/* ==========================================================================
   Darwin Microsystems — design system
   Palette + typography matched to zacharyrife.com (dark mode)
   ========================================================================== */

:root {
  /* surfaces */
  --bg-0: #0f172a;
  --bg-1: #1a2334;
  --bg-2: #2d3b4e;
  --bg-panel: rgba(26, 35, 52, 0.72);
  --bg-panel-strong: rgba(15, 23, 42, 0.92);

  /* text */
  --fg-0: #f0f0f0;
  --fg-1: #cbd5e1;
  --fg-2: #9e9e9e;
  --fg-3: #8b96aa;   /* bumped for WCAG AA (5.9:1) on --bg-0 */

  /* lines */
  --line: #232939;
  --line-strong: #3a4257;

  /* brand accents */
  --accent: #d60067;
  --accent-2: #8311c0;
  --accent-strong: #ff1784;
  --accent-soft: #ff79a8;

  /* Interpolated in OKLCH so the pink→purple midpoint stays bright and saturated
     instead of dipping into muddy sRGB territory. */
  --gradient: linear-gradient(in oklch 90deg, #d60067 0%, #8311c0 100%);
  --gradient-hover: linear-gradient(in oklch 180deg, #d60067 0%, #8311c0 160%);

  --ring: 0 0 0 2px rgba(214, 0, 103, 0.55);

  /* radii */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 18px;

  /* spacing */
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 6.5rem;

  /* typography */
  --font-sans: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo,
               Consolas, "Liberation Mono", monospace;

  --shadow-soft: 0 20px 60px -30px rgba(0, 0, 0, 0.7);
  --shadow-accent: 0 12px 40px -16px rgba(214, 0, 103, 0.6);

  --ease-out: cubic-bezier(.16,.84,.28,1);
  --ease-in-out: cubic-bezier(.7,0,.3,1);
}

/* -------------------------------------------------------------------------- */
/* Reset + base                                                               */
/* -------------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg-0);
  color: var(--fg-2);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100svh;
  overflow-x: hidden;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: var(--fg-0); text-decoration: none; transition: color .2s var(--ease-out); }
a:hover { color: var(--accent-strong); }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: var(--radius-sm);
}
:focus-visible { outline-offset: 2px; }

p { margin: 0 0 var(--space-4); color: var(--fg-2); }

h1, h2, h3, h4 {
  color: var(--fg-0); line-height: 1.15; letter-spacing: -0.015em;
  margin: 0 0 var(--space-4); font-weight: 600;
  font-family: var(--font-sans);
}
h1 { font-size: clamp(2.2rem, 5.5vw + 0.5rem, 4.25rem); letter-spacing: -0.03em; font-weight: 700; }
h2 { font-size: clamp(1.6rem, 2.4vw + 0.5rem, 2.5rem); letter-spacing: -0.02em; }
h3 { font-size: 1.18rem; letter-spacing: -0.005em; font-weight: 600; }

small, .small { font-size: 0.875rem; color: var(--fg-3); }

.visually-hidden, .skip:not(:focus):not(:active) {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.skip {
  position: absolute; top: var(--space-3); left: var(--space-3);
  background: var(--accent); color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  z-index: 100; font-weight: 600;
}

.mono { font-family: var(--font-mono); font-size: 0.86em; letter-spacing: 0.01em; }

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

/* -------------------------------------------------------------------------- */
/* Layout primitives                                                          */
/* -------------------------------------------------------------------------- */

.wrap {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 3vw, 2.5rem);
}

section { position: relative; padding-block: var(--space-9); }
section + section { border-top: 1px solid var(--line); }

.eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono);
  font-size: .78rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent-soft);
  padding: .35rem .75rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(214, 0, 103, 0.08);
  font-weight: 500;
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 10px var(--accent);
}

.lede { font-size: 1.15rem; color: var(--fg-1); max-width: 55ch; }

/* -------------------------------------------------------------------------- */
/* Header / nav                                                               */
/* -------------------------------------------------------------------------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px) saturate(130%);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  background: linear-gradient(to bottom, rgba(15,23,42,0.85), rgba(15,23,42,0.55));
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease-out), background-color .25s var(--ease-out);
}
.site-header[data-scrolled="true"] {
  border-bottom-color: var(--line);
  background: rgba(15,23,42,0.92);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px;
}

.brand {
  display: inline-flex; align-items: center; gap: .7rem;
  color: var(--fg-0); font-weight: 600; letter-spacing: -0.01em;
  font-size: 1rem;
}
.brand:hover { color: var(--fg-0); }
.brand-mark {
  color: var(--accent); display: inline-flex;
  filter: drop-shadow(0 0 8px rgba(214,0,103,0.45));
}
.brand-name__primary { color: var(--fg-0); }
.brand-name__accent {
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  margin-left: .25em; font-weight: 500;
}

.nav-list {
  list-style: none; display: flex; gap: var(--space-5); margin: 0; padding: 0;
  align-items: center;
}
.nav-list a {
  color: var(--fg-1); font-size: 0.95rem; font-weight: 400;
}
.nav-list a:hover { color: var(--fg-0); }
.nav-cta {
  padding: .5rem 1rem;
  color: #fff !important;
  background: var(--gradient);
  border-radius: 999px;
  font-weight: 500;
  transition: box-shadow .2s var(--ease-out), transform .15s var(--ease-out);
}
.nav-cta:hover {
  background: var(--gradient-hover);
  box-shadow: var(--shadow-accent);
}

.nav-toggle {
  display: none;
  background: transparent; border: 1px solid var(--line-strong);
  border-radius: 10px; padding: .55rem .65rem; cursor: pointer;
  color: var(--fg-0);
}
.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  display: block; width: 18px; height: 2px; background: currentColor;
  position: relative; transition: transform .2s var(--ease-out);
}
.nav-toggle__bar::before { content: ""; position: absolute; top: -6px; left: 0; }
.nav-toggle__bar::after  { content: ""; position: absolute; top:  6px; left: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after  { transform: translateY(-6px) rotate(-45deg); }

/* -------------------------------------------------------------------------- */
/* Hero                                                                        */
/* -------------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: min(92svh, 920px);
  display: grid; align-items: center;
  padding-block: var(--space-9);
  overflow: hidden;
  isolation: isolate;
  border-top: 0;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(ellipse 80% 60% at 20% 15% in oklab, rgba(214, 0, 103, 0.18), transparent 70%),
    radial-gradient(ellipse 60% 50% at 85% 80% in oklab, rgba(131, 17, 192, 0.14), transparent 70%),
    linear-gradient(180deg, #0f172a 0%, #0c1427 60%, #080f1f 100%);
}
#bg-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  z-index: -1;
  opacity: .95;
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(180deg,
    rgba(15,23,42,0) 55%,
    rgba(15,23,42,0.6) 85%,
    rgba(15,23,42,1) 100%);
  pointer-events: none;
}

.hero .wrap {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}
.hero__inner { max-width: 780px; }
.hero__title {
  margin-top: var(--space-5);
  text-wrap: balance;
  color: var(--fg-0);
}
.hero__title em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero__sub {
  font-size: clamp(1.05rem, 1.3vw + 0.7rem, 1.3rem);
  color: var(--fg-1); max-width: 58ch;
  margin-block: var(--space-5) var(--space-6);
  font-weight: 300;
}

.cta-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: .55rem;
  padding: .85rem 1.35rem;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-weight: 500; font-size: 0.98rem; letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer; text-decoration: none;
  transition: transform .15s var(--ease-out), background .2s var(--ease-out),
              border-color .2s var(--ease-out), color .2s var(--ease-out),
              box-shadow .25s var(--ease-out);
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn--primary:hover {
  background: var(--gradient-hover);
  color: #fff;
  box-shadow: 0 16px 44px -14px rgba(214, 0, 103, 0.7);
}
.btn--ghost {
  border-color: var(--line-strong);
  color: var(--fg-0);
  background: transparent;
}
.btn--ghost:hover { border-color: var(--accent); color: var(--fg-0); background: rgba(214,0,103,0.08); }
.btn__arrow { transition: transform .2s var(--ease-out); }
.btn:hover .btn__arrow { transform: translateX(3px); }

.hero__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-5) var(--space-6);
  margin-top: var(--space-7);
  color: var(--fg-3);
  font-family: var(--font-mono); font-size: .82rem; letter-spacing: .06em;
  text-transform: uppercase;
}
.hero__meta span { display: inline-flex; align-items: center; gap: .55rem; }
.hero__meta span::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 8px var(--accent);
}

/* -------------------------------------------------------------------------- */
/* Sections                                                                    */
/* -------------------------------------------------------------------------- */

.section-head { max-width: 60ch; margin-bottom: var(--space-7); }
.section-head h2 { margin-top: var(--space-3); text-wrap: balance; }

/* Range — pillars + marquee */
.range-pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.range-pillar {
  position: relative;
  padding: var(--space-5);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-panel);
  backdrop-filter: blur(6px);
  transition: border-color .25s var(--ease-out), transform .25s var(--ease-out),
              background-color .25s var(--ease-out);
  overflow: hidden;
  isolation: isolate;
}
.range-pillar::before {
  content: ""; position: absolute; inset: -1px; z-index: -1;
  border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg in oklch, transparent 40%, rgba(214, 0, 103, 0.55) 75%, rgba(131, 17, 192, 0.55) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .3s var(--ease-out);
}
.range-pillar:hover { transform: translateY(-2px); border-color: var(--line-strong); background: var(--bg-panel-strong); }
.range-pillar:hover::before { opacity: 1; }
.range-pillar__mark {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg in oklch, rgba(214, 0, 103, 0.18), rgba(131, 17, 192, 0.18));
  color: var(--accent-soft);
  border: 1px solid rgba(214, 0, 103, 0.28);
  margin-bottom: var(--space-4);
}
.range-pillar h3 { margin-bottom: var(--space-2); color: var(--fg-0); text-wrap: balance; }
.range-pillar p { color: var(--fg-2); font-size: .95rem; margin: 0; }

.range-marquee {
  position: relative; overflow: hidden;
  padding-block: var(--space-4);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
          mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.range-marquee__track {
  display: inline-flex;
  white-space: nowrap;
  animation: range-marquee 52s linear infinite;
  will-change: transform;
}
.range-marquee__copy {
  display: inline-flex; flex-shrink: 0;
}
.range-marquee__copy > span {
  font-family: var(--font-mono); font-size: .95rem;
  color: var(--fg-2); letter-spacing: .04em;
  font-weight: 400;
}
.range-marquee__copy > span::after {
  content: "·";
  display: inline-block;
  margin-inline: var(--space-4);
  color: var(--fg-3);
}
.range-marquee__copy > span:nth-child(5n+1) { color: var(--accent-soft); }
.range-marquee__copy > span:nth-child(7n+2) { color: var(--fg-1); }

@keyframes range-marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .range-marquee { -webkit-mask-image: none; mask-image: none; overflow: visible; }
  .range-marquee__track { animation: none; flex-wrap: wrap; display: flex; }
  .range-marquee__copy[aria-hidden="true"] { display: none; }
}

/* Approach */
.approach {
  display: grid; gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  counter-reset: step;
}
.step {
  padding: var(--space-5);
  border-left: 1px solid var(--line-strong);
  counter-increment: step;
  position: relative;
}
.step::before {
  content: "0" counter(step);
  font-family: var(--font-mono); font-size: .85rem;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  letter-spacing: .1em; display: block; margin-bottom: var(--space-3);
  font-weight: 500;
}
.step h3 { margin-bottom: var(--space-2); }
.step p { color: var(--fg-2); margin: 0; }

/* Trust strip */
.trust-grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: 1.1fr 1fr;
  align-items: start;
}
.trust-pillars {
  display: grid; gap: var(--space-3);
}
.pillar {
  display: grid; grid-template-columns: 36px 1fr; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
}
.pillar__icon {
  width: 36px; height: 36px; display: grid; place-items: center;
  color: var(--accent-strong);
  background: rgba(214, 0, 103, 0.1);
  border: 1px solid rgba(214, 0, 103, 0.25);
  border-radius: 8px;
}
.pillar h3 { font-size: 1rem; margin-bottom: var(--space-1); color: var(--fg-0); }
.pillar p { margin: 0; color: var(--fg-2); font-size: .92rem; }

.trust-stack {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  background: var(--bg-panel);
}
.trust-stack h3 { font-size: 1rem; margin-bottom: var(--space-3); color: var(--accent-soft);
  font-family: var(--font-mono); font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.trust-stack__note {
  font-size: .82rem; color: var(--fg-3); margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3); border-bottom: 1px dashed var(--line);
}
.trust-stack ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .4rem; }
.trust-stack li {
  font-family: var(--font-mono); font-size: .86rem;
  color: var(--fg-1); letter-spacing: 0.01em;
  padding: .4rem .6rem;
  border-bottom: 1px dashed var(--line);
  display: flex; justify-content: space-between;
}
.trust-stack li:last-child { border-bottom: 0; }
.trust-stack li span { color: var(--fg-3); font-size: .78rem; }

/* Contact */
.contact {
  padding: var(--space-7);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse 80% 100% at 10% 10% in oklab, rgba(214, 0, 103, 0.14), transparent 60%),
    radial-gradient(ellipse 80% 100% at 100% 100% in oklab, rgba(131, 17, 192, 0.14), transparent 60%),
    var(--bg-panel-strong);
  text-align: left;
  position: relative; overflow: hidden;
}
.contact h2 { max-width: 22ch; }
.contact__row {
  display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: center;
  margin-top: var(--space-5);
}
.contact__email {
  font-family: var(--font-mono); font-size: 1.1rem; color: var(--fg-0);
  padding: .8rem 1.2rem; border-radius: 999px;
  border: 1px dashed var(--line-strong);
}

/* -------------------------------------------------------------------------- */
/* Footer                                                                      */
/* -------------------------------------------------------------------------- */

.site-footer {
  padding-block: var(--space-7);
  border-top: 1px solid var(--line);
  color: var(--fg-2); font-size: .92rem;
  background: var(--bg-0);
}
.footer-grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: 1.3fr 1fr 1fr;
}
.footer-heading { font-family: var(--font-mono); font-size: .78rem;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent-soft);
  margin-bottom: var(--space-3); font-weight: 500; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.footer-col a { color: var(--fg-1); }
.footer-col a:hover { color: var(--accent-strong); }
.footer-brand { color: var(--fg-0); font-weight: 600; margin-bottom: .25rem; }
.footer-legal { margin: 0 0 .25rem; color: var(--fg-3); font-size: .82rem; line-height: 1.5; }
.footer-legal a { color: var(--fg-1); border-bottom: 1px dotted var(--line-strong); }
.footer-legal a:hover { color: var(--accent-strong); border-bottom-color: var(--accent); }
.heart { display: inline-block; filter: drop-shadow(0 0 6px rgba(255, 121, 168, 0.5)); }

/* -------------------------------------------------------------------------- */
/* Responsive                                                                  */
/* -------------------------------------------------------------------------- */

@media (max-width: 820px) {
  .trust-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; }
  .nav-list {
    position: absolute; inset: 64px var(--space-4) auto; top: 64px;
    flex-direction: column; gap: var(--space-2);
    background: var(--bg-panel-strong);
    border: 1px solid var(--line);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: transform .25s var(--ease-out), opacity .25s var(--ease-out);
  }
  .nav-toggle[aria-expanded="true"] ~ .nav-list,
  .nav[data-open="true"] .nav-list {
    transform: translateY(0); opacity: 1; pointer-events: auto;
  }
  .nav-list a { display: block; padding: .4rem .2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  section { padding-block: var(--space-8); }
  .contact { padding: var(--space-6); }
}

/* -------------------------------------------------------------------------- */
/* Motion                                                                     */
/* -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto; }
}

/* Reveal on scroll (progressive enhancement) */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.is-in { opacity: 1; transform: none; }