/* ═══ Temel: sıfırlama, tipografi, ortak bileşenler ═══ */

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

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

body {
  min-height: 100svh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.62;
  color: var(--fg);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

/* Sahne destesi olan sayfalar sayfa kaydırmasını devralır */
body.deck-page,
body.deck-page > .deck {
  height: 100svh;
  overflow: hidden;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  top: -120%;
  left: 1rem;
  z-index: var(--z-intro);
  padding: 0.7rem 1.3rem;
  background: var(--terracotta);
  color: #fff;
  border-radius: 999px;
  font-size: var(--text-ui);
  font-weight: 700;
}
.skip-link:focus-visible {
  top: 1rem;
}

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

/* ═══ Tipografi kalıpları ═══ */

.kicker {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1em;
  font-size: var(--text-kicker);
  font-weight: 700;
  letter-spacing: 0.44em;
  text-transform: uppercase;
  color: var(--accent);
}
.kicker::before,
.kicker::after {
  content: "";
  width: clamp(1.4rem, 3vw, 3rem);
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}

.headline {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 560;
  line-height: 1.02;
  letter-spacing: -0.022em;
  text-wrap: balance;
}
.headline em {
  display: block;
  margin-top: -0.12em;
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.lead {
  max-width: 54ch;
  margin-inline: auto;
  font-size: var(--text-lead);
  line-height: 1.75;
  color: var(--fg-soft);
  font-weight: 500;
}

/* ═══ Butonlar ═══ */

.btn {
  --btn-fg: #fff;
  --btn-bg: var(--terracotta);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.8em;
  padding: 1.05em 2.5em;
  border-radius: 999px;
  font-size: 0.84rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--btn-fg);
  background: var(--btn-bg);
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow-soft);
  transition: transform var(--dur-ui) var(--ease-back),
    box-shadow var(--dur-ui) var(--ease-soft);
}
/* Dolgu, imlecin girdiği yönden süpürerek gelir */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--clay-800);
  transform: scaleY(0);
  transform-origin: bottom center;
  transition: transform 0.45s var(--ease-expo);
}
.btn:hover::before,
.btn:focus-visible::before {
  transform: scaleY(1);
}
.btn:hover,
.btn:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}
.btn:active {
  transform: translateY(-1px) scale(0.985);
}
.btn .ok {
  width: 1.1em;
  height: 1.1em;
  transition: transform var(--dur-ui) var(--ease-back);
}
.btn:hover .ok {
  transform: translateX(4px);
}

.btn-hayalet {
  --btn-fg: var(--fg);
  --btn-bg: transparent;
  border: 1.5px solid var(--line);
  box-shadow: none;
}
.btn-hayalet::before {
  background: var(--accent);
}
.btn-hayalet:hover,
.btn-hayalet:focus-visible {
  --btn-fg: #fff;
  border-color: transparent;
  box-shadow: var(--shadow-soft);
}
[data-tone="dark"] .btn-hayalet:hover {
  --btn-fg: var(--clay-800);
}

/* ═══ Doku katmanı ═══ */

.grain {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-chrome) + 4);
  width: 100%;
  height: 100%;
  opacity: 0.045;
  pointer-events: none;
  mix-blend-mode: multiply;
}

/* ═══ Hareket azaltma ═══ */

@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;
  }
}