/* Elixio AI — feuille de style principale (identité claire, corporative) */

:root {
  --white: #FFFFFF;
  --ground: #FFFFFF;
  --ground-alt: #F4F7FB;
  --navy: #0C1B33;
  --navy-soft: #12294A;
  --text: #10233D;
  --muted: #52637A;
  --muted-dim: #7A8899;
  --line: #E1E7EF;
  --line-strong: #C9D3E0;
  --accent: #204ECF;
  --accent-dark: #1A3FA8;
  --accent-tint: #EDF1FE;
  --radius: 8px;
  --radius-sm: 5px;
  --maxw: 1200px;
  --font-display: "Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { max-width: 100%; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.14;
  color: var(--text);
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.2rem, 4.6vw, 3.5rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.75rem, 3vw, 2.45rem); letter-spacing: -0.026em; }
h3 { font-size: 1.14rem; font-weight: 700; }

p { margin: 0 0 1.1em; color: var(--muted); }
strong { color: var(--text); font-weight: 600; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 26px; }

.skip { position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff; padding: 10px 16px; z-index: 100; }
.skip:focus { left: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 30px; height: 74px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em; color: var(--navy); }
.brand svg { width: 34px; height: 34px; flex: none; border-radius: 7.5px; }
.brand span i { font-style: normal; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav-links a { font-size: 0.97rem; font-weight: 600; color: var(--text); padding: 4px 0; border-bottom: 2px solid transparent; transition: color .16s ease, border-color .16s ease; }
.nav-links a:hover { color: var(--accent); }
.nav-links a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }
.nav-side { display: flex; align-items: center; gap: 16px; }
.lang { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em; color: var(--muted); border: 1px solid var(--line-strong); border-radius: var(--radius-sm); padding: 6px 10px; }
.lang:hover { color: var(--accent); border-color: var(--accent); }
.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); width: 42px; height: 40px; color: var(--text); cursor: pointer; margin-left: auto; }
.nav-toggle span { display: block; width: 17px; height: 2px; background: currentColor; margin: 3.5px auto; border-radius: 2px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  padding: 14px 26px; border-radius: var(--radius-sm); border: 1.5px solid transparent;
  cursor: pointer; transition: background .16s ease, border-color .16s ease, color .16s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: #E8EEFB; }
.btn-outline-light { border-color: rgba(255,255,255,0.45); color: #fff; }
.btn-outline-light:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.btn-sm { padding: 10px 18px; font-size: 0.94rem; }

/* ---------- Sections ---------- */
section { position: relative; }
.sec { padding: 92px 0; }
.sec-alt { background: var(--ground-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.eyebrow {
  font-family: var(--font-body); font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin: 0 0 16px;
}
.lead { font-size: 1.15rem; color: var(--muted); max-width: 64ch; }
.sec-head { max-width: 68ch; margin-bottom: 52px; }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 76px; background: linear-gradient(180deg, #F7F9FD 0%, #FFFFFF 78%); border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 18ch; }
.hero h1 .accent { color: var(--accent); }
.hero .lead { font-size: 1.22rem; margin-top: 20px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-note { margin-top: 18px; font-size: 0.95rem; color: var(--muted-dim); }

.marks { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; margin-top: 62px; padding-top: 34px; border-top: 1px solid var(--line); }
.marks div { padding-right: 18px; }
.marks dt { font-family: var(--font-display); font-weight: 700; font-size: 1.08rem; color: var(--navy); margin-bottom: 5px; }
.marks dd { margin: 0; font-size: 0.95rem; color: var(--muted); }

/* ---------- Hero foncé (accueil) ---------- */
.hero-dark {
  background:
    radial-gradient(900px 520px at 78% 8%, rgba(47, 107, 255, 0.42), transparent 62%),
    radial-gradient(620px 420px at 8% 92%, rgba(34, 211, 238, 0.16), transparent 66%),
    linear-gradient(158deg, #0A1730 0%, #10265C 52%, #0B1A3A 100%);
  border-bottom: none;
  color: #fff;
  padding: 74px 0 84px;
  position: relative;
  overflow: hidden;
}
.hero-dark::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(80% 70% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(80% 70% at 50% 30%, #000 20%, transparent 78%);
}
.hero-dark .wrap { position: relative; z-index: 1; }
.hero-dark h1, .hero-dark h2, .hero-dark h3 { color: #fff; }
.hero-dark .eyebrow { color: #7FE3F5; }
.hero-dark .lead, .hero-dark p { color: #C8D6EE; }
.hero-dark h1 .accent { color: #7FA6FF; }
.hero-dark .hero-note { color: #93A7C7; }
.hero-dark .btn-ghost { background: transparent; border-color: rgba(255,255,255,0.42); color: #fff; }
.hero-dark .btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.10); color: #fff; }
.hero-dark .marks { border-top-color: rgba(255,255,255,0.16); }
.hero-dark .marks dt { color: #fff; }
.hero-dark .marks dd { color: #A9BBD6; }

.hero-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 54px; align-items: center; }
.hero-grid .hero-cta { margin-top: 28px; }

/* ---------- Schéma ---------- */
.diagram { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 26px 26px 20px; color: var(--text); box-shadow: 0 26px 60px rgba(3, 12, 32, 0.28); }
.diagram-title { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--text); margin-bottom: 18px; }
.diagram svg { display: block; width: 100%; height: auto; }

/* ---------- Captures de projet ---------- */
.shot { margin: 0; border-radius: 10px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 18px 44px rgba(9, 22, 45, 0.10); }
.hero-dark .shot { border-color: rgba(255,255,255,0.18); box-shadow: 0 30px 70px rgba(3, 12, 32, 0.45); }
.shot img { display: block; width: 100%; height: auto; }
.shots { display: grid; gap: 54px; }
.shot-head { margin-bottom: 18px; max-width: 70ch; }
.shot-head h3 { font-size: 1.24rem; margin-bottom: 6px; }
.shot-head p { margin: 0; font-size: 1rem; }

/* ---------- Grilles / cartes ---------- */
.grid { display: grid; gap: 22px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; transition: border-color .18s ease, box-shadow .18s ease;
}
.card:hover { border-color: var(--line-strong); box-shadow: 0 10px 30px rgba(16, 35, 61, 0.07); }
.card h3 { margin-bottom: 10px; }
.card .ico {
  width: 42px; height: 42px; border-radius: 9px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-tint); color: var(--accent); margin-bottom: 18px;
}
.card .ico svg { width: 21px; height: 21px; }
.card p { font-size: 1rem; }
.card p:last-child { margin-bottom: 0; }
.card ul { margin: 16px 0 0; padding: 0; list-style: none; }
.card ul li { position: relative; padding-left: 22px; font-size: 0.97rem; color: var(--muted); margin-bottom: 8px; }
.card ul li::before { content: ""; position: absolute; left: 0; top: 0.56em; width: 10px; height: 5px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

.tag {
  display: inline-flex; align-items: center; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--accent); background: var(--accent-tint);
  border-radius: 999px; padding: 6px 14px; margin-bottom: 20px;
}

/* ---------- Split / panneaux ---------- */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 60px; align-items: center; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px 32px; box-shadow: 0 12px 34px rgba(16,35,61,0.06); }
.panel h3 { font-size: 1.05rem; margin-bottom: 18px; }
.rows { display: grid; }
.rows > div { padding: 15px 0; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; align-items: baseline; font-size: 1rem; }
.rows > div:last-child { border-bottom: none; }
.rows > div span:first-child { color: var(--muted); }
.rows > div span:last-child { color: var(--text); font-weight: 600; text-align: right; font-family: var(--font-display); }
.rows a { color: var(--accent); }

/* ---------- Étapes ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.steps > div { border-top: 3px solid var(--accent); padding-top: 22px; }
.steps .n { font-family: var(--font-display); font-weight: 800; color: var(--accent); font-size: 0.95rem; letter-spacing: 0.06em; display: block; margin-bottom: 12px; }
.steps h3 { font-size: 1.06rem; }
.steps p { font-size: 0.98rem; margin: 0; }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); max-width: 90ch; }
.faq details { border-bottom: 1px solid var(--line); padding: 22px 0; }
.faq summary { cursor: pointer; font-family: var(--font-display); font-weight: 700; font-size: 1.06rem; color: var(--text); list-style: none; display: flex; justify-content: space-between; gap: 22px; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; line-height: 1; font-weight: 400; }
.faq details[open] summary::after { content: "\2013"; }
.faq p { margin: 14px 0 0; font-size: 1rem; }

/* ---------- Formulaire ---------- */
.form { display: grid; gap: 20px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 0.92rem; font-weight: 600; color: var(--text); }
.field input, .field select, .field textarea {
  font-family: var(--font-body); font-size: 1rem; color: var(--text);
  background: #fff; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 13px 14px; width: 100%; transition: border-color .16s ease, box-shadow .16s ease;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); outline: none; }
.field textarea { min-height: 140px; resize: vertical; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.hp { position: absolute; left: -9999px; }

.contact-side { display: grid; gap: 16px; align-content: start; }
.contact-card { background: var(--ground-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 24px; }
.contact-card .k { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-dim); margin-bottom: 6px; }
.contact-card .v { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; color: var(--navy); }
.contact-card a.v:hover { color: var(--accent); }
.contact-card p { font-size: 0.97rem; }

/* ---------- Bande CTA ---------- */
.cta-band { background: var(--navy); color: #fff; padding: 82px 0; }
.cta-band h2 { color: #fff; max-width: 22ch; }
.cta-band p { color: #C3CEDD; }
.cta-band .hero-cta { margin-top: 28px; }

/* ---------- Footer ---------- */
footer { background: var(--navy); color: #C3CEDD; padding: 62px 0 40px; border-top: 1px solid rgba(255,255,255,0.08); }
footer .brand { color: #fff; }
footer .brand span i { color: #7E9BF5; }
.foot { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 48px; }
.foot p { font-size: 0.97rem; max-width: 36ch; color: #9FB0C6; }
.foot h4 { font-family: var(--font-body); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: #7E8FA6; margin: 0 0 14px; font-weight: 700; }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin-bottom: 10px; }
.foot a { font-size: 0.98rem; color: #C3CEDD; }
.foot a:hover { color: #fff; }
.foot-bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.12); font-size: 0.9rem; color: #8395AC; }

/* ---------- Animations d'entrée ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1040px) {
  .hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .hero-dark { padding: 58px 0 66px; }
}
@media (max-width: 980px) {
  .g3, .marks, .steps { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .foot { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
  .nav-links {
    position: absolute; top: 74px; left: 0; right: 0; flex-direction: column; align-items: flex-start;
    gap: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 6px 26px 18px; display: none;
    box-shadow: 0 18px 30px rgba(16,35,61,0.08);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 0; width: 100%; border-bottom: 1px solid var(--line); font-size: 1.05rem; }
  .nav-toggle { display: block; }
  .nav-side .btn { display: none; }
}
@media (max-width: 620px) {
  body { font-size: 16.5px; }
  .sec { padding: 64px 0; }
  .hero { padding: 58px 0 54px; }
  .g3, .g2, .marks, .steps, .field-row, .foot { grid-template-columns: 1fr; }
  .card { padding: 26px 22px; }
  .marks { gap: 22px; }
  .demo-steps { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .demo-body { padding: 18px 16px 20px; }
}