/* Temel: sıfırlama, tipografi, düzen ilkelleri */

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

/* display kuralları (ör. .card { display: flex }) hidden özniteliğini ezmesin. */
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  line-height: 1.08;
  letter-spacing: -0.012em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1.05em; text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

a { color: inherit; text-decoration: none; }

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

ul { margin: 0; padding: 0; list-style: none; }

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

::selection { background: var(--ink); color: var(--paper); }

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

/* ---------- Düzen ilkelleri ---------- */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell-narrow { max-width: var(--shell-narrow); }

.section { padding-block: var(--space-section); position: relative; }
.section-tight { padding-block: clamp(2.5rem, 1.8rem + 3vw, 4.5rem); }

.tinted { background: var(--paper-2); }
.tinted-deep { background: var(--paper-3); }

/* ---------- Tipografi yardımcıları ---------- */

.eyebrow {
  font-size: var(--text-xs);
  font-weight: var(--weight-strong);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9rem;
}

.section-title {
  font-size: var(--text-2xl);
  margin-bottom: 0.3em;
}

.section-lead {
  font-size: var(--text-lg);
  font-weight: var(--weight-body);
  color: var(--muted);
  max-width: 58ch;
  line-height: 1.55;
}

.script {
  font-family: var(--font-script);
  letter-spacing: 0;
  line-height: 1.2;
}

.tabular { font-variant-numeric: tabular-nums; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 0; left: 50%;
  translate: -50% -140%;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1.2rem;
  font-size: var(--text-sm);
  letter-spacing: var(--track-mid);
  text-transform: uppercase;
  transition: translate var(--dur) var(--ease);
}
.skip-link:focus { translate: -50% 0; }

/* ---------- Görünürlük animasyonu ----------
   İçerik varsayılan olarak görünür; gizleme yalnızca JS çalışıyorsa
   (html.js-anim) devreye girer. Böylece betik takılsa bile bölümler kaybolmaz. */

.js-anim .reveal:not(.is-in) {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
}

.js-anim .reveal {
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}