/* ============================================================
   Formation CKA — feuille de style
   Thème sobre, sombre, cloud natif. Accent Kubernetes (#326CE5).
   ============================================================ */

:root {
  --bg:        #0a0f1c;
  --bg-soft:   #0e1526;
  --surface:   rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border:    rgba(255, 255, 255, 0.10);
  --border-2:  rgba(255, 255, 255, 0.16);

  --text:      #e8edf7;
  --text-soft: #aab4c8;
  --text-dim:  #6c7790;

  --k8s:       #326ce5;
  --k8s-light: #5b9bff;
  --k8s-glow:  rgba(50, 108, 229, 0.35);

  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1140px;

  --font-display: "Sora", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -0.02em; }

a { color: inherit; text-decoration: none; }

/* ============================================================
   Décor d'arrière-plan
   ============================================================ */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(1200px 800px at 80% -10%, #12203f 0%, transparent 55%),
    radial-gradient(900px 700px at -10% 20%, #0f1830 0%, transparent 50%),
    var(--bg);
}

.bg-glow { position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.5; }
.bg-glow--1 { width: 520px; height: 520px; top: -160px; right: -80px;  background: var(--k8s-glow); }
.bg-glow--2 { width: 460px; height: 460px; bottom: -180px; left: -120px; background: rgba(91, 155, 255, 0.18); }

.bg-hex { position: absolute; inset: 0; color: rgba(120, 150, 210, 0.06); }

.bg-helm, .bg-cloud { position: absolute; color: rgba(120, 160, 230, 0.10); }

.bg-helm--a { width: 340px; top: 12%; right: 4%; animation: spin 90s linear infinite; }
.helm-spokes { transform-origin: 100px 100px; }

.bg-cloud--a { width: 240px; top: 58%;  left: 3%;  animation: drift 26s ease-in-out infinite; }
.bg-cloud--b { width: 180px; top: 30%;  left: 42%; opacity: 0.6; animation: drift 34s ease-in-out infinite reverse; }

@keyframes spin  { to { transform: rotate(360deg); } }
@keyframes drift { 50% { transform: translateY(-26px) translateX(14px); } }

/* ============================================================
   Mise en page générale
   ============================================================ */
.section { max-width: var(--maxw); margin: 0 auto; padding: 96px 24px; }

.section__head { max-width: 720px; margin-bottom: 48px; }
.section__head h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin: 10px 0 16px; }
.section__intro { color: var(--text-soft); font-size: 1.08rem; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--k8s-light);
}
.eyebrow__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--k8s-light); box-shadow: 0 0 12px var(--k8s-light); }

.grad {
  background: linear-gradient(100deg, var(--k8s-light), #9cc2ff 60%, var(--text));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ============================================================
   Boutons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 13px 24px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .18s ease, box-shadow .25s ease, background .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn--small { padding: 9px 18px; font-size: 0.88rem; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--k8s); color: #fff;
  box-shadow: 0 8px 28px -8px var(--k8s-glow);
}
.btn--primary:hover { background: #3f78ee; transform: translateY(-2px); box-shadow: 0 14px 34px -8px var(--k8s-glow); }

.btn--ghost { background: var(--surface); color: var(--text); border-color: var(--border-2); }
.btn--ghost:hover { background: var(--surface-2); border-color: var(--k8s-light); transform: translateY(-2px); }

/* ============================================================
   En-tête
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 24px;
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; }
.brand__mark { color: var(--k8s-light); display: inline-flex; }
.brand__dot { color: var(--k8s-light); }

.site-nav { display: flex; gap: 26px; margin-left: auto; }
.site-nav a { color: var(--text-soft); font-size: 0.95rem; transition: color .2s ease; }
.site-nav a:hover { color: var(--text); }

/* ============================================================
   Hero
   ============================================================ */
.hero { max-width: var(--maxw); margin: 0 auto; padding: 110px 24px 60px; }
.hero__inner { max-width: 800px; }
.hero__title { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 800; margin: 20px 0 22px; }
.hero__lead { font-size: 1.18rem; color: var(--text-soft); max-width: 620px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0 50px; }

.hero__facts {
  display: flex; flex-wrap: wrap; gap: 36px;
  list-style: none; padding-top: 32px; border-top: 1px solid var(--border);
}
.hero__facts strong { display: block; font-family: var(--font-display); font-size: 1.9rem; font-weight: 700; }
.hero__facts span { color: var(--text-dim); font-size: 0.9rem; font-family: var(--font-mono); }

/* ============================================================
   Cartes (certification)
   ============================================================ */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 56px; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-2); background: var(--surface-2); }
.card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 12px; margin-bottom: 16px;
  background: rgba(50, 108, 229, 0.14); color: var(--k8s-light);
  font-size: 1.4rem; border: 1px solid rgba(91, 155, 255, 0.25);
}
.card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.card p { color: var(--text-soft); font-size: 0.97rem; }

.why { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.why__title { font-size: 1.3rem; margin-bottom: 20px; }
.why__list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 14px 32px; }
.why__list li { color: var(--text-soft); display: flex; gap: 12px; align-items: flex-start; }

.check { color: var(--k8s-light); font-weight: 700; flex-shrink: 0; }

/* ============================================================
   Offre
   ============================================================ */
.offer {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: 0;
  border: 1px solid var(--border-2); border-radius: 22px; overflow: hidden;
  background: var(--bg-soft);
}
.offer__main { padding: 40px; }
.offer__badge {
  display: inline-block; font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--k8s-light);
  background: rgba(50, 108, 229, 0.14); border: 1px solid rgba(91, 155, 255, 0.25);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 18px;
}
.offer__name { font-size: 1.8rem; }
.offer__sub { color: var(--text-dim); font-family: var(--font-mono); font-size: 0.9rem; margin-bottom: 24px; }
.offer__features { list-style: none; display: grid; gap: 12px; margin-bottom: 32px; }
.offer__features li { color: var(--text-soft); display: flex; gap: 12px; }

.program { display: grid; gap: 14px; border-top: 1px solid var(--border); padding-top: 26px; }
.program__day { display: flex; gap: 16px; align-items: flex-start; }
.program__num {
  flex-shrink: 0; font-family: var(--font-mono); font-weight: 500; font-size: 0.85rem;
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 10px; background: var(--surface-2); border: 1px solid var(--border-2);
  color: var(--k8s-light);
}
.program__day strong { font-family: var(--font-display); }
.program__day p { color: var(--text-dim); font-size: 0.92rem; }

.offer__side {
  padding: 40px; background: linear-gradient(180deg, rgba(50,108,229,0.10), transparent);
  border-left: 1px solid var(--border); display: flex; flex-direction: column;
}
.offer__price-label { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dim); }
.offer__price { margin: 6px 0 22px; }
.offer__price span { font-family: var(--font-display); font-size: 2.6rem; font-weight: 800; }
.offer__price small { display: block; color: var(--text-dim); font-size: 0.9rem; font-weight: 400; }
.offer__meta { list-style: none; display: grid; gap: 11px; margin-bottom: 28px; color: var(--text-soft); font-size: 0.95rem; }
.offer__note { text-align: center; color: var(--text-dim); font-size: 0.82rem; margin-top: 14px; }

/* Bouton-option (sélecteur du bon de certification) */
.option {
  display: flex; align-items: center; gap: 14px; width: 100%; text-align: left;
  background: var(--surface); border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  padding: 14px 16px; margin: 4px 0 18px; cursor: pointer; font-family: inherit; color: var(--text);
  transition: border-color .2s ease, background .2s ease;
}
.option:hover { border-color: var(--k8s-light); background: var(--surface-2); }
.option__check {
  flex-shrink: 0; width: 22px; height: 22px; border-radius: 7px;
  border: 2px solid var(--border-2); display: grid; place-items: center;
  transition: border-color .2s ease, background .2s ease;
}
.option__check::after {
  content: "✓"; font-size: 0.8rem; font-weight: 700; color: #fff;
  opacity: 0; transform: scale(0.6); transition: opacity .15s ease, transform .15s ease;
}
.option[aria-checked="true"] { border-color: var(--k8s-light); background: rgba(50,108,229,0.10); }
.option[aria-checked="true"] .option__check { background: var(--k8s); border-color: var(--k8s); }
.option[aria-checked="true"] .option__check::after { opacity: 1; transform: scale(1); }
.option__body { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.option__title { font-family: var(--font-display); font-weight: 600; font-size: 0.95rem; }
.option__desc { color: var(--text-dim); font-size: 0.85rem; }
.option__price { font-family: var(--font-mono); font-weight: 500; color: var(--k8s-light); white-space: nowrap; }

/* Total dans l'encart offre */
.offer__total {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 14px 0 18px; border-top: 1px solid var(--border); margin-bottom: 8px;
}
.offer__total-label { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); }
.offer__total-value { font-family: var(--font-display); font-weight: 800; font-size: 1.7rem; }

/* Total dans l'étape 1 du parcours */
.chosen-total {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 14px 18px; margin-bottom: 20px; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border);
}
.chosen-total span { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); }
.chosen-total strong { font-family: var(--font-display); font-size: 1.4rem; }

/* ============================================================
   Formateur
   ============================================================ */
.trainer {
  display: grid; grid-template-columns: 220px 1fr; gap: 48px; align-items: center;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 22px; padding: 48px;
}
.trainer__photo {
  width: 180px; height: 180px; border-radius: 24px; display: grid; place-items: center;
  background: radial-gradient(circle at 30% 30%, #1c2c52, #0c1326);
  border: 1px solid var(--border-2); box-shadow: inset 0 0 40px rgba(50,108,229,0.18);
}
.trainer__initials { font-family: var(--font-display); font-weight: 800; font-size: 3.4rem; color: var(--k8s-light); }
.trainer__name { font-size: 2rem; margin: 8px 0 18px; }
.trainer__body p { color: var(--text-soft); margin-bottom: 14px; }
.trainer__tags { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.trainer__tags li {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-soft);
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px;
}

/* ============================================================
   Réservation (étapes)
   ============================================================ */
.steps { list-style: none; display: grid; gap: 18px; max-width: 880px; }
.step {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); overflow: hidden; opacity: 0.55; transition: opacity .3s ease, border-color .3s ease;
}
.step.is-active { opacity: 1; border-color: var(--border-2); background: var(--bg-soft); }
.step__head { display: flex; align-items: center; gap: 16px; padding: 22px 28px; }
.step__num {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 700; flex-shrink: 0;
  background: var(--surface-2); border: 1px solid var(--border-2); color: var(--text-soft);
}
.step.is-active .step__num { background: var(--k8s); border-color: var(--k8s); color: #fff; }
.step__head h3 { font-size: 1.2rem; }

.step__body { padding: 0 28px 28px; display: none; }
.step.is-active .step__body { display: block; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.step__hint { color: var(--text-soft); margin-bottom: 18px; }
.step__actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

.chosen {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--surface-2); border: 1px solid var(--border-2);
  border-radius: var(--radius-sm); padding: 18px 22px; margin-bottom: 22px;
}
.chosen strong { display: block; font-family: var(--font-display); }
.chosen span { color: var(--text-dim); font-size: 0.9rem; }
.chosen__tag {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--k8s-light); background: rgba(50,108,229,0.14); padding: 6px 12px; border-radius: 999px;
  border: 1px solid rgba(91,155,255,0.25); white-space: nowrap;
}

.calendly-wrap { border-radius: var(--radius-sm); overflow: hidden; min-height: 660px; background: #fff; }
.calendly-wrap .calendly-inline-widget { min-width: 320px; height: 660px; }
.calendly-fallback {
  display: grid; place-items: center; gap: 12px; min-height: 280px; text-align: center;
  color: var(--text-soft); padding: 30px; background: var(--surface); border-radius: var(--radius-sm);
}

.finalize { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.finalize__card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 26px;
  background: var(--surface); display: flex; flex-direction: column;
}
.finalize__card--accent { border-color: rgba(91,155,255,0.4); background: linear-gradient(180deg, rgba(50,108,229,0.10), transparent); }
.finalize__card h4 { font-size: 1.15rem; margin-bottom: 8px; }
.finalize__card p { color: var(--text-soft); font-size: 0.95rem; flex: 1; margin-bottom: 20px; }

/* ============================================================
   Contact
   ============================================================ */
.contact {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start;
}
.contact__text h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 10px 0 16px; }
.contact__text p { color: var(--text-soft); margin-bottom: 26px; }
.contact__email {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 1.05rem; color: var(--k8s-light);
  border: 1px solid var(--border-2); border-radius: 999px; padding: 12px 22px;
  transition: border-color .2s ease, background .2s ease;
}
.contact__email:hover { border-color: var(--k8s-light); background: rgba(50,108,229,0.10); }

.contact__card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.contact__card h3 { font-size: 1.25rem; margin-bottom: 20px; }
.contact__card form { display: grid; gap: 16px; }
.contact__card label { display: grid; gap: 7px; font-size: 0.9rem; color: var(--text-soft); font-family: var(--font-mono); }
.contact__card input, .contact__card textarea {
  font-family: var(--font-body); font-size: 1rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  padding: 12px 14px; resize: vertical; transition: border-color .2s ease;
}
.contact__card input:focus, .contact__card textarea:focus { outline: none; border-color: var(--k8s-light); }
.contact__hint { color: var(--text-dim); font-size: 0.82rem; text-align: center; }

/* ============================================================
   Pied de page
   ============================================================ */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; }
.site-footer__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 28px 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  color: var(--text-dim); font-size: 0.88rem;
}
.site-footer__mono { font-family: var(--font-mono); }

/* ============================================================
   Animations d'apparition
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .cards { grid-template-columns: 1fr; }
  .why__list { grid-template-columns: 1fr; }
  .offer { grid-template-columns: 1fr; }
  .offer__side { border-left: none; border-top: 1px solid var(--border); }
  .trainer { grid-template-columns: 1fr; text-align: center; padding: 36px 26px; }
  .trainer__photo { margin: 0 auto; }
  .trainer__tags { justify-content: center; }
  .finalize { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .section { padding: 64px 18px; }
  .hero { padding: 70px 18px 40px; }
  .offer__main, .offer__side, .contact__card, .why { padding: 26px; }
  .hero__facts { gap: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}