/* ==========================================================================
   Base — reset, tipografi, layout yardımcıları, aurora zemin, reveal motoru
   ========================================================================== */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
  overflow-x: hidden;
}

body {
  min-height: 100svh;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden ;
}

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

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

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

::selection {
  background: var(--color-primary);
  color: oklch(100% 0 0);
}

/* --- Tipografi ölçeği ------------------------------------------------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-hero);
  line-height: var(--leading-tight);
  font-weight: 700;
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

p {
  text-wrap: pretty;
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

/* --- Layout ----------------------------------------------------------- */

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

.section {
  position: relative;
  padding-block: var(--space-section);
  z-index: var(--z-content);
}

.section--tight {
  padding-block: clamp(3rem, 2rem + 4vw, 5.5rem);
}

.section__head {
  max-width: 44rem;
  margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4.5rem);
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.section__title {
  margin-block: var(--space-md) var(--space-lg);
}

.section__lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 38rem;
}

.section__head--center .section__lead {
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  inset-inline-start: var(--space-md);
  inset-block-start: -100%;
  z-index: var(--z-overlay);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-primary);
  color: oklch(100% 0 0);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: inset-block-start var(--duration-fast) var(--ease-out-expo);
}

.skip-link:focus-visible {
  inset-block-start: var(--space-md);
}

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

/* --- Bölüm etiketi (eyebrow) ------------------------------------------ */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-accent);
}

.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent));
}

.section__head--center .eyebrow::after {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

/* --- Gradyan metin ---------------------------------------------------- */

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --- Aurora zemin ----------------------------------------------------- */

.aurora {
  position: fixed;
  inset: 0;
  z-index: var(--z-aurora);
  overflow: hidden;
  pointer-events: none;
}

.aurora__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  will-change: transform;
}

.aurora__blob--1 {
  width: 46vmax;
  height: 46vmax;
  inset-block-start: -14vmax;
  inset-inline-start: -8vmax;
  background: radial-gradient(circle, oklch(58% 0.24 292 / 0.85), transparent 68%);
  animation: drift-1 26s var(--ease-in-out) infinite;
}

.aurora__blob--2 {
  width: 38vmax;
  height: 38vmax;
  inset-block-start: 18vmax;
  inset-inline-end: -10vmax;
  background: radial-gradient(circle, oklch(72% 0.16 198 / 0.7), transparent 68%);
  animation: drift-2 32s var(--ease-in-out) infinite;
}

.aurora__blob--3 {
  width: 34vmax;
  height: 34vmax;
  inset-block-end: -12vmax;
  inset-inline-start: 26vw;
  background: radial-gradient(circle, oklch(64% 0.2 330 / 0.6), transparent 70%);
  animation: drift-3 38s var(--ease-in-out) infinite;
}

.aurora__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(oklch(100% 0 0 / 0.028) 1px, transparent 1px),
    linear-gradient(90deg, oklch(100% 0 0 / 0.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 10%, transparent 75%);
}

.aurora__vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 120% 90% at 50% 0%, transparent 30%, var(--color-bg-deep) 100%);
}

@keyframes drift-1 {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(8vw, 6vh, 0) scale(1.15);
  }
}

@keyframes drift-2 {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1.1);
  }
  50% {
    transform: translate3d(-7vw, 9vh, 0) scale(0.92);
  }
}

@keyframes drift-3 {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(0.95);
  }
  50% {
    transform: translate3d(6vw, -7vh, 0) scale(1.2);
  }
}

/* --- Scroll reveal ---------------------------------------------------- */

[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity var(--duration-reveal) var(--ease-out-expo),
    transform var(--duration-reveal) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal="left"] {
  transform: translate3d(-26px, 0, 0);
}

[data-reveal="right"] {
  transform: translate3d(26px, 0, 0);
}

[data-reveal="scale"] {
  transform: scale(0.94);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* --- Reduced motion --------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .aurora__blob {
    animation: none;
  }
}