/* ============ RESET & TOKENS ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #050507;
  --bg-soft: #0a0a0e;
  --surface: #101015;
  --border: rgba(255,255,255,0.09);
  --text: #f4f4f6;
  --text-dim: #8a8a94;
  --accent-1: #7c5cff;
  --accent-2: #00e5ff;
  --gradient: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  --font-display: 'Syncopate', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --ease: cubic-bezier(.16,.84,.44,1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
  line-height: 1.5;
  cursor: default;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
section { position: relative; }

::selection { background: var(--accent-1); color: #fff; }

.text-dim { color: var(--text-dim); }
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ TEXTURE / CURSOR / PROGRESS ============ */
.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 9998;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.cursor-dot {
  position: fixed; top: 0; left: 0; width: 10px; height: 10px;
  background: var(--accent-2); border-radius: 50%; pointer-events: none;
  z-index: 9999; transform: translate(-50%, -50%);
  transition: width .2s var(--ease), height .2s var(--ease), background .2s var(--ease), opacity .2s;
  mix-blend-mode: difference;
  will-change: transform;
}
@media (hover: none) { .cursor-dot { display: none; } }

.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--gradient); z-index: 9997; transition: width .1s linear;
}

/* ============ NAV ============ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 26px 5vw;
  transition: background .35s var(--ease), padding .35s var(--ease), border-color .35s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5,5,7,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 16px 5vw;
  border-bottom: 1px solid var(--border);
}

.nav-brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-size: 15px; letter-spacing: 1px; }
.nav-logo {
  width: 30px; height: auto;
  filter: brightness(0) invert(1) drop-shadow(0 0 6px rgba(0,229,255,0.55));
}
.nav-brand em { font-style: normal; color: var(--text-dim); }

.nav-links { display: flex; align-items: center; gap: 36px; font-size: 14px; }
.nav-links a:not(.nav-cta) { position: relative; color: var(--text-dim); transition: color .25s; }
.nav-links a:not(.nav-cta)::after {
  content: ''; position: absolute; left: 0; bottom: -4px; width: 0; height: 1px;
  background: var(--text); transition: width .3s var(--ease);
}
.nav-links a:not(.nav-cta):hover { color: var(--text); }
.nav-links a:not(.nav-cta):hover::after { width: 100%; }

.nav-cta {
  padding: 10px 20px; border: 1px solid var(--text); border-radius: 999px;
  font-size: 13px; transition: background .25s, color .25s;
}
.nav-cta:hover { background: var(--text); color: var(--bg); }

.nav-burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; z-index: 1001; }
.nav-burger span { width: 24px; height: 2px; background: var(--text); transition: transform .3s, opacity .3s; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; background: var(--bg); z-index: 999;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 32px;
  font-family: var(--font-display); font-size: 22px; letter-spacing: 1px;
  transform: translateY(-100%); transition: transform .45s var(--ease);
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu .nav-cta { padding: 14px 30px; }

/* ============ HERO ============ */
.hero {
  min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 140px 5vw 100px; position: relative; overflow: hidden;
}
#particles { position: absolute; inset: 0; z-index: 0; opacity: 0.6; }
.hero-glow {
  position: absolute; top: -20%; left: 50%; width: 900px; height: 900px;
  transform: translateX(-50%); border-radius: 50%; z-index: 0;
  background: radial-gradient(circle, rgba(124,92,255,0.25), rgba(0,229,255,0.08) 45%, transparent 70%);
  filter: blur(40px); pointer-events: none;
}

.hero-content { position: relative; z-index: 1; max-width: 1500px; width: 100%; }

.eyebrow {
  font-family: var(--font-display); font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 20px; display: inline-block;
}
.eyebrow::before { content: '— '; color: var(--accent-2); }

.hero-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.5rem, 6.8vw, 5.2rem); line-height: 1.08; letter-spacing: -1px; text-transform: uppercase;
}
.hero-title .line { display: block; overflow: hidden; white-space: nowrap; }

.hero-sub {
  max-width: 620px; margin: 32px auto 0; color: var(--text-dim);
  font-size: clamp(1rem, 1.6vw, 1.15rem); font-weight: 300;
}

.hero-actions { display: flex; gap: 18px; justify-content: center; margin-top: 46px; flex-wrap: wrap; }

.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  padding: 17px 34px; border-radius: 999px; font-size: 14px; font-weight: 500;
  overflow: hidden; isolation: isolate; transition: transform .3s var(--ease), border-color .3s;
}
.btn span { position: relative; z-index: 1; }
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary::before {
  content: ''; position: absolute; inset: 0; background: var(--gradient); z-index: 0;
  transform: translateY(100%); transition: transform .35s var(--ease);
}
.btn-primary:hover::before { transform: translateY(0); }
.btn-primary:hover { color: #fff; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--text); }
.btn.full { width: 100%; }

.scroll-hint {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-size: 11px; letter-spacing: 2px; color: var(--text-dim); z-index: 1;
}
.scroll-line { width: 1px; height: 40px; background: linear-gradient(var(--text-dim), transparent); overflow: hidden; position: relative; }
.scroll-line::after {
  content: ''; position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: var(--accent-2); animation: scrollDown 2s infinite ease-in-out;
}
@keyframes scrollDown { 0% { top: -100%; } 60%, 100% { top: 100%; } }

/* ============ MARQUEE ============ */
.marquee {
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 20px 0; overflow: hidden; white-space: nowrap; background: var(--bg-soft);
}
.marquee-track {
  display: inline-flex; gap: 24px; animation: marquee 26s linear infinite;
  font-family: var(--font-display); font-size: 13px; letter-spacing: 2px; color: var(--text-dim);
}
.marquee-track span:nth-child(2n) { color: var(--accent-2); }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ============ SECTION HEAD ============ */
.section-head { max-width: 720px; margin: 0 auto 64px; padding: 0 5vw; text-align: center; }
.section-head h2, .contact h2, .manifeste h2 {
  font-family: var(--font-display); font-weight: 700; text-transform: uppercase;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem); line-height: 1.25; letter-spacing: -0.5px;
}

/* ============ SERVICES ============ */
.services { padding: 140px 5vw; max-width: 1400px; margin: 0 auto; }
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.service-card {
  background: var(--bg); padding: 48px 40px; transition: background .4s var(--ease);
  position: relative; overflow: hidden;
}
.service-card:hover { background: var(--surface); }
.service-num { font-family: var(--font-display); font-size: 13px; color: var(--accent-2); margin-bottom: 24px; }
.service-card h3 { font-size: 1.5rem; margin-bottom: 14px; font-weight: 600; letter-spacing: -0.3px; }
.service-card p { color: var(--text-dim); font-weight: 300; font-size: 0.98rem; max-width: 440px; }
.service-tag {
  display: inline-block; margin-top: 24px; font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--text-dim); border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px;
}

/* ============ APPROCHE / TIMELINE ============ */
.approche { padding: 100px 5vw 160px; max-width: 1300px; margin: 0 auto; }
.timeline { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.timeline-line {
  position: absolute; top: 21px; left: 0; right: 0; height: 1px; background: var(--border);
  display: none;
}
@media (min-width: 861px) { .timeline-line { display: block; } }
.timeline-fill { height: 100%; width: 0%; background: var(--gradient); transition: width 1.4s var(--ease); }

.timeline-step { position: relative; padding-top: 60px; }
.step-marker {
  position: absolute; top: 0; left: 0; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 12px; background: var(--bg); z-index: 1;
}
.timeline-step h3 { font-size: 1.15rem; margin-bottom: 10px; font-weight: 600; }
.timeline-step p { color: var(--text-dim); font-size: 0.92rem; font-weight: 300; }

/* ============ MANIFESTE ============ */
.manifeste {
  padding: 160px 5vw; background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.manifeste-content { max-width: 950px; margin: 0 auto; text-align: center; }
.manifeste-text { line-height: 1.5; }
.manifeste-text .text-dim, .manifeste-text .gradient-text { display: block; margin-top: 14px; }

/* ============ CONTACT ============ */
.contact { padding: 160px 5vw; }
.contact-inner { max-width: 640px; margin: 0 auto; text-align: center; }
.contact-sub { color: var(--text-dim); font-weight: 300; margin-top: 20px; }

.contact-form { margin-top: 56px; text-align: left; display: flex; flex-direction: column; gap: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field { position: relative; }
.field input, .field textarea {
  width: 100%; background: transparent; border: none; border-bottom: 1px solid var(--border);
  color: var(--text); font-family: var(--font-body); font-size: 1rem; padding: 12px 2px;
  resize: none; transition: border-color .3s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent-2); }
.field label {
  position: absolute; left: 2px; top: 12px; color: var(--text-dim); font-size: 1rem;
  pointer-events: none; transition: transform .2s var(--ease), font-size .2s var(--ease), color .2s;
  transform-origin: left top;
}
.field input:focus + label, .field input:not(:placeholder-shown) + label,
.field textarea:focus + label, .field textarea:not(:placeholder-shown) + label {
  transform: translateY(-20px); font-size: 0.75rem; color: var(--accent-2);
}
.form-note { text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: 4px; }
.form-note a { color: var(--text); border-bottom: 1px solid var(--border); }
.form-note a:hover { border-color: var(--text); }

/* ============ FOOTER ============ */
.footer { padding: 90px 5vw 40px; border-top: 1px solid var(--border); }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 60px; padding-bottom: 60px; }
.footer-brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-size: 18px; letter-spacing: 1px; }
.footer-brand img {
  width: 36px;
  filter: brightness(0) invert(1) drop-shadow(0 0 6px rgba(0,229,255,0.55));
}
.footer-brand em { font-style: normal; color: var(--text-dim); }
.footer-cols { display: flex; gap: 80px; flex-wrap: wrap; }
.footer-col h4 { font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text-dim); margin-bottom: 18px; }
.footer-col a { display: block; color: var(--text); opacity: 0.85; margin-bottom: 10px; font-size: 0.95rem; transition: opacity .2s; }
.footer-col a:hover { opacity: 1; color: var(--accent-2); }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  padding-top: 30px; border-top: 1px solid var(--border); color: var(--text-dim); font-size: 0.85rem;
}

/* ============ REVEAL ANIMATIONS ============ */
.reveal, .reveal-up {
  opacity: 0; transition: opacity .8s var(--ease) var(--d, 0s), transform .8s var(--ease) var(--d, 0s);
}
.reveal { transform: translateY(24px); }
.reveal-up { transform: translateY(100%); }
.reveal.in, .reveal-up.in { opacity: 1; transform: translateY(0); }

/* ============ RESPONSIVE ============ */
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-burger { display: flex; }
  .service-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; gap: 40px; }
}

@media (max-width: 640px) {
  .hero { padding-left: 7vw; padding-right: 7vw; }
  .eyebrow { font-size: 10.5px; letter-spacing: 2px; }
}