/* ============================================================
   LaboScolaire_Informatique
   warm paper + hand-drawn ink · stacked headline · broken bento
   ============================================================ */

:root {
  --bg: #f8f2e2;
  --bg-2: #f2e9d4;
  --paper: #fdf9ee;
  --ink: #0a0a0a;
  --ink-soft: #3a352c;
  --ink-mute: #6b6355;
  --rule: #0a0a0a;
  --accent: #b3441d;
  --accent-soft: #e8d5c2;
  --grain-opacity: 0.055;
  --shadow: 6px 6px 0 rgba(10, 10, 10, 0.14);

  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --pad: clamp(1.15rem, 4vw, 2.5rem);
  --maxw: 74rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14120e;
    --bg-2: #1b1813;
    --paper: #1e1a15;
    --ink: #f4ecda;
    --ink-soft: #d8cfba;
    --ink-mute: #a89e8a;
    --rule: #f4ecda;
    --accent: #e8834f;
    --accent-soft: #3a2a1e;
    --grain-opacity: 0.09;
    --shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  }
}

html[data-theme="light"] {
  --bg: #f8f2e2;
  --bg-2: #f2e9d4;
  --paper: #fdf9ee;
  --ink: #0a0a0a;
  --ink-soft: #3a352c;
  --ink-mute: #6b6355;
  --rule: #0a0a0a;
  --accent: #b3441d;
  --accent-soft: #e8d5c2;
  --grain-opacity: 0.055;
  --shadow: 6px 6px 0 rgba(10, 10, 10, 0.14);
}

html[data-theme="dark"] {
  --bg: #14120e;
  --bg-2: #1b1813;
  --paper: #1e1a15;
  --ink: #f4ecda;
  --ink-soft: #d8cfba;
  --ink-mute: #a89e8a;
  --rule: #f4ecda;
  --accent: #e8834f;
  --accent-soft: #3a2a1e;
  --grain-opacity: 0.09;
  --shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: 1.62;
  font-variation-settings: "SOFT" 20, "WONK" 1;
  overflow-x: hidden;
}

img, video { max-width: 100%; height: auto; display: block; }

a { color: inherit; 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;
}

/* ---------- animated noise field ---------- */

.noise-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.grain {
  position: fixed;
  inset: -10%;
  z-index: 0;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'><animate attributeName='baseFrequency' dur='24s' values='0.72;0.86;0.72' repeatCount='indefinite'/></feTurbulence><feColorMatrix type='saturate' values='0'/></filter><rect width='240' height='240' filter='url(%23n)'/></svg>");
  background-size: 240px 240px;
  mix-blend-mode: multiply;
}
@media (prefers-color-scheme: dark) {
  .grain { mix-blend-mode: screen; }
}
html[data-theme="dark"] .grain { mix-blend-mode: screen; }
html[data-theme="light"] .grain { mix-blend-mode: multiply; }

/* ---------- header ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding: 0.85rem var(--pad);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 22%, transparent);
}

.mark {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}
.mark-underscore { color: var(--accent); }
.mark-dot {
  width: 9px; height: 9px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.1rem;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.site-nav a {
  text-decoration: none;
  padding: 0.55rem 0.15rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { border-bottom-color: var(--accent); }
.nav-cta {
  border: 1.5px solid var(--rule);
  padding: 0.5rem 0.8rem !important;
  border-radius: 2px;
}
.nav-cta:hover { background: var(--ink); color: var(--bg); border-bottom-color: var(--rule); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.4rem 0.6rem;
  background: transparent;
  color: var(--ink);
  border: 1px solid color-mix(in srgb, var(--rule) 40%, transparent);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  cursor: pointer;
}
.theme-toggle:hover { border-color: var(--rule); }
.theme-icon { font-size: 0.95rem; line-height: 1; }

/* ---------- shared layout ---------- */

main {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad) 4rem;
}

section { padding: clamp(2.6rem, 7vw, 5rem) 0; }

.section-title {
  font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.35rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1.1rem;
  font-variation-settings: "SOFT" 30, "WONK" 1;
  max-width: 22ch;
}

.section-intro {
  max-width: 52ch;
  color: var(--ink-soft);
  margin: 0 0 2rem;
}

/* ---------- hero ---------- */

.hero { padding-top: clamp(2.5rem, 8vw, 5.5rem); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  margin: 0 0 1.4rem;
}

.stacked {
  font-size: clamp(2.35rem, 1.2rem + 6.4vw, 5.4rem);
  line-height: 0.94;
  font-weight: 600;
  letter-spacing: -0.035em;
  margin: 0 0 1.8rem;
  font-variation-settings: "SOFT" 40, "WONK" 1;
}
.stacked span { display: block; }
.stacked span:nth-child(2) { margin-left: 1.6em; }
.stacked span:nth-child(3) {
  margin-left: -0.06em;
  position: relative;
  display: inline-block;
}
.stacked span:nth-child(3)::after {
  content: "";
  position: absolute;
  left: -0.04em;
  right: 0.1em;
  bottom: 0.02em;
  height: 0.16em;
  background: var(--accent);
  opacity: 0.85;
  clip-path: polygon(0 42%, 8% 20%, 22% 46%, 38% 18%, 55% 44%, 72% 22%, 88% 48%, 100% 26%, 100% 100%, 0 100%);
}

.lede {
  max-width: 58ch;
  font-size: clamp(1.02rem, 0.98rem + 0.35vw, 1.2rem);
  color: var(--ink-soft);
  margin: 0 0 2rem;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.35rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease;
}
.btn-ink {
  background: var(--ink);
  color: var(--bg);
  border: 1.5px solid var(--ink);
  box-shadow: var(--shadow);
}
.btn-ink:hover { color: var(--bg); transform: translate(-2px, -2px); box-shadow: 8px 8px 0 rgba(10,10,10,0.18); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--rule);
}
.btn-ghost:hover { background: var(--accent-soft); color: var(--ink); }

.hero-note {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  max-width: 46ch;
  margin: 0;
  line-height: 1.6;
}

/* ---------- broken bento ---------- */

.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: clamp(0.9rem, 2vw, 1.5rem);
  align-items: start;
}
.bento .section-title { grid-column: 1 / -1; margin-bottom: 0.4rem; }

.card {
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--rule) 30%, transparent);
  border-radius: 2px;
  padding: clamp(1.1rem, 2.4vw, 1.7rem);
  position: relative;
}
.card h3 {
  font-size: clamp(1.12rem, 1rem + 0.5vw, 1.35rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 0 0 0.6rem;
  line-height: 1.2;
}
.card p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }
.card-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin: 0 0 0.7rem !important;
  letter-spacing: 0.1em;
}

/* intentional misalignments */
.card-a { grid-column: 1 / 4; border-width: 2px 1px 1px 2px; }
.card-b { grid-column: 4 / 7; margin-top: 2.2rem; border-width: 1px 2px 2px 1px; }
.card-c { grid-column: 2 / 5; margin-top: -0.6rem; border-width: 2px 1px 2px 1px; }
.card-d { grid-column: 5 / 7; margin-top: 1.4rem; border-width: 1px 2px 1px 2px; }

.card-empty {
  grid-column: 1 / 2;
  min-height: 90px;
  background: transparent;
  border: 1px dashed color-mix(in srgb, var(--rule) 28%, transparent);
  display: grid;
  place-items: center;
}
.scribble {
  width: 60%;
  height: 2px;
  background: var(--ink-mute);
  opacity: 0.5;
  transform: rotate(-8deg);
}

/* ---------- expandable index ---------- */

.index-block { border-top: 1px solid color-mix(in srgb, var(--rule) 25%, transparent); }

.accordion { display: flex; flex-direction: column; }

.entry {
  border-bottom: 1px solid color-mix(in srgb, var(--rule) 25%, transparent);
}
.entry summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1.05rem 0.2rem;
  min-height: 56px;
  cursor: pointer;
  list-style: none;
}
.entry summary::-webkit-details-marker { display: none; }
.entry summary:hover .entry-title { color: var(--accent); }

.entry-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
  border: 1px solid color-mix(in srgb, var(--rule) 35%, transparent);
  width: 1.9rem;
  height: 1.9rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  flex: none;
}
.entry-title {
  font-size: clamp(1.05rem, 0.98rem + 0.5vw, 1.32rem);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  transition: color 140ms ease;
}
.entry-mark {
  width: 14px;
  height: 14px;
  position: relative;
  flex: none;
}
.entry-mark::before,
.entry-mark::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform 200ms ease, opacity 200ms ease;
}
.entry-mark::before { left: 0; right: 0; top: 6px; height: 1.5px; }
.entry-mark::after { top: 0; bottom: 0; left: 6px; width: 1.5px; }
.entry[open] .entry-mark::after { transform: scaleY(0); opacity: 0; }

.entry-body {
  padding: 0 0.2rem 1.6rem 3rem;
  max-width: 62ch;
  color: var(--ink-soft);
  animation: riseIn 320ms ease both;
}
.entry-body p { margin: 0 0 0.9rem; }
.entry-body ul {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
  font-size: 0.95rem;
}
.entry-body li::marker { color: var(--accent); }

/* ---------- notes / de la salle à la grille ---------- */

.notes { border-top: 1px solid color-mix(in srgb, var(--rule) 25%, transparent); }
.notes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.notes-text p { margin: 0 0 1rem; max-width: 56ch; color: var(--ink-soft); }
.notes-text p:first-child { color: var(--ink); }

.notes-side {
  background: var(--bg-2);
  border: 1px solid color-mix(in srgb, var(--rule) 28%, transparent);
  border-left: 3px solid var(--accent);
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
}
.side-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin: 0 0 0.9rem;
}
.strike-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
  font-size: 0.95rem;
}
.strike-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--ink-soft);
}
.strike-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---------- contact ---------- */

.contact { border-top: 1px solid color-mix(in srgb, var(--rule) 25%, transparent); }

.contact-form {
  display: grid;
  gap: 1.1rem;
  max-width: 40rem;
  margin-top: 0.5rem;
}
.field { display: grid; gap: 0.4rem; }
.field label {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
}
.field input,
.field textarea {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid color-mix(in srgb, var(--rule) 40%, transparent);
  border-radius: 2px;
  padding: 0.7rem 0.8rem;
  min-height: 48px;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  outline: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 1px;
}
.contact-form .btn { justify-self: start; }

.form-status {
  font-family: var(--mono);
  font-size: 0.78rem;
  margin: 0;
  color: var(--ink-soft);
}

.contact-alt {
  font-size: 0.92rem;
  color: var(--ink-mute);
  margin-top: 1.6rem;
}

/* ---------- footer ---------- */

.site-foot {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem var(--pad) 4rem;
  border-top: 1px solid color-mix(in srgb, var(--rule) 25%, transparent);
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.foot-mark {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}
.foot-line { margin: 0 0 0.3rem; }
.muted { color: var(--ink-mute); }

.attribution {
  position: static;
  margin: 1.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  opacity: 1;
}
.attribution a { color: var(--ink-mute); text-decoration: underline; }
.attribution a:hover { color: var(--accent); }

/* ---------- motion ---------- */

@keyframes riseIn {
  from { opacity: 0; translate: 0 20px; }
  to { opacity: 1; translate: 0 0; }
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .hero .eyebrow,
    .hero .lede,
    .hero-actions,
    .hero-note,
    .card,
    .notes-text p,
    .notes-side,
    .section-intro,
    .contact-form {
      animation: riseIn linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 38%;
    }
    .hero .eyebrow,
    .hero .lede,
    .hero-actions,
    .hero-note {
      animation-timeline: none;
      animation: riseIn 700ms ease both;
    }
    .hero .lede { animation-delay: 90ms; }
    .hero-actions { animation-delay: 170ms; }
    .hero-note { animation-delay: 240ms; }
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .grain { display: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .card-a, .card-b, .card-c, .card-d { grid-column: 1 / -1; margin-top: 0; }
  .card-empty { display: none; }
  .stacked span:nth-child(2) { margin-left: 0.9em; }
  .notes-grid { grid-template-columns: 1fr; }
}

@media (min-width: 861px) {
  .notes-grid { grid-template-columns: 1.35fr 1fr; align-items: start; }
}

@media (max-width: 560px) {
  .site-head { gap: 0.4rem 0.75rem; }
  .site-nav { order: 3; width: 100%; margin-left: 0; gap: 0.2rem 0.9rem; font-size: 0.68rem; }
  .theme-toggle { margin-left: auto; }
  .theme-label { display: none; }
  .entry-body { padding-left: 0.2rem; }
  .stacked span:nth-child(2) { margin-left: 0.5em; }
}