/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ul[class], ol[class] { padding: 0; list-style: none; }
html { -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   DESIGN TOKENS — açık tema (varsayılan)
   ============================================================ */
:root {
  --color-bg: #f4f1ea;
  --color-bg-raised: #fbfaf6;
  --color-ink: #16150f;
  --color-ink-soft: #56534a;
  --color-ink-faint: #8b8779;
  --color-line: rgba(22, 21, 15, 0.14);
  --color-line-strong: rgba(22, 21, 15, 0.4);
  --color-signal: #b3491a;
  --color-signal-strong: #8a3812;
  --color-signal-soft: rgba(179, 73, 26, 0.12);
  --color-signal-on: #fbfaf6;
  --shadow-glow: none;

  --font-display: ui-serif, Georgia, "Times New Roman", serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --fs-display: clamp(2.75rem, 2rem + 3.2vw, 5.25rem);
  --fs-h1: clamp(2rem, 1.6rem + 1.6vw, 3.1rem);
  --fs-h2: clamp(1.4rem, 1.2rem + 0.9vw, 1.9rem);
  --fs-h3: 1.15rem;
  --fs-body: 1rem;
  --fs-small: 0.8125rem;
  --fs-micro: 0.6875rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  --index-width: 15.5rem;
  --index-width-collapsed: 3.75rem;
  --content-max: 58rem;
  --radius: 2px;
  --grid-line: color-mix(in srgb, var(--color-ink) 6%, transparent);
}

:root[data-theme="dark"] {
  --color-bg: #131210;
  --color-bg-raised: #1b1917;
  --color-ink: #f1eee4;
  --color-ink-soft: #b3ae9f;
  --color-ink-faint: #78746a;
  --color-line: rgba(241, 238, 228, 0.14);
  --color-line-strong: rgba(241, 238, 228, 0.34);
  --color-signal: #ff7c3f;
  --color-signal-strong: #ffab7e;
  --color-signal-soft: rgba(255, 124, 63, 0.14);
  --color-signal-on: #131210;
  --shadow-glow: 0 0 0 1px rgba(255, 124, 63, 0.35), 0 0 28px rgba(255, 124, 63, 0.18);
  --grid-line: color-mix(in srgb, var(--color-ink) 8%, transparent);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #131210;
    --color-bg-raised: #1b1917;
    --color-ink: #f1eee4;
    --color-ink-soft: #b3ae9f;
    --color-ink-faint: #78746a;
    --color-line: rgba(241, 238, 228, 0.14);
    --color-line-strong: rgba(241, 238, 228, 0.34);
    --color-signal: #ff7c3f;
    --color-signal-strong: #ffab7e;
    --color-signal-soft: rgba(255, 124, 63, 0.14);
    --color-signal-on: #131210;
    --shadow-glow: 0 0 0 1px rgba(255, 124, 63, 0.35), 0 0 28px rgba(255, 124, 63, 0.18);
    --grid-line: color-mix(in srgb, var(--color-ink) 8%, transparent);
  }
}

/* ============================================================
   TEMEL GÖVDE
   ============================================================ */
body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  transition: background-color 0.25s ease, color 0.25s ease;
}

::selection { background: var(--color-signal); color: var(--color-signal-on); }

:focus-visible {
  outline: 2px solid var(--color-signal);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 200;
  padding: var(--space-3) var(--space-4);
  background: var(--color-signal);
  color: var(--color-signal-on);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ============================================================
   YARDIMCI SINIFLAR
   ============================================================ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.eyebrow::before {
  content: "";
  width: 0.5rem;
  height: 1px;
  background: var(--color-signal);
}

.mono { font-family: var(--font-mono); }

.grid-field {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 2.75rem 2.75rem;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

html.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
html.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.corner-frame {
  position: relative;
}
.corner-frame::before,
.corner-frame::after,
.corner-frame > .corner-frame__tr,
.corner-frame > .corner-frame__bl {
  content: "";
  position: absolute;
  width: 0.7rem;
  height: 0.7rem;
  border-color: var(--color-line-strong);
  border-style: solid;
  border-width: 0;
}
.corner-frame::before { top: -1px; left: -1px; border-top-width: 1.5px; border-left-width: 1.5px; }
.corner-frame::after { bottom: -1px; right: -1px; border-bottom-width: 1.5px; border-right-width: 1.5px; }
.corner-frame__tr { top: -1px; right: -1px; border-top-width: 1.5px; border-right-width: 1.5px; }
.corner-frame__bl { bottom: -1px; left: -1px; border-bottom-width: 1.5px; border-left-width: 1.5px; }