/* isibuild — landing page styles
   Palette tirée du logo : bleu #1761CF, vert #27AE71 */

:root {
  --blue: #1761CF;
  --blue-deep: #124DA6;
  --blue-soft: #E7EFFC;
  --green: #27AE71;
  --green-deep: #1E8C5A;
  --green-soft: #E3F5EC;
  --ink: #0F2447;
  --slate: #52627C;
  --line: #DCE3EE;
  --mist: #F4F7FB;
  --white: #FFFFFF;
  --radius-l: 20px;
  --radius-m: 12px;
  --radius-s: 8px;
  --max: 1160px;
  --gutter: clamp(20px, 5vw, 48px);
  --header-h: 76px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Segoe UI", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.02em; font-weight: 800; }
h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.75rem, 3.4vw, 2.6rem); max-width: 22ch; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(var(--max), 100% - 2 * var(--gutter)); margin-inline: auto; }
.lede { color: var(--slate); font-size: 1.125rem; max-width: 56ch; }
section { padding-block: clamp(64px, 9vw, 120px); }
.section-head { display: grid; gap: 16px; margin-bottom: clamp(36px, 5vw, 56px); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: var(--radius-s); font-weight: 700;
  transition: top .15s ease;
}
.skip-link:focus { top: 12px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 24px; border-radius: 999px; font-weight: 700; font-size: 1rem;
  border: 2px solid transparent; cursor: pointer; white-space: nowrap; font-family: inherit;
  transition: background-color .15s ease, border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 8px 20px -10px rgba(23,97,207,.6); }
.btn-primary:hover { background: var(--blue-deep); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: var(--green-deep); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { background: var(--mist); }
.btn[disabled] { opacity: .6; cursor: progress; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent; transition: border-color .2s ease, box-shadow .2s ease;
}
.header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 24px -18px rgba(15,36,71,.35); }
.nav { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 24px; position: relative; }
.brand img { height: 38px; width: auto; display: block; }
.nav-links { display: flex; gap: 30px; list-style: none; margin: 0; padding: 0; font-weight: 600; font-size: .95rem; color: var(--slate); }
.nav-links a { padding: 6px 0; border-bottom: 2px solid transparent; transition: color .15s ease, border-color .15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-active { color: var(--ink); border-bottom-color: var(--green); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.burger { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: var(--radius-s); background: #fff; cursor: pointer; padding: 0; }
.burger span { display: block; width: 20px; height: 2px; background: var(--ink); margin: 4px auto; border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav.open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav.open .burger span:nth-child(2) { opacity: 0; }
.nav.open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Hero */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(40px, 6vw, 80px); overflow: hidden; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 50% at 85% 30%, rgba(39,174,113,.10), transparent 70%),
    radial-gradient(50% 45% at 70% 80%, rgba(23,97,207,.10), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.hero-copy { display: grid; gap: 28px; }
.hero-copy .lede { font-size: 1.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--slate); font-size: .95rem; font-weight: 500; list-style: none; margin: 0; padding: 0; }
.hero-proof li { display: flex; align-items: center; gap: 8px; }
.tick { width: 18px; height: 18px; border-radius: 50%; background: var(--green-soft); color: var(--green-deep); display: inline-grid; place-items: center; flex: none; }
.tick svg { width: 10px; height: 10px; }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; display: block; }
.float {
  position: absolute; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-m);
  padding: 10px 14px; font-weight: 700; font-size: .9rem; display: flex; align-items: center; gap: 10px;
  box-shadow: 0 10px 30px -14px rgba(15,36,71,.35);
}
.float .dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.float.f1 { top: 14%; left: 2%; }
.float.f2 { top: 30%; right: 0; }
.float.f3 { bottom: 20%; left: 0; }
.float.f4 { bottom: 6%; right: 4%; }

/* One orchestrated entrance on load (hero only) */
.hero-copy > *, .hero-art { opacity: 0; transform: translateY(14px); animation: rise .6s cubic-bezier(.2,.7,.2,1) forwards; }
.hero-copy > :nth-child(1) { animation-delay: .05s; }
.hero-copy > :nth-child(2) { animation-delay: .15s; }
.hero-copy > :nth-child(3) { animation-delay: .25s; }
.hero-copy > :nth-child(4) { animation-delay: .35s; }
.hero-art { animation-delay: .2s; }
.hero-art .float { opacity: 0; animation: pop .5s cubic-bezier(.2,.7,.2,1) forwards; }
.float.f1 { animation-delay: .7s; } .float.f2 { animation-delay: .85s; } .float.f3 { animation-delay: 1s; } .float.f4 { animation-delay: 1.15s; }
@keyframes rise { to { opacity: 1; transform: none; } }
@keyframes pop { from { opacity: 0; transform: scale(.9); } to { opacity: 1; transform: none; } }

/* Tech strip */
.strip { border-block: 1px solid var(--line); background: var(--mist); padding: 22px 0; }
.strip .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 32px; color: var(--slate); font-weight: 600; font-size: .95rem; }
.strip ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 28px; }

/* Services lifecycle */
.lifecycle { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; list-style: none; margin: 0; padding: 0; }
.lifecycle::before { content: ""; position: absolute; left: 34px; right: calc(25% - 34px); top: 34px; height: 2px; background: linear-gradient(90deg, var(--blue), var(--green)); border-radius: 2px; }
.step { position: relative; padding: 0 28px 0 0; display: grid; gap: 18px; align-content: start; }
.step + .step { padding-left: 28px; }
.step-icon { width: 68px; height: 68px; border-radius: 18px; background: #fff; border: 2px solid var(--line); display: grid; place-items: center; position: relative; z-index: 1; }
.step-icon svg { width: 34px; height: auto; }
.step-n { position: absolute; top: -10px; right: -10px; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: #fff; font-size: .8rem; font-weight: 700; display: grid; place-items: center; }
.step h3 { margin-top: 6px; }
.step p { color: var(--slate); font-size: .98rem; }
.step ul { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 6px; font-size: .92rem; font-weight: 500; }
.step li { display: flex; gap: 8px; align-items: baseline; }
.step li::before { content: ""; width: 6px; height: 6px; border-radius: 2px; background: var(--green); flex: none; transform: translateY(-2px); }
.step:nth-child(-n+2) li::before { background: var(--blue); }

/* Projects (dark) */
.projects { background: var(--ink); color: #fff; }
.projects h2 { color: #fff; }
.projects .lede { color: #B9C6DA; }
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.14); border-left: 1px solid rgba(255,255,255,.14); }
.proj { padding: 28px; border-right: 1px solid rgba(255,255,255,.14); border-bottom: 1px solid rgba(255,255,255,.14); display: grid; gap: 12px; align-content: start; transition: background-color .2s ease; }
.proj:hover { background: rgba(255,255,255,.04); }
.proj h3 { color: #fff; font-size: 1.15rem; }
.proj p { color: #B9C6DA; font-size: .95rem; }
.proj-icon { width: 46px; height: 46px; border-radius: 12px; background: #fff; display: grid; place-items: center; margin-bottom: 8px; }
.proj-icon svg { width: 24px; height: auto; }
.proj-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.proj-tags span { font-size: .78rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: rgba(255,255,255,.1); color: #DCE5F3; }

/* Suivi */
.care-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }
.care-copy { display: grid; gap: 22px; }
.care-list { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 14px; }
.care-list li { display: grid; grid-template-columns: 30px 1fr; gap: 12px; align-items: start; }
.care-list strong { display: block; font-weight: 700; }
.care-list span { color: var(--slate); font-size: .95rem; }
.care-list .tick { width: 26px; height: 26px; margin-top: 2px; }
.care-list .tick svg { width: 13px; height: 13px; }
.panel { background: var(--mist); border: 1px solid var(--line); border-radius: var(--radius-l); padding: 22px; display: grid; gap: 14px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-weight: 700; }
.panel-head small { color: var(--slate); font-weight: 600; font-size: .85rem; }
.status { display: inline-flex; align-items: center; gap: 8px; font-size: .85rem; font-weight: 700; color: var(--green-deep); background: var(--green-soft); padding: 5px 12px; border-radius: 999px; white-space: nowrap; }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 0 rgba(39,174,113,.5); animation: pulse 2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 7px rgba(39,174,113,0); } 100% { box-shadow: 0 0 0 0 rgba(39,174,113,0); } }
.log { list-style: none; padding: 0; margin: 0; display: grid; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-m); overflow: hidden; }
.log li { display: grid; grid-template-columns: 34px 1fr auto; gap: 12px; align-items: center; padding: 14px 16px; font-size: .92rem; }
.log li + li { border-top: 1px solid var(--line); }
.log .lg { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; }
.log .lg svg { width: 18px; height: auto; }
.log strong { display: block; font-weight: 700; }
.log em { font-style: normal; color: var(--slate); font-size: .85rem; }
.log time { color: var(--slate); font-size: .82rem; font-weight: 600; white-space: nowrap; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metric { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-m); padding: 14px; }
.metric b { display: block; font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.metric span { color: var(--slate); font-size: .8rem; font-weight: 600; }

/* Offres */
.offers { background: var(--mist); border-block: 1px solid var(--line); }
.offers-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.offer { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-l); padding: 28px; display: grid; gap: 18px; align-content: start; position: relative; }
.offer.is-featured { border-color: var(--blue); box-shadow: 0 24px 50px -30px rgba(23,97,207,.45); }
.offer-badge { position: absolute; top: -13px; left: 28px; background: var(--blue); color: #fff; font-size: .78rem; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.offer h3 { font-size: 1.3rem; }
.offer .price { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; }
.offer .price small { flex-basis: 100%; color: var(--slate); font-size: .85rem; font-weight: 600; }
.offer .price b { font-size: 2rem; font-weight: 800; letter-spacing: -0.03em; }
.offer .price span { color: var(--slate); font-size: .9rem; font-weight: 600; white-space: nowrap; }
.offer > p { color: var(--slate); font-size: .95rem; }
.offer ul { list-style: none; margin: 0; padding: 18px 0 0; border-top: 1px solid var(--line); display: grid; gap: 10px; font-size: .95rem; }
.offer li { display: flex; gap: 10px; align-items: flex-start; }
.offer li .tick { margin-top: 4px; }
.offer .btn { margin-top: auto; }
.offers-note { margin-top: 20px; color: var(--slate); font-size: .92rem; text-align: center; }

/* Why */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 4vw, 48px); }
.why { display: grid; gap: 12px; align-content: start; padding-top: 22px; border-top: 3px solid var(--blue); }
.why:nth-child(2) { border-top-color: var(--green); }
.why:nth-child(3) { border-top-color: var(--ink); }
.why p { color: var(--slate); font-size: .98rem; }

/* FAQ */
.faq { background: var(--mist); border-top: 1px solid var(--line); }
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.faq-side { display: grid; gap: 16px; position: sticky; top: calc(var(--header-h) + 24px); }
.faq-list { display: grid; gap: 10px; }
.faq-list details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-m); overflow: hidden; }
.faq-list details[open] { border-color: var(--blue); }
.faq-list summary { list-style: none; cursor: pointer; padding: 18px 20px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: ""; width: 10px; height: 10px; border-right: 2px solid var(--slate); border-bottom: 2px solid var(--slate); transform: rotate(45deg); transition: transform .2s ease; flex: none; margin-right: 4px; }
.faq-list details[open] summary::after { transform: rotate(-135deg); }
.faq-list details p { padding: 0 20px 18px; color: var(--slate); font-size: .96rem; }

/* CTA band */
.cta { padding-block: clamp(56px, 7vw, 96px); background: var(--ink); color: #fff; position: relative; overflow: hidden; }
.cta::before { content: ""; position: absolute; inset: 0; background: radial-gradient(50% 80% at 80% 50%, rgba(39,174,113,.25), transparent 70%), radial-gradient(40% 70% at 15% 40%, rgba(23,97,207,.35), transparent 70%); pointer-events: none; }
.cta .wrap { position: relative; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.cta h2 { color: #fff; }
.cta p { color: #B9C6DA; margin-top: 10px; max-width: 48ch; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: start; }
.contact-copy { display: grid; gap: 20px; }
.contact-meta { display: grid; gap: 10px; color: var(--slate); font-weight: 500; }
.contact-meta a { color: var(--blue); font-weight: 700; }
.form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-l); padding: clamp(20px, 3vw, 32px); display: grid; gap: 16px; box-shadow: 0 30px 60px -40px rgba(15,36,71,.3); }
.field { display: grid; gap: 6px; }
.field label { font-weight: 700; font-size: .92rem; }
.field input, .field select, .field textarea { font: inherit; font-size: 1rem; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: var(--radius-s); background: #fff; color: var(--ink); width: 100%; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px var(--blue-soft); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: #D14343; }
.field .error { color: #B23A3A; font-size: .85rem; font-weight: 600; display: none; }
.field.has-error .error { display: block; }
.field textarea { min-height: 120px; resize: vertical; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { color: var(--slate); font-size: .85rem; }
.form-status { display: none; padding: 14px 16px; border-radius: var(--radius-s); font-weight: 600; }
.form-status.is-success { display: block; background: var(--green-soft); color: var(--green-deep); }
.form-status.is-error { display: block; background: #FDECEC; color: #B23A3A; }
.honeypot { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

/* Footer */
footer { padding: 48px 0 32px; border-top: 1px solid var(--line); }
.foot { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; }
.foot img { height: 30px; width: auto; display: block; }
.foot p { color: var(--slate); font-size: .92rem; max-width: 36ch; margin-top: 14px; }
.foot h4 { font-size: .95rem; margin-bottom: 12px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-weight: 500; color: var(--slate); font-size: .95rem; }
.foot a:hover { color: var(--ink); }
.foot-bottom { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--slate); font-size: .85rem; }
.foot-bottom ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 20px; }

/* Back to top */
.to-top { position: fixed; right: 20px; bottom: 20px; width: 44px; height: 44px; border-radius: 50%; background: #fff; border: 1px solid var(--line); box-shadow: 0 10px 30px -14px rgba(15,36,71,.4); display: grid; place-items: center; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .2s ease; z-index: 40; }
.to-top.is-visible { opacity: 1; pointer-events: auto; }
.to-top svg { width: 18px; height: 18px; stroke: var(--ink); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* Legal page */
.legal { padding-block: clamp(48px, 6vw, 80px); }
.legal .wrap { max-width: 760px; }
.legal h1 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin-bottom: 24px; }
.legal h2 { font-size: 1.3rem; margin: 32px 0 10px; }
.legal p, .legal li { color: var(--slate); }

/* Responsive */
@media (max-width: 1024px) {
  .lifecycle { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .lifecycle::before { display: none; }
  .step, .step + .step { padding: 0; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .offers-grid { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
  .faq-grid { grid-template-columns: 1fr; }
  .faq-side { position: static; }
}
@media (max-width: 860px) {
  .nav-links { display: none; position: absolute; top: var(--header-h); left: calc(-1 * var(--gutter)); right: calc(-1 * var(--gutter)); background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; gap: 0; padding: 8px var(--gutter) 16px; box-shadow: 0 20px 40px -24px rgba(15,36,71,.4); }
  .nav-links li a { display: block; padding: 12px 0; font-size: 1.05rem; color: var(--ink); border-bottom: 0; }
  .nav-links li:last-child { margin-top: 8px; }
  .nav.open .nav-links { display: flex; }
  .burger { display: block; }
  .nav-actions > .btn { display: none; }
  .hero-grid, .care-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 520px; margin-inline: auto; width: 100%; }
  .why-grid { grid-template-columns: 1fr; }
  .care-grid .panel { order: 2; }
  .foot { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .lifecycle { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .row2 { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { width: 100%; }
  .float { font-size: .8rem; padding: 8px 10px; }
  .float.f1 { top: 2%; } .float.f2 { top: 36%; } .float.f3 { bottom: 24%; } .float.f4 { bottom: 4%; right: 0; }
  .log li { grid-template-columns: 34px 1fr; } .log time { grid-column: 2; }
  .cta .btn { width: 100%; }
  .to-top { right: 14px; bottom: 14px; }
}

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