/* ============================================
   HELIUM × UW — Clean Rebuild
   Fonts: DM Serif Display + DM Sans
   Palette: Warm white, near-black, gold accent
   ============================================ */

:root {
  --bg:         #F9F8F6;
  --bg-alt:     #F2F0EC;
  --bg-dark:    #141412;
  --ink:        #1C1C1A;
  --ink-mid:    #4A4A46;
  --ink-light:  #8A8A84;
  --gold:       #B07D2E;
  --gold-bg:    #FBF5E8;
  --border:     #E4E1DA;
  --white:      #FFFFFF;

  --serif:  'DM Serif Display', Georgia, serif;
  --sans:   'DM Sans', system-ui, sans-serif;

  --max:    1100px;
  --pad-x:  48px;
  --pad-y:  100px;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 64px;
  background: rgba(249, 248, 246, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 1px 20px rgba(0,0,0,0.06); }
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}
.nav-brand .x { color: var(--gold); margin: 0 5px; }
.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-mid);
  letter-spacing: 0.02em;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }

/* ---- CONTAINER ---- */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ---- SHARED LABELS ---- */
.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 400;
  line-height: 1.15;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.section-sub {
  margin-top: 20px;
  font-size: 17px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--ink-mid);
  max-width: 640px;
}

/* ---- HERO ---- */
.hero {
  padding: 160px var(--pad-x) 100px;
  max-width: var(--max);
  margin: 0 auto;
}
.hero-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 28px;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 820px;
}
.hero-title em {
  font-style: italic;
  color: var(--gold);
}
.hero-desc {
  margin-top: 36px;
  font-size: 18px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--ink-mid);
  max-width: 600px;
}

/* ---- ABOUT ---- */
.about {
  padding: var(--pad-y) var(--pad-x);
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.about-body {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.about-body p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-mid);
}
.about-body strong {
  font-weight: 500;
  color: var(--ink);
}
.about-pillars {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.pillar {
  background: var(--white);
  padding: 36px 28px;
  transition: background 0.25s;
}
.pillar:hover { background: var(--bg); }
.pillar-num {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--gold);
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}
.pillar h3 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.3;
}
.pillar p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-mid);
}

/* ---- WHY UW ---- */
.why-uw {
  padding: var(--pad-y) var(--pad-x);
  background: var(--bg-dark);
}
.why-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: center;
}
.why-text .section-label { color: rgba(176, 125, 46, 0.9); }
.why-text h2 {
  font-family: var(--serif);
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 400;
  line-height: 1.2;
  color: var(--white);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.why-text p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: rgba(255,255,255,0.55);
  margin-bottom: 16px;
}
.why-stats {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.why-stat {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.why-stat:last-child { border-bottom: none; padding-bottom: 0; }
.stat-n {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 400;
  color: var(--gold);
  line-height: 1;
  min-width: 80px;
}
.stat-l {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.02em;
}

/* ---- SOLUTIONS ---- */
.solutions {
  padding-top: var(--pad-y);
}
.solutions > .container {
  margin-bottom: 64px;
}
.solution {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}
.solution-alt { background: var(--bg-alt); }
.sol-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 48px;
}
.sol-num {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.15em;
}
.sol-tag {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-light);
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 2px;
}
.sol-grid {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 72px;
  align-items: start;
}
.sol-title {
  font-family: var(--serif);
  font-size: clamp(32px, 3.5vw, 44px);
  font-weight: 400;
  line-height: 1.15;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}
.sol-title em {
  font-style: italic;
  color: var(--gold);
}
.sol-intro {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-mid);
}
.sol-block {
  padding: 28px 32px;
  border-radius: 4px;
  margin-bottom: 16px;
}
.sol-block.problem {
  background: var(--white);
  border: 1px solid var(--border);
}
.solution-alt .sol-block.problem {
  background: var(--bg);
}
.sol-block.solution {
  background: var(--gold-bg);
  border: 1px solid #E8D5A8;
}
.block-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 14px;
}
.sol-block.solution .block-label { color: var(--gold); }
.sol-block p {
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-mid);
  margin-bottom: 12px;
}
.sol-block p:last-child { margin-bottom: 0; }
.sol-block strong { font-weight: 500; color: var(--ink); }
.sol-capabilities {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}
.cap {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 3px;
}
.solution-alt .cap { background: var(--bg); }
.cap-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  margin-top: 6px;
  flex-shrink: 0;
}
.cap span {
  font-size: 13.5px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-mid);
}
.sol-outcome {
  padding: 28px 32px;
  background: var(--ink);
  border-radius: 4px;
}
.outcome-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}
.sol-outcome p {
  font-size: 14.5px;
  font-weight: 300;
  line-height: 1.8;
  color: rgba(255,255,255,0.65);
}

/* ---- ENGINE ---- */
.engine {
  padding: var(--pad-y) var(--pad-x);
  background: var(--white);
  border-top: 1px solid var(--border);
}
.engine-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}
.engine-item {
  background: var(--white);
  padding: 36px 28px;
  transition: background 0.25s;
}
.engine-item:hover { background: var(--bg); }
.engine-icon {
  color: var(--gold);
  margin-bottom: 20px;
}
.engine-item h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.3;
}
.engine-item p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.75;
  color: var(--ink-mid);
}
.engine-note {
  margin-top: 48px;
  padding: 28px 36px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  border-left: 3px solid var(--gold);
}
.engine-note p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-mid);
}

/* ---- CLOSING ---- */
.closing {
  padding: var(--pad-y) var(--pad-x);
  background: var(--bg-dark);
}
.closing-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: center;
}
.closing-text h2 {
  font-family: var(--serif);
  font-size: clamp(28px, 3.5vw, 42px);
  font-weight: 400;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.closing-text p {
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: rgba(255,255,255,0.5);
  max-width: 520px;
}
.closing-contact {
  display: flex;
  flex-direction: column;
  gap: 24px;
  min-width: 220px;
}
.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.contact-item:last-child { border-bottom: none; padding-bottom: 0; }
.contact-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}
.contact-val {
  font-size: 15px;
  font-weight: 300;
  color: rgba(255,255,255,0.7);
}

/* ---- REVEAL — no opacity tricks, always visible ---- */
.reveal {
  opacity: 1;
  transform: none;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  :root { --pad-x: 32px; }
  .about-body { grid-template-columns: 1fr 1fr; }
  .about-pillars { grid-template-columns: repeat(2, 1fr); }
  .engine-grid { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: 1fr; gap: 40px; }
  .sol-left { max-width: 560px; }
  .why-inner { grid-template-columns: 1fr; gap: 48px; }
  .closing-inner { grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 768px) {
  :root { --pad-x: 24px; --pad-y: 72px; }
  .nav-links { display: none; }
  .hero { padding: 120px 24px 72px; }
  .about-body { grid-template-columns: 1fr; }
  .about-pillars { grid-template-columns: 1fr; }
  .engine-grid { grid-template-columns: 1fr; }
  .why-stats { gap: 24px; }
  .stat-n { font-size: 44px; min-width: 60px; }
}