/* smallbard.com — feuille de style
   Palette « atelier » : papier gris-bleu, encre marine, cobalt pour l'action. */

/* Polices auto-hébergées (Google Fonts, licence SIL OFL) */
@font-face {
  font-family: 'Bricolage Grotesque';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url(/static/fonts/bricolage-grotesque-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Bricolage Grotesque';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url(/static/fonts/bricolage-grotesque-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/static/fonts/ibm-plex-sans-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/static/fonts/ibm-plex-sans-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/static/fonts/jetbrains-mono-latin-ext.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400 500;
  font-display: swap;
  src: url(/static/fonts/jetbrains-mono-latin.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --paper: #f3f5f7;
  --paper-2: #e8ecf0;
  --ink: #0f1b2d;
  --ink-2: #3b4a5e;
  --ink-3: #6b7a8f;
  --line: #cfd6de;
  --cobalt: #1f4fe0;
  --cobalt-dark: #163bb0;
  --cobalt-soft: #dbe3fb;
  --signal: #ffb703;
  --dark: #0f1b2d;
  --dark-2: #172538;
  --on-dark: #e6ebf2;
  --on-dark-2: #9fb0c5;

  --display: "Bricolage Grotesque", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", Roboto, system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;

  --max: 1120px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 0.6em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.2rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.25rem; font-weight: 700; }
h3 small { font-family: var(--body); font-weight: 400; color: var(--ink-3); font-size: 0.85rem; }
p { margin: 0 0 1em; }
a { color: var(--cobalt); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { color: var(--cobalt-dark); }
strong { font-weight: 500; color: var(--ink); }
.mono { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.01em; }
.plain { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.plain li { margin: 0 0 0.6rem; }

:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: 0.5rem 1rem; z-index: 10; }
.skip:focus { left: 1rem; }

/* ---- Header ---- */
.top {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.brand-mark {
  display: inline-grid; place-items: center;
  width: 1.9rem; height: 1.9rem;
  background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: 0.75rem; font-weight: 500;
  border-radius: 4px;
}
.top nav { display: flex; gap: 1.4rem; align-items: center; flex-wrap: wrap; }
.top nav a { color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.top nav a:hover { color: var(--ink); }
.nav-cta { padding: 0.45rem 0.9rem; border: 1.5px solid var(--ink); border-radius: 4px; color: var(--ink) !important; }
.nav-cta:hover { background: var(--ink); color: var(--paper) !important; }

/* ---- Boutons ---- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.4rem;
  border-radius: 4px;
  font-weight: 500;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  font-family: var(--body);
  font-size: 1rem;
  transition: transform 0.12s ease, background-color 0.12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--cobalt); color: #fff; }
.btn-primary:hover { background: var(--cobalt-dark); color: #fff; }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.cta-row { display: flex; gap: 0.8rem; flex-wrap: wrap; margin: 1.6rem 0 0; }

/* ---- Hero ---- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) var(--gutter) clamp(2rem, 5vw, 4rem);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--cobalt);
  margin-bottom: 1.2rem;
}
.lede { font-size: 1.2rem; color: var(--ink-2); max-width: 58ch; }

/* ---- Signature : grille de contraintes ---- */
.solver { margin: 0; }
.solver-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  aspect-ratio: 1;
  max-width: 420px;
  margin: 0 auto;
  padding: 6px;
  background: var(--ink);
  border-radius: 8px;
}
.cell {
  position: relative;
  background: var(--paper);
  border-radius: 4px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  place-items: center;
  font-family: var(--mono);
  transition: background-color 0.35s ease;
}
.cell .cand { font-size: clamp(0.6rem, 1.4vw, 0.85rem); color: var(--ink-3); transition: opacity 0.35s ease, color 0.35s ease; }
.cell .cand.off { opacity: 0.12; }
.cell .val {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.6rem, 4.5vw, 2.6rem);
  color: var(--ink);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(.2,.9,.3,1.2);
}
.cell.fixed .val { opacity: 1; transform: none; }
.cell.fixed .cand { opacity: 0; }
.cell.given { background: var(--cobalt-soft); }
.cell.given .val { color: var(--cobalt-dark); }
.cell.active { background: #fff3c4; }
.solver figcaption { font-size: 0.85rem; color: var(--ink-3); max-width: 420px; margin: 0.9rem auto 0; }
.solver figcaption .mono { display: block; color: var(--cobalt); margin-bottom: 0.25rem; }

/* ---- Sections ---- */
.band { max-width: var(--max); margin: 0 auto; padding: clamp(2.5rem, 6vw, 5rem) var(--gutter); border-top: 1px solid var(--line); }
.section-head { margin-bottom: 2.2rem; }
.section-head p { color: var(--ink-2); }

.offer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
.offer { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 1.6rem; }
.offer h3 { margin-bottom: 0.5rem; }
.offer p { margin: 0 0 0.9rem; color: var(--ink-2); font-size: 0.98rem; }
.offer p:last-child { margin-bottom: 0; }

/* Timeline : l'année est le repère */
.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--line);
}
.timeline li:first-child { border-top: none; }
.when { color: var(--ink-3); font-size: 0.85rem; line-height: 1.4; padding-top: 0.35rem; }
.timeline h3 { margin-bottom: 0.3rem; }
.timeline p { margin: 0 0 0.6rem; color: var(--ink-2); }
.tech { color: var(--ink-3); }

.band-dark {
  max-width: none;
  background: var(--dark);
  color: var(--on-dark);
  border-top: none;
}
.band-dark > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.band-dark .section-head p { color: var(--on-dark-2); }
.research-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.2rem; }
.research-grid article { display: flex; flex-direction: column; background: var(--dark-2); border-radius: 8px; padding: 1.6rem; border: 1px solid #22334a; }
.research-grid h3 { color: #fff; }
.research-grid p { color: var(--on-dark-2); font-size: 0.98rem; }
.research-grid .tech { color: var(--signal); margin: auto 0 0; padding-top: 1rem; }

.two-col { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3rem; }
.sub { font-size: 0.8rem; font-family: var(--mono); font-weight: 500; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-3); margin: 1.6rem 0 0.8rem; }
.sub:first-child { margin-top: 0; }
.plain .when { display: inline-block; min-width: 6rem; }
.parcours li { display: grid; grid-template-columns: 6rem 1fr; gap: 0.6rem; margin-bottom: 0.9rem; color: var(--ink-2); }
.parcours .when { min-width: 0; }
.stack { display: grid; grid-template-columns: 6rem 1fr; gap: 0.5rem 1rem; margin: 0; }
.stack dt { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-3); padding-top: 0.2rem; }
.stack dd { margin: 0; color: var(--ink-2); }

.closing { text-align: center; }
.closing h2 { max-width: 24ch; margin-left: auto; margin-right: auto; }
.closing p { color: var(--ink-2); margin-bottom: 1.6rem; }

/* ---- Contact ---- */
.contact { max-width: var(--max); margin: 0 auto; padding: clamp(2rem, 6vw, 5rem) var(--gutter); display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(2rem, 5vw, 4rem); }
.contact-alt .when { min-width: 5rem; display: inline-block; }
.contact-form { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: clamp(1.4rem, 3vw, 2.2rem); }
.field { margin-bottom: 1.2rem; }
.field label { display: block; font-weight: 500; margin-bottom: 0.35rem; }
.hint { color: var(--ink-3); font-weight: 400; font-size: 0.85rem; }
.field input, .field textarea {
  width: 100%;
  font: inherit;
  padding: 0.7rem 0.8rem;
  border: 1.5px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
}
.field input:focus, .field textarea:focus { border-color: var(--cobalt); background: #fff; outline: none; box-shadow: 0 0 0 3px var(--cobalt-soft); }
.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.contact-form .hint { margin: 1rem 0 0; }
.notice { border-radius: 8px; padding: 1.2rem 1.4rem; }
.notice-ok { background: #e3f6e8; border: 1px solid #a6dfb5; color: #16401f; align-self: start; }
.notice-ok h2 { margin-bottom: 0.4rem; }
.notice-err { background: #fde8e8; border: 1px solid #f2b3b3; color: #6a1414; margin-bottom: 1.2rem; }

.legal { max-width: 70ch; margin: 0 auto; padding: clamp(2rem, 6vw, 4rem) var(--gutter); }
.legal h2 { font-size: 1.3rem; margin-top: 1.6rem; }

/* ---- Footer ---- */
.foot { border-top: 1px solid var(--line); background: var(--paper-2); }
.foot-grid { max-width: var(--max); margin: 0 auto; padding: 2.5rem var(--gutter) 2rem; display: grid; grid-template-columns: 2fr 1.5fr 1fr; gap: 2rem; font-size: 0.95rem; color: var(--ink-2); }
.foot-name { font-family: var(--display); font-weight: 700; font-size: 1.1rem; color: var(--ink); margin-bottom: 0.3rem; }
.foot-links { list-style: none; margin: 0; padding: 0; }
.foot-links li { margin-bottom: 0.4rem; }
.foot-note { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter) 2rem; font-size: 0.8rem; color: var(--ink-3); }

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .hero-grid, .contact, .two-col { grid-template-columns: 1fr; }
  .offer-grid, .research-grid, .foot-grid { grid-template-columns: 1fr; }
  .solver-grid { max-width: 300px; }
  .timeline li { grid-template-columns: 4.5rem 1fr; gap: 1rem; }
  }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cell, .cell .cand, .cell .val, .btn { transition: none; }
}