/* Altboot — feuille de style unique, mobile-first, sans dépendance externe */

:root {
  /* Palette « Sauge clair » (vert-de-gris, thème clair) */
  --ink: #e9ece7;
  --ink-2: #f0f3ee;
  --surface: #f4f6f2;
  --surface-2: #ffffff;
  --border: #cdd6cc;
  --text: #1f2a25;
  --muted: #5d6b62;
  --accent: #2f6f5b;
  --accent-hover: #245546;
  --accent-soft: rgba(47, 111, 91, 0.12);
  --accent-ink: #ffffff;
  --header-bg: rgba(244, 246, 242, 0.85);
  --ok: #2e7d4f;
  --alert-ok-text: #1d5536;
  --alert-err-text: #8c2a20;

  /* Voile sombre du hero : fixe (texte clair lisible sur la photo) */
  --hero-scrim-1: rgba(11, 16, 13, 0.92);
  --hero-scrim-2: rgba(11, 16, 13, 0.80);
  --hero-scrim-3: rgba(11, 16, 13, 0.55);
  --hero-glow: rgba(84, 179, 154, 0.22);
  --hero-text: #eef2ef;
  --hero-muted: #c2cdc6;
  --hero-accent: #9ad3bd;

  --maxw: 1120px;
  --radius: 14px;
  --radius-sm: 9px;
  --gap: clamp(1rem, 3vw, 2rem);
  --section-y: clamp(3.5rem, 8vw, 6.5rem);

  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scrollbar-gutter: stable; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }

h1, h2, h3 { line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.015em; }
h1 { font-size: clamp(2.1rem, 1.4rem + 3.4vw, 3.7rem); font-weight: 800; }
h2 { font-size: clamp(1.55rem, 1.2rem + 1.7vw, 2.35rem); font-weight: 750; }
h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem); font-weight: 700; }
p { margin: 0 0 1rem; }

.wrap { width: min(100% - 2.2rem, var(--maxw)); margin-inline: auto; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 0 0 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5ch;
}
.eyebrow::before { content: "~/"; color: var(--muted); }

.lead { color: var(--muted); font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem); max-width: 60ch; }

/* Accessibilité : focus visible homogène */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 0.6rem;
  top: -3rem;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 0.55rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 100;
  transition: top 0.18s ease;
}
.skip-link:focus { top: 0.6rem; }

/* Boutons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5ch;
  padding: 0.85rem 1.35rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-hover); color: var(--accent-ink); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

/* En-tête */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}
.brand {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.1rem;
  color: var(--text);
  text-decoration: none;
}
.brand-name {
  display: inline-flex;
  align-items: center;
  gap: 0.55ch;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1;
}
.brand-tag {
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.01em;
}
.brand .prompt { color: var(--accent); }
.brand .cursor {
  width: 0.6ch;
  height: 1.05em;
  background: var(--accent);
  display: inline-block;
  animation: blink 1.1s steps(2, start) infinite;
}
@keyframes blink { to { opacity: 0; } }

.nav-links { display: flex; align-items: center; gap: clamp(0.6rem, 2vw, 1.6rem); list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.97rem; font-weight: 600; }
.nav-links a:hover { color: var(--text); }
.nav-links .btn { color: var(--accent-ink); }

.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5ch;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.8rem;
    font-weight: 600;
    cursor: pointer;
  }
  .nav-links {
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--ink-2);
    border-bottom: 1px solid var(--border);
    padding: 0.4rem 1.1rem 1.1rem;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { display: block; padding: 0.85rem 0.2rem; text-align: right; }
  .nav-links li:last-child { margin-top: 0.7rem; text-align: right; }
  .nav-links .btn { display: inline-flex; }
}

/* Sections */
section { padding-block: var(--section-y); }
.section-head { margin-bottom: clamp(1.8rem, 4vw, 2.8rem); }
.section-head .lead { max-width: none; }

/* Hero */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(4rem, 11vw, 8rem);
  border-bottom: 1px solid var(--border);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
/* Voile sombre sur la photo : garde le texte du hero clair et lisible
   même si le reste de la page est en thème clair (Sauge clair) */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 420px at 88% 8%, var(--hero-glow), transparent 60%),
    linear-gradient(100deg, var(--hero-scrim-1) 0%, var(--hero-scrim-2) 48%, var(--hero-scrim-3) 100%);
}
@media (max-width: 720px) {
  .hero::before {
    background:
      radial-gradient(700px 380px at 80% 6%, var(--hero-glow), transparent 60%),
      linear-gradient(180deg, var(--hero-scrim-2) 0%, var(--hero-scrim-1) 100%);
  }
}
.hero-content { position: relative; }
.hero-copy { min-width: 0; max-width: 80ch; color: var(--hero-text); }
.hero h1 { margin-bottom: 0.6rem; color: var(--hero-text); }
.hero .lead { color: var(--hero-muted); }
.hero .eyebrow { color: var(--hero-accent); }
.hero .eyebrow::before { color: var(--hero-muted); }
.hero .accent { color: var(--hero-accent); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.6rem; }
@media (max-width: 560px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
}
/* Bouton fantôme lisible sur le voile sombre du hero */
.hero .btn-ghost { color: var(--hero-text); border-color: rgba(255, 255, 255, 0.45); }
.hero .btn-ghost:hover { color: var(--hero-accent); border-color: var(--hero-accent); }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.75rem;
  margin-top: 2rem;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.55ch;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: clamp(0.88rem, 0.82rem + 0.3vw, 1rem);
  font-weight: 600;
  color: var(--hero-text);
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  padding: 0.4rem 0.9rem 0.4rem 0.7rem;
  backdrop-filter: blur(4px);
}
.hero-tag::before { content: "▸"; color: var(--hero-accent); font-size: 0.75em; }
.hero-tag--wide { color: var(--hero-accent); border-color: rgba(154,211,189,0.3); background: rgba(154,211,189,0.08); }

/* Grilles cartes */
.grid { display: grid; gap: var(--gap); }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 760px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.3rem, 3vw, 1.8rem);
  position: relative;
  overflow: hidden;
  transition: border-color 0.28s ease, box-shadow 0.28s ease;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent-soft) 0%, transparent 55%);
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}
.card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 28px -6px rgba(47,111,91,0.18);
}
.card:hover::after { opacity: 1; }
.card .num { font-family: var(--mono); color: var(--accent); font-size: 0.85rem; }
.card h3 { margin-top: 0.6rem; }
.card p { color: var(--muted); margin-bottom: 0; }

/* Méthode / points forts */
.method-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.method-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: start;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 1.05rem 1.2rem;
  transition: background-color 0.25s ease, border-left-color 0.25s ease, transform 0.25s ease;
}
.method-list li:hover {
  background-color: var(--surface);
  border-left-color: var(--accent-hover);
  transform: translateX(5px);
}
.method-list .mark { font-family: var(--mono); color: var(--accent); font-weight: 700; }
.method-list strong { display: block; }
.method-list span { color: var(--muted); }

/* Réalisations */
.work-grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.work {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem;
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.work:hover { transform: translateY(-3px); border-color: var(--accent); }
.work-shot { display: block; margin: -1.3rem -1.3rem 0.9rem; }
.work-shot img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
  display: block;
  border-bottom: 1px solid var(--border);
}
.work .domain { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; }
.work .go { margin-top: auto; color: var(--accent); font-weight: 600; font-size: 0.9rem; }
.work .go::after { content: " ↗"; }
.work .note { color: var(--muted); font-size: 0.9rem; }

/* Bloc "ce site est une démo" */
.proof {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 4vw, 2.4rem);
}
.proof-grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
  margin-top: 1.4rem;
}
@media (min-width: 640px) { .proof-grid { grid-template-columns: repeat(3, 1fr); } }
.proof-col-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin: 0 0 0.7rem;
}
.proof-tags { display: grid; gap: 0.45rem; padding: 0; list-style: none; margin: 0; }
.proof-tags li {
  display: flex;
  align-items: center;
  gap: 0.6ch;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text);
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.85rem;
}
.proof-tags li::before { content: "✓"; color: var(--ok); flex-shrink: 0; }

/* Observatory — score Mozilla HTTP Observatory */
.observatory-callout {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 0.6rem 1.2rem;
  align-items: center;
  margin-top: 1.6rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--border);
}
@media (max-width: 640px) {
  .observatory-callout { grid-template-columns: auto 1fr; }
  .obs-hook { grid-column: 1 / -1; }
}
.obs-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.obs-meta { display: flex; flex-direction: column; gap: 0.15rem; }
.obs-stat { font-family: var(--mono); font-size: 1.4rem; font-weight: 800; color: var(--text); line-height: 1; }
.obs-label { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
.obs-hook { margin: 0; font-size: clamp(0.95rem, 0.88rem + 0.35vw, 1.15rem); color: var(--accent); font-style: italic; line-height: 1.3; text-align: center; }

/* Contact */
.contact-grid { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 880px) { .contact-grid { grid-template-columns: 0.85fr 1.15fr; } }

.contact-info { display: grid; gap: 1.1rem; align-content: start; }
.contact-info a { font-weight: 600; }
.contact-info .label { font-family: var(--mono); color: var(--muted); font-size: 0.82rem; display: block; }

.form { display: grid; gap: 1rem; }
.field { display: grid; gap: 0.4rem; }
.field label { font-weight: 600; font-size: 0.95rem; }
.field .req { color: var(--accent); }
.field input,
.field textarea {
  font: inherit;
  color: var(--text);
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus-visible,
.field textarea:focus-visible { border-color: var(--accent); outline-offset: 0; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-note { color: var(--muted); font-size: 0.85rem; }
.form-note a { font-weight: 600; }

.alert {
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--border);
  font-weight: 600;
}
.alert-ok { background: rgba(111, 208, 140, 0.12); border-color: rgba(111, 208, 140, 0.4); color: var(--alert-ok-text); }
.alert-err { background: rgba(255, 141, 122, 0.12); border-color: rgba(255, 141, 122, 0.4); color: var(--alert-err-text); }

/* Pied de page */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--ink-2);
  padding-block: clamp(2rem, 5vw, 3rem);
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-grid { display: flex; flex-wrap: wrap; gap: 1.2rem 2.5rem; justify-content: space-between; }
.footer-grid nav { display: flex; flex-wrap: wrap; gap: 0.4rem 1.3rem; }
.footer-grid a { color: var(--muted); text-decoration: none; }
.footer-grid a:hover { color: var(--text); }
.footer-bottom { margin-top: 1.5rem; font-family: var(--mono); font-size: 0.8rem; }

/* Pages légales */
.legal { padding-block: clamp(2.5rem, 6vw, 4rem); }
.legal .wrap { max-width: 760px; }
.legal h2 { margin-top: 2rem; }
.legal .todo {
  background: var(--accent-soft);
  border: 1px dashed var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
}
.back-home { display: inline-block; margin-bottom: 1.5rem; font-weight: 600; }

/* Animations reveal au scroll */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
/* Sans JavaScript : ne jamais masquer le contenu (cartes, méthode, réalisations, preuve) */
.no-js .reveal {
  opacity: 1;
  transform: none;
}
.revealed {
  opacity: 1;
  transform: translateY(0);
}
/* Décalages pour les séries (cartes, réalisations, items méthode) */
.grid-3 .card.reveal:nth-child(2),
.work-grid .work.reveal:nth-child(2),
.method-list li.reveal:nth-child(2) { transition-delay: 0.1s; }
.grid-3 .card.reveal:nth-child(3),
.work-grid .work.reveal:nth-child(3),
.method-list li.reveal:nth-child(3) { transition-delay: 0.2s; }