/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:ital,wght@0,400;0,500;1,400&display=swap');

/* ── Design Tokens ── */
:root {
  --bg:      #ffffff;
  --fg:      #2c2c2c;
  --fg-dim:  #6b6b6b;
  --accent:  #4a4a4a;
  --accent-dim: rgba(74, 74, 74, 0.08);
  --surface: rgba(255, 255, 255, 0.92);
  --font-heading: 'IBM Plex Mono', 'Menlo', monospace;
  --font-body:    'IBM Plex Mono', 'Menlo', monospace;
  --max-prose: 680px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ── Typography ── */
h1 {
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h2 {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

p { margin-bottom: var(--space-sm); }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}
a:hover { opacity: 0.75; }

/* ── Shared Components ── */

/* Warning block */
.warning {
  border-left: 3px solid var(--accent);
  background: var(--accent-dim);
  padding: var(--space-sm) var(--space-md);
  margin: var(--space-md) 0;
  font-size: 0.875rem;
  border-radius: 0 4px 4px 0;
}

/* Outbound link */
.link-out {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: 0.875rem;
}
.link-out::after {
  content: '↗';
  font-size: 0.75em;
  opacity: 0.6;
}

/* FAQ list */
.faq-list { margin-top: var(--space-md); }

.faq-list dt {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--fg);
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}
.faq-list dt:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.faq-list dd {
  margin-top: var(--space-xs);
  color: var(--fg-dim);
  font-size: 0.875rem;
  line-height: 1.75;
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Scroll hint animation ── */
@keyframes pulse-line {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50%      { opacity: 1;   transform: scaleY(1); }
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.scroll-hint span {
  display: block;
  width: 2px;
  height: 32px;
  background: var(--accent);
  animation: pulse-line 2s ease-in-out infinite;
}
.scroll-hint small {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-dim);
}