/* base.css: sıfırlama, tipografi, odak halkası, yardımcılar. */

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

html {
  font-size: calc(16px * var(--ui-scale, 1));
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background: var(--bg-base);
  color: var(--fg-body);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg-base);
  color: var(--fg-body);
  font-size: var(--fs-md);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

[hidden] { display: none !important; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }

h1 { font-size: var(--fs-h1); line-height: 1.15; font-weight: 650; letter-spacing: -0.02em; color: var(--fg-strong); }
h2 { font-size: var(--fs-lg); line-height: 1.3; font-weight: 600; letter-spacing: -0.01em; color: var(--fg-heading); }
h3 { font-size: var(--fs-md); line-height: 1.35; font-weight: 600; color: var(--fg-heading); }

a { color: var(--accent-text); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
/* Metin içindeki bağlantı yalnız renkle ayırt edilmez (WCAG 1.4.1) */
:where(p, li, dd, .field-hint, .muted, .secondary) a:not([class]) { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 0.2em; }

button, input, select, textarea { font: inherit; color: inherit; margin: 0; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
button:disabled { cursor: not-allowed; }
img, svg { display: block; max-width: 100%; }

code, kbd, samp, pre { font-family: var(--font-mono); font-size: 0.92em; }
pre { margin: 0; }

hr { border: 0; border-top: 1px solid var(--line-hairline); margin: var(--sp-4) 0; }

::selection { background: var(--accent-tint-16); color: var(--fg-strong); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}
input:focus-visible, textarea:focus-visible, select:focus-visible { outline-offset: 0; }

/* telefon/tablet: 16 px'ten küçük yazı alanına odaklanınca iOS sayfayı yakınlaştırır */
@media (max-width: 900px), (pointer: coarse) {
  :is(input:not([type="checkbox"]):not([type="radio"]):not([type="hidden"]), select, textarea) { font-size: 16px; }
}

/* kaydırma çubukları: ince */
* { scrollbar-width: thin; scrollbar-color: var(--bg-strong) transparent; }
::-webkit-scrollbar { width: 0.5rem; height: 0.5rem; }
::-webkit-scrollbar-thumb { background: var(--bg-strong); border-radius: var(--r-pill); }
::-webkit-scrollbar-track { background: transparent; }

/* yardımcılar */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.mono { font-family: var(--font-mono); }
.muted { color: var(--fg-muted); }
.secondary { color: var(--fg-secondary); }
.strong { color: var(--fg-strong); font-weight: 600; }
.nowrap { white-space: nowrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.wrap-any { overflow-wrap: anywhere; }
.row { display: flex; align-items: center; gap: var(--sp-2); }
.row-wrap { display: flex; align-items: center; flex-wrap: wrap; gap: var(--sp-2); }
.stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--sp-3); }
/* Boş yer tutucular (sonradan doldurulan ileti / uyarı alanları) ızgara boşluğuyla fazladan aralık yaratmasın */
.stack:empty, .ileti-yeri:empty { display: none; }
.spacer { flex: 1; }
.grow { flex: 1; min-width: 0; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-group);
}

.skip-link {
  position: fixed; left: max(var(--sp-3), var(--safe-l)); top: max(var(--sp-3), var(--safe-t)); z-index: 100;
  transform: translateY(-300%);
  background: var(--bg-inverse); color: var(--fg-inverse);
  padding: var(--sp-2) var(--sp-4); border-radius: var(--r-md); font-weight: 600;
}
.skip-link:focus { transform: none; }

.noscript { padding: var(--sp-8); color: var(--fg-body); text-align: center; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}