-size: .7rem; color: var(--magenta); }

/* barres */
.bars { display: grid; gap: 10px; margin-top: 14px; }
.bar-row { display: grid; grid-template-columns: 110px 1fr 70px; gap: 12px; align-items: center; font-family: var(--font-mono); font-size: .8rem; }
.bar-track { height: 14px; border-radius: 7px; background: #060815; border: 1px solid var(--line); overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--cyan), var(--violet)); box-shadow: var(--glow-cyan); transition: width .5s ease; }
.bar-fill.m { background: linear-gradient(90deg, var(--magenta), var(--violet)); box-shadow: var(--glow-magenta); }
.bar-fill.l { background: linear-gradient(90deg, var(--lime), var(--cyan)); }
input[type="range"] { width: 100%; accent-color: var(--cyan); }

/* contrat */
.contract-ui { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 720px) { .contract-ui { grid-template-columns: 1fr; } }
.log {
  font-family: var(--font-mono); font-size: .76rem; background: #060815; border: 1px solid var(--line);
  border-radius: 10px; padding: 12px; height: 220px; overflow-y: auto; color: var(--muted);
}
.log div { padding: 3px 0; border-bottom: 1px dashed rgba(0,240,255,.08); }
.log .ok { color: var(--ok); }
.log .err { color: var(--danger); }
.log .ev { color: var(--amber); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

/* stack des layers */
.stack { display: grid; gap: 10px; margin: 24px 0; }
.layer {
  display: grid; grid-template-columns: 70px 1fr; gap: 16px; align-items: center; padding: 16px 20px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--panel); cursor: pointer; transition: .25s;
  text-align: left; color: var(--text); font: inherit; width: 100%;
}
.layer .ln { font-family: var(--font-title); font-weight: 900; font-size: 1.5rem; color: var(--lc); text-shadow: 0 0 14px var(--lc); }
.layer .lt b { font-family: var(--font-title); font-size: .95rem; letter-spacing: .05em; }
.layer .lt span { display: block; color: var(--muted); font-size: .88rem; }
.layer:hover, .layer.active { border-color: var(--lc); box-shadow: 0 0 26px -8px var(--lc); transform: translateX(6px); }
.layer[data-l="3"] { --lc: var(--lime); }
.layer[data-l="2"] { --lc: var(--magenta); }
.layer[data-l="1"] { --lc: var(--violet); }
.layer[data-l="0"] { --lc: var(--cyan); }
.layer-detail { padding: 20px 22px; margin-top: 4px; min-height: 120px; }
.layer-detail h4 { font-family: var(--font-title); margin: 0 0 8px; letter-spacing: .05em; }

/* AMM */
.pool { display: flex; gap: 16px; align-items: center; justify-content: center; margin: 18px 0; flex-wrap: wrap; }
.tank { width: 130px; text-align: center; font-family: var(--font-mono); font-size: .78rem; }
.tank .vessel { height: 140px; border: 1px solid var(--line-strong); border-radius: 10px; position: relative; overflow: hidden; background: #060815; margin-bottom: 6px; }
.tank .liquid { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, var(--cyan), rgba(0,240,255,.25)); transition: height .6s ease; box-shadow: 0 0 20px var(--cyan); }
.tank.b .liquid { background: linear-gradient(to top, var(--magenta), rgba(255,43,214,.25)); box-shadow: 0 0 20px var(--magenta); }
.k-sign { font-family: var(--font-title); font-size: 1.4rem; color: var(--violet); }

/* ---------- Quiz ---------- */
.quiz { margin: 60px 0 20px; padding: 28px; }
.quiz h2 { margin-top: 0 !important; }
.q { padding: 18px 0; border-bottom: 1px dashed var(--line); }
.q:last-of-type { border-bottom: 0; }
.q > p { font-weight: 600; margin: 0 0 12px; color: var(--text); }
.q .opts { display: grid; gap: 8px; }
.q button.opt {
  text-align: left; font: inherit; font-size: .94rem; color: #cfd6f3; background: #070918;
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; cursor: pointer; transition: .2s;
}
.q button.opt:hover:not(:disabled) { border-color: var(--cyan); color: var(--text); }
.q button.opt.right { border-color: var(--ok); background: rgba(61,255,168,.08); color: var(--ok); }
.q button.opt.wrong { border-color: var(--danger); background: rgba(255,77,109,.08); color: var(--danger); }
.q button.opt:disabled { cursor: default; }
.q .explain { display: none; margin: 10px 0 0; font-size: .92rem; color: var(--muted); }
.q.answered .explain { display: block; }
.quiz-score { font-family: var(--font-mono); color: var(--lime); margin-top: 14px; }

/* ---------- Nav entre modules ---------- */
.module-footer { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; margin-top: 50px; }
@media (max-width: 720px) { .module-footer { grid-template-columns: 1fr; } }
.mf-link { padding: 16px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); transition: .2s; }
.mf-link:hover { border-color: var(--cyan); text-shadow: none; }
.mf-link small { display: block; font-family: var(--font-mono); font-size: .7rem; letter-spacing: .18em; color: var(--muted); text-transform: uppercase; }
.mf-link.next { text-align: right; }
.mf-link.empty { visibility: hidden; }

/* ---------- Lexique ---------- */
.glossary { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin-top: 30px; }
.term { padding: 20px; }
.term dt { font-family: var(--font-title); font-size: .95rem; letter-spacing: .05em; color: var(--cyan); margin-bottom: 6px; }
.term dd { margin: 0; color: #cfd6f3; font-size: .94rem; line-height: 1.6; }
.term .tag { font-family: var(--font-mono); font-size: .65rem; color: var(--muted); letter-spacing: .14em; float: right; }
.letters { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.letters button {
  font-family: var(--font-mono); background: transparent; border: 1px solid var(--line); color: var(--muted);
  border-radius: 6px; width: 34px; height: 34px; cursor: pointer;
}
.letters button.on, .letters button:hover { color: #000; background: var(--cyan); border-color: var(--cyan); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; margin-top: 40px; background: rgba(4,5,13,.8); }
.site-footer .inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; color: var(--muted); font-size: .86rem; }
.site-footer .disclaimer { max-width: 620px; }

.done-btn-wrap { text-align: center; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 60px 0; }
  .container { padding: 0 16px; }
  .key-points { grid-template-columns: 1fr; }
  .demo, .quiz { padding: 18px 14px; }
  .bar-row { grid-template-columns: 90px 1fr 64px; gap: 8px; font-size: .72rem; }
  .article h2 { font-size: 1.2rem; }
}

/* NFT */
.nft-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 12px; margin: 16px 0; }
.nft-card {
  background: #060815; border: 1px solid var(--line); border-radius: 12px; padding: 8px; cursor: pointer;
  color: var(--muted); font-family: var(--font-mono); font-size: .7rem; display: grid; gap: 6px; transition: .2s;
}
.nft-card svg { width: 100%; aspect-ratio: 1; border-radius: 8px; display: block; }
.nft-card:hover, .nft-card.on { border-color: var(--cyan); box-shadow: 0 0 18px -6px var(--cyan); color: var(--text); }
.nft-broken {
  aspect-ratio: 1; display: grid; place-content: center; text-align: center; border-radius: 8px;
  border: 1px dashed var(--danger); color: var(--danger); font-family: var(--font-title); font-size: 1.3rem; line-height: 1.2;
}
.nft-broken small { font-family: var(--font-mono); font-size: .58rem; }
pre.meta-out { white-space: pre-wrap; word-break: break-word; margin: 0; min-height: 180px; font-size: .74rem; }