/* ==========================================================================
   Layout — base typography, structure, sections
   ========================================================================== */

body {
  background: var(--ink-1);
  color: var(--text-1);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  position: relative;
}

/* Ambient background canvas (node mesh) sits behind everything */
#mesh-bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60% 40% at 15% 0%, rgba(61, 125, 255, 0.14), transparent 60%),
    radial-gradient(50% 35% at 100% 20%, rgba(41, 211, 240, 0.10), transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
  position: relative;
  z-index: 1;
}

main {
  position: relative;
  z-index: 1;
}

section {
  padding-block: var(--sp-9);
  position: relative;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-0);
  letter-spacing: -0.02em;
  line-height: 1.08;
}

h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }

p { color: var(--text-1); }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---- Section heading kit ---- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--cyan);
  text-transform: lowercase;
  margin-bottom: var(--sp-3);
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  flex-shrink: 0;
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--sp-7);
}

.section-head p {
  margin-top: var(--sp-3);
  color: var(--text-2);
  font-size: var(--fs-md);
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

/* ---- Navbar ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: var(--sp-5);
  transition: padding var(--dur-fast) var(--ease-out), background var(--dur-fast), backdrop-filter var(--dur-fast);
}

.nav.is-scrolled {
  padding-block: var(--sp-3);
  background: rgba(4, 6, 12, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.brand-name {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  color: var(--text-0);
  font-weight: 600;
}

.brand-name span {
  color: var(--cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-2);
  position: relative;
  padding-block: 4px;
  transition: color var(--dur-fast) var(--ease-out);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--grad-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-mid) var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-0);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  display: none;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  z-index: 110;
}

.nav-toggle svg .line {
  transition: transform var(--dur-mid) var(--ease-in-out), opacity var(--dur-fast);
  transform-origin: center;
}

.nav-toggle.is-open .line-top { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open .line-mid { opacity: 0; }
.nav-toggle.is-open .line-bot { transform: translateY(-6px) rotate(-45deg); }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--sp-7);
  margin-top: var(--sp-9);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.footer-brand small {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
}

.social-row {
  display: flex;
  gap: var(--sp-3);
}

.social-row a {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-full);
  color: var(--text-2);
  transition: color var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast);
}

.social-row a svg { width: 18px; height: 18px; }

.social-row a:hover {
  color: var(--ink-0);
  background: var(--grad-primary);
  border-color: transparent;
  transform: translateY(-4px) rotate(-6deg);
  box-shadow: var(--glow-blue);
}

.footer-links {
  display: flex;
  gap: var(--sp-5);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
}

.footer-links a { color: var(--text-2); }
.footer-links a:hover { color: var(--cyan); }

/* ---- Scroll progress ---- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--grad-primary);
  z-index: 200;
  box-shadow: 0 0 12px var(--cyan);
}

/* ---- Cursor glow (desktop only) ---- */
#cursor-glow {
  position: fixed;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 125, 255, 0.12), transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  transition: opacity var(--dur-mid);
}

/* ---- Page header (inner pages) ---- */
.page-header {
  padding-top: calc(var(--sp-9) + var(--sp-6));
  padding-bottom: var(--sp-7);
}

.page-header .kicker-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  margin-bottom: var(--sp-4);
}

.page-header .kicker-row svg { width: 14px; height: 14px; }

.page-header h1 {
  font-size: clamp(2.25rem, 5vw, var(--fs-3xl));
}

.page-header .lede {
  max-width: 620px;
  margin-top: var(--sp-4);
  font-size: var(--fs-md);
  color: var(--text-2);
}