/* ==========================================================================
   Drone Cerdagne — style.css
   Palette : Nuit d'altitude #101C2A · Glacier #F4F7F9 · Roche #46586A
             Balise #FF6B1A · Contour #C6D3DC
   Typo    : Space Grotesk (display) · Inter (texte) · IBM Plex Mono (données)
   ========================================================================== */

:root {
  --night: #101C2A;
  --night-2: #182838;
  --glacier: #F4F7F9;
  --rock: #46586A;
  --beacon: #FF6B1A;
  --beacon-dark: #D9560F;
  --contour: #C6D3DC;
  --white: #FFFFFF;
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --maxw: 1120px;
  --radius: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font-body);
  color: var(--night);
  background: var(--glacier);
  line-height: 1.65;
  font-size: 16.5px;
}

img { max-width: 100%; display: block; }
a { color: var(--beacon-dark); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--beacon); outline-offset: 2px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
header.site {
  position: sticky; top: 0; z-index: 50;
  background: rgba(16, 28, 42, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(198, 211, 220, 0.15);
}
header.site .bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 24px; max-width: var(--maxw); margin: 0 auto;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700;
  color: var(--white); text-decoration: none; font-size: 1.05rem;
  letter-spacing: 0.02em; white-space: nowrap;
}
.brand svg { flex: none; }
.brand .tag { color: var(--contour); font-weight: 400; font-size: 0.72rem; display: block; letter-spacing: 0.14em; text-transform: uppercase; }

nav.main { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
nav.main a {
  color: var(--contour); text-decoration: none; font-size: 0.92rem;
  padding: 7px 11px; border-radius: 6px;
}
nav.main a:hover { color: var(--white); background: rgba(255,255,255,0.08); }
nav.main a.active { color: var(--white); background: rgba(255,107,26,0.18); }
nav.main a.cta {
  background: var(--beacon); color: var(--white); font-weight: 600; margin-left: 6px;
}
nav.main a.cta:hover { background: var(--beacon-dark); }

.lang { display: flex; gap: 2px; margin-left: 10px; border: 1px solid rgba(198,211,220,0.3); border-radius: 6px; overflow: hidden; }
.lang button {
  background: transparent; border: 0; color: var(--contour);
  font-family: var(--font-mono); font-size: 0.75rem; padding: 6px 9px; cursor: pointer;
}
.lang button:hover { background: rgba(255,255,255,0.1); color: var(--white); }
.lang button.on { background: var(--beacon); color: var(--white); }

.navtoggle { display: none; background: none; border: 1px solid rgba(198,211,220,0.35); color: var(--contour); border-radius: 6px; padding: 6px 10px; font-size: 1.1rem; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--night) 0%, var(--night-2) 55%, #1E3448 100%);
  color: var(--white);
}
.hero .topo { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5; }
.hero .inner {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  padding: 88px 24px 84px;
}
.hero .coords {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.12em;
  color: var(--beacon); text-transform: uppercase; margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 4.6vw, 3.4rem); line-height: 1.12; max-width: 18ch;
  margin-bottom: 22px; letter-spacing: -0.01em;
}
.hero p.lead { max-width: 56ch; color: var(--contour); font-size: 1.1rem; margin-bottom: 34px; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  font-family: var(--font-display); font-size: 0.98rem;
  padding: 13px 26px; border-radius: 8px; border: 2px solid transparent;
}
.btn.primary { background: var(--beacon); color: var(--white); }
.btn.primary:hover { background: var(--beacon-dark); }
.btn.ghost { border-color: rgba(198,211,220,0.5); color: var(--white); }
.btn.ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.06); }
.btn.dark { background: var(--night); color: var(--white); }
.btn.dark:hover { background: var(--night-2); }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.tight { padding: 52px 0; }
.eyebrow {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--beacon-dark); margin-bottom: 12px;
}
h2 {
  font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.2; margin-bottom: 18px; letter-spacing: -0.01em;
}
h3 { font-family: var(--font-display); font-size: 1.15rem; margin-bottom: 8px; }
.sub { color: var(--rock); max-width: 62ch; }

/* Cards grid */
.grid { display: grid; gap: 22px; margin-top: 40px; }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--white); border: 1px solid #E2E9EE; border-radius: var(--radius);
  overflow: hidden; text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
a.card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(16,28,42,0.12); }
.card .media { aspect-ratio: 16/10; position: relative; background: linear-gradient(135deg, #21374C, #3A5570); overflow: hidden; }
.card .media img { width: 100%; height: 100%; object-fit: cover; }
.card .media .mediatag {
  position: absolute; left: 10px; bottom: 10px;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em;
  background: rgba(16,28,42,0.82); color: var(--contour);
  padding: 4px 9px; border-radius: 4px; text-transform: uppercase;
}
.card .body { padding: 20px 22px 24px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card .body p { color: var(--rock); font-size: 0.94rem; flex: 1; }
.card .more { font-family: var(--font-mono); font-size: 0.78rem; color: var(--beacon-dark); letter-spacing: 0.06em; }

/* Sector tiles */
.sector {
  background: var(--white); border: 1px solid #E2E9EE; border-radius: var(--radius);
  padding: 26px 24px;
}
.sector .ic {
  width: 46px; height: 46px; border-radius: 9px; display: grid; place-items: center;
  background: rgba(255,107,26,0.1); color: var(--beacon-dark); margin-bottom: 14px;
}
.sector p { color: var(--rock); font-size: 0.93rem; }

/* Steps */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 40px; }
.step { position: relative; padding-top: 8px; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--beacon-dark);
  display: block; margin-bottom: 10px; letter-spacing: 0.1em;
}
.step h3 { font-size: 1.02rem; }
.step p { color: var(--rock); font-size: 0.9rem; }

/* Dark band / fiche technique */
.band { background: var(--night); color: var(--white); }
.band h2 { color: var(--white); }
.band .sub { color: var(--contour); }
.spec {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(198,211,220,0.18); border: 1px solid rgba(198,211,220,0.18);
  border-radius: var(--radius); overflow: hidden; margin-top: 38px;
}
.spec > div { background: var(--night-2); padding: 22px 20px; }
.spec .k {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--contour); margin-bottom: 8px;
}
.spec .v { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--white); line-height: 1.25; }
.spec .u { font-size: 0.82rem; color: var(--contour); margin-top: 4px; }

/* Split section (texte + image) */
.split { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; }
.split.rev { direction: rtl; }
.split.rev > * { direction: ltr; }
figure.media {
  border-radius: var(--radius); overflow: hidden; position: relative;
  background: linear-gradient(135deg, #21374C, #3A5570);
  border: 1px solid #E2E9EE; min-height: 280px;
}
figure.media img { width: 100%; height: 100%; object-fit: cover; min-height: 280px; }
figure.media figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  font-family: var(--font-mono); font-size: 0.68rem;
  background: linear-gradient(transparent, rgba(16,28,42,0.85));
  color: var(--contour); padding: 26px 12px 9px;
}
figure.media figcaption a { color: var(--contour); }
img.failed { display: none; }

/* Checklist */
ul.check { list-style: none; margin-top: 18px; display: grid; gap: 10px; }
ul.check li { padding-left: 30px; position: relative; color: var(--rock); }
ul.check li::before {
  content: ""; position: absolute; left: 0; top: 5px; width: 16px; height: 16px;
  border-radius: 50%; background: rgba(255,107,26,0.14);
  border: 2px solid var(--beacon); 
}
ul.check li strong { color: var(--night); }

/* Notice (activité en lancement) */
.notice {
  margin-top: 34px; border-left: 4px solid var(--beacon);
  background: var(--white); border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px; color: var(--rock); font-size: 0.95rem;
}

/* CTA band */
.ctaband { background: linear-gradient(135deg, var(--beacon), #FF8A3D); color: var(--white); }
.ctaband .inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.ctaband h2 { color: var(--white); margin-bottom: 6px; }
.ctaband p { opacity: 0.92; }

/* Page hero (sous-pages) */
.pagehero { background: linear-gradient(160deg, var(--night), var(--night-2)); color: var(--white); position: relative; overflow: hidden; }
.pagehero .inner { position: relative; max-width: var(--maxw); margin: 0 auto; padding: 64px 24px 58px; }
.pagehero .coords { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; color: var(--beacon); text-transform: uppercase; margin-bottom: 14px; }
.pagehero h1 { font-family: var(--font-display); font-size: clamp(1.8rem, 3.8vw, 2.8rem); line-height: 1.15; max-width: 22ch; margin-bottom: 16px; }
.pagehero p { max-width: 58ch; color: var(--contour); font-size: 1.05rem; }
.pagehero .topo { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.35; }

/* Applications list */
.apps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 36px; }
.app { background: var(--white); border: 1px solid #E2E9EE; border-radius: var(--radius); padding: 22px 24px; }
.app h3 { font-size: 1.02rem; }
.app p { color: var(--rock); font-size: 0.92rem; }
.app .sect {
  display: inline-block; font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--beacon-dark);
  background: rgba(255,107,26,0.09); padding: 3px 8px; border-radius: 4px; margin-bottom: 10px;
}

/* Contact */
.contactgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; margin-top: 36px; }
.cinfo .row { display: flex; gap: 14px; margin-bottom: 22px; align-items: flex-start; }
.cinfo .row .ic { flex: none; width: 40px; height: 40px; border-radius: 8px; display: grid; place-items: center; background: rgba(255,107,26,0.1); color: var(--beacon-dark); }
.cinfo .row .k { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--rock); }
.cinfo .row .v { font-weight: 600; }
form.contact { background: var(--white); border: 1px solid #E2E9EE; border-radius: var(--radius); padding: 28px; display: grid; gap: 16px; }
form.contact label { font-size: 0.85rem; font-weight: 600; display: grid; gap: 6px; }
form.contact input, form.contact select, form.contact textarea {
  font-family: var(--font-body); font-size: 0.95rem; padding: 11px 12px;
  border: 1px solid #CBD6DE; border-radius: 7px; background: var(--glacier); width: 100%;
}
form.contact input:focus, form.contact select:focus, form.contact textarea:focus { outline: 2px solid var(--beacon); border-color: var(--beacon); }
form.contact textarea { min-height: 130px; resize: vertical; }
form.contact button { border: 0; cursor: pointer; }

/* Footer */
footer.site { background: var(--night); color: var(--contour); padding: 54px 0 30px; }
footer.site .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
footer.site h4 { font-family: var(--font-display); color: var(--white); margin-bottom: 14px; font-size: 0.98rem; }
footer.site a { color: var(--contour); text-decoration: none; }
footer.site a:hover { color: var(--white); text-decoration: underline; }
footer.site ul { list-style: none; display: grid; gap: 8px; font-size: 0.92rem; }
footer.site .legal {
  border-top: 1px solid rgba(198,211,220,0.15); margin-top: 40px; padding-top: 22px;
  font-size: 0.8rem; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--font-mono);
}
footer.site .desc { font-size: 0.9rem; max-width: 40ch; }

/* Legal page */
.prose { max-width: 760px; }
.prose h2 { font-size: 1.3rem; margin-top: 36px; }
.prose p { margin-bottom: 14px; color: var(--rock); }
mark.todo { background: #FFE7A8; padding: 1px 5px; border-radius: 3px; font-family: var(--font-mono); font-size: 0.85em; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid.c4 { grid-template-columns: repeat(2, 1fr); }
  .grid.c3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .spec { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 28px; }
  footer.site .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .navtoggle { display: block; }
  nav.main {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--night); flex-direction: column; align-items: stretch;
    padding: 12px 18px 18px; border-bottom: 1px solid rgba(198,211,220,0.2);
  }
  nav.main.open { display: flex; }
  nav.main a { padding: 12px; }
  .lang { margin: 10px 0 0; align-self: flex-start; }
  .grid.c4, .grid.c3, .grid.c2, .apps, .contactgrid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .spec { grid-template-columns: 1fr; }
  .hero .inner { padding: 60px 24px; }
  footer.site .cols { grid-template-columns: 1fr; }
}