/* ============================================================
   Base — reset, typography, and element defaults
   ============================================================ */

*,
*::before,
*::after {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  border-width: 0;
  border-style: solid;
  border-color: var(--color-border);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  -webkit-font-feature-settings: "ss01", "ss02";
          font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote {
  margin: 0;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-foreground);
}

h1 { font-size: clamp(2.25rem, 4.5vw, 4rem); line-height: 1.05; }
h2 { font-size: clamp(1.75rem, 3vw, 2.75rem); line-height: 1.15; }
h3 { font-size: clamp(1.25rem, 1.8vw, 1.625rem); line-height: 1.3; }
p  { line-height: 1.7; }

ol, ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: inherit;
}

img, svg, video {
  display: block;
  vertical-align: middle;
}

img, video {
  max-width: 100%;
  height: auto;
}

button {
  margin: 0;
  padding: 0;
  font: inherit;
  color: inherit;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: inherit;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

th, td {
  padding: 0;
}

strong { font-weight: 700; }
em     { font-style: italic; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

/* Layout container */
.container-gth {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

@media (min-width: 768px) {
  .container-gth { padding-inline: 2.5rem; }
}

/* Screen-reader-only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}