/* =====================================================================
   Satranç Radar · Temel stiller
   Sıfırlama, tipografi, odak, hareket tercihleri, yardımcı sınıflar.
   ===================================================================== */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  min-height: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font: 400 var(--text-md) / var(--leading-body) var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { flex: 1 0 auto; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.01em;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: clamp(30px, 4.2vw, var(--text-4xl)); }
h2 { font-size: clamp(24px, 3vw, var(--text-2xl)); }
h3 { font-size: var(--text-xl); font-weight: 600; }
h4 { font-size: var(--text-lg); font-weight: 600; }

p { text-wrap: pretty; }
p + p { margin-top: var(--space-3); }

a {
  color: var(--accent-2);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--dur-fast) var(--ease-standard);
}
a:hover { color: var(--accent); }

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

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

:focus { outline: none; }
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

::placeholder { color: var(--ink-3); opacity: 1; }

code, kbd {
  font: 500 0.9em var(--font-mono);
  background: var(--surface-2);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

[hidden] { display: none !important; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -60px;
  z-index: 1000;
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: top var(--dur-fast) var(--ease-standard);
}
.skip-link:focus { top: var(--space-4); color: var(--accent-ink); }

/* Düzen yardımcıları */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow { max-width: var(--container-narrow); }
.container--prose { max-width: var(--container-prose); }

.stack > * + * { margin-top: var(--space-4); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-3); align-items: center; }
.row { display: flex; align-items: center; gap: var(--space-3); }
.grow { flex: 1 1 auto; min-width: 0; }

.text-muted { color: var(--ink-3); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.nowrap { white-space: nowrap; }
.tabular { font-variant-numeric: tabular-nums; }
.mono { font-family: var(--font-mono); }

.eyebrow {
  display: inline-block;
  font: 600 var(--text-xs) / 1.2 var(--font-body);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
}

/* Sayfa girişi: görünür durumdan başlar, sadece hafif yükselir */
@keyframes page-enter {
  from { opacity: 0.001; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
.page-enter { animation: page-enter var(--dur-slow) var(--ease-out) both; }

/* Liste öğeleri art arda */
@keyframes item-enter {
  from { opacity: 0.001; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}
.stagger > * { animation: item-enter var(--dur-slow) var(--ease-out) both; }
.stagger > :nth-child(1)  { animation-delay: 0ms; }
.stagger > :nth-child(2)  { animation-delay: 30ms; }
.stagger > :nth-child(3)  { animation-delay: 60ms; }
.stagger > :nth-child(4)  { animation-delay: 90ms; }
.stagger > :nth-child(5)  { animation-delay: 120ms; }
.stagger > :nth-child(6)  { animation-delay: 150ms; }
.stagger > :nth-child(7)  { animation-delay: 180ms; }
.stagger > :nth-child(8)  { animation-delay: 210ms; }
.stagger > :nth-child(n+9) { animation-delay: 240ms; }

/* Sayfalar arası geçiş (destekleyen tarayıcılarda) */
@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) { animation-duration: var(--dur-base); }