/* =========================================================
   PSM — Core Design System
   Tokens, typography, layout primitives, navbar, footer
   ========================================================= */

:root {
  /* Brand tokens */
  --navy: #07162B;
  --navy-deep: #050D18;
  --black: #0B0B0B;
  --blue: #0D6EFD;
  --blue-soft: #4C93FF;
  --purple: #7C3AED;
  --purple-soft: #A78BFA;
  --green: #16A34A;
  --green-soft: #4ADE80;
  --white: #FFFFFF;
  --mist: #B7C3D6;
  --mist-dim: #7E8CA3;
  --line: rgba(183, 195, 214, 0.12);
  --line-strong: rgba(183, 195, 214, 0.22);

  /* Surfaces */
  --bg: var(--navy);
  --bg-deep: var(--navy-deep);
  --glass: rgba(13, 22, 38, 0.55);
  --glass-light: rgba(255, 255, 255, 0.04);

  /* Type */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.22, 1, 0.36, 1);

  /* Layout */
  --container: 1240px;
  --nav-h: 64px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
}

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

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* Ambient backdrop: faint grid + gradient blobs, fixed under all content */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(13,110,253,0.16), transparent 60%),
    linear-gradient(180deg, var(--navy-deep) 0%, var(--navy) 40%, var(--navy) 100%);
  pointer-events: none;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  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% 60% at 50% 20%, black 0%, transparent 75%);
  pointer-events: none;
}

.blob {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.22;
  z-index: -1;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  position: relative;
  padding: 120px 0;
}

@media (max-width: 768px) {
  section { padding: 80px 0; }
}

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-soft);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: currentColor;
}

.eyebrow.is-lab { color: var(--green-soft); }
.eyebrow.is-edits { color: var(--purple-soft); }

h2.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 16px;
}

p.section-lead {
  color: var(--mist);
  font-size: 1.05rem;
  max-width: 560px;
  line-height: 1.7;
}

.section-head {
  margin-bottom: 64px;
}

.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-head.center p.section-lead { margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.3s ease, border-color 0.3s ease;
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 0 0 0 rgba(13,110,253,0.5);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px -6px rgba(13,110,253,0.6);
}

.btn-ghost {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-strong);
  color: var(--white);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.4);
}

.btn-sm { padding: 10px 20px; font-size: 0.85rem; }

/* ---------- Reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* =========================================================
   NAVBAR — Dynamic Island
   ========================================================= */

.island-nav {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px;
  border-radius: 100px;
  background: rgba(10, 18, 32, 0.6);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  box-shadow: 0 10px 40px -10px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.06);
  transition: bottom 0.5s var(--ease), transform 0.5s var(--ease), gap 0.4s var(--ease), padding 0.4s var(--ease);
}

.island-nav__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 10px;
  border-radius: 100px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.island-nav__brand .dot-cluster {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.island-nav__brand .dot-cluster span {
  position: absolute;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}
.island-nav__brand .dot-cluster span:nth-child(1) { background: var(--blue); top: 0; left: 5px; }
.island-nav__brand .dot-cluster span:nth-child(2) { background: var(--green); bottom: 0; left: 0; }
.island-nav__brand .dot-cluster span:nth-child(3) { background: var(--purple); bottom: 0; right: 0; }

.island-nav__links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.island-nav__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--mist);
  white-space: nowrap;
  overflow: hidden;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), max-width 0.45s var(--ease), padding 0.35s var(--ease);
}

.island-nav__link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.island-nav__link .link-label {
  max-width: 140px;
  overflow: hidden;
  transition: max-width 0.4s var(--ease), opacity 0.3s var(--ease), margin 0.4s var(--ease);
  white-space: nowrap;
}

.island-nav__link:hover,
.island-nav__link.is-active {
  background: rgba(255,255,255,0.08);
  color: var(--white);
}

.island-nav__link.is-active { color: var(--blue-soft); }

/* Desktop: collapse to icon, grow with text on hover */
@media (min-width: 901px) {
  .island-nav__link:not(:hover):not(.is-active) .link-label {
    max-width: 0;
    opacity: 0;
    margin-left: 0;
  }
  .island-nav__link:hover .link-label,
  .island-nav__link.is-active .link-label {
    max-width: 140px;
    opacity: 1;
    margin-left: 2px;
  }
  .island-nav__cta { margin-left: 6px; }
}

/* Hide-on-scroll-down behavior (desktop + mobile) */
.island-nav.is-hidden {
  bottom: -90px;
}

/* ---------- Mobile: icon-only horizontal island ---------- */
@media (max-width: 900px) {
  .island-nav {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: auto;
    border-radius: 28px;
    padding: 8px 10px;
    bottom: 18px;
    gap: 4px;
    overflow: visible;
    transition: bottom 0.5s var(--ease), transform 0.5s var(--ease);
  }

  .island-nav__brand .brand-text {
    display: none;
  }

  .island-nav__links {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
  }

  .island-nav__link {
    padding: 12px;
    border-radius: 18px;
  }

  .island-nav__link .link-label {
    display: none;
  }

  .island-nav.is-hidden {
    bottom: -100px;
  }
}

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

footer.site-footer {
  position: relative;
  padding: 80px 0 160px;
  border-top: 1px solid var(--line);
  background: var(--navy-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

.footer-brand h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}
.footer-brand p {
  color: var(--mist-dim);
  font-size: 0.9rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist-dim);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-col a, .footer-col span {
  display: block;
  color: var(--mist);
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: color 0.3s ease;
}
.footer-col a:hover { color: var(--white); }

.footer-bottom {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--mist-dim);
}

/* ---------- Page hero shared ---------- */
.page-hero {
  padding: 180px 0 100px;
  position: relative;
}

/* ---------- Misc utility ---------- */
.text-blue { color: var(--blue-soft); }
.text-green { color: var(--green-soft); }
.text-purple { color: var(--purple-soft); }
.divider { height: 1px; background: var(--line); border: none; }