/* ==========================================================================
   OPEN MARINE — UI KIT WEB
   Brand book « L'OPEN MARITIME » : ingénierie de pointe, rigueur, technologie.
   Angles droits · cyan de contrôle · grille de construction · équerres de visée
   ========================================================================== */

:root {
  /* ---------------------------------------------------- 1. Palette */
  --color-bg-abyss: #040B16;   /* fond général */
  --color-bg-card:  #0A1931;   /* sections et cartes */
  --color-cyan-glow: #00E5FF;  /* accents, actions, séparateurs */
  --color-text-main: #FFFFFF;
  --color-text-muted: #8A9BB3;

  /* Déclinaisons dérivées de la palette */
  --c-cyan: var(--color-cyan-glow);
  --c-cyan-dim: rgba(0, 229, 255, .14);
  --c-cyan-line: rgba(0, 229, 255, .22);
  --c-line: rgba(138, 155, 179, .16);
  --c-grid: rgba(0, 229, 255, .05);
  --c-abyss-veil: rgba(4, 11, 22, .45);

  /* ---------------------------------------------------- 2. Typographie */
  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;

  /* ---------------------------------------------------- 3. Structure */
  --wrap: 1200px;
  --radius: 0px;              /* précision industrielle : aucun arrondi */
  --hairline: 1px;
  --corner-l: 14px;           /* longueur des équerres */
  --glow: 0 0 10px rgba(0, 229, 255, .30);
  --glow-strong: 0 0 18px rgba(0, 229, 255, .45);
  --grid-step: 48px;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--color-bg-abyss);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------------------------------------------------- Titres institutionnels */
h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--color-text-main);
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.06;
}
h1 { font-size: clamp(2.6rem, 7.2vw, 5.6rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.6vw, 2.55rem); font-weight: 700; }
h3 { font-size: 1.16rem; font-weight: 600; letter-spacing: .9px; }

p { margin: 0; }
a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--c-cyan); }
abbr { text-decoration: underline dotted; text-underline-offset: 3px; cursor: help; }
::selection { background: var(--c-cyan); color: var(--color-bg-abyss); }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.wrap--narrow { max-width: 820px; }

.hl { color: var(--c-cyan); text-shadow: var(--glow); }

/* ==================================================== ÉQUERRES / VISEURS
   Quatre équerres en L dessinées en dégradés, aux angles exacts du bloc. */
.corners { position: relative; }

.corners::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  --l: var(--corner-l);
  --t: var(--hairline);
  --c: var(--c-cyan);
  background:
    /* haut gauche  ⌐ */
    linear-gradient(var(--c) 0 0) 0 0    / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 0 0    / var(--t) var(--l) no-repeat,
    /* haut droit   ¬ */
    linear-gradient(var(--c) 0 0) 100% 0 / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 0 / var(--t) var(--l) no-repeat,
    /* bas gauche   L */
    linear-gradient(var(--c) 0 0) 0 100% / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 0 100% / var(--t) var(--l) no-repeat,
    /* bas droit    ⌡ */
    linear-gradient(var(--c) 0 0) 100% 100% / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 100% / var(--t) var(--l) no-repeat;
}

/* =========================================================== BANDEAU SYSTÈME */
.sysbar {
  border-bottom: var(--hairline) solid var(--c-line);
  background: var(--color-bg-abyss);
}
.sysbar__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  min-height: 34px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  color: rgba(138, 155, 179, .75);
}
.sysbar__item { display: inline-flex; align-items: center; gap: .5rem; white-space: nowrap; }
.sysbar__item:last-child { margin-left: auto; color: var(--c-cyan); }

.dot {
  width: 6px; height: 6px;
  flex: none;
  background: var(--c-cyan);
  box-shadow: var(--glow);
  animation: blink 2.4s steps(1, end) infinite;
}
@keyframes blink { 0%, 62% { opacity: 1; } 63%, 100% { opacity: .18; } }

/* ================================================================ BOUTONS
   Ghost : bordure cyan, texte cyan → au survol, remplissage cyan. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6rem;
  padding: .95rem 1.7rem;
  border: var(--hairline) solid var(--c-cyan);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-cyan);
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .18s ease, color .18s ease,
              box-shadow .18s ease, transform .18s ease;
}
.btn:hover,
.btn:focus-visible {
  background-color: var(--c-cyan);
  color: var(--color-bg-abyss);
  box-shadow: var(--glow);
  outline: none;
}
.btn:active { transform: translateY(1px); }

/* Variante pleine (action principale) — inverse du ghost */
.btn--solid {
  background-color: var(--c-cyan);
  color: var(--color-bg-abyss);
  box-shadow: var(--glow);
}
.btn--solid:hover,
.btn--solid:focus-visible {
  background-color: transparent;
  color: var(--c-cyan);
}

.link {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-cyan);
  border-bottom: var(--hairline) solid var(--c-cyan-line);
  padding-bottom: .2rem;
  transition: box-shadow .18s ease, border-color .18s ease;
}
.link:hover { border-color: var(--c-cyan); box-shadow: var(--glow); }

/* ============================================================== NAVIGATION */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(4, 11, 22, .86);
  backdrop-filter: blur(12px) saturate(140%);
  border-bottom: var(--hairline) solid var(--c-cyan-line);
}
.nav__inner { display: flex; align-items: center; gap: 2rem; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: .7rem; }
.brand__mark { width: 19px; height: 19px; flex: none; color: var(--c-cyan); filter: drop-shadow(0 0 6px rgba(0,229,255,.5)); }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 500;
  letter-spacing: 2.4px;
  text-transform: uppercase;
  color: var(--color-text-main);
}
.brand__name b { font-weight: 700; color: var(--c-cyan); }
.brand--sm .brand__name { font-size: .95rem; }

.nav__links {
  display: flex;
  gap: 2rem;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.nav__links a { position: relative; color: var(--color-text-muted); padding: .4rem 0; transition: color .18s ease; }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: var(--hairline);
  background: var(--c-cyan);
  box-shadow: var(--glow);
  transition: width .22s ease;
}
.nav__links a:hover { color: var(--color-text-main); }
.nav__links a:hover::after { width: 100%; }

.nav__cta { padding: .58rem 1.15rem; font-size: .7rem; }

/* =================================================================== HERO */
.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  min-height: 100vh;
  min-height: 100svh;
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(5rem, 10vw, 8rem);
  overflow: hidden;

  /* Fond : visuel d'ingénierie + voile assombrissant (technique brand book).
     AVIF puis WebP servis aux navigateurs modernes, JPEG en repli. */
  background-image: url('hero.jpeg');
  background-image: -webkit-image-set(
    url('hero.avif') type('image/avif'),
    url('hero.webp') type('image/webp'),
    url('hero.jpeg') type('image/jpeg')
  );
  background-image: image-set(
    url('hero.avif') type('image/avif'),
    url('hero.webp') type('image/webp'),
    url('hero.jpeg') type('image/jpeg')
  );
  background-size: cover;
  background-position: center;
  box-shadow: inset 0 0 0 1000px rgba(4, 11, 22, 0.42);
}

/* Dégradé de raccord vers les fonds abyssaux */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(115% 85% at 80% 5%, rgba(0, 229, 255, .13), transparent 58%),
    linear-gradient(180deg, rgba(4, 11, 22, .70) 0%, rgba(4, 11, 22, .34) 42%, var(--color-bg-abyss) 100%);
}

/* Équerres de visée plein cadre */
.hero::before {
  content: "";
  position: absolute;
  inset: 22px;
  z-index: 3;
  pointer-events: none;
  --l: 30px;
  --t: var(--hairline);
  --c: var(--c-cyan);
  background:
    linear-gradient(var(--c) 0 0) 0 0    / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 0 0    / var(--t) var(--l) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 0 / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 0 / var(--t) var(--l) no-repeat,
    linear-gradient(var(--c) 0 0) 0 100% / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 0 100% / var(--t) var(--l) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 100% / var(--l) var(--t) no-repeat,
    linear-gradient(var(--c) 0 0) 100% 100% / var(--t) var(--l) no-repeat;
  opacity: .75;
}

/* Grille de construction, opacité ~5 % */
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--c-grid) var(--hairline), transparent var(--hairline)),
    linear-gradient(90deg, var(--c-grid) var(--hairline), transparent var(--hairline));
  background-size: var(--grid-step) var(--grid-step);
  mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30%, #000 70%, transparent);
}

.hero__inner { position: relative; z-index: 2; max-width: 900px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  padding: .5rem .95rem;
  margin-bottom: 2rem;
  border: var(--hairline) solid var(--c-cyan-line);
  background: rgba(4, 11, 22, .55);
  backdrop-filter: blur(6px);
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  color: var(--color-text-muted);
}

.hero h1 { text-shadow: 0 2px 40px rgba(4, 11, 22, .85); }

.lead {
  margin-top: 1.6rem;
  max-width: 58ch;
  color: #B9C7D6;
  font-size: clamp(1rem, 1.6vw, 1.13rem);
  font-weight: 300;
  text-shadow: 0 1px 18px rgba(4, 11, 22, .9);
}

.hero__actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 2.4rem; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.4rem;
  margin: 3.6rem 0 0;
  padding: 1.7rem 0 0;
  border-top: var(--hairline) solid var(--c-cyan-line);
  list-style: none;
}
.stats li {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding-left: 1rem;
  border-left: var(--hairline) solid var(--c-cyan-line);
}
.stats strong {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-main);
}
.stats span {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .14em;
  color: var(--color-text-muted);
  opacity: .85;
}

.hero__caption {
  position: absolute;
  left: 28px;
  bottom: 18px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(138, 155, 179, .6);
}

/* =============================================================== SECTIONS */
.section {
  padding: clamp(4.5rem, 9vw, 7.5rem) 0;
  border-top: var(--hairline) solid var(--c-line);
}

.section--alt {
  background-color: var(--color-bg-abyss);
  background-image:
    linear-gradient(var(--c-grid) var(--hairline), transparent var(--hairline)),
    linear-gradient(90deg, var(--c-grid) var(--hairline), transparent var(--hairline));
  background-size: var(--grid-step) var(--grid-step);
}

.section__head { max-width: 660px; margin-bottom: 3.4rem; }
.section__sub { margin-top: 1.1rem; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin-bottom: 1.1rem;
}
.eyebrow--center { text-align: center; }

/* ============================================================== CARTES */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: var(--hairline);
  background: var(--c-line);
  border: var(--hairline) solid var(--c-line);
}
.card {
  position: relative;
  padding: 2rem 1.7rem 1.7rem;
  background-color: var(--color-bg-card);
  transition: background-color .2s ease, box-shadow .2s ease;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: var(--hairline);
  background: var(--c-cyan);
  box-shadow: var(--glow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}
.card:hover { background-color: #0D2140; }
.card:hover::after { transform: scaleX(1); }
.card:hover .card__icon { box-shadow: var(--glow); }

.card__icon {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 1.3rem;
  border: var(--hairline) solid var(--c-cyan-line);
  background: var(--c-cyan-dim);
  color: var(--c-cyan);
  transition: box-shadow .2s ease;
}
.card__icon svg { width: 22px; height: 22px; }
.card p { margin-top: .7rem; font-size: .93rem; }

.tag {
  display: inline-block;
  margin-top: 1.3rem;
  padding: .28rem .6rem;
  border: var(--hairline) solid var(--c-line);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .12em;
  color: var(--color-text-muted);
}

/* =============================================================== SPLIT */
.split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split__text > p { margin-top: 1.1rem; }

.checklist {
  list-style: none;
  margin: 2rem 0 2.4rem;
  padding: 0;
  display: grid;
  gap: var(--hairline);
  background: var(--c-line);
  border-block: var(--hairline) solid var(--c-line);
}
.checklist li {
  position: relative;
  padding: .75rem .9rem .75rem 2.4rem;
  background-color: var(--color-bg-abyss);
  font-size: .93rem;
  color: #B9C7D6;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 1rem; top: .95em;
  width: 11px; height: 6px;
  border-left: var(--hairline) solid var(--c-cyan);
  border-bottom: var(--hairline) solid var(--c-cyan);
  transform: rotate(-45deg);
}

/* Console / terminaux */
.code {
  border: var(--hairline) solid var(--c-cyan-line);
  background-color: #02070F;
  box-shadow: 0 0 30px -10px rgba(0, 229, 255, .25);
}
.code__bar {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .7rem .95rem;
  border-bottom: var(--hairline) solid var(--c-line);
  background-color: var(--color-bg-card);
}
.code__bar span { width: 8px; height: 8px; background: var(--c-cyan-dim); border: var(--hairline) solid var(--c-cyan-line); }
.code__bar span:first-child { background: var(--c-cyan); }
.code__bar em {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .62rem;
  font-style: normal;
  letter-spacing: .12em;
  color: var(--color-text-muted);
}
.code pre {
  margin: 0;
  padding: 1.3rem 1.3rem 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.95;
}
.code code { color: #C3D3E2; }
.c-dim { color: rgba(138, 155, 179, .65); }
.c-str { color: #9AE6B4; }
.c-key { color: var(--c-cyan); }
.c-flag { color: #C4B5FD; }
.c-ok { color: var(--c-cyan); text-shadow: var(--glow); }

/* =============================================================== ÉTAPES */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--hairline);
  background: var(--c-line);
  border: var(--hairline) solid var(--c-line);
}
.step {
  padding: 2rem 1.7rem;
  background-color: var(--color-bg-card);
  transition: background-color .2s ease, box-shadow .2s ease;
}
.step:hover { background-color: #0D2140; box-shadow: inset 0 0 0 var(--hairline) var(--c-cyan-line), var(--glow); }
.step__num {
  display: block;
  margin-bottom: 1.2rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: transparent;
  -webkit-text-stroke: var(--hairline) var(--c-cyan);
}
.step p { margin-top: .7rem; font-size: .93rem; }

/* ================================================================== FAQ */
details {
  border-bottom: var(--hairline) solid var(--c-line);
  padding: 1.25rem 0;
}
details:first-of-type { border-top: var(--hairline) solid var(--c-line); }
summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: var(--color-text-main);
  transition: color .18s ease;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--c-cyan);
  transition: transform .2s ease;
}
details[open] summary::after { transform: rotate(45deg); }
summary:hover { color: var(--c-cyan); }
details p { margin-top: .85rem; font-size: .93rem; max-width: 70ch; }

/* ================================================================== CTA */
.cta {
  padding: clamp(4rem, 8vw, 6.5rem) 0;
  border-top: var(--hairline) solid var(--c-cyan-line);
  background-color: var(--color-bg-abyss);
  background-image:
    linear-gradient(var(--c-grid) var(--hairline), transparent var(--hairline)),
    linear-gradient(90deg, var(--c-grid) var(--hairline), transparent var(--hairline));
  background-size: var(--grid-step) var(--grid-step);
  text-align: center;
}
.cta__inner {
  max-width: 660px;
  margin: 0 auto;
  display: grid;
  gap: 1.1rem;
  justify-items: center;
}
.cta p { color: var(--color-text-muted); }
.cta__actions { display: flex; flex-wrap: wrap; gap: .9rem; justify-content: center; margin-top: .8rem; }

/* =============================================================== FOOTER */
.foot {
  padding: 2.6rem 0;
  border-top: var(--hairline) solid var(--c-line);
  background-color: var(--color-bg-card);
}
.foot__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
}
.foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.foot__links a { transition: color .18s ease; }
.foot__links a:hover { color: var(--c-cyan); text-shadow: var(--glow); }
.foot__legal {
  flex-basis: 100%;
  padding-top: 1.2rem;
  border-top: var(--hairline) solid var(--c-line);
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .12em;
  color: rgba(138, 155, 179, .8);
}

/* ============================================================== RÉVÉLATION */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-in { opacity: 1; transform: none; }

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

/* ============================================================ RESPONSIVE */
@media (max-width: 980px) {
  .split { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); row-gap: 1.8rem; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .wrap { padding: 0 20px; }
  .nav__inner { height: 64px; gap: 1rem; }
  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
  .sysbar__item--hide { display: none; }
  .sysbar__inner { justify-content: space-between; gap: 1rem; }

  .hero { min-height: auto; padding: 4rem 0 4.5rem; }
  .hero::before { inset: 12px; --l: 20px; }
  .hero__caption { display: none; }
  .hero__actions .btn { flex: 1 1 auto; }
  .stats { margin-top: 2.8rem; }

  .foot__inner { flex-direction: column; align-items: flex-start; }
  .foot__links { gap: 1.1rem; }
}

@media (max-width: 400px) {
  h1 { font-size: 2.3rem; letter-spacing: .5px; }
}