/* Base shared styles (typography + headings) */

:root {
  --font-sans: "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  /* Shared light theme tokens */
  --bg: #f7f8fc;
  --bg2: #eef2ff;
  --card: #ffffff;
  --card-strong: #ffffff;
  --line: rgba(15, 23, 42, 0.12);
  --text: #0f172a;
  --muted: rgba(71, 85, 105, 0.85);
  --accent: #16a34a;
  --blue: #2563eb;
  --danger: #e11d48;
}

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

body {
  font-family: var(--font-sans);
  background: radial-gradient(900px 650px at 12% 10%, var(--bg2), var(--bg));
  color: var(--text);
  margin: 0;
}

.page-header {
  text-align: center;
  margin: 0 0 18px 0;
}

.page-header__title {
  margin: 0 0 14px 0;
}

.page-header__links {
  margin: 0;
  color: rgba(71, 85, 105, 0.85);
  font-size: 14px;
  font-weight: 600;
}

.page-header__links a {
  color: #0b6b4b;
  text-decoration: none;
}

.page-header__links a:hover {
  text-decoration: underline;
}

h1 {
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: 18px;
  font-weight: 700;
  color: #222;
  margin: 0 0 16px 0;
}

.section-title--sm {
  font-size: 18px;
  color: #111;
  margin: 0 0 10px 0;
}

.section-title--tight {
  margin-bottom: 6px;
}

.section-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 16px 0;
}

.icon-button {
  padding: 6px;
  background: transparent;
  color: #555;
  border: none;
  border-radius: 8px;
  box-shadow: none;
  font-size: 18px;
  line-height: 1;
}

.icon-button:hover {
  background: rgba(59, 130, 246, 0.12);
  color: #111;
}

@media (max-width: 768px) {
  h1 {
    font-size: 20px;
  }

  h2,
  .section-title {
    font-size: 18px;
  }
}