/* ============================================================
   İMDİ · sıfırlama, tipografi rolleri, düğmeler
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  background: var(--paper);
  color: var(--fg);
  font-family: var(--font-text);
  font-size: var(--t-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

::selection { background: var(--red); color: #fff; }

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 6px;
}

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

.skip-link {
  position: fixed;
  top: var(--s-3); left: var(--s-3);
  z-index: 1000;
  padding: var(--s-2) var(--s-4);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--t-small);
  transform: translateY(-200%);
  transition: transform var(--dur-fast) var(--ease-out);
}
.skip-link:focus-visible { transform: none; }

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

.section {
  position: relative;
  z-index: var(--z-content);
  background: var(--surface);
  color: var(--fg);
  padding-block: var(--s-9);
}

/* ---------- tipografi rolleri ---------- */
.hero-title,
.display,
.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.hero-title { font-size: var(--t-hero); line-height: 1.02; }
.display { font-size: var(--t-display); line-height: 1.06; }
.section-title { font-size: var(--t-section); line-height: 1.1; }

.hero-title em,
.display em,
.section-title em {
  font-style: italic;
  color: var(--red);
}
[data-tone="dark"] .section-title em,
[data-tone="dark"] .display em { color: var(--red-soft); }

.lead {
  font-size: var(--t-lead);
  line-height: 1.55;
  color: var(--fg-dim);
  text-wrap: pretty;
}

.label {
  font-size: var(--t-label);
  font-weight: 500;
  line-height: 1.2;
  color: var(--fg-dim);
}
.label--red { color: var(--red); }
[data-tone="dark"] .label--red { color: var(--red-soft); }

/* ---------- düğmeler ----------
   Tek biçim: 48 px yüksek hap, cümle düzeninde yazı. Dolu = kırmızı
   (birincil), mürekkep = ikincil ama dolu, çizgi = üçüncül. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 3rem;
  padding: 0 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.btn:active { transform: scale(0.98); }
.btn svg { width: 1.1em; height: 1.1em; flex: none; }

.btn--solid { background: var(--red); color: #fff; }
.btn--solid:hover { background: var(--red-hover); }

.btn--ink { background: var(--btn-bg); color: var(--btn-fg); }
.btn--ink:hover { background: color-mix(in srgb, var(--btn-bg) 86%, var(--surface)); }

.btn--line { border-color: var(--line-2); color: var(--fg); background: transparent; }
.btn--line:hover { background: color-mix(in srgb, var(--fg) 6%, transparent); border-color: var(--fg-faint); }

.btn--sm { min-height: 2.5rem; padding: 0 1.1rem; font-size: 0.9375rem; }

/* Metin bağlantısı: ok ile */
.link {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-weight: 500;
  color: var(--fg);
}
.link::after {
  content: "→";
  transition: transform var(--dur-fast) var(--ease-out);
}
.link:hover::after { transform: translateX(3px); }

/* ---------- açılış hareketi ----------
   İçerik JS olmadan da görünür: gizleme yalnız JS hazır olunca
   (`html[data-ready]`) ve öğe henüz ekrana girmemişken. */
html[data-ready] [data-reveal]:not(.is-in) {
  opacity: 0;
  transform: translateY(16px);
}
[data-reveal] {
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}

@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;
  }
  html[data-ready] [data-reveal]:not(.is-in) { opacity: 1; transform: none; }
}