/* =========================================================
   AlgoCubic — Design Tokens
   Palette: deep void navy + electric violet + cube-facet teal
   Type: Space Grotesk (display) / Inter (body) / JetBrains Mono (labels)
   ========================================================= */

:root {
  --void:       #05060d;
  --void-2:     #0a0d1c;
  --panel:      #0d1128;
  --panel-2:    #131a38;
  --line:       rgba(238, 241, 255, 0.09);
  --line-2:     rgba(238, 241, 255, 0.16);

  --violet:     #7c5cff;
  --violet-soft:#a893ff;
  --teal:       #2fe0c4;
  --amber:      #ffb45c;

  --ink:        #eef1ff;
  --ink-dim:    #b7bede;
  --slate:      #838ab0;
  --slate-dim:  #5d6389;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body:    "Inter", "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --container: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { color: var(--ink-dim); margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--teal);
  display: inline-block;
}

/* ---------- Ambient backdrop (grid + noise glow) shared across pages ---------- */
.field-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 45% at 18% 8%, rgba(124, 92, 255, 0.16), transparent 60%),
    radial-gradient(50% 40% at 88% 18%, rgba(47, 224, 196, 0.10), transparent 60%),
    linear-gradient(180deg, var(--void) 0%, var(--void-2) 100%);
}
.field-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 55% at 50% 20%, black, transparent 75%);
  opacity: 0.55;
}

/* ---------- Nav ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), padding 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-nav.is-scrolled {
  padding: 12px 0;
  background: rgba(5, 6, 13, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.site-nav .container { display: flex; align-items: center; justify-content: space-between; }

.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.brand-mark {
  height: 28px;
  width: auto;
  display: block;
  filter: drop-shadow(0 0 8px rgba(124,92,255,0.35));
  transition: filter 0.3s var(--ease);
}
.brand:hover .brand-mark {
  filter: drop-shadow(0 0 14px rgba(124,92,255,0.55));
}

.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a {
  font-size: 0.92rem;
  color: var(--ink-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s var(--ease);
}
.nav-links a::after {
  content: "";
  position: absolute; left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--teal);
  transition: width 0.28s var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after { width: 100%; }

.btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px;
  border-radius: 3px;
  border: 1px solid var(--line-2);
  color: var(--ink);
  background: rgba(238,241,255,0.03);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), background 0.25s var(--ease);
}
.btn:hover { border-color: var(--violet-soft); background: rgba(124,92,255,0.1); transform: translateY(-1px); }
.btn-solid {
  background: linear-gradient(135deg, var(--violet), #5a3fe0);
  border-color: transparent;
  box-shadow: 0 8px 26px rgba(124,92,255,0.32);
}
.btn-solid:hover { transform: translateY(-2px); box-shadow: 0 12px 34px rgba(124,92,255,0.42); }

/* ---------- Hero shell (per-page top section) ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 90px;
  position: relative;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible .stagger-item {
  opacity: 1; transform: translateY(0);
}
.stagger-item {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.stagger-item:nth-child(1) { transition-delay: 0.02s; }
.stagger-item:nth-child(2) { transition-delay: 0.12s; }
.stagger-item:nth-child(3) { transition-delay: 0.22s; }
.stagger-item:nth-child(4) { transition-delay: 0.32s; }

/* ---------- Sections ---------- */
section { position: relative; padding: 120px 0; }
.section-head { max-width: 640px; margin-bottom: 60px; }
.section-head h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); }
.section-head p { font-size: 1.05rem; }

/* ---------- Divider: cube-facet rule (signature structural motif) ---------- */
.facet-rule {
  display: flex; align-items: center; gap: 14px;
  margin: 0 auto;
  width: fit-content;
}
.facet-rule .facet {
  width: 7px; height: 7px;
  background: var(--teal);
  transform: rotate(45deg);
  box-shadow: 0 0 8px rgba(47,224,196,0.7);
}
.facet-rule .line { width: 90px; height: 1px; background: var(--line-2); }

/* ---------- Card grid ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

.card {
  background: linear-gradient(160deg, var(--panel), var(--void-2));
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 30px 28px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.card::before {
  content: "";
  position: absolute; top: -1px; left: -1px;
  width: 46px; height: 46px;
  background: linear-gradient(135deg, var(--violet), transparent 70%);
  opacity: 0.35;
  clip-path: polygon(0 0, 100% 0, 0 100%);
}
.card:hover { border-color: var(--line-2); transform: translateY(-4px); }
.card .num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate-dim);
  letter-spacing: 0.08em;
}
.card h3 { font-size: 1.18rem; margin-top: 10px; }
.card p { font-size: 0.94rem; margin-bottom: 0; }

/* ---------- Stat strip ---------- */
.stat-strip {
  display: flex;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  flex: 1;
  padding: 34px 10px;
  text-align: center;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: none; }
.stat .stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  color: var(--ink);
  background: linear-gradient(135deg, var(--violet-soft), var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat .stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--slate);
  margin-top: 6px;
  text-transform: uppercase;
}

/* ---------- Contact / CTA section ---------- */
.cta-panel {
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: 56px;
  background: linear-gradient(150deg, rgba(124,92,255,0.08), rgba(47,224,196,0.04));
  position: relative;
  overflow: hidden;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 26px;
}
.form-grid .full { grid-column: 1 / -1; }
input, select, textarea {
  width: 100%;
  background: rgba(5,6,13,0.5);
  border: 1px solid var(--line-2);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 13px 14px;
  border-radius: 4px;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--violet-soft);
  box-shadow: 0 0 0 3px rgba(124,92,255,0.18);
}
textarea { resize: vertical; min-height: 100px; }
::placeholder { color: var(--slate-dim); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; }
footer p { margin: 0; font-size: 0.85rem; color: var(--slate); }
.footer-links { display: flex; gap: 22px; }
.footer-links a { font-size: 0.85rem; color: var(--slate); transition: color 0.2s; }
.footer-links a:hover { color: var(--ink); }

/* ---------- Utility ---------- */
.text-grad {
  background: linear-gradient(135deg, var(--ink) 20%, var(--violet-soft) 60%, var(--teal) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--slate);
  letter-spacing: 0.06em;
}

/* ---------- Mobile nav toggle ---------- */
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .grid-3, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .stat-strip { flex-wrap: wrap; }
  .stat { flex: 1 1 50%; border-bottom: 1px solid var(--line); }
  .nav-links { position: fixed; top: 0; right: 0; height: 100vh; width: 78vw; max-width: 320px;
    background: rgba(8,10,22,0.98); backdrop-filter: blur(20px);
    flex-direction: column; justify-content: center; align-items: flex-start; gap: 28px;
    padding: 40px; border-left: 1px solid var(--line);
    transform: translateX(100%); transition: transform 0.4s var(--ease); }
  .nav-links.is-open { transform: translateX(0); }
  .nav-toggle { display: flex; flex-direction: column; gap: 5px; z-index: 110; background: none; border: none; cursor: pointer; padding: 6px; }
  .nav-toggle span { width: 22px; height: 1.6px; background: var(--ink); display: block; }
  .cta-panel { padding: 32px 22px; }
}