*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(
    to bottom,
    #eef1f4,
    var(--bg-main)
  );
  color: var(--text-main); /* výchozí = tmavé sekce */
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* =========================
   SVĚTLÉ SEKCE
   ========================= */
.section-light {
  background: transparent;
  color: var(--text-dark-muted);
}

.section-light h1,
.section-light h2,
.section-light h3 {
  color: var(--text-dark-main);
}

.section-light p,
.section-light li {
  color: var(--text-dark-muted);
}

/* =========================
   TMAVÉ SEKCE
   ========================= */
.section-dark {
  background: var(--bg-section);
  color: var(--text-main);
}

.section-dark h1,
.section-dark h2,
.section-dark h3 {
  color: var(--white);
}

.section-dark p,
.section-dark li {
  color: var(--text-muted);
}