/* ===== Base ===== */
:root {
  --navy: #0c2d48;
  --navy-2: #0a2338;
  --steel: #2f6fae;
  --steel-light: #5b93cc;
  --grey: #f3f6f9;
  --border: #d9e0e8;
  --text: #1f2a37;
  --text-soft: #5a6673;
  --white: #ffffff;
  --wrap: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 32px; }

::selection { background: var(--steel); color: #fff; }

/* ===== Navigation ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.nav__brand {
  font-weight: 700; font-size: 1.1rem; color: var(--navy);
  text-decoration: none; letter-spacing: -0.01em;
}
.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links a {
  color: var(--text-soft); text-decoration: none; font-size: 0.92rem;
  font-weight: 500; transition: color 0.2s;
}
.nav__links a:hover { color: var(--navy); }
.nav__cta {
  background: var(--navy); color: #fff !important;
  padding: 9px 18px; border-radius: 3px;
}
.nav__cta:hover { background: var(--navy-2); }

/* ===== Hero ===== */
.hero {
  background: var(--navy);
  color: #fff;
  padding: 104px 0 92px;
  position: relative;
}
.hero::before {
  content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 100%;
  background: var(--steel);
}
.eyebrow {
  font-size: 0.82rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--steel-light); font-weight: 600; margin-bottom: 26px;
}
.hero__title {
  font-size: clamp(2.2rem, 5.2vw, 3.6rem); font-weight: 600;
  line-height: 1.12; letter-spacing: -0.02em; margin-bottom: 26px;
  max-width: 780px;
}
.hero__intro {
  max-width: 600px; font-size: 1.12rem; color: #c4d2df; margin-bottom: 36px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero__status {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.92rem; color: #9fb3c6;
}
.status-dot {
  width: 9px; height: 9px; border-radius: 50%; background: #3ecf8e;
  display: inline-block;
}

/* ===== Boutons ===== */
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  font-size: 0.98rem; padding: 13px 26px; border-radius: 3px;
  cursor: pointer; border: 1px solid transparent; font-family: inherit;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.btn--accent { background: var(--steel); color: #fff; }
.btn--accent:hover { background: #285f95; }
.btn--outline {
  background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.35);
}
.btn--outline:hover { border-color: #fff; }

/* ===== Sections ===== */
.section { padding: 88px 0; }
.section--grey { background: var(--grey); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.head { margin-bottom: 48px; }
.head__kicker {
  display: block; font-size: 0.8rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--steel); font-weight: 600;
  margin-bottom: 12px;
}
.head__title {
  font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 600;
  color: var(--navy); letter-spacing: -0.01em;
}
.head--light .head__title { color: #fff; }
.head--light .head__kicker { color: var(--steel-light); }

/* ===== Grilles ===== */
.grid { display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white); padding: 32px 28px;
  border-top: 3px solid transparent; transition: border-color 0.2s;
}
.card:hover { border-top-color: var(--steel); }
.card h3 {
  font-size: 1.12rem; font-weight: 600; color: var(--navy); margin-bottom: 12px;
}
.card p { color: var(--text-soft); font-size: 0.98rem; }

/* ===== Approche / étapes ===== */
.step {
  background: var(--grey); padding: 32px 28px;
}
.section--grey .step { background: var(--white); }
.step__num {
  display: block; font-size: 1.4rem; font-weight: 700; color: var(--steel);
  margin-bottom: 14px;
}
.step h3 { font-size: 1.12rem; font-weight: 600; color: var(--navy); margin-bottom: 10px; }
.step p { color: var(--text-soft); font-size: 0.98rem; }

/* ===== Modalités ===== */
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.fact { background: var(--white); padding: 30px 26px; border-top: 3px solid var(--steel); }
.fact h3 { font-size: 1.05rem; font-weight: 600; color: var(--navy); margin-bottom: 12px; }
.fact p { color: var(--text-soft); font-size: 0.96rem; }

/* ===== FAQ ===== */
.faq { border-top: 1px solid var(--border); }
.faq__item { border-bottom: 1px solid var(--border); }
.faq__item summary {
  list-style: none; cursor: pointer; padding: 22px 4px;
  font-weight: 600; color: var(--navy); font-size: 1.08rem;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; color: var(--steel); font-weight: 400; font-size: 1.5rem;
  line-height: 1; transition: transform 0.2s;
}
.faq__item[open] summary::after { content: "\2212"; }
.faq__item p { color: var(--text-soft); font-size: 1rem; padding: 0 4px 24px; max-width: 760px; }

/* ===== Technologies ===== */
.stack { border-top: 1px solid var(--border); }
.stack__row {
  display: grid; grid-template-columns: 240px 1fr; gap: 32px;
  padding: 22px 4px; border-bottom: 1px solid var(--border); align-items: baseline;
}
.stack__row dt { font-weight: 600; color: var(--navy); font-size: 1.05rem; }
.stack__row dd { color: var(--text-soft); font-size: 1.02rem; }

/* ===== Contact ===== */
.contact { background: var(--navy); color: #fff; padding: 88px 0; }
.contact__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start;
}
.contact__intro p { color: #c4d2df; font-size: 1.08rem; margin-bottom: 18px; }
.contact__linkedin a { color: #fff; text-decoration: underline; }

.form { }
.form__row { margin-bottom: 22px; }
.form__row label {
  display: block; font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: #9fb3c6; margin-bottom: 8px; font-weight: 600;
}
.form__row input,
.form__row textarea {
  width: 100%; background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 3px;
  color: #fff; font-family: inherit; font-size: 1rem; padding: 12px 14px;
  resize: vertical; transition: border-color 0.2s, background 0.2s;
}
.form__row input::placeholder,
.form__row textarea::placeholder { color: #7d8fa0; }
.form__row input:focus,
.form__row textarea:focus {
  outline: none; border-color: var(--steel-light); background: rgba(255, 255, 255, 0.1);
}
.hidden { display: none; }

/* ===== Footer ===== */
.footer { background: var(--navy-2); color: #8ea1b3; padding: 24px 0; }
.footer__inner {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 0.86rem;
}

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .grid--3 { grid-template-columns: 1fr 1fr; }
  .contact__grid { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 620px) {
  .wrap { padding: 0 22px; }
  .nav__links { gap: 16px; }
  .nav__links a:not(.nav__cta) { display: none; }
  .grid--3 { grid-template-columns: 1fr; }
  .stack__row { grid-template-columns: 1fr; gap: 6px; }
  .section, .contact { padding: 60px 0; }
  .hero { padding: 72px 0 60px; }
}