/* Feuille de style unique – aucune dépendance, polices du système. */
:root {
  --paper: #f6f8fb; --surface: #ffffff; --tint: #e9edf3; --ink: #0f1b2d; --muted: #4b5a73;
  --line: #d5dce7; --accent: #0b6b75; --flow: #e8890c; --code-bg: #0f1b2d; --code-ink: #e6edf7;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #0b1220; --surface: #121c2f; --tint: #18243b; --ink: #e7ecf5; --muted: #9aa8c0;
          --line: #26344d; --accent: #5cc7d1; --flow: #ffb44d; --code-bg: #070d18; --code-ink: #dce6f5; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.65; font-size: 1.05rem;
       font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
h1, h2 { line-height: 1.15; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 6vw, 3.2rem); margin: 1rem 0; }
h2 { font-size: 1.6rem; margin: 2.5rem 0 .75rem; }
.lead { font-size: 1.2rem; color: var(--muted); }
.note { color: var(--muted); font-size: .9rem; }

/* Structure : une seule colonne centrée */
.site-header, main, .site-footer { max-width: 46rem; margin-inline: auto; padding-inline: 1.25rem; }
.site-header { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: .5rem 1.5rem; padding-block: 1.25rem; border-bottom: 1px solid var(--line); max-width: none; padding-inline: max(1.25rem, calc((100% - 46rem) / 2 + 1.25rem)); }
.brand { font-weight: 700; font-size: 1.2rem; color: var(--ink); text-decoration: none; }
nav a { margin-left: 1.25rem; color: var(--ink); text-decoration: none; border-bottom: 2px solid transparent; }
nav a:first-child { margin-left: 0; }
nav a:hover, nav a[aria-current="page"] { border-color: var(--accent); }
main { padding-block: 2rem 3rem; }
.site-footer { color: var(--muted); font-size: .9rem; padding-block: 1.5rem 2.5rem; border-top: 1px solid var(--line); }
.site-footer p { margin: .25rem 0; }

/* Liste des projets */
.projects { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.projects li { border-bottom: 1px solid var(--line); }
.projects a { display: block; padding: 1.1rem 0; color: inherit; text-decoration: none; }
.projects strong { display: block; font-size: 1.3rem; letter-spacing: -.01em; }
.projects span { display: block; color: var(--muted); }
.projects small { color: var(--muted); }
.projects a:hover strong { color: var(--accent); text-decoration: underline; }

/* Page projet */
.back { color: var(--muted); font-size: .95rem; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 1rem; margin: 1.5rem 0 0; padding-top: 1rem; border-top: 1px solid var(--line); }
.facts dt { color: var(--muted); font-size: .85rem; }
.facts dd { margin: 0; font-weight: 600; }
.pager { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.pager a { max-width: 20rem; margin-left: 0; color: var(--accent); border: 0; }

/* Schéma simple : une suite d'étapes en HTML/CSS */
.flow { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; padding: 0; margin: 1.5rem 0 .5rem; }
.flow li { flex: 1 1 7rem; padding: .6rem .75rem; text-align: center; background: var(--surface); border: 1.5px solid var(--ink); border-radius: 6px; line-height: 1.3; }
.flow li.main { background: var(--ink); color: var(--paper); }
.flow li.main span { color: inherit; opacity: .8; }
.flow strong, .flow span { display: block; }
.flow span { color: var(--muted); font-size: .85rem; }
.flow li + li { position: relative; margin-left: 1.25rem; }
.flow li + li::before { content: "\2192"; position: absolute; left: -1.35rem; top: 50%; transform: translateY(-50%); color: var(--flow); font-weight: 700; font-size: 1.2rem; }
.flow-note { color: var(--muted); font-size: .92rem; }
@media (max-width: 560px) {
  .flow { flex-direction: column; gap: 1.25rem; }
  .flow li + li { margin-left: 0; }
  .flow li + li::before { content: "\2193"; left: 50%; top: -1.25rem; transform: translateX(-50%); }
}

.schema { margin: 1.5rem 0; }
.schema img { display: block; max-width: 100%; height: auto; background: #fff; border: 1px solid var(--line); border-radius: 4px; }
.schema figcaption { margin-top: .5rem; color: var(--muted); font-size: .9rem; }
h3 { font-size: 1.2rem; margin: 1.75rem 0 .5rem; }

/* Tableaux et code */
.table-wrap { overflow-x: auto; margin: 1rem 0; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { padding: .6rem .75rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
thead th { background: var(--tint); }
.code { margin: 1.25rem 0; position: relative; }
.code figcaption { color: var(--muted); font-size: .85rem; margin-bottom: .35rem; }
pre { margin: 0; padding: 1rem; overflow-x: auto; background: var(--code-bg); color: var(--code-ink); border-radius: 4px; font: .85rem/1.6 ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
:not(pre) > code { background: var(--tint); padding: .1em .35em; border-radius: 3px; font-size: .9em; }
.copy { position: absolute; right: .5rem; top: 1.7rem; padding: .2rem .6rem; font: inherit; font-size: .8rem; color: var(--code-ink); background: transparent; border: 1px solid #56657f; border-radius: 4px; cursor: pointer; }
.copy:hover { border-color: var(--code-ink); }

.contact { list-style: none; padding: 0; }
.contact li { padding: .75rem 0; border-bottom: 1px solid var(--line); }
.contact span { display: inline-block; min-width: 6rem; color: var(--muted); }

/* ===== Accueil ===== */
.container { max-width: 72rem; margin-inline: auto; padding-inline: 1.25rem; }
.muted { color: var(--muted); }
.draft { padding: .75rem 1rem; border-left: 4px solid var(--flow); background: var(--tint); }

.hero-wrap { color: #e7ecf5;
  background: radial-gradient(52rem 26rem at 88% -8%, rgba(255,153,0,.20), transparent 62%),
              linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
              linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px), #0b1424;
  background-size: auto, 44px 44px, 44px 44px, auto; }
.hero-wrap .site-header { border-bottom: 1px solid rgba(255,255,255,.12); padding-inline: max(1.25rem, calc((100% - 72rem) / 2 + 1.25rem)); }
.hero-wrap .brand { color: #fff; font-size: 1.4rem; letter-spacing: -.02em; }
.hero-wrap nav a { color: #e7ecf5; }
.hero-wrap nav a:hover { border-color: #ff9900; }
.hero-wrap :focus-visible { outline-color: #ff9900; }

.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 3rem; align-items: center; padding-block: clamp(3rem, 8vw, 6rem); }
.eyebrow { margin: 0 0 1.25rem; color: #5cc7d1; font: 600 .82rem/1 ui-monospace, "SF Mono", Menlo, Consolas, monospace; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { margin: 0 0 1.25rem; font-size: clamp(2.4rem, 6.5vw, 4.2rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.02; }
.hero h1 span { color: #ff9900; }
.hero .lead { max-width: 38rem; color: #b8c4d8; }
.cta { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.75rem 0; }
.btn { display: inline-block; padding: .75rem 1.4rem; border: 2px solid transparent; border-radius: 8px; font-weight: 600; text-decoration: none; }
.btn-primary { background: #ff9900; color: #0b1424; }
.btn-primary:hover { background: #ffb03b; }
.btn-ghost { color: #e7ecf5; border-color: rgba(255,255,255,.35); }
.btn-ghost:hover { border-color: #fff; }
.cert-pills { display: flex; flex-wrap: wrap; gap: .6rem; margin: 0; padding: 0; list-style: none; }
.cert-pills a { display: inline-flex; align-items: center; gap: .45rem; padding: .4rem .85rem; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; color: #e7ecf5; font-size: .9rem; text-decoration: none; }
.cert-pills a:hover { border-color: #ff9900; }
.cert-pills svg { flex: none; color: #ff9900; }

.terminal { overflow: hidden; background: #060d18; border: 1px solid rgba(255,255,255,.12); border-radius: 12px; box-shadow: 0 30px 60px -20px rgba(0,0,0,.6); }
.terminal-bar { display: flex; gap: .4rem; padding: .7rem .9rem; background: #0f1a2e; }
.terminal-bar i { width: .65rem; height: .65rem; border-radius: 50%; background: #2f4264; }
.terminal-bar i:first-child { background: #ff9900; }
.terminal pre { margin: 0; padding: 1.1rem 1.25rem; background: none; color: #dce6f5; font-size: .92rem; line-height: 1.9; }
.terminal .c { color: #7d8da6; }
.terminal .p { color: #5cc7d1; }
.cursor { display: inline-block; width: .55em; height: 1.05em; background: #ff9900; vertical-align: text-bottom; animation: blink 1.1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .cursor { animation: none; } }
@media (max-width: 860px) { .hero { grid-template-columns: 1fr; } .hero-visual { display: none; } }

main.home { max-width: none; padding: 0; }
.home h2 { margin: 0 0 .5rem; font-size: clamp(1.8rem, 4vw, 2.4rem); }
.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section-head { max-width: 48rem; margin-bottom: 2rem; }
.section-head p { margin: 0; color: var(--muted); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr)); gap: 1.5rem; margin: 0; padding: 0; list-style: none; }
.card { position: relative; display: flex; flex-direction: column; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; transition: transform .2s, box-shadow .2s, border-color .2s; }
.card:hover, .card:focus-within { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 18px 40px -22px rgba(15,27,45,.5); }
.card img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: contain; background: #fff; border-bottom: 1px solid var(--line); }
.card-body { display: flex; flex: 1; flex-direction: column; gap: .5rem; padding: 1.25rem 1.35rem 1.4rem; }
.card-kicker { margin: 0; color: var(--accent); font: 600 .78rem/1 ui-monospace, "SF Mono", Menlo, Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }
.card h3 { margin: 0; font-size: 1.2rem; line-height: 1.3; letter-spacing: -.01em; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a::after { content: ""; position: absolute; inset: 0; }
.card .desc { margin: 0; color: var(--muted); font-size: .97rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin: .35rem 0 0; padding: 0; list-style: none; }
.chips li { margin: 0; padding: .12rem .6rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font: .76rem ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.more { margin-top: auto; padding-top: .75rem; color: var(--accent); font-weight: 600; }
.more::after { content: "\2192"; display: inline-block; margin-left: .4rem; transition: transform .2s; }
.card:hover .more::after { transform: translateX(4px); }
@media (prefers-reduced-motion: reduce) { .card, .more::after { transition: none; } .card:hover, .card:focus-within { transform: none; } .card:hover .more::after { transform: none; } }

.band { background: var(--tint); }
.cert-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr)); gap: 1rem; margin: 1.5rem 0 0; padding: 0; list-style: none; }
.cert-card { display: flex; align-items: flex-start; gap: 1rem; padding: 1.25rem; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.cert-ico { flex: none; color: var(--flow); }
.cert-card strong, .cert-card span:not(.cert-ico), .cert-card a { display: block; }
.cert-card strong { line-height: 1.3; }
.cert-card span:not(.cert-ico) { color: var(--muted); font-size: .92rem; }
.cert-card a { margin-top: .4rem; font-size: .95rem; }

.split { display: grid; grid-template-columns: 1fr 1.6fr; gap: 1.5rem 3rem; align-items: start; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }
.cta-block { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; padding: clamp(2rem, 5vw, 3.25rem); color: #e7ecf5; background: #0b1424; border-radius: 16px; }
.cta-block h2 { margin: 0; color: #fff; }
.cta-block :focus-visible { outline-color: #ff9900; }
.site-footer.wide { max-width: 72rem; margin-top: 3rem; }

.hero .hero-sub { margin-top: 1rem; color: #93a3bd; font-size: 1rem; }
.home .table-wrap { max-width: none; }
.home .section > p a { font-weight: 600; }

.cta .btn { min-width: 6.5rem; text-align: center; }