@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./fonts/SourceSerif4-Regular.woff2") format("woff2");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("./fonts/SourceSerif4-SemiBold.woff2") format("woff2");
}
@font-face {
  font-family: "Source Serif 4";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("./fonts/SourceSerif4-Italic.woff2") format("woff2");
}

:root {
  --color-bg: #f3f2f2;
  --color-surface: #eae9e9;
  --color-text: #201e1d;
  --color-accent: #0088b0;
  --color-accent-200: #cbeeff;
  --color-accent-300: #99e0ff;
  --color-accent-400: #62c5ee;
  --color-accent-600: #1186ac;
  --color-accent-700: #006786;
  --color-accent-900: #0a303e;
  --color-accent-2-400: #ff90b1;
  --color-divider: color-mix(in srgb, #201e1d 16%, transparent);

  --font-heading: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-heading-weight: 600;

  --space-1: 5px;
  --space-2: 10px;
  --space-3: 15px;
  --space-4: 20px;
  --radius-md: 2px;
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--color-bg); color: var(--color-text);
  font-family: var(--font-body); font-size: 15px; line-height: 1.55; font-weight: 400; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading);
  font-weight: var(--font-heading-weight); line-height: 1.12;
  letter-spacing: -0.015em; margin: 0 0 var(--space-2); }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-accent); text-underline-offset: 3px; }
img { display: block; max-width: 100%; }
figure { margin: 0; }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--color-accent) 30%, transparent); }

.nav { display: flex; align-items: center; gap: var(--space-4);
  padding: var(--space-3) var(--space-4); border-bottom: none; }
.nav-brand { font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 18px; margin-right: auto; }
.nav a { color: inherit; text-decoration: none; font-size: 14px; }
.nav a:hover, .nav a[aria-current='page'] { color: var(--color-accent); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none;
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 14px; line-height: 1.2; color: var(--color-text);
  background: transparent; border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2); border-radius: var(--radius-md); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: var(--color-accent-600); }
.btn-primary:active { background: var(--color-accent-700); }

.input { width: 100%; min-height: 36px; padding: 6px 10px; font: inherit;
  font-size: 14px; color: var(--color-text); caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.input::placeholder { color: color-mix(in srgb, var(--color-text) 65%, transparent); opacity: 1; }
.input:hover { border-color: color-mix(in srgb, var(--color-text) 45%, transparent); }
.input:focus-visible { border-color: var(--color-accent); outline-offset: 0; }