/* ─── Reset & Global ─────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity var(--transition);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  display: block;
}

ul, ol { list-style: none; }

/* ─── Layout ─────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px)  { .container { padding: 0 2.5rem; } }
@media (min-width: 1400px) { .container { padding: 0 3rem; } }
@media (min-width: 2000px) {
  .container { max-width: 1800px; }
  body { font-size: 1.15rem; }
}

/* ─── Background Grid ─────────────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--text-main) 1px, transparent 1px),
    linear-gradient(to bottom, var(--text-main) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.025;
  pointer-events: none;
}

/* ─── Utilities ───────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted   { color: var(--text-muted); }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

/* ─── Page Entry Animation ────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0);    }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}