/* ============================================================
   AT Systèmes — Feuille de styles commune
   ============================================================ */

:root {
  --bg:        #0b1020;
  --bg-2:      #0f162e;
  --surface:   #131c38;
  --surface-2: #1a2647;
  --border:    #263153;
  --text:      #e8ecf6;
  --muted:     #9aa6c4;
  --primary:   #4f7cff;
  --primary-2: #6d93ff;
  --accent:    #22d3ee;
  --accent-2:  #34e2b0;
  --chrono:    #22d3ee;
  --nuntivo:   #a855f7;
  --radius:    16px;
  --radius-sm: 10px;
  --shadow:    0 20px 60px -20px rgba(0,0,0,.6);
  --maxw:      1160px;
  --font:      "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(79,124,255,.18), transparent 60%),
    radial-gradient(900px 500px at 0% 10%, rgba(34,211,238,.12), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-2); text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* -------------------- Header / Nav -------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(11,16,32,.72);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -.02em;
  color: var(--text);
}
.brand:hover { color: var(--text); }

.brand-mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid; place-items: center;
  font-weight: 900; color: #05122b;
  box-shadow: 0 6px 20px -6px rgba(79,124,255,.7);
}
.brand span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 500;
  font-size: .95rem;
  transition: .18s;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }

.nav-toggle { display: none; background: none; border: 0; color: var(--text); font-size: 1.6rem; cursor: pointer; }

/* -------------------- Buttons -------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: 12px;
  font-weight: 600;
  font-size: .98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s, background .15s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  box-shadow: 0 12px 30px -12px rgba(79,124,255,.8);
}
.btn-primary:hover { color: #fff; box-shadow: 0 18px 40px -14px rgba(79,124,255,.9); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { color: var(--text); border-color: var(--primary); }
.btn-lg { padding: 16px 30px; font-size: 1.05rem; }

/* -------------------- Hero -------------------- */

.hero { padding: 90px 0 70px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(34,211,238,.1);
  border: 1px solid rgba(34,211,238,.25);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 22px;
}
h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.03em;
  margin: 0 0 20px;
  font-weight: 800;
}
.gradient-text {
  background: linear-gradient(120deg, var(--primary-2), var(--accent) 60%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lead {
  font-size: 1.18rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 0 32px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.code-window { font-family: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace; font-size: .86rem; }
.code-dots { display: flex; gap: 7px; margin-bottom: 18px; }
.code-dots i { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.code-dots i:nth-child(1){ background:#ff5f57; }
.code-dots i:nth-child(2){ background:#febc2e; }
.code-dots i:nth-child(3){ background:#28c840; }
.code-line { color: var(--muted); margin: 6px 0; }
.code-line .k { color: var(--accent); }
.code-line .s { color: var(--accent-2); }
.code-line .c { color: #5b6788; }

/* -------------------- Sections -------------------- */

section { padding: 72px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  letter-spacing: -.02em;
  margin: 0 0 14px;
  font-weight: 800;
}
.section-head p { color: var(--muted); font-size: 1.1rem; margin: 0; }
.kicker {
  font-size: .82rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--primary-2); margin-bottom: 10px;
}

/* -------------------- Feature grid -------------------- */

.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); border-color: var(--primary); }
.card .ico {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 1.5rem;
  background: rgba(79,124,255,.14);
  border: 1px solid rgba(79,124,255,.3);
  margin-bottom: 18px;
}
.card h3 { margin: 0 0 10px; font-size: 1.22rem; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--muted); }

/* -------------------- Product blocks -------------------- */

.product {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: linear-gradient(160deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 48px;
  margin-bottom: 32px;
}
.product.reverse .product-media { order: 2; }
.product-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: .85rem;
  padding: 6px 14px; border-radius: 100px; margin-bottom: 16px;
}
.badge-chrono { color: var(--chrono); background: rgba(34,211,238,.12); border: 1px solid rgba(34,211,238,.3); }
.badge-nuntivo { color: var(--nuntivo); background: rgba(168,85,247,.12); border: 1px solid rgba(168,85,247,.3); }
.product h3 { font-size: 1.9rem; margin: 0 0 14px; letter-spacing: -.02em; }
.product p { color: var(--muted); font-size: 1.05rem; margin: 0 0 22px; }
.product ul { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 10px; }
.product li { padding-left: 30px; position: relative; color: var(--text); }
.product li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--accent-2); font-weight: 800;
}
.product-media {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 30px;
  min-height: 260px;
  display: grid; place-items: center;
  position: relative;
  overflow: hidden;
}
.mockup {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--surface-2), var(--bg-2));
  padding: 20px;
}
.mockup .bar { height: 10px; border-radius: 5px; background: var(--surface); margin: 9px 0; }
.mockup .bar.w1{width:70%} .mockup .bar.w2{width:90%} .mockup .bar.w3{width:55%}
.mockup .chip { display:inline-block; padding:6px 12px; border-radius:8px; font-size:.8rem; font-weight:600; margin: 4px 4px 0 0; }

/* -------------------- Stats -------------------- */

.stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.stat { text-align: center; padding: 28px 16px; }
.stat .num {
  font-size: 2.6rem; font-weight: 800; letter-spacing: -.03em;
  background: linear-gradient(120deg, var(--primary-2), var(--accent));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.stat .lbl { color: var(--muted); font-size: .95rem; margin-top: 6px; }

/* -------------------- Process -------------------- */

.steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; counter-reset: step; }
.step { position: relative; padding-top: 8px; }
.step .n {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 800; font-size: 1.1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #05122b; margin-bottom: 16px;
}
.step h4 { margin: 0 0 8px; font-size: 1.15rem; }
.step p { margin: 0; color: var(--muted); font-size: .96rem; }

/* -------------------- CTA band -------------------- */

.cta-band {
  background: linear-gradient(135deg, rgba(79,124,255,.18), rgba(34,211,238,.12));
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 56px 40px;
  text-align: center;
}
.cta-band h2 { font-size: clamp(1.8rem,3vw,2.4rem); margin: 0 0 14px; letter-spacing: -.02em; }
.cta-band p { color: var(--muted); font-size: 1.1rem; margin: 0 0 28px; }

/* -------------------- Contact -------------------- */

.contact-grid { display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-info li { list-style:none; margin-bottom: 18px; color: var(--muted); }
.contact-info strong { color: var(--text); display:block; }
.form-row { margin-bottom: 16px; }
.form-row label { display:block; font-size:.9rem; font-weight:600; margin-bottom:6px; }
.form-row input, .form-row textarea {
  width: 100%; padding: 13px 15px; border-radius: 10px;
  background: var(--bg); border: 1px solid var(--border); color: var(--text);
  font-family: inherit; font-size: .98rem;
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--primary); border-color: transparent; }

/* -------------------- Footer -------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  margin-top: 40px;
  background: var(--bg-2);
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-grid h5 { font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 16px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--muted); font-size: .95rem; }
.footer-grid a:hover { color: var(--accent); }
.footer-about p { color: var(--muted); font-size: .95rem; max-width: 300px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  color: var(--muted); font-size: .88rem;
}

/* -------------------- Breadcrumb -------------------- */
.breadcrumb { padding: 24px 0 0; font-size: .9rem; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }

/* -------------------- Responsive -------------------- */

@media (max-width: 900px) {
  .hero-grid, .product, .contact-grid { grid-template-columns: 1fr; }
  .product.reverse .product-media { order: 0; }
  .grid-3, .grid-2, .stats, .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--bg-2); border-bottom: 1px solid var(--border);
    padding: 12px; gap: 4px; display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}
@media (max-width: 560px) {
  .grid-3, .grid-2, .stats, .steps, .footer-grid { grid-template-columns: 1fr; }
  .product { padding: 28px; }
  section { padding: 52px 0; }
}