/* ============================================================
   Box model reset
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

/* ============================================================
   Remove default margins and padding
   ============================================================ */
body, h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption,
blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

/* ============================================================
   Base typography
   Uses system fonts — no external font host needed by default.
   If you add Google Fonts, update CSP in _headers.
   ============================================================ */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
               Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: #1a1a1a;
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================
   Headings
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
}

/* ============================================================
   Images — always responsive
   ============================================================ */
img, video, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ============================================================
   Links
   ============================================================ */
a {
  color: inherit;
  text-decoration: underline;
}

a:hover {
  text-decoration: none;
}

/* ============================================================
   Lists
   ============================================================ */
ul, ol {
  list-style: none;
}

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

/* ============================================================
   Accessibility
   ============================================================ */
:focus-visible {
  outline: 3px solid #005fcc;
  outline-offset: 2px;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
}

.hero__title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  margin-bottom: 2rem;
}

.hero__btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
  background-color: #1a1a1a;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.hero__btn:hover {
  background-color: #333333;
}

/* ============================================================
   Accessibility
   ============================================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}