/* ==========================================================================
   base.css — Reset, tipografi dasar, layout utilitas, aksesibilitas.
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--teks);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--tr-sedang), color var(--tr-sedang);
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: var(--lh-tight);
  margin: 0 0 var(--sp-3);
  color: var(--teks);
  font-weight: 600;
}
h1 { font-size: var(--fs-3xl); letter-spacing: -.02em; }
h2 { font-size: var(--fs-2xl); letter-spacing: -.01em; }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
h5 { font-size: var(--fs-md); }

p { margin: 0 0 var(--sp-4); }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { max-width: 100%; height: auto; display: block; }

button, input, select, textarea { font: inherit; color: inherit; }

ul, ol { margin: 0 0 var(--sp-4); padding-left: var(--sp-6); }

hr { border: 0; border-top: 1px solid var(--border); margin: var(--sp-6) 0; }

code, pre { font-family: var(--font-mono); font-size: .875em; }
pre {
  background: var(--surface-alt);
  padding: var(--sp-4);
  border-radius: var(--r-md);
  overflow-x: auto;
}

/* ---------- Fokus terlihat (WCAG AA) ---------- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: var(--primary);
  color: var(--primary-ink);
  padding: var(--sp-3) var(--sp-4);
  border-radius: 0 0 var(--r-md) 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- Utility ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--sp-4); }
.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;
}
.stack > * + * { margin-top: var(--sp-4); }
.row { display: flex; gap: var(--sp-3); align-items: center; }
.row-between { display: flex; gap: var(--sp-3); align-items: center; justify-content: space-between; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1 1 auto; min-width: 0; }
.grid { display: grid; gap: var(--sp-4); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.text-center { text-align: center; }
.text-right  { text-align: right; }
.muted  { color: var(--teks-lembut); }
.samar  { color: var(--teks-samar); }
.small  { font-size: var(--fs-sm); }
.tiny   { font-size: var(--fs-xs); }
.bold   { font-weight: 600; }
.nowrap { white-space: nowrap; }
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-6 { margin-bottom: var(--sp-6); }
.hidden { display: none !important; }

/* ---------- Scrollbar halus ---------- */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--r-full); border: 2px solid var(--bg); }
*::-webkit-scrollbar-track { background: transparent; }

/* ---------- Animasi dasar ---------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer { 0% { background-position: -400px 0; } 100% { background-position: 400px 0; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp var(--tr-sedang) both; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}