/* =========================
   Thèmes via variables CSS
   - défaut: dark
   - industriel clair: industrial
   ========================= */

:root{
  --radius: 18px;
  --shadow: 0 18px 45px rgba(0,0,0,.35);

  /* (fallback) si data-theme absent */
  --bg:#0b1220;
  --panel:#0f1b33;
  --panel2:#0c1730;
  --text:#e9eefc;
  --muted:#a9b6d8;
  --line:rgba(255,255,255,.10);
  --accent:#6ea8ff;
  --accent2:#7ee6c6;
  --btnbg: rgba(255,255,255,.04);
  --btnbgHover: rgba(255,255,255,.07);

  --pageRadial1: rgba(110,168,255,.18);
  --pageRadial2: rgba(126,230,198,.12);
  --pageRadial3: rgba(110,168,255,.10);

  --logoGrad1: rgba(110,168,255,.95);
  --logoGrad2: rgba(126,230,198,.85);

  --iconBg: rgba(110,168,255,.10);
  --iconBorder: rgba(255,255,255,.12);

  --selectBg: rgba(0,0,0,.20);
  --selectText: var(--text);
  --selectBorder: var(--line);
}

/* Thème sombre moderne (actuel) */
html[data-theme="dark"]{
  --bg:#0b1220;
  --panel:#0f1b33;
  --panel2:#0c1730;
  --text:#e9eefc;
  --muted:#a9b6d8;
  --line:rgba(255,255,255,.10);
  --accent:#6ea8ff;
  --accent2:#7ee6c6;
  --shadow: 0 18px 45px rgba(0,0,0,.35);

  --btnbg: rgba(255,255,255,.04);
  --btnbgHover: rgba(255,255,255,.07);

  --pageRadial1: rgba(110,168,255,.18);
  --pageRadial2: rgba(126,230,198,.12);
  --pageRadial3: rgba(110,168,255,.10);

  --logoGrad1: rgba(110,168,255,.95);
  --logoGrad2: rgba(126,230,198,.85);

  --iconBg: rgba(110,168,255,.10);
  --iconBorder: rgba(255,255,255,.12);

  --selectBg: rgba(0,0,0,.20);
  --selectText: var(--text);
  --selectBorder: var(--line);
}

/* Thème industriel clair */
html[data-theme="industrial"]{
  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel2: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --line: rgba(17,24,39,.12);

  /* BTP: orange chantier + bleu ardoise */
  --accent: #f97316;   /* orange */
  --accent2: #1f2937;  /* anthracite */

  --shadow: 0 18px 45px rgba(17,24,39,.12);

  --btnbg: rgba(17,24,39,.04);
  --btnbgHover: rgba(17,24,39,.07);

  /* fond plus discret */
  --pageRadial1: rgba(249,115,22,.14);
  --pageRadial2: rgba(31,41,55,.10);
  --pageRadial3: rgba(249,115,22,.08);

  --logoGrad1: rgba(249,115,22,.95);
  --logoGrad2: rgba(31,41,55,.85);

  --iconBg: rgba(249,115,22,.12);
  --iconBorder: rgba(17,24,39,.14);

  --selectBg: rgba(255,255,255,.90);
  --selectText: var(--text);
  --selectBorder: rgba(17,24,39,.14);
}

/* =========================
   Base
   ========================= */
*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:
    radial-gradient(1000px 600px at 15% 10%, var(--pageRadial1), transparent 55%),
    radial-gradient(900px 500px at 90% 15%, var(--pageRadial2), transparent 55%),
    radial-gradient(900px 700px at 40% 110%, var(--pageRadial3), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.55;
}

a{ color:inherit; text-decoration:none; }
.container{ width:min(1100px, 92vw); margin:0 auto; }

.sr-only{
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}

/* =========================
   Topbar
   ========================= */
.topbar{
  position:sticky; top:0; z-index:20;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
  gap:12px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  letter-spacing:.2px;
}
.logo{
  width:34px; height:34px; border-radius:10px;
  background: linear-gradient(135deg, var(--logoGrad1), var(--logoGrad2));
  box-shadow: 0 10px 25px color-mix(in srgb, var(--accent) 20%, transparent);
}
.brand-name{ font-weight:650; font-size:15px; }
.nav{ display:flex; gap:18px; color:var(--muted); font-size:14px; }
.nav a{ padding:8px 10px; border-radius:10px; }
.nav a:hover{ background: color-mix(in srgb, var(--text) 6%, transparent); color:var(--text); }

.actions{ display:flex; gap:10px; align-items:center; }

/* Select theme */
.select{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--selectBorder);
  background: var(--selectBg);
  color: var(--selectText);
  font-size:14px;
  outline:none;
}
.select:focus{
  border-color: color-mix(in srgb, var(--accent) 55%, var(--selectBorder));
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 14%, transparent);
}

/* =========================
   Buttons
   ========================= */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background: var(--btnbg);
  color:var(--text);
  font-size:14px;
  cursor:pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
  user-select:none;
  white-space:nowrap;
}
.btn:hover{ background: var(--btnbgHover); border-color: color-mix(in srgb, var(--line) 55%, var(--text) 14%); transform: translateY(-1px); }

.btn-primary{
  border:1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, transparent), color-mix(in srgb, var(--accent2) 12%, transparent));
}
.btn-primary:hover{
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
}

/* =========================
   Hero
   ========================= */
.hero{ padding:56px 0 22px; }
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap:26px;
  align-items:stretch;
}
.tag{
  display:inline-flex; align-items:center; gap:10px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 50%, transparent);
  color: var(--muted);
  font-size:13px;
  width:max-content;
}
.tag-dot{
  width:8px; height:8px; border-radius:50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 14%, transparent);
}
h1{
  margin:14px 0 10px;
  font-size: clamp(28px, 4.2vw, 44px);
  line-height:1.12;
  font-weight:750;
  letter-spacing:-.4px;
}
.lead{
  color: var(--muted);
  font-size: clamp(15px, 1.8vw, 18px);
  margin: 0 0 18px;
}
.hero-cta{ display:flex; flex-wrap:wrap; gap:10px; margin-top: 14px; }

.meta-row{
  display:flex; flex-wrap:wrap; gap:10px;
  margin-top: 18px;
  color: var(--muted);
  font-size:13px;
}
.pill{
  border:1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 50%, transparent);
  padding:8px 10px;
  border-radius:999px;
}

/* =========================
   Cards / sections
   ========================= */
.card{
  border:1px solid var(--line);
  background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 80%, transparent), color-mix(in srgb, var(--panel2) 55%, transparent));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-inner{ padding:18px; }

.kpi{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
  margin-top:12px;
}
.kpi .box{
  border:1px solid var(--line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  padding: 14px;
}
.kpi .big{
  font-size: 24px;
  font-weight: 750;
  letter-spacing: -.3px;
}
.kpi .small{
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.divider{ height:1px; background: var(--line); margin:18px 0; }

section{ padding: 30px 0; }
.section-title{
  font-size: 20px;
  font-weight: 720;
  letter-spacing:-.2px;
  margin: 0 0 8px;
}
.section-sub{
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14.5px;
}

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
}
.grid-2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:14px;
}

.feature{
  border:1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  padding:16px;
  min-height: 120px;
}
.feature .title{
  font-weight: 700;
  margin:0 0 6px;
  display:flex;
  align-items:center;
  gap:10px;
}
.icon{
  width:30px; height:30px;
  border-radius: 10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--iconBorder);
  background: var(--iconBg);
  color: var(--text);
  font-size: 14px;
  flex: 0 0 auto;
}
.feature p{ margin:0; color: var(--muted); font-size:14px; }

/* Steps */
.steps{ display:grid; gap:12px; }
.step{
  display:flex; gap:12px;
  border:1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  padding:14px;
  align-items:flex-start;
}
.step-num{
  width:34px; height:34px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border:1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  display:flex; align-items:center; justify-content:center;
  font-weight: 750;
  flex:0 0 auto;
}
.step h3{ margin:0 0 4px; font-size: 15px; font-weight: 700; }
.step p{ margin:0; color: var(--muted); font-size:14px; }

/* Pricing */
.pricing{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:14px;
  align-items:stretch;
}
.price{
  padding:18px;
  border:1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--panel) 55%, transparent);
}
.price .label{ color: var(--muted); font-size: 13px; }
.price .amount{
  font-size: 34px;
  font-weight: 800;
  margin: 6px 0 6px;
  letter-spacing: -.4px;
}
.price ul{ padding-left: 18px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.note{ color: var(--muted); font-size: 13px; margin-top: 10px; }

details{
  border:1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  padding: 14px 16px;
}
details + details{ margin-top: 10px; }
summary{ cursor:pointer; font-weight: 700; list-style:none; }
summary::-webkit-details-marker{ display:none; }
details p{ margin: 10px 0 0; color: var(--muted); font-size: 14px; }

/* Contact */
.contact{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap:14px;
}
.form{ display:grid; gap:10px; }
.input{
  width:100%;
  padding:12px 12px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  color: var(--text);
  outline:none;
  font-size:14px;
}
.input:focus{
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 12%, transparent);
}
textarea.input{ min-height: 110px; resize: vertical; }

.bullets{
  margin:0;
  padding-left:18px;
  color:var(--muted);
  font-size:14px;
}

.fine{ color: var(--muted); font-size:14px; }

/* Footer */
footer{ padding: 26px 0 40px; color: var(--muted); font-size: 13px; }
.footer-row{
  display:flex; flex-wrap:wrap; gap:10px;
  justify-content:space-between; align-items:center;
  border-top:1px solid var(--line);
  padding-top: 18px;
}
.footer-actions{ display:flex; gap:12px; align-items:center; }

/* Responsive */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .pricing{ grid-template-columns: 1fr; }
  .contact{ grid-template-columns: 1fr; }
  .nav{ display:none; }
}