/* Site vitrine WhatIsThis : couleurs de l'app « Noir Signal » (noir profond, rouge lumineux, blanc),
   en version futuriste : grille néon, lignes de balayage, cadre de visée, titres glitch, angles coupés. */
@font-face { font-family: 'Inter Tight'; font-weight: 400; font-display: swap; src: url(/fonts/inter-tight-400.woff2) format('woff2'); }
@font-face { font-family: 'Inter Tight'; font-weight: 600; font-display: swap; src: url(/fonts/inter-tight-600.woff2) format('woff2'); }
@font-face { font-family: 'Inter Tight'; font-weight: 800; font-display: swap; src: url(/fonts/inter-tight-800.woff2) format('woff2'); }
@font-face { font-family: 'Inter Tight'; font-weight: 900; font-display: swap; src: url(/fonts/inter-tight-900.woff2) format('woff2'); }

:root {
  --bg: #07070A;
  --panel: rgba(18, 18, 22, 0.86);
  --border: #2A2A31;
  --text: #F4F4F6;
  --muted: #A3A3AD;
  --faint: #6B6B74;
  --red: #FF2A1F;
  --red-soft: #FF5A4F;
  --red-deep: #C40000;
  --glow: 0 0 18px rgba(255, 42, 31, 0.55);
  --mono: ui-monospace, 'SF Mono', 'JetBrains Mono', Menlo, Consolas, monospace;
  --cut: 16px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: radial-gradient(1000px 600px at 80% -10%, rgba(255, 42, 31, 0.28), transparent 65%), var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  font: 400 17px/1.55 'Inter Tight', system-ui, -apple-system, 'Segoe UI', sans-serif;
  overflow-x: hidden;
}
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
.mono { font-family: var(--mono); letter-spacing: 0.08em; }
.red { color: var(--red); text-shadow: var(--glow); }
.push { margin-left: auto; }

/* Ambiance : sol en grille néon qui défile, lignes de balayage CRT. */
.fx-grid {
  position: fixed; inset: auto -50% -10% -50%; height: 60vh; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 42, 31, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 42, 31, 0.35) 1px, transparent 1px);
  background-size: 64px 64px;
  transform: perspective(420px) rotateX(62deg);
  transform-origin: center top;
  mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent 85%);
  -webkit-mask-image: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent 85%);
  animation: grid-run 3s linear infinite;
  opacity: 0.55;
}
@keyframes grid-run { to { background-position: 0 64px, 0 0; } }
.fx-scan {
  position: fixed; inset: 0; z-index: 50; pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.025) 0 1px, transparent 1px 3px);
  mix-blend-mode: overlay;
}

/* En-tête */
.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 28px;
  padding: 14px max(16px, env(safe-area-inset-left)) 14px max(16px, env(safe-area-inset-right));
  max-width: 1200px; margin: 0 auto;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: rgba(7, 7, 10, 0.62);
  border-bottom: 1px solid rgba(255, 42, 31, 0.18);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 900; letter-spacing: 4px; font-size: 15px; }
.brand.small { font-size: 13px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--red); box-shadow: 0 0 14px var(--red), 0 0 4px #fff inset; }
.caret { color: var(--red); animation: blink 1.1s steps(2, start) infinite; margin-left: -6px; }
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { text-decoration: none; color: var(--muted); font-weight: 600; font-size: 15px; }
.nav a .mono { color: var(--red); font-size: 12px; margin-right: 4px; }
.nav a:hover { color: var(--text); }
.nav + .push { margin-left: 0; }
@media (max-width: 680px) { .nav { display: none; } }

/* Boutons : angles coupés, néon */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  min-height: 54px; padding: 0 28px;
  font-weight: 800; font-size: 17px; text-decoration: none; letter-spacing: -0.1px;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition: transform .15s ease, filter .15s ease, background .15s ease;
}
.btn:active { transform: scale(0.97); }
.btn-red { background: linear-gradient(135deg, #FF4A3D, var(--red-deep)); color: #fff; filter: drop-shadow(0 0 16px rgba(255, 40, 30, 0.55)); }
.btn-red:hover { filter: drop-shadow(0 0 26px rgba(255, 40, 30, 0.85)) brightness(1.08); }
.btn-ghost { background: rgba(255, 255, 255, 0.06); color: var(--text); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22); }
.btn-ghost:hover { background: rgba(255, 42, 31, 0.14); box-shadow: inset 0 0 0 1px var(--red); }
.btn-small { min-height: 40px; padding: 0 18px; font-size: 15px; background: #fff; color: var(--bg); --cut: 10px; }
.btn-small:hover { background: var(--red); color: #fff; }

main { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* Accroche */
.hero { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; padding: 64px 0 72px; }
.kicker { color: var(--red-soft); font-size: 12px; margin: 0 0 22px; }
.blink { animation: blink 1.2s steps(2, start) infinite; }
@keyframes blink { to { visibility: hidden; } }
h1 { font-weight: 900; font-size: clamp(50px, 8.6vw, 104px); line-height: 0.93; letter-spacing: -0.05em; margin: 0 0 26px; }
h1 em { font-style: normal; color: var(--red); text-shadow: 0 0 28px rgba(255, 42, 31, 0.6); }
.lead { color: var(--muted); font-size: clamp(18px, 2.1vw, 21px); max-width: 34em; margin: 0 0 30px; }
.cta { display: flex; flex-wrap: wrap; gap: 14px; }
.fine { color: var(--faint); font-size: 13px; margin: 18px 0 0; }
.center { text-align: center; justify-content: center; }

/* Titre glitch : deux copies décalées (rouge / blanc) qui sautent par moments. */
.glitch { position: relative; display: inline-block; }
.glitch::before, .glitch::after {
  content: attr(data-text); position: absolute; inset: 0; pointer-events: none;
}
.glitch::before { color: #fff; text-shadow: none; animation: glitch-a 4.5s infinite steps(1); opacity: 0.85; }
.glitch::after { color: #00000000; -webkit-text-stroke: 1px var(--red-soft); animation: glitch-b 4.5s infinite steps(1); }
@keyframes glitch-a {
  0%, 86%, 100% { clip-path: inset(100% 0 0 0); transform: none; }
  87% { clip-path: inset(10% 0 62% 0); transform: translate(-5px, 0); }
  89% { clip-path: inset(55% 0 20% 0); transform: translate(6px, 0); }
  91% { clip-path: inset(30% 0 45% 0); transform: translate(-3px, 0); }
  93% { clip-path: inset(100% 0 0 0); }
}
@keyframes glitch-b {
  0%, 87%, 100% { clip-path: inset(100% 0 0 0); transform: none; }
  88% { clip-path: inset(70% 0 5% 0); transform: translate(7px, 1px); }
  90% { clip-path: inset(5% 0 75% 0); transform: translate(-6px, -1px); }
  92% { clip-path: inset(100% 0 0 0); }
}

/* Téléphone dans un cadre de visée */
.hero-phone { display: flex; justify-content: center; }
.hud { position: relative; padding: 28px; }
.corner { position: absolute; width: 34px; height: 34px; border: 3px solid var(--red); filter: drop-shadow(0 0 6px var(--red)); }
.corner.tl { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.corner.tr { top: 0; right: 0; border-left: 0; border-bottom: 0; }
.corner.bl { bottom: 0; left: 0; border-right: 0; border-top: 0; }
.corner.br { bottom: 0; right: 0; border-left: 0; border-top: 0; }
.phone {
  position: relative; overflow: hidden;
  width: min(310px, 72vw); aspect-ratio: 585 / 996; border-radius: 44px; padding: 9px;
  background: linear-gradient(160deg, #2A2A31, #0E0E12);
  box-shadow: 0 0 0 1px #3A3A42, 0 0 60px -10px rgba(255, 42, 31, 0.55), 0 40px 80px -30px #000;
}
.phone img { width: 100%; height: 100%; object-fit: cover; border-radius: 36px; }
.sweep {
  position: absolute; left: 9px; right: 9px; top: 0; height: 90px; border-radius: 36px;
  background: linear-gradient(to bottom, transparent, rgba(255, 42, 31, 0.28) 85%, rgba(255, 120, 110, 0.9));
  box-shadow: 0 2px 14px rgba(255, 42, 31, 0.9);
  animation: sweep 3.6s cubic-bezier(.45, 0, .55, 1) infinite;
}
@keyframes sweep { 0% { transform: translateY(-100px); } 100% { transform: translateY(640px); } }
.tag {
  position: absolute; font-size: 11px; color: #fff; background: rgba(255, 42, 31, 0.9);
  padding: 4px 8px; box-shadow: var(--glow);
}
.tag-a { top: 52px; right: -16px; }
.tag-b { bottom: 70px; left: -20px; background: rgba(7, 7, 10, 0.9); color: var(--red-soft); box-shadow: inset 0 0 0 1px var(--red); }
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; padding-top: 32px; gap: 40px; }
  .tag-a { right: 0; } .tag-b { left: 0; }
}

/* Bandeau défilant */
.ticker {
  overflow: hidden; border-block: 1px solid rgba(255, 42, 31, 0.35);
  background: linear-gradient(90deg, rgba(255, 42, 31, 0.12), rgba(255, 42, 31, 0.03), rgba(255, 42, 31, 0.12));
  margin: 0 -16px; padding: 14px 0;
}
.ticker-track { display: flex; width: max-content; animation: ticker 40s linear infinite; }
.ticker span { font-size: 13px; color: var(--text); padding: 0 22px; white-space: nowrap; }
.ticker span::before { content: '◆'; color: var(--red); margin-right: 22px; text-shadow: var(--glow); }
@keyframes ticker { to { transform: translateX(-50%); } }

/* Sections */
.section { padding: 72px 0 40px; }
.index { color: var(--red); font-size: 12px; margin: 0 0 14px; }
.index::after { content: ''; display: inline-block; width: 80px; height: 1px; background: linear-gradient(90deg, var(--red), transparent); vertical-align: middle; margin-left: 14px; }
h2 { font-weight: 900; font-size: clamp(34px, 5.2vw, 58px); line-height: 1; letter-spacing: -0.04em; margin: 0 0 16px; }
h3 { font-weight: 800; font-size: 21px; letter-spacing: -0.02em; margin: 4px 0 6px; }
.sub { color: var(--muted); font-size: 18px; max-width: 40em; margin: 0 0 32px; }
.code { font-size: 11px; color: var(--red-soft); margin: 16px 0 0; }

/* Cartes à angle coupé avec liseré néon */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 36px; }
.feature, .price, .panel, .faq details {
  position: relative; background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  box-shadow: inset 0 0 0 1px var(--border);
}
.feature { padding: 26px; transition: box-shadow .2s ease, transform .2s ease; }
.feature:hover { box-shadow: inset 0 0 0 1px var(--red), inset 0 0 40px -18px var(--red); transform: translateY(-2px); }
.feature p:last-child { color: var(--muted); margin: 0; font-size: 16px; }
.feature-red { background: linear-gradient(145deg, #FF3A2E, #A80000); box-shadow: none; }
.feature-red:hover { box-shadow: inset 0 0 0 1px #fff; }
.feature-red p:last-child { color: rgba(255, 255, 255, 0.88); }
.feature-red .code { color: rgba(255, 255, 255, 0.8); }
.ficon { width: 46px; height: 46px; padding: 10px; background: rgba(255, 42, 31, 0.13); box-shadow: inset 0 0 0 1px rgba(255, 42, 31, 0.5); fill: none; stroke: var(--red-soft); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-red .ficon { background: rgba(255, 255, 255, 0.18); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5); stroke: #fff; }
@media (max-width: 920px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }

/* Installation */
.tabs { display: inline-flex; gap: 4px; padding: 4px; background: rgba(18, 18, 22, 0.9); box-shadow: inset 0 0 0 1px var(--border); margin-bottom: 18px; flex-wrap: wrap; }
.tabs button {
  font: inherit; font-weight: 800; font-size: 16px; color: var(--muted);
  background: none; border: 0; padding: 10px 20px; min-height: 44px; cursor: pointer;
}
.tabs button:hover { color: var(--text); }
.tabs button[aria-selected="true"] { background: var(--red); color: #fff; box-shadow: var(--glow); }
.install-grid { display: grid; grid-template-columns: 1fr 260px; gap: 24px; align-items: start; }
.panel { padding: 6px 26px; }
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed rgba(255, 255, 255, 0.1); color: var(--muted); }
.steps li:last-child { border-bottom: 0; }
.steps strong { color: var(--text); font-weight: 800; }
.steps a { color: var(--text); text-decoration-color: var(--red); text-underline-offset: 3px; }
.n { flex: 0 0 auto; color: var(--red); font-size: 14px; font-weight: 700; padding-top: 2px; text-shadow: var(--glow); }
.inline { width: 22px; height: 22px; vertical-align: -5px; fill: none; stroke: var(--text); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.qr { text-align: center; }
.qr-frame { position: relative; display: inline-block; padding: 14px; background: #fff; box-shadow: 0 0 0 1px var(--red), 0 0 40px -6px rgba(255, 42, 31, 0.8); }
.qr-label { color: var(--red-soft); font-size: 11px; margin: 14px 0 6px; }
.qr p:last-child { color: var(--muted); font-size: 15px; margin: 0; }
.qr strong { color: var(--text); }
@media (max-width: 880px) { .install-grid { grid-template-columns: 1fr; } }
@media (pointer: coarse) and (max-width: 880px) { .qr { display: none; } }

/* Prix */
.prices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; align-items: stretch; padding-top: 14px; }
.price { padding: 26px; }
.price .code { margin-top: 0; }
.amount { font-weight: 900; font-size: 50px; letter-spacing: -0.045em; margin: 4px 0 0; line-height: 1.1; }
.amount span { font-weight: 600; font-size: 17px; color: var(--muted); letter-spacing: 0; margin-left: 6px; }
.equiv { color: var(--red-soft); font-size: 13px; margin: 4px 0 0; }
.price ul { list-style: none; padding: 0; margin: 20px 0 0; color: var(--muted); }
.price li { padding: 7px 0 7px 26px; position: relative; }
.price li::before { content: '▸'; position: absolute; left: 2px; top: 6px; color: var(--red); text-shadow: var(--glow); }
.price-best {
  background: linear-gradient(180deg, rgba(60, 8, 6, 0.95), rgba(18, 18, 22, 0.92) 70%);
  box-shadow: inset 0 0 0 1.5px var(--red), inset 0 0 60px -20px var(--red);
  transform: translateY(-10px);
}
.badge { display: inline-block; background: var(--red); color: #fff; font-size: 11px; padding: 5px 10px; margin-bottom: 12px; box-shadow: var(--glow); }
@media (max-width: 880px) { .prices { grid-template-columns: 1fr; } .price-best { order: -1; transform: none; } }
#prix .cta { margin-top: 26px; }

/* FAQ */
.faq details { padding: 0 24px; margin-bottom: 10px; max-width: 880px; }
.faq summary { cursor: pointer; font-weight: 800; padding: 19px 0; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '[+]'; font-family: var(--mono); color: var(--red); font-size: 14px; }
.faq details[open] { box-shadow: inset 0 0 0 1px rgba(255, 42, 31, 0.6); }
.faq details[open] summary::after { content: '[−]'; }
.faq details p { color: var(--muted); margin: 0 0 18px; }

/* Pied de page */
.foot { max-width: 1200px; margin: 40px auto 0; padding: 32px 16px calc(32px + env(safe-area-inset-bottom)); display: flex; flex-wrap: wrap; gap: 18px 28px; align-items: center; border-top: 1px solid rgba(255, 42, 31, 0.2); }
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
.foot a { color: var(--faint); text-decoration: none; font-size: 14px; }
.foot a:hover { color: var(--text); }

/* Pages légales */
.legal { max-width: 780px; padding: 40px 16px 64px; }
.legal h1 { font-size: clamp(36px, 6vw, 56px); }
.legal h2 { font-size: 24px; margin-top: 36px; }
.legal p, .legal li { color: var(--muted); }
.legal strong { color: var(--text); }
.legal a { color: var(--text); text-decoration-color: var(--red); }
.todo { background: rgba(255, 196, 0, 0.12); outline: 1px dashed #E0A800; color: #FFD45C; padding: 0 6px; }

/* Mouvements réduits : plus d'animation, l'ambiance reste. */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fx-grid, .ticker-track, .sweep, .glitch::before, .glitch::after, .blink, .caret { animation: none; }
  .sweep { display: none; }
}
.faq details a { color: var(--text); text-decoration-color: var(--red); }