/*
  base.css — token'lar doğrudan semantik etiketlere uygulanır.
  Amaç: h1–h6, p, a, table, form elemanları vb. HİÇBİR class eklenmeden
  doğru görünmeli. Utility class yok; bileşene özgü varyasyonlar
  components.css'te, ama temel görünüm her zaman burada, etikette kurulu.
*/

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

* {
  margin: 0;
}

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

body {
  font-family: var(--font-base);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ---------- Başlıklar ---------- */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text);
  font-weight: 800;
  line-height: var(--lh-tight);
  text-wrap: balance;
  margin-block-end: var(--space-4);
}

h1 {
  font-size: var(--fs-h1);
  letter-spacing: -0.01em;
}

h2 {
  font-size: var(--fs-h2);
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--fs-h3);
}

h4 {
  font-size: var(--fs-h4);
  font-weight: 700;
}

h5 {
  font-size: var(--fs-body);
  font-weight: 700;
}

h6 {
  font-size: var(--fs-caption);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--color-text-muted);
}

/* ---------- Gövde metni ---------- */

p,
li,
dd {
  max-inline-size: var(--measure);
}

p {
  margin-block-end: var(--space-4);
}

p:last-child {
  margin-block-end: 0;
}

ul,
ol,
dl {
  margin-block-end: var(--space-4);
}

ul:last-child,
ol:last-child,
dl:last-child {
  margin-block-end: 0;
}

small {
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
}

strong,
b {
  font-weight: 700;
}

/* ---------- Bağlantılar ---------- */

a {
  color: var(--color-primary);
  text-underline-offset: 0.15em;
  text-decoration-thickness: from-font;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

/* ---------- Alıntı / ayraç ---------- */

blockquote {
  padding-inline-start: var(--space-5);
  border-inline-start: 3px solid var(--color-primary);
  color: var(--color-text-muted);
  font-size: var(--fs-h4);
  font-style: italic;
  max-inline-size: var(--measure);
}

hr {
  border: none;
  border-block-start: var(--border-w) solid var(--color-border);
  margin-block: var(--space-6);
}

/* ---------- Kod ---------- */

code,
kbd,
samp {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-surface-alt);
  border: var(--border-w) solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.15em 0.4em;
}

pre {
  font-family: var(--font-mono);
  background: var(--color-surface-alt);
  border: var(--border-w) solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  overflow-x: auto;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

/* ---------- Tablolar ---------- */

table {
  border-collapse: collapse;
  width: 100%;
  font-size: var(--fs-body);
}

th,
td {
  text-align: start;
  padding: var(--space-3) var(--space-4);
  border-block-end: var(--border-w) solid var(--color-border);
  vertical-align: top;
}

th {
  color: var(--color-text-muted);
  font-size: var(--fs-caption);
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
}

caption {
  text-align: start;
  font-weight: 700;
  margin-block-end: var(--space-3);
}

/* ---------- Medya ---------- */

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

/* ---------- Form elemanları ---------- */

label {
  font-weight: 600;
  color: var(--color-text);
}

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

input,
textarea,
select {
  color: var(--color-text);
  background: var(--color-surface);
  border: var(--border-w) solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:hover,
textarea:hover,
select:hover {
  border-color: var(--color-primary);
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

/* ---------- Seçim rengi ---------- */

::selection {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}

/* ---------- Erişilebilirlik ---------- */

:focus {
  outline: none;
}

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

.skip-link {
  position: absolute;
  inset-inline-start: var(--space-3);
  top: -3rem;
  z-index: var(--z-skip-link);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

.skip-link:focus-visible {
  top: var(--space-3);
}

.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;
}

ul[class],
ol[class] {
  list-style: none;
  padding-inline-start: 0;
}

/* ---------- Hareket azaltma tercihi ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}