/* ═══════════════════════════════════════════════════════════════════════ */
/* NEXUS HUMAN OS · OFFRES LANDING · Apple/Tesla-grade design system        */
/* ═══════════════════════════════════════════════════════════════════════ */

:root {
  /* Surfaces */
  --s-0: #000000;
  --s-1: #080A12;
  --s-2: #0F1219;
  --s-3: #181C26;

  /* Text */
  --t-1: #F5F5F7;
  --t-2: rgba(245, 245, 247, .72);
  --t-3: rgba(245, 245, 247, .48);
  --t-4: rgba(245, 245, 247, .24);

  /* Accents */
  --gold: #D4B061;
  --gold-2: #E8C97A;
  --red: #FF453A;
  --green: #32D74B;
  --blue: #0A84FF;
  --purple: #BF5AF2;

  /* Divider */
  --line: rgba(245, 245, 247, .08);

  /* Spacing */
  --s: 4px;

  /* Radius */
  --r-s: 8px;
  --r-m: 14px;
  --r-l: 20px;
  --r-xl: 28px;

  /* Shadows */
  --sh-1: 0 1px 2px rgba(0,0,0,.4);
  --sh-2: 0 8px 24px rgba(0,0,0,.45);
  --sh-3: 0 24px 64px rgba(0,0,0,.65);
  --glow: 0 0 40px rgba(212,176,97,.18);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { max-width: 100vw; overflow-x: hidden; background: var(--s-0); }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  color: var(--t-1);
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(212, 176, 97, .3); color: #fff; }
::-webkit-scrollbar { width: 0; }

/* Typography */
.eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11px; letter-spacing: .2em;
  text-transform: uppercase; color: var(--gold);
  font-weight: 500;
}
.label {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 10px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--t-3);
  font-weight: 500;
}

h1, h2, h3 {
  font-family: 'Orbitron', sans-serif;
  color: var(--t-1);
  letter-spacing: -.02em;
  font-weight: 900;
}
h1 { font-size: clamp(44px, 9vw, 88px); line-height: 1.02; }
h2 { font-size: clamp(32px, 6vw, 56px); line-height: 1.05; letter-spacing: -.015em; }
h3 { font-size: clamp(22px, 3.2vw, 32px); line-height: 1.1; letter-spacing: -.008em; }

p, .body {
  font-size: 17px; line-height: 1.6;
  color: var(--t-2);
}
.lead { font-size: 22px; line-height: 1.5; color: var(--t-1); font-weight: 300; letter-spacing: -.008em; }

.mono {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}

/* Layout */
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; position: relative; }
@media (max-width: 720px) { section { padding: 64px 0; } }

/* NAV */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(0,0,0,.72); backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-in { max-width: 1160px; margin: 0 auto; padding: 16px 24px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: 'Orbitron', sans-serif; font-size: 14px; font-weight: 900; letter-spacing: .35em; color: var(--t-1); text-decoration: none; }
.logo span { color: var(--gold); font-size: 10px; letter-spacing: .2em; font-weight: 700; margin-left: 10px; }
.cta-btn {
  padding: 10px 20px; border: 1px solid var(--gold); background: transparent;
  color: var(--gold); font-family: 'JetBrains Mono', monospace; font-size: 11px;
  font-weight: 500; letter-spacing: .15em; text-transform: uppercase; text-decoration: none;
  border-radius: 100px; transition: all .2s;
}
.cta-btn:hover { background: var(--gold); color: var(--s-0); }
.cta-btn.primary { background: var(--gold); color: var(--s-0); }
.cta-btn.primary:hover { background: var(--gold-2); }

/* HERO */
.hero { min-height: 100vh; display: flex; align-items: center; padding-top: 120px; padding-bottom: 60px; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; top: 10%; left: -10%; width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(212,176,97,.12), transparent 70%);
  filter: blur(40px); pointer-events: none;
}
.hero-in { max-width: 900px; margin: 0 auto; padding: 0 24px; text-align: center; position: relative; z-index: 1; }
.hero .eyebrow { margin-bottom: 28px; display: inline-block; padding: 8px 16px; border: 1px solid rgba(212,176,97,.25); border-radius: 100px; background: rgba(212,176,97,.04); }
.hero h1 { margin-bottom: 28px; }
.hero h1 .accent { background: linear-gradient(135deg, var(--t-1) 0%, var(--gold) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-lead { max-width: 640px; margin: 0 auto 48px; font-size: 21px; line-height: 1.6; color: var(--t-2); font-weight: 300; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-ring {
  width: 180px; height: 180px; margin: 64px auto 0; position: relative;
  animation: pulseRing 6s ease-in-out infinite;
}
@keyframes pulseRing { 0%,100% { opacity: .85; transform: scale(1); } 50% { opacity: 1; transform: scale(1.03); } }
.hero-ring svg { width: 100%; height: 100%; filter: drop-shadow(0 0 24px rgba(212,176,97,.3)); }

/* Sections */
.section-head { max-width: 820px; margin: 0 auto 64px; text-align: center; }
.section-head .eyebrow { display: inline-block; margin-bottom: 20px; }
.section-head h2 { margin-bottom: 24px; }
.section-head p { font-size: 19px; color: var(--t-2); max-width: 680px; margin: 0 auto; }

/* Cards */
.card {
  background: linear-gradient(180deg, var(--s-2), var(--s-1));
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  padding: 32px;
  transition: transform .25s ease, border-color .25s;
}
.card:hover { border-color: rgba(212,176,97,.2); transform: translateY(-2px); }
.card.glow { box-shadow: var(--glow); border-color: rgba(212,176,97,.2); }

/* Grid utilities */
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.g4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* CONSTAT · 3 saturations cards */
.constat-card .eyebrow { color: var(--red); }
.constat-card h3 { margin-bottom: 12px; }
.constat-card p { color: var(--t-2); font-size: 15px; line-height: 1.65; }

/* ANSWER · comparison table */
.compare {
  margin-top: 40px;
  border-radius: var(--r-l); overflow: hidden;
  border: 1px solid var(--line);
  background: var(--s-1);
}
.compare-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr; padding: 18px 24px; border-bottom: 1px solid var(--line); align-items: center; font-size: 14px; }
.compare-row:last-child { border-bottom: none; }
.compare-row.head { background: var(--s-2); font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--t-3); font-weight: 500; }
.compare-row.head .ok { color: var(--gold); }
.ok { color: var(--green); }
.no { color: rgba(255, 69, 58, .8); }

@media (max-width: 720px) {
  .compare-row { grid-template-columns: 1.2fr .8fr .8fr; padding: 14px 16px; font-size: 13px; }
}

/* LAYERS · stack visuel */
.layers { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 6px; }
.layer {
  display: grid; grid-template-columns: 40px 1fr auto; gap: 16px; align-items: center;
  padding: 16px 20px; background: var(--s-2); border: 1px solid var(--line); border-radius: var(--r-m);
  transition: transform .15s, border-color .15s;
}
.layer:hover { border-color: rgba(212,176,97,.25); transform: translateX(4px); }
.layer-num { font-family: 'Orbitron', sans-serif; font-size: 18px; color: var(--gold); font-weight: 900; text-align: center; }
.layer-text { font-size: 15px; color: var(--t-1); font-weight: 500; }
.layer-desc { font-size: 12px; color: var(--t-3); font-family: 'JetBrains Mono', monospace; letter-spacing: .04em; }

/* PYRAMID */
.pyramid { max-width: 920px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.tier {
  display: grid; grid-template-columns: 1fr 280px; gap: 32px; align-items: center;
  padding: 28px 32px;
  background: linear-gradient(90deg, var(--s-2), var(--s-1));
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  transition: transform .25s, border-color .25s;
  position: relative; overflow: hidden;
}
.tier::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--t-4);
  transition: background .25s;
}
.tier:hover { transform: translateX(6px); border-color: rgba(212,176,97,.25); }
.tier:hover::before { background: var(--gold); }
.tier-free::before { background: var(--t-3); }
.tier-deep::before { background: var(--blue); }
.tier-obs::before { background: var(--green); }
.tier-pro::before { background: var(--purple); }
.tier-cmd::before { background: var(--gold); }
.tier-leg { background: linear-gradient(90deg, rgba(212,176,97,.12), rgba(212,176,97,.03)); border-color: rgba(212,176,97,.35); box-shadow: var(--glow); }
.tier-leg::before { background: linear-gradient(to bottom, var(--gold-2), var(--gold)); width: 5px; }
.tier-leg:hover { transform: scale(1.01); }
.tier-info h3 { margin-bottom: 8px; letter-spacing: -.005em; font-size: 24px; }
.tier-info .label { margin-bottom: 8px; }
.tier-info p { font-size: 14px; line-height: 1.6; color: var(--t-2); margin-bottom: 8px; }
.tier-info ul { list-style: none; padding: 0; margin-top: 12px; }
.tier-info li { font-size: 13px; color: var(--t-3); padding: 3px 0; padding-left: 18px; position: relative; }
.tier-info li::before { content: '•'; position: absolute; left: 0; color: var(--gold); font-weight: 700; }
.tier-price { text-align: right; }
.tier-price .price { font-family: 'Orbitron', sans-serif; font-size: 36px; font-weight: 900; color: var(--t-1); letter-spacing: -.02em; line-height: 1; }
.tier-price .period { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--t-3); letter-spacing: .1em; margin-top: 6px; text-transform: uppercase; }
.tier-price .cap { font-family: 'JetBrains Mono', monospace; font-size: 10px; color: var(--gold); margin-top: 10px; letter-spacing: .15em; text-transform: uppercase; font-weight: 500; }
.tier-leg .price { background: linear-gradient(135deg, var(--t-1), var(--gold-2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }

@media (max-width: 720px) {
  .tier { grid-template-columns: 1fr; gap: 16px; padding: 22px; }
  .tier-price { text-align: left; }
  .tier-price .price { font-size: 32px; }
}

/* LEGACY spotlight */
.legacy-spotlight {
  padding: 80px 40px; border-radius: var(--r-xl);
  background: radial-gradient(ellipse at 50% 0%, rgba(212,176,97,.15), var(--s-1) 70%);
  border: 1px solid rgba(212,176,97,.3);
  text-align: center; max-width: 920px; margin: 0 auto;
  position: relative; overflow: hidden;
}
.legacy-spotlight::before {
  content: ''; position: absolute; top: -50%; left: -20%; right: -20%; height: 200%;
  background: radial-gradient(ellipse, rgba(212,176,97,.08), transparent 60%);
  animation: legacyPulse 8s ease-in-out infinite;
  pointer-events: none;
}
@keyframes legacyPulse { 0%,100% { opacity: .6; } 50% { opacity: 1; } }
.legacy-spotlight h2 { margin-bottom: 20px; position: relative; }
.legacy-spotlight .counter { font-family: 'Orbitron', sans-serif; font-size: 72px; font-weight: 900; color: var(--gold); letter-spacing: -.02em; margin: 32px 0 8px; position: relative; }
.legacy-spotlight .counter-sub { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--t-3); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 40px; position: relative; }
.legacy-spotlight ul { list-style: none; padding: 0; text-align: left; max-width: 520px; margin: 0 auto 40px; position: relative; }
.legacy-spotlight li { padding: 10px 0 10px 24px; position: relative; color: var(--t-2); font-size: 15px; border-bottom: 1px solid var(--line); }
.legacy-spotlight li:last-child { border-bottom: none; }
.legacy-spotlight li::before { content: '✓'; position: absolute; left: 0; color: var(--gold); font-weight: 700; }

/* THESIS · quote large */
.thesis {
  padding: 120px 0; position: relative;
  background: linear-gradient(180deg, transparent 0%, rgba(212,176,97,.03) 50%, transparent 100%);
}
.thesis-in { max-width: 820px; margin: 0 auto; padding: 0 24px; text-align: center; }
.thesis-quote {
  font-family: 'Orbitron', sans-serif; font-weight: 300;
  font-size: clamp(28px, 4.5vw, 48px); line-height: 1.25; letter-spacing: -.012em;
  color: var(--t-1);
}
.thesis-quote span.highlight { color: var(--gold); }
.thesis-signature {
  margin-top: 40px; font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: .2em; text-transform: uppercase; color: var(--t-3);
}

/* WAITLIST */
.waitlist { padding: 100px 0; background: var(--s-1); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.waitlist-form { max-width: 520px; margin: 40px auto 0; display: flex; flex-direction: column; gap: 12px; }
.waitlist-form input, .waitlist-form textarea {
  width: 100%; padding: 16px 20px;
  background: var(--s-2); border: 1px solid var(--line);
  color: var(--t-1); font-family: inherit; font-size: 15px;
  border-radius: var(--r-m); outline: none;
  transition: border-color .15s;
}
.waitlist-form input:focus, .waitlist-form textarea:focus {
  border-color: var(--gold); box-shadow: 0 0 0 3px rgba(212,176,97,.12);
}
.waitlist-btn {
  padding: 16px; background: var(--gold); color: var(--s-0);
  font-family: 'Orbitron', sans-serif; font-size: 12px; font-weight: 700; letter-spacing: .2em;
  text-transform: uppercase; border: none; border-radius: var(--r-m);
  cursor: pointer; transition: all .2s;
}
.waitlist-btn:hover { background: var(--gold-2); transform: translateY(-1px); box-shadow: var(--glow); }

/* FOOTER */
.footer { padding: 40px 24px 60px; text-align: center; }
.footer p { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .15em; color: var(--t-4); text-transform: uppercase; }

/* Divider */
.divider { height: 1px; background: var(--line); margin: 0; border: none; }

/* Responsive refinements */
@media (max-width: 720px) {
  .hero-lead { font-size: 17px; }
  .card { padding: 24px; }
  .layer { grid-template-columns: 32px 1fr; gap: 12px; padding: 12px 16px; }
  .layer-desc { display: none; }
  .legacy-spotlight { padding: 56px 24px; }
  .legacy-spotlight .counter { font-size: 56px; }
  .thesis { padding: 80px 0; }
}