:root {
  --bg: #0a0a0a;
  --bg-soft: #111111;
  --surface: #121212;
  --surface-strong: #161616;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --text: #ededed;
  --muted: #a1a1aa;
  --muted-strong: #c7c7cc;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
  --font-sans: "Segoe UI", "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Cascadia Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  font-optical-sizing: auto;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.035), transparent 30%),
    linear-gradient(180deg, #0a0a0a 0%, #0d0d0d 48%, #0a0a0a 100%);
}

body.modal-open {
  overflow: hidden;
}

a,
button,
select {
  font: inherit;
}

button,
select {
  color: inherit;
}

p,
ul,
dl {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 400;
  letter-spacing: -0.03em;
}

#bg-rain {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.18;
}

.page-shell,
.overlay {
  position: relative;
  z-index: 1;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 10, 0.96);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: inherit;
  text-decoration: none;
}

.logo {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand h1 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tagline,
.eyebrow,
.panel-label,
.section-label,
.footer-note,
.modal-hint,
.footer-copy,
select,
.btn,
.meta-grid dt {
  font-family: var(--font-mono);
}

.tagline {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

select,
.btn {
  min-height: 42px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  padding: 0 14px;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

select {
  min-width: 132px;
  color-scheme: dark;
  outline: none;
}

select:hover,
select:focus-visible,
.btn:hover,
.btn:focus-visible {
  border-color: var(--border-strong);
}

.btn {
  cursor: pointer;
}

.btn:active {
  transform: translateY(1px);
}

.btn-solid {
  background: #27272a;
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.btn-solid:hover,
.btn-solid:focus-visible {
  background: #323236;
  border-color: rgba(255, 255, 255, 0.14);
}

.btn-ghost {
  background: transparent;
  color: var(--muted-strong);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.hero {
  padding: 72px 0 48px;
}

.hero-grid,
.story-grid,
.features {
  display: grid;
  gap: 18px;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.85fr);
  align-items: start;
}

.hero-copy {
  padding: 18px 0 12px;
}

.eyebrow,
.section-label,
.panel-label {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.headline {
  max-width: 11ch;
  margin: 18px 0 16px;
  font-size: clamp(3rem, 8vw, 5.75rem);
  line-height: 0.96;
  font-weight: 300;
  letter-spacing: -0.055em;
}

.sub {
  max-width: 44rem;
  color: var(--muted-strong);
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
}

.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.hero-panel {
  padding-top: 20px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: baseline;
}

.panel-value {
  color: var(--text);
  font-size: 0.95rem;
}

.signal-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 22px 0 26px;
}

.signal-list span {
  display: block;
  height: 2px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.08));
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.meta-grid dt {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta-grid dd {
  margin: 8px 0 0;
  color: var(--text);
  font-size: 1rem;
}

.story-grid {
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  margin-top: 28px;
}

.story-grid h3,
.feature h4 {
  margin-top: 12px;
  margin-bottom: 12px;
  font-size: 1.45rem;
  font-weight: 400;
}

.story-grid p:last-child,
.feature p:last-child {
  color: var(--muted-strong);
}

.quick-list {
  padding-left: 18px;
  color: var(--muted-strong);
}

.quick-list li + li {
  margin-top: 10px;
}

.features {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.feature {
  min-height: 100%;
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
}

.site-footer {
  padding-bottom: 48px;
}

.footer-line {
  height: 1px;
  margin-bottom: 18px;
  background: var(--border);
}

.footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.footer-copy,
.footer-note {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.82);
}

.overlay[hidden] {
  display: none;
}

.modal {
  width: min(480px, 100%);
  background: #121212;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 24px;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.24);
}

.modal-copy {
  display: grid;
  gap: 10px;
}

.modal h3 {
  font-size: 1.5rem;
  font-weight: 400;
}

.modal-hint,
.modal-body {
  color: var(--muted-strong);
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 980px) {
  .hero-grid,
  .story-grid,
  .features {
    grid-template-columns: 1fr;
  }

  .headline {
    max-width: 12ch;
  }

  .hero-panel {
    max-width: 620px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .nav,
  .controls,
  .footer-meta,
  .panel-head,
  .actions {
    align-items: stretch;
    flex-direction: column;
  }

  .controls,
  .actions {
    width: 100%;
  }

  select,
  .btn {
    width: 100%;
  }

  .hero {
    padding-top: 48px;
  }

  .headline {
    font-size: clamp(2.4rem, 13vw, 4rem);
  }

  .meta-grid {
    grid-template-columns: 1fr;
  }
}