/* ============================================================================
   ELI TECH — atelier-ia.css
   Landing dédiée /atelier-ia-tpe
   Utilise tokens.css + ui.css. Styles préfixés .ia-* pour éviter tout conflit.
   ============================================================================ */

.ia-page { background: var(--bg); color: var(--ink); }
.ia-page main { padding-top: 0; }

/* ============================================================
   TYPO PARTAGÉE
============================================================ */
.ia-h1 {
  font-family: var(--font);
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--ink);
  margin: 0 0 var(--s-5);
}
.ia-h1 em.serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.ia-h2 {
  font-family: var(--font);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: var(--lh-snug);
  letter-spacing: var(--ls-snug);
  color: var(--ink);
  margin: 0 0 var(--s-3);
}
.ia-h2 em.serif {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.02em;
}

/* ============================================================
   SECTIONS
============================================================ */
.ia-section {
  padding: clamp(56px, 8vw, 110px) 0;
  position: relative;
}
.ia-section-alt { background: var(--bg-alt); }
.ia-section-head {
  max-width: 760px;
  margin: 0 auto var(--s-10);
  text-align: center;
}
.ia-section-head .lead { margin: var(--s-3) auto 0; }

/* ============================================================
   1. HERO
============================================================ */
.ia-hero {
  position: relative;
  padding: clamp(120px, 14vw, 180px) 0 clamp(56px, 8vw, 100px);
  overflow: hidden;
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(46,88,122,0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(46,88,122,0.08), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--surface2) 100%);
  isolation: isolate;
}
.ia-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.ia-hero-text { min-width: 0; }
.ia-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(46,88,122,0.10);
  color: var(--accent);
  border-radius: var(--r-pill);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: var(--s-5);
}
.ia-eyebrow .ia-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(46,88,122,0.15);
}
.ia-lead {
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.55;
  color: var(--ink-2);
  font-weight: 400;
  max-width: 580px;
  margin: 0 0 var(--s-6);
}
.ia-lead strong { color: var(--ink); font-weight: 600; }
.ia-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
}
.ia-hero-reassure {
  font-size: 13px;
  color: var(--ink-3);
  margin: 0;
  letter-spacing: 0.01em;
}
.ia-hero-reassure strong { color: var(--ink); font-weight: 600; }

/* Hero card */
.ia-hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: clamp(20px, 3vw, 30px);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.6) inset,
    var(--shadow-2xl);
  position: relative;
  isolation: isolate;
}
.ia-hero-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, rgba(46,88,122,0.30), rgba(46,88,122,0.05) 40%, transparent 70%);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.ia-card-head {
  margin-bottom: var(--s-5);
  padding-bottom: var(--s-4);
  border-bottom: 1px solid var(--border);
}
.ia-card-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.ia-card-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.ia-card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin: 0;
  padding: 0;
}
.ia-card-list li {
  display: flex;
  gap: var(--s-3);
  align-items: flex-start;
}
.ia-card-list li strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}
.ia-card-list li span {
  display: block;
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.4;
}
.ia-check {
  flex-shrink: 0;
  width: 26px; height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  border-radius: var(--r-pill);
  box-shadow: 0 4px 12px rgba(46,88,122,0.25);
}
.ia-card-foot {
  margin-top: var(--s-5);
  padding-top: var(--s-4);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
}
.ia-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.ia-pill-soft {
  background: var(--accent-soft);
  color: var(--accent);
}

@media (max-width: 900px) {
  .ia-hero-inner { grid-template-columns: 1fr; }
  .ia-hero-card { order: 2; }
  .ia-hero-actions .btn { flex: 1 1 220px; }
}

/* ============================================================
   2. PROBLÈME
============================================================ */
.ia-problem-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 820px;
  display: grid;
  gap: var(--s-3);
}
.ia-problem-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  padding: var(--s-4) var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--error);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
}
.ia-problem-list p { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.5; }
.ia-x {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px; height: 24px;
  flex-shrink: 0;
  background: var(--error-bg);
  color: var(--error);
  border-radius: var(--r-pill);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
}

/* ============================================================
   3. SOLUTION
============================================================ */
.ia-solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}
.ia-solution-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: clamp(24px, 3vw, 32px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-normal) var(--ease), box-shadow var(--dur-normal) var(--ease), border-color var(--dur-normal) var(--ease);
}
.ia-solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-2);
}
.ia-solution-icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--s-4);
}
.ia-solution-card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 var(--s-2);
  color: var(--ink);
}
.ia-solution-card p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-3);
  margin: 0;
}
@media (max-width: 900px) { .ia-solution-grid { grid-template-columns: 1fr; } }

/* ============================================================
   4. OFFRES
============================================================ */
.ia-formules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
  align-items: stretch;
}
.ia-formule {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: var(--s-8) var(--s-6) var(--s-6);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--dur-normal) var(--ease), box-shadow var(--dur-normal) var(--ease), border-color var(--dur-normal) var(--ease);
}
.ia-formule:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-2);
}
.ia-formule-featured {
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-xl);
  transform: scale(1.02);
}
.ia-formule-featured:hover { transform: translateY(-4px) scale(1.02); }
.ia-formule-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-soft);
  color: var(--accent);
  padding: 6px var(--s-4);
  border-radius: var(--r-pill);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}
.ia-formule-badge-featured {
  background: var(--ink);
  color: #fff;
}
.ia-formule-name {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--s-3);
}
.ia-formule-format {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: var(--s-3);
  font-weight: 500;
}
.ia-formule-price {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: var(--s-3);
}
.ia-formule-amount {
  font-size: clamp(36px, 4.4vw, 50px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1;
}
.ia-formule-tva {
  font-size: 11px;
  color: var(--ink-4);
  font-weight: 500;
}
.ia-formule-tagline {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.5;
  margin: 0 0 var(--s-5);
}
.ia-formule-features {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-6);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  flex: 1;
}
.ia-formule-features li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.5;
}
.ia-formule-features li::before {
  content: "";
  position: absolute;
  left: 0; top: 6px;
  width: 14px; height: 8px;
  border-left: 2px solid var(--success);
  border-bottom: 2px solid var(--success);
  transform: rotate(-45deg);
}
.ia-formule .btn { width: 100%; margin-bottom: var(--s-3); }
.ia-formule-meta {
  font-size: 13px;
  color: var(--ink-4);
  text-align: center;
  margin: 0;
}
.ia-tva-note {
  text-align: center;
  margin: var(--s-8) auto 0;
  font-size: 13px;
  color: var(--ink-4);
  max-width: 720px;
}
@media (max-width: 1080px) {
  .ia-formules-grid { grid-template-columns: 1fr; max-width: 540px; margin: 0 auto; gap: var(--s-6); }
  .ia-formule-featured { transform: none; }
  .ia-formule-featured:hover { transform: translateY(-4px); }
}

/* ============================================================
   5. CAS D'USAGE PAR MÉTIER
============================================================ */
.ia-usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}
.ia-usecase {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--s-6);
  box-shadow: var(--shadow-xs);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ia-usecase:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-2);
}
.ia-usecase-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  background: var(--accent-soft);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.ia-usecase h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}
.ia-usecase p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-3);
  margin: 0;
}
@media (max-width: 980px) { .ia-usecase-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .ia-usecase-grid { grid-template-columns: 1fr; } }

/* ============================================================
   6. FAQ
============================================================ */
.ia-faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  max-width: 760px;
  margin: 0 auto;
}
.ia-faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.ia-faq-item.open { border-color: var(--accent-2); box-shadow: var(--shadow-md); }
.ia-faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding: var(--s-5) var(--s-6);
  text-align: left;
  font-family: var(--font);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  background: transparent;
}
.ia-faq-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 16px;
  font-weight: 600;
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ia-faq-item.open .ia-faq-icon { transform: rotate(45deg); background: var(--accent); color: #fff; }
.ia-faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur-normal) var(--ease);
}
.ia-faq-item.open .ia-faq-a { max-height: 600px; }
.ia-faq-a p {
  margin: 0;
  padding: 0 var(--s-6) var(--s-5);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ============================================================
   7. FORMULAIRE
============================================================ */
.ia-contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
  max-width: 1080px;
  margin: 0 auto;
}
.ia-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: clamp(24px, 3vw, 36px);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.ia-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
}
.ia-form-group { display: flex; flex-direction: column; gap: 6px; }
.ia-form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.ia-form-group input,
.ia-form-group select,
.ia-form-group textarea {
  width: 100%;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 12px 14px;
  font-family: var(--font);
  font-size: 15px;
  color: var(--ink);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ia-form-group input::placeholder,
.ia-form-group textarea::placeholder { color: var(--ink-5); }
.ia-form-group input:focus,
.ia-form-group select:focus,
.ia-form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(46,88,122,0.14);
}
.ia-form-group textarea { resize: vertical; min-height: 96px; }
.ia-form-consent {
  display: flex;
  gap: var(--s-2);
  align-items: flex-start;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.5;
  margin-top: var(--s-1);
}
.ia-form-consent input { margin-top: 2px; }
.ia-form-consent a { color: var(--accent); text-decoration: underline; }
.ia-form-error {
  background: var(--error-bg);
  color: var(--error);
  border: 1px solid #f7c4be;
  border-radius: var(--r-md);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 500;
}
.ia-form-submit { margin-top: var(--s-2); }
.ia-form-reassure {
  text-align: center;
  font-size: 13px;
  color: var(--ink-3);
  margin: 0;
}
.ia-form-state {
  font-size: 14px;
  text-align: center;
  margin-top: var(--s-2);
  display: none;
}
.ia-form-state.is-visible { display: block; }
.ia-form-state.ok { color: #047857; }
.ia-form-state.error { color: var(--error); }

/* Side */
.ia-contact-side {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: clamp(24px, 3vw, 36px);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  position: sticky;
  top: 100px;
}
.ia-contact-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.ia-contact-side p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
}
.ia-contact-actions {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.ia-contact-actions .btn { justify-content: center; }
.ia-contact-trust {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-3);
  border-top: 1px solid var(--border);
  padding-top: var(--s-5);
}
.ia-trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: center;
}
.ia-trust-item strong {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  line-height: 1;
}
.ia-trust-item span {
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

@media (max-width: 980px) {
  .ia-contact-grid { grid-template-columns: 1fr; }
  .ia-contact-side { position: static; }
}
@media (max-width: 600px) {
  .ia-form-row { grid-template-columns: 1fr; }
}

/* ============================================================
   STICKY CTA MOBILE
============================================================ */
.ia-sticky {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 90;
  display: none;
  gap: 8px;
  align-items: center;
  padding: 8px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  box-shadow: 0 18px 40px rgba(15,23,42,0.18);
  transform: translateY(0);
  transition: transform var(--dur-normal) var(--ease), opacity var(--dur-normal) var(--ease);
}
.ia-sticky.hidden { transform: translateY(140%); opacity: 0; pointer-events: none; }
.ia-sticky-btn {
  flex: 1;
  justify-content: center;
  padding: 12px 16px;
  font-size: 14.5px;
  border-radius: var(--r-pill);
}
.ia-sticky-close {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: var(--r-pill);
  background: var(--bg);
  color: var(--ink-3);
  font-size: 20px;
  line-height: 1;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.ia-sticky-close:hover { background: var(--surface2); color: var(--ink); }
@media (max-width: 760px) {
  .ia-sticky { display: flex; }
  body.ia-page main { padding-bottom: 88px; }
}

/* ============================================================
   FOOTER LOCAL OVERRIDE
============================================================ */
.ia-page .footer-cta { padding-top: var(--s-8); }
.ia-page .footer-cta h2 {
  color: #fff;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-3);
}
.ia-page .footer-cta h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
}
.ia-page .footer-cta p {
  color: #B8C4D2;
  margin-bottom: var(--s-5);
  font-size: 15px;
}

/* ============================================================
   REDUCED MOTION
============================================================ */
@media (prefers-reduced-motion: reduce) {
  .ia-formule:hover, .ia-solution-card:hover, .ia-usecase:hover { transform: none; }
}