:root {
  --bg: #f7f7f4;
  --surface: #ffffff;
  --text: #141414;
  --muted: #5f5f5f;
  --line: #d8d8d3;
  --primary: #121212;
  --radius: 14px;
  --max: 1080px;
}

html[data-theme="dark"] {
  --bg: #16181a;
  --surface: #1e2124;
  --text: #f2f2ef;
  --muted: #cbcbc6;
  --line: #3a3e42;
  --primary: #f2f2ef;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a {
  color: inherit;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  z-index: 40;
}

.scroll-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--primary);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom: 1px solid var(--line);
}

.header-row {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  width: 58px;
  display: block;
}

.logo-anim--shine {
  -webkit-mask-image: linear-gradient(110deg, #000 35%, rgba(0, 0, 0, 0.22) 50%, #000 65%);
  -webkit-mask-size: 240% 100%;
  -webkit-mask-position: 120% 0;
  mask-image: linear-gradient(110deg, #000 35%, rgba(0, 0, 0, 0.22) 50%, #000 65%);
  mask-size: 240% 100%;
  mask-position: 120% 0;
}

.logo-anim--shine:hover,
.logo-anim--shine.is-replay {
  animation: logoShine 850ms ease;
}

@keyframes logoShine {
  from {
    -webkit-mask-position: 120% 0;
    mask-position: 120% 0;
  }

  to {
    -webkit-mask-position: -20% 0;
    mask-position: -20% 0;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.95rem;
}

.site-nav a,
.mobile-menu a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.active,
.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  z-index: 62;
}

.icon-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 9px;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}

.mobile-only {
  display: none;
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--line);
  padding: 0.8rem 1rem 1rem;
  gap: 0.8rem;
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
}

.hero,
.section {
  padding: 4rem 0;
}

.section {
  border-top: 1px solid var(--line);
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.85rem;
  font-size: clamp(2rem, 5.4vw, 3.15rem);
  line-height: 1.08;
}

h2 {
  margin-bottom: 0.85rem;
  font-size: clamp(1.35rem, 3.5vw, 2rem);
}

.lead {
  max-width: 64ch;
  color: var(--muted);
}

.filter-row {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.faq-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.faq-sidebar {
  position: sticky;
  top: 94px;
  display: grid;
  gap: 0.7rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.faq-sidebar-title {
  margin: 0;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.faq-sidebar .filter-row {
  margin-top: 0;
  display: grid;
}

.chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  background: transparent;
  color: var(--muted);
}

.chip.active {
  color: var(--text);
  border-color: var(--text);
}

.faq-list {
  display: grid;
  gap: 0.65rem;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: clip;
}

.faq-item.hidden {
  display: none;
}

.faq-trigger {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  font: inherit;
  font-weight: 600;
}

.faq-panel {
  margin: 0;
  color: var(--muted);
  padding: 0 1rem 1rem;
}

.faq-cta {
  display: grid;
  gap: 0.85rem;
  width: min(100%, 560px);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 1.8rem;
  color: var(--muted);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 1.05s cubic-bezier(0.22, 1, 0.36, 1), transform 1.05s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 780px) {
  .site-nav {
    display: none;
  }

  .mobile-only {
    display: inline-flex;
  }

  .faq-layout {
    grid-template-columns: 1fr;
  }

  .faq-sidebar {
    position: static;
  }

  .faq-sidebar .filter-row {
    display: flex;
    flex-wrap: wrap;
  }

  .hero,
  .section {
    padding: 3rem 0;
  }

  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .logo-anim--shine {
    transition: none;
    animation: none;
  }
}