/* ==========================================================================
   Base — reset, tipografi, sayfa atmosferi (grid + grain), erişilebilirlik
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 8.5rem; /* mobil: iki satirli yapiskan baslik */
}

body {
  margin: 0;
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-display);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.02em; line-height: var(--leading-snug); }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

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

/* --- Atmosfer: blueprint ızgara + film grain ---------------------------- */
/* Sabit, pointer-events yok; kompozitörde kalır, layout'a dokunmaz.        */

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: var(--z-grid);
  pointer-events: none;
}

.atmosphere__grid {
  position: absolute;
  inset: -1px;
  background-image:
    linear-gradient(to right,  var(--c-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--c-line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 120% 85% at 50% 0%, #000 5%, transparent 78%);
}

.atmosphere__glow {
  position: absolute;
  top: -22vh;
  left: 50%;
  width: min(1100px, 130vw);
  aspect-ratio: 2 / 1;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, var(--c-accent-soft), transparent 66%);
  opacity: 0.75;
  filter: blur(12px);
}

.atmosphere__grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* --- Odak & atlama bağlantısı ------------------------------------------ */

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

.skip-link {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: var(--z-skip);
  padding: 0.6rem 1rem;
  background: var(--c-accent);
  color: var(--c-void);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
  transform: translateY(-180%);
  transition: transform var(--dur-fast) var(--ease-out);
}
.skip-link:focus-visible { transform: translateY(0); }

/* --- Seçim -------------------------------------------------------------- */
::selection { background: var(--c-accent); color: var(--c-void); }

/* --- Kaydırma çubuğu ---------------------------------------------------- */
::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: var(--c-void); }
::-webkit-scrollbar-thumb { background: var(--c-line-hi); border: 3px solid var(--c-void); border-radius: var(--radius-pill); }
::-webkit-scrollbar-thumb:hover { background: var(--c-text-dim); }

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

/* --- Azaltılmış hareket ------------------------------------------------- */
@media (min-width: 860px) {
  html { scroll-padding-top: 5.5rem; }
}

@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;
  }
}