/* ─── Design tokens ─── */
:root {
  --bg: #ffffff;
  --surface: #f7f6f3;
  --accent: #a07553;
  --text: #37352f;
  --muted: #787774;
  --border-accent: #c8956c;
  --link: #a07553;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191919;
    --surface: #262626;
    --accent: #c8956c;
    --text: #e8e8e8;
    --muted: #999999;
    --border-accent: #c8956c;
    --link: #c8956c;
  }
}

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

/* ─── Base ─── */
html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Source Sans 3', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.45;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* ─── Container ─── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

/* ─── Links ─── */
a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: opacity 0.2s ease;
}

a:hover {
  opacity: 0.75;
}

/* ─── Lists ─── */
.section ul {
  list-style: none;
  padding-left: 0;
}

.section ul li {
  position: relative;
}

.section ul li::before {
  content: '\2022';
  position: absolute;
  left: 0;
  color: var(--text);
}

.section ul li strong {
  font-weight: 600;
}

/* ─── Section animation ─── */
.section {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s cubic-bezier(0.25, 0.1, 0.25, 1),
              transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

/* ─── Keyframes ─── */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── Responsive ─── */
@media (max-width: 600px) {
  html {
    font-size: 15px;
  }
}