/* Hyperplane Tech — feuille de style principale */

:root {
  /* Couleurs */
  --ink:        #0a0f1c;
  --ink-soft:   #2c3550;
  --muted:      #5b6478;
  --line:       #e3e6ee;
  --surface:    #ffffff;
  --surface-2:  #f6f7fb;
  --accent:     #2f4bd8;
  --accent-ink: #1c2f9e;
  --accent-bg:  #eef1ff;

  /* Typographie */
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* Rythme */
  --wrap: 1120px;
  --gutter: 24px;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:        #eef1f8;
    --ink-soft:   #c2c9db;
    --muted:      #8f98ad;
    --line:       #232a3d;
    --surface:    #0a0f1c;
    --surface-2:  #111726;
    --accent:     #8aa0ff;
    --accent-ink: #b3c1ff;
    --accent-bg:  #161d33;
  }
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { color: var(--ink); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2.3rem, 5.2vw, 3.6rem); font-weight: 700; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.15rem); font-weight: 650; }
h3 { font-size: 1.12rem; font-weight: 640; }
p  { margin: 0 0 1.1em; }
a  { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); text-decoration: underline; text-underline-offset: 3px; }
ul { margin: 0 0 1.1em; padding-left: 1.15em; }
li { margin-bottom: 0.4em; }
strong { color: var(--ink); font-weight: 620; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1em;
}

.lead { font-size: 1.16rem; color: var(--muted); max-width: 62ch; }

/* Les attributs SVG ne comprennent pas var(), ces classes prennent le relais
   pour que le bleu suive le thème clair ou sombre. */
.mk-accent { stroke: var(--accent); }
.fl-accent { fill: var(--accent); }

/* ---------- En-tête ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 640;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; color: var(--ink); }
.brand svg { display: block; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a:not(.btn) {
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 500;
}
.nav a:not(.btn):hover { color: var(--accent); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 7px 10px;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- Boutons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 560;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); color: #fff; }
@media (prefers-color-scheme: dark) {
  .btn-primary { color: #0a0f1c; }
  .btn-primary:hover { color: #0a0f1c; }
}
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Sections ---------- */

section { padding: 84px 0; border-top: 1px solid var(--line); }
section:first-of-type { border-top: 0; }
.section-alt { background: var(--surface-2); }
.section-head { max-width: 70ch; margin-bottom: 48px; }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 104px 0 92px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: center;
}
.hero p.lead { font-size: 1.24rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-figure svg { width: 100%; height: auto; display: block; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Cartes ---------- */

.cards { display: grid; gap: 22px; }
.cards-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.section-alt .card { background: var(--surface); }
.card h3 { margin-bottom: 0.45em; }
.card p:last-child { margin-bottom: 0; }
.card ul:last-child { margin-bottom: 0; }

.card-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-bg);
  border-radius: 999px;
  padding: 4px 11px;
  margin-bottom: 16px;
}

/* ---------- Catalogue de formations ---------- */

.course-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.course {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 32px;
  align-items: start;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}
.course h3 { margin-bottom: 0.35em; }
.course p { margin-bottom: 0; color: var(--muted); }
.course-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.9;
  color: var(--muted);
  text-align: right;
}
.course-meta span { display: block; }
.course-meta b { color: var(--ink); font-weight: 560; }

/* ---------- Étapes ---------- */

.steps { counter-reset: step; display: grid; gap: 26px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.step { position: relative; padding-top: 22px; border-top: 2px solid var(--accent); }
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
}
.step h3 { margin-bottom: 0.4em; }
.step p { margin-bottom: 0; color: var(--muted); font-size: 0.97rem; }

/* ---------- À propos ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 56px;
  align-items: start;
}
.about-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--surface);
  font-size: 0.95rem;
}
.about-card dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.about-card dd { margin: 0 0 18px; color: var(--ink); }
.about-card dd:last-child { margin-bottom: 0; }

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}
.contact-mail {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 640;
  letter-spacing: -0.02em;
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 3px;
}
.contact-mail:hover { text-decoration: none; color: var(--accent); }

/* ---------- Pied de page ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
  font-size: 0.88rem;
  color: var(--muted);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  align-items: center;
  justify-content: space-between;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }
.footer-links { display: flex; gap: 24px; }

/* ---------- Page 404 ---------- */

.center-page {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .hero-figure { max-width: 460px; margin: 0 auto; }
  .cards-3, .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  section { padding: 62px 0; }
  .hero { padding: 64px 0 56px; }
  .cards-2, .cards-3, .steps { grid-template-columns: minmax(0, 1fr); }
  .course { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .course-meta { text-align: left; }
  .course-meta span { display: inline; margin-right: 18px; }

  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a:not(.btn) { padding: 12px var(--gutter); }
  .nav .btn { margin: 10px var(--gutter); justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn:hover { transform: none; }
}