*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.7;
  background-color: var(--color-bg);
  color: var(--color-text);
  overflow-x: hidden;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  isolation: isolate;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { display: block; }

#cursor-spotlight {
  position: fixed;
  top: 0; left: 0;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 65%);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-height);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--transition-slow),
    border-color var(--transition-slow),
    backdrop-filter var(--transition-slow);
}

#main-nav.nav--scrolled {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom-color: var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  height: 100%;
  gap: var(--space-4);
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700;
  font-size: var(--font-size-base);
  letter-spacing: -.025em;
  color: var(--color-text);
  text-decoration: none;
}

.nav-logo svg {
  width: 28px; height: 28px;
  border-radius: 7px;
  box-shadow: 0 2px 8px var(--color-accent-glow);
}

.nav-controls { display: flex; align-items: center; gap: var(--space-3); }

.lang-toggle {
  display: flex; gap: 2px;
  background: var(--color-surface-solid);
  border-radius: var(--radius-full);
  padding: 3px;
  border: 1px solid var(--color-border-solid);
}

.lang-toggle button {
  background: none; border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  transition: background var(--transition), color var(--transition);
  text-transform: uppercase;
  letter-spacing: .06em;
}

.lang-toggle button.active { background: var(--gradient-brand); color: #fff; }

#theme-toggle {
  background: var(--color-surface-solid);
  border: 1px solid var(--color-border-solid);
  cursor: pointer;
  font-size: 15px;
  color: var(--color-text-secondary);
  width: 34px; height: 34px;
  border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}

#theme-toggle:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-text);
  color: var(--color-bg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  text-decoration: none;
  letter-spacing: -.01em;
  transition: opacity var(--transition), transform var(--transition);
  white-space: nowrap;
}

.nav-cta:hover { opacity: .80; transform: translateY(-1px); text-decoration: none; }

@media (max-width: 540px) { .nav-cta { display: none; } }

.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-16));
  padding-bottom: var(--space-16);
  padding-inline: var(--space-6);
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow-strong) 0%, transparent 70%);
  top: -120px; right: -100px;
  filter: blur(60px);
  pointer-events: none;
}

.page-hero-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(var(--font-size-3xl), 6vw, var(--font-size-4xl));
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1.05;
  margin-bottom: var(--space-4);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@supports not (-webkit-background-clip: text) {
  .page-hero h1 { color: var(--color-accent); -webkit-text-fill-color: unset; }
}

.page-hero-sub {
  font-size: var(--font-size-lg);
  font-weight: 300;
  color: var(--color-text-secondary);
  letter-spacing: -.01em;
}

.page-updated {
  display: inline-block;
  margin-top: var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface-solid);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-solid);
  letter-spacing: -.005em;
}

.page-divider {
  height: 1px;
  background: var(--color-border-solid);
  max-width: var(--max-width);
  margin-inline: auto;
  margin-inline: var(--space-6);
}

.page-wrap {
  max-width: 700px;
  margin-inline: auto;
  padding: var(--space-12) var(--space-6) var(--space-24);
}

footer {
  border-top: 1px solid var(--color-border-solid);
  padding-block: var(--space-6);
  background: var(--color-bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  letter-spacing: -.005em;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.footer-links li + li::before {
  content: "|";
  color: var(--color-border-solid);
  margin-right: var(--space-4);
}

.footer-links a {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--color-accent); text-decoration: none; }