/* ==========================================================================
   DEMARE AI — Feuille de style
   Thème sombre, futuriste. Dégradé violet → cyan montant, écho au logo.
   ========================================================================== */

:root {
  /* Palette (brief) */
  --violet: #7C3AED;
  --blue:   #2563EB;
  --sky:    #0EA5E9;
  --cyan:   #38E1FF;
  --night:  #070B16;
  --night-2:#05080F;
  --text:   #EAF2FF;
  --muted:  #8A9BB8;

  --grad: linear-gradient(120deg, var(--violet), var(--blue) 45%, var(--sky) 80%, var(--cyan));
  --grad-soft: linear-gradient(120deg, rgba(124,58,237,.18), rgba(56,225,255,.14));

  --card: rgba(255, 255, 255, .035);
  --card-brd: rgba(138, 155, 184, .16);
  --card-brd-hi: rgba(56, 225, 255, .45);

  --maxw: 1160px;
  --radius: 18px;
  --ease: cubic-bezier(.2, .7, .2, 1);

  --font-title: "Space Grotesk", system-ui, sans-serif;
  --font-body:  "Inter", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--night-2);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(56, 225, 255, .3); color: #fff; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ------------------------------------------------------------------ FOND */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; }

/* dégradé qui monte : sombre/violet en bas -> cyan flash en haut */
.bg-gradient {
  position: absolute; inset: 0;
  background:
    radial-gradient(1200px 700px at 80% 108%, rgba(124,58,237,.22), transparent 60%),
    radial-gradient(1100px 800px at 12% 118%, rgba(37,99,235,.20), transparent 55%),
    radial-gradient(900px 700px at 50% -10%, rgba(56,225,255,.14), transparent 60%),
    linear-gradient(180deg, #060A15 0%, var(--night) 40%, var(--night-2) 100%);
}

.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(138,155,184,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(138,155,184,.045) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

#neural { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }

.bg-glow {
  position: absolute; left: 50%; bottom: -30%; transform: translateX(-50%);
  width: 900px; height: 900px; border-radius: 50%;
  background: radial-gradient(circle, rgba(56,225,255,.10), transparent 65%);
  filter: blur(30px);
  animation: pulse 8s var(--ease) infinite;
}
@keyframes pulse { 0%,100% { opacity: .6; } 50% { opacity: 1; } }

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

.section { padding: clamp(72px, 11vw, 140px) 0; position: relative; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.kicker {
  display: inline-block; font-family: var(--font-title); font-weight: 600;
  font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 16px;
  padding: 6px 14px; border: 1px solid var(--card-brd);
  border-radius: 100px; background: var(--card);
}

.section-head { margin-bottom: 44px; max-width: 720px; }
h2 {
  font-family: var(--font-title); font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 3.1rem); line-height: 1.08; letter-spacing: -.02em;
}
.lead { font-size: clamp(1.02rem, 1.6vw, 1.22rem); color: var(--muted); max-width: 720px; }

/* --------------------------------------------------------------- HEADER */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; max-width: var(--maxw); margin: 0 auto;
  transition: all .3s var(--ease);
}
.site-header.scrolled {
  background: rgba(7, 11, 22, .72);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-brd);
  padding: 10px 24px; left: 50%; transform: translateX(-50%);
  width: 100%; border-radius: 0 0 16px 16px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { filter: drop-shadow(0 2px 10px rgba(56,225,255,.35)); }
.brand-name { font-family: var(--font-title); font-weight: 700; font-size: 1.25rem; letter-spacing: -.01em; }
.brand-name .accent { color: var(--cyan); }

.nav { display: flex; align-items: center; gap: 30px; }
.nav a { font-size: .95rem; color: var(--muted); font-weight: 500; transition: color .2s; }
.nav a:hover { color: var(--text); }
.nav .nav-cta {
  color: var(--text); padding: 9px 20px; border-radius: 100px;
  border: 1px solid var(--card-brd-hi);
  background: var(--grad-soft);
}
.nav .nav-cta:hover { box-shadow: 0 0 24px rgba(56,225,255,.28); }

.burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s var(--ease); }
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 0; right: 0; z-index: 99;
  height: 100vh; width: min(78vw, 320px);
  background: rgba(7, 11, 22, .96); backdrop-filter: blur(20px);
  border-left: 1px solid var(--card-brd);
  display: flex; flex-direction: column; gap: 8px; padding: 100px 28px 40px;
  transform: translateX(100%); transition: transform .35s var(--ease);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a { font-family: var(--font-title); font-size: 1.3rem; padding: 12px 0; border-bottom: 1px solid var(--card-brd); color: var(--text); }

/* --------------------------------------------------------------- BUTTONS */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-title); font-weight: 600; font-size: 1rem;
  padding: 14px 28px; border-radius: 100px; cursor: pointer; border: 0;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
}
.btn-primary {
  color: #04101f; background: var(--grad); background-size: 160% 160%;
  box-shadow: 0 8px 30px rgba(56,225,255,.28);
  animation: shift 6s ease infinite;
}
@keyframes shift { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(56,225,255,.45); }
.btn-ghost { color: var(--text); background: var(--card); border: 1px solid var(--card-brd); }
.btn-ghost:hover { border-color: var(--card-brd-hi); transform: translateY(-3px); }
.btn-block { width: 100%; margin-top: 8px; }

/* --------------------------------------------------------------- HERO */
.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 90px; position: relative; }
.hero-inner {
  width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
}
.eyebrow {
  display: inline-block; font-size: .82rem; letter-spacing: .04em; color: var(--cyan);
  padding: 7px 16px; border-radius: 100px; margin-bottom: 24px;
  background: var(--card); border: 1px solid var(--card-brd);
}
.hero-title {
  font-family: var(--font-title); font-weight: 700;
  font-size: clamp(3rem, 8vw, 6rem); line-height: .98; letter-spacing: -.03em; margin-bottom: 24px;
}
.hero-sub { font-size: clamp(1.05rem, 1.8vw, 1.3rem); color: var(--muted); max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-proof { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: .92rem; }
.hero-proof strong { color: var(--cyan); }
.hero-proof .dot { color: rgba(138,155,184,.5); }

.hero-logo { display: flex; justify-content: center; }
.hero-logo img {
  width: min(100%, 460px);
  filter: drop-shadow(0 20px 60px rgba(56,225,255,.22));
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-16px); } }

.scroll-cue {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 42px; border: 2px solid var(--card-brd); border-radius: 100px;
  display: flex; justify-content: center; padding-top: 8px;
}
.scroll-cue span { width: 4px; height: 8px; border-radius: 4px; background: var(--cyan); animation: cue 1.6s var(--ease) infinite; }
@keyframes cue { 0% { opacity: 0; transform: translateY(0); } 40% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* --------------------------------------------------------------- POUR QUI */
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 44px; }
.pain {
  list-style: none; display: flex; flex-direction: column; gap: 12px;
  padding: 24px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-brd);
  font-family: var(--font-title); font-weight: 500; font-size: 1.02rem;
  transition: transform .3s var(--ease), border-color .3s;
}
.pain:hover { transform: translateY(-6px); border-color: var(--card-brd-hi); }
.pain-ico { font-size: 1.7rem; }

/* --------------------------------------------------------------- SERVICES */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  position: relative; padding: 34px 28px 30px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-brd);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: var(--grad); opacity: 0;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; transition: opacity .35s;
}
.card:hover { transform: translateY(-8px); box-shadow: 0 24px 60px rgba(4,10,25,.6); }
.card:hover::before { opacity: 1; }
.card-feature { background: var(--grad-soft); border-color: var(--card-brd-hi); }
.badge {
  position: absolute; top: 18px; right: 18px; font-family: var(--font-title);
  font-size: .72rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase;
  color: #04101f; background: var(--grad); padding: 5px 12px; border-radius: 100px;
}
.hex-ico { position: relative; width: 54px; height: 58px; margin-bottom: 22px; }
.hex-ico svg { width: 100%; height: 100%; }
.hex-ico polygon { fill: var(--grad-soft); stroke: url(#hexstroke); }
.hex-ico svg polygon { fill: rgba(56,225,255,.10); stroke: var(--cyan); stroke-width: 1.5; }
.hex-ico span {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-title); font-weight: 700; font-size: 1.1rem; color: var(--cyan);
}
.card h3 { font-family: var(--font-title); font-weight: 600; font-size: 1.4rem; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: .98rem; margin-bottom: 20px; }
.ticks { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.ticks li { position: relative; padding-left: 26px; font-size: .95rem; color: var(--text); }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 8px;
  border-left: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan);
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------- SPLIT (pourquoi) */
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.split-text h2 { margin-bottom: 22px; }
.proofs { display: flex; flex-direction: column; gap: 16px; }
.proof-item {
  padding: 24px 26px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-brd);
  border-left: 3px solid transparent; border-image: var(--grad) 1;
  transition: transform .3s var(--ease);
}
.proof-item:hover { transform: translateX(6px); }
.proof-num { display: block; font-family: var(--font-title); font-weight: 700; font-size: 1.3rem; color: var(--text); margin-bottom: 4px; }
.proof-label { color: var(--muted); font-size: .95rem; }

/* --------------------------------------------------------------- À PROPOS */
.about { max-width: 860px; text-align: center; }
.about .section-head { margin: 0 auto 32px; }
.about .lead { margin: 0 auto; }
.manifesto {
  font-family: var(--font-title); font-weight: 500;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem); line-height: 1.3; margin-top: 40px;
  padding: 36px 32px; border-radius: var(--radius);
  background: var(--grad-soft); border: 1px solid var(--card-brd-hi);
}

/* --------------------------------------------------------------- CONTACT */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-head h2 { margin-bottom: 20px; }
.contact-links { display: flex; flex-direction: column; gap: 12px; margin-top: 30px; }
.contact-link {
  display: inline-flex; align-items: center; gap: 8px; width: fit-content;
  padding: 12px 20px; border-radius: 100px; font-weight: 500;
  background: var(--card); border: 1px solid var(--card-brd); transition: .25s var(--ease);
}
.contact-link:hover { border-color: var(--card-brd-hi); transform: translateX(4px); color: var(--cyan); }

.contact-form {
  padding: 34px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-brd);
  backdrop-filter: blur(8px);
}
.field { margin-bottom: 20px; }
.field label { display: block; font-family: var(--font-title); font-weight: 500; font-size: .9rem; margin-bottom: 8px; color: var(--text); }
.field input, .field textarea {
  width: 100%; padding: 14px 16px; border-radius: 12px;
  background: rgba(5, 8, 15, .6); border: 1px solid var(--card-brd);
  color: var(--text); font-family: var(--font-body); font-size: 1rem; resize: vertical;
  transition: border-color .25s, box-shadow .25s;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(138,155,184,.6); }
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(56,225,255,.15);
}
.form-note { text-align: center; color: var(--muted); font-size: .85rem; margin-top: 14px; }
.form-status { text-align: center; font-size: .95rem; margin-top: 14px; min-height: 1.2em; }
.form-status.ok { color: var(--cyan); }

/* --------------------------------------------------------------- FOOTER */
.site-footer { border-top: 1px solid var(--card-brd); padding: 64px 0 28px; margin-top: 40px; background: rgba(5,8,15,.5); }
.footer-inner { display: grid; grid-template-columns: 1.2fr 2fr; gap: 40px; }
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-brand .brand-name { display: block; font-size: 1.3rem; }
.footer-brand .signature { display: block; color: var(--muted); font-size: .92rem; margin-top: 2px; font-style: italic; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.footer-col h4 { font-family: var(--font-title); font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; color: var(--cyan); margin-bottom: 16px; }
.footer-col a, .footer-col span { display: block; color: var(--muted); font-size: .95rem; margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--card-brd);
  color: var(--muted); font-size: .88rem;
}
.muted { color: var(--muted); }

/* --------------------------------------------------------------- REVEAL */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* --------------------------------------------------------------- RESPONSIVE */
@media (max-width: 900px) {
  .nav { display: none; }
  .burger { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-proof { justify-content: center; }
  .hero-logo { order: -1; }
  .hero-logo img { width: min(72%, 320px); }
  .cards { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 36px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .pain-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
}

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