/*
  Visual Identity:
  Palette: #29 — ebony, pomegranate, trinidad, wheat, matisse, sandy-brown, cloud-burst, cognac
  Typography: Geometric + Humanist (Urbanist + Work Sans)
  Spatial: Negative Space Art
  Texture: Dot/Line Patterns
  Animation: Scroll-Triggered Scenes
*/

@import url('https://fonts.googleapis.com/css2?family=Urbanist:wght@400;500;600;700;800&family=Work+Sans:wght@400;500;600&display=swap');

@layer reset, base, layout, components, animations, utilities;

/* ========================================
   RESET
   ======================================== */
@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

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

  body {
    min-block-size: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
  }

  img,
  picture,
  svg {
    display: block;
    max-inline-size: 100%;
    block-size: auto;
  }

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

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

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

  ul,
  ol {
    list-style: none;
  }

  fieldset {
    border: none;
  }

  table {
    border-collapse: collapse;
    border-spacing: 0;
  }

  details summary {
    cursor: pointer;
  }

  details summary::-webkit-details-marker {
    display: none;
  }
}

/* ========================================
   BASE — Custom Properties + Typography
   ======================================== */
@layer base {
  :root {
    /* ---- Palette (8 from dice.json) ---- */
    --color-brand: #00071B;
    --color-accent: #E22B06;
    --color-flame: #EC5812;
    --color-light: #EDD1A6;
    --color-trust: #2A72AF;
    --color-warm: #F5A15F;
    --color-deep: #1B3259;
    --color-rich: #A03F1E;

    /* ---- Surfaces (derived) ---- */
    --color-surface: color-mix(in srgb, var(--color-light) 8%, white);
    --color-surface-alt: color-mix(in srgb, var(--color-light) 18%, white);
    --color-surface-dark: var(--color-brand);
    --color-surface-deep: var(--color-deep);

    /* ---- Text (derived) ---- */
    --color-text: var(--color-brand);
    --color-text-soft: color-mix(in srgb, var(--color-brand) 65%, var(--color-light));
    --color-text-inverse: color-mix(in srgb, var(--color-light) 88%, white);

    /* ---- Borders (derived) ---- */
    --color-border: color-mix(in srgb, var(--color-brand) 10%, var(--color-light));
    --color-border-strong: color-mix(in srgb, var(--color-brand) 22%, var(--color-light));

    /* ---- Typography ---- */
    --font-display: 'Urbanist', system-ui, sans-serif;
    --font-body: 'Work Sans', system-ui, sans-serif;

    --size-display: clamp(2.75rem, 5vw + 1rem, 4.5rem);
    --size-h1: clamp(2.25rem, 4vw + 0.5rem, 3.75rem);
    --size-h2: clamp(1.75rem, 3vw + 0.25rem, 2.75rem);
    --size-h3: clamp(1.15rem, 1.5vw + 0.25rem, 1.4rem);
    --size-h4: clamp(0.95rem, 1vw + 0.2rem, 1.1rem);
    --size-body: clamp(1rem, 0.5vw + 0.85rem, 1.125rem);
    --size-small: clamp(0.8rem, 0.5vw + 0.65rem, 0.9rem);
    --size-xs: clamp(0.7rem, 0.4vw + 0.55rem, 0.8rem);

    --leading-tight: 1.05;
    --leading-snug: 1.25;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.04em;
    --tracking-ultra: 0.1em;

    /* ---- Spacing (airy density) ---- */
    --space-3xs: clamp(0.125rem, 0.25vw, 0.25rem);
    --space-2xs: clamp(0.25rem, 0.5vw, 0.375rem);
    --space-xs: clamp(0.5rem, 0.75vw, 0.625rem);
    --space-sm: clamp(0.75rem, 1vw, 1rem);
    --space-md: clamp(1rem, 2vw, 1.5rem);
    --space-lg: clamp(1.5rem, 3vw, 2.5rem);
    --space-xl: clamp(2.5rem, 5vw, 4rem);
    --space-2xl: clamp(4rem, 8vw, 7rem);
    --space-3xl: clamp(6rem, 12vw, 10rem);

    /* ---- Layout ---- */
    --content-width: 72rem;
    --content-narrow: 52rem;

    /* ---- Radius (geometric: sharp) ---- */
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;

    /* ---- Shadows (subtle depth) ---- */
    --shadow-sm: 0 1px 2px color-mix(in srgb, var(--color-brand) 6%, transparent);
    --shadow-md: 0 2px 8px color-mix(in srgb, var(--color-brand) 8%, transparent);
    --shadow-lg: 0 4px 16px color-mix(in srgb, var(--color-brand) 10%, transparent);

    /* ---- Animation ---- */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-snappy: cubic-bezier(0.2, 0, 0, 1);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 600ms;
    --duration-dramatic: 1200ms;

    /* ---- Z-index ---- */
    --z-base: 1;
    --z-header: 100;
    --z-backdrop: 200;
    --z-mobile-nav: 250;
    --z-nav-toggle: 300;
    --z-cookie: 400;
    --z-skip: 500;
  }

  body {
    font-family: var(--font-body);
    font-size: var(--size-body);
    font-weight: 400;
    line-height: var(--leading-normal);
    color: var(--color-text);
    background-color: var(--color-surface);
  }

  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--color-text);
    text-wrap: balance;
  }

  h1 {
    font-size: var(--size-h1);
    font-weight: 800;
  }

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

  h3 {
    font-size: var(--size-h3);
    font-weight: 600;
    line-height: var(--leading-snug);
    letter-spacing: var(--tracking-normal);
  }

  h4 {
    font-size: var(--size-h4);
    font-weight: 600;
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
  }

  p {
    max-inline-size: 65ch;
    color: var(--color-text-soft);
  }

  a:where(:not([class])) {
    color: var(--color-trust);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.15em;
    transition: color var(--duration-fast) var(--ease-smooth);
  }

  a:where(:not([class])):hover {
    color: var(--color-accent);
  }

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

  ::selection {
    background-color: color-mix(in srgb, var(--color-trust) 25%, transparent);
    color: var(--color-text);
  }

  :focus-visible {
    outline: 2px solid var(--color-trust);
    outline-offset: 3px;
  }
}

/* ========================================
   LAYOUT — Containers + Structure
   ======================================== */
@layer layout {
  .content-wrap {
    max-inline-size: var(--content-width);
    margin-inline: auto;
    padding-inline: var(--space-lg);
  }

  .content-narrow {
    max-inline-size: var(--content-narrow);
    margin-inline: auto;
    padding-inline: var(--space-lg);
  }

  main > section {
    position: relative;
    overflow: hidden;
  }
}

/* ========================================
   COMPONENTS
   ======================================== */
@layer components {

  /* ---- Skip Link ---- */
  .skip-link {
    position: fixed;
    inset-block-start: var(--space-sm);
    inset-inline-start: var(--space-sm);
    z-index: var(--z-skip);
    padding: var(--space-xs) var(--space-md);
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: var(--size-small);
    border-radius: var(--radius-sm);
    transform: translateY(-200%);
    transition: transform var(--duration-normal) var(--ease-out);
  }

  .skip-link:focus {
    transform: translateY(0);
  }

  /* ---- Buttons ---- */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--size-body);
    line-height: var(--leading-snug);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
    transition:
      background-color var(--duration-fast) var(--ease-smooth),
      border-color var(--duration-fast) var(--ease-smooth),
      color var(--duration-fast) var(--ease-smooth);
  }

  .btn-primary:hover,
  .btn-primary:focus-visible {
    background-color: var(--color-rich);
    border-color: var(--color-rich);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background-color: transparent;
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--size-body);
    line-height: var(--leading-snug);
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
    transition:
      background-color var(--duration-fast) var(--ease-smooth),
      border-color var(--duration-fast) var(--ease-smooth),
      color var(--duration-fast) var(--ease-smooth);
  }

  .btn-secondary:hover,
  .btn-secondary:focus-visible {
    background-color: var(--color-brand);
    border-color: var(--color-brand);
    color: var(--color-text-inverse);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background-color: transparent;
    color: var(--color-text-inverse);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--size-small);
    line-height: var(--leading-snug);
    border: 1px solid color-mix(in srgb, var(--color-text-inverse) 40%, transparent);
    border-radius: var(--radius-sm);
    text-decoration: none;
    white-space: nowrap;
    transition:
      background-color var(--duration-fast) var(--ease-smooth),
      border-color var(--duration-fast) var(--ease-smooth);
  }

  .btn-ghost:hover,
  .btn-ghost:focus-visible {
    background-color: color-mix(in srgb, var(--color-text-inverse) 12%, transparent);
    border-color: var(--color-text-inverse);
  }

  /* ---- Icons (SVG sprite) ---- */
  .icon {
    width: 1.5em;
    height: 1.5em;
    fill: currentColor;
    flex-shrink: 0;
    vertical-align: middle;
  }

  .icon-sm {
    width: 1em;
    height: 1em;
  }

  .icon-lg {
    width: 2em;
    height: 2em;
  }

  /* ---- Forms ---- */
  .form-alan {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
  }

  .form-alan label {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--size-small);
    color: var(--color-text);
  }

  .form-alan input,
  .form-alan select,
  .form-alan textarea {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--size-body);
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--duration-fast) var(--ease-smooth),
                box-shadow var(--duration-fast) var(--ease-smooth);
  }

  .form-alan input::placeholder,
  .form-alan textarea::placeholder {
    color: var(--color-text-soft);
    opacity: 0.5;
  }

  .form-alan input:focus,
  .form-alan select:focus,
  .form-alan textarea:focus {
    outline: none;
    border-color: var(--color-trust);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-trust) 15%, transparent);
  }

  .form-alan select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24'%3E%3Cpath fill='%2300071B' d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-sm) center;
    padding-inline-end: calc(var(--space-lg) + var(--space-sm));
  }

  .form-onay {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .form-onay input[type="checkbox"] {
    flex-shrink: 0;
    width: 1.125rem;
    height: 1.125rem;
    margin-block-start: 0.15em;
    accent-color: var(--color-accent);
  }

  .form-onay label {
    font-size: var(--size-small);
    line-height: var(--leading-normal);
    color: var(--color-text-soft);
  }

  .form-onay label a {
    color: var(--color-trust);
    text-decoration: underline;
    text-underline-offset: 0.15em;
  }

  .form-onay label a:hover {
    color: var(--color-accent);
  }

  /* ---- Header ---- */
  .site-header {
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    z-index: var(--z-header);
    padding-block: var(--space-sm);
    color: var(--color-text-inverse);
    transition:
      background-color var(--duration-normal) var(--ease-smooth),
      color var(--duration-normal) var(--ease-smooth),
      box-shadow var(--duration-normal) var(--ease-smooth);
  }

  .site-header.is-scrolled {
    background-color: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
  }

  .header-wrap {
    max-inline-size: var(--content-width);
    margin-inline: auto;
    padding-inline: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
  }

  .site-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
  }

  .site-logo img {
    block-size: clamp(28px, 3vw, 38px);
    inline-size: auto;
  }

  .desktop-nav {
    display: flex;
    align-items: center;
    gap: var(--space-md);
  }

  .desktop-nav a {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--size-small);
    letter-spacing: var(--tracking-wide);
    padding: var(--space-2xs) var(--space-xs);
    transition: opacity var(--duration-fast) var(--ease-smooth);
  }

  .desktop-nav a:hover {
    opacity: 0.7;
  }

  .nav-cta-btn {
    padding: var(--space-xs) var(--space-md) !important;
    background-color: var(--color-accent);
    color: var(--color-text-inverse) !important;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
    letter-spacing: var(--tracking-normal) !important;
    transition:
      background-color var(--duration-fast) var(--ease-smooth),
      opacity var(--duration-fast) var(--ease-smooth) !important;
  }

  .nav-cta-btn:hover {
    background-color: var(--color-rich);
    opacity: 1 !important;
  }

  /* ---- Burger (base + animation #29 X Smooth) ---- */
  .burger {
    display: none;
    width: 44px;
    height: 44px;
    position: relative;
    z-index: var(--z-nav-toggle);
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .burger span {
    position: absolute;
    left: 11px;
    width: 22px;
    height: 2px;
    background-color: currentColor;
    border-radius: 1px;
    transition:
      transform 0.4s var(--ease-smooth),
      opacity 0.4s var(--ease-smooth),
      top 0.4s var(--ease-smooth),
      bottom 0.4s var(--ease-smooth);
  }

  .burger span:nth-child(1) { top: 13px; }
  .burger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
  .burger span:nth-child(3) { bottom: 13px; }

  /* Animation: #29 X Smooth → aria-expanded */
  .burger[aria-expanded="true"] span:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }

  .burger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .burger[aria-expanded="true"] span:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
  }

  /* ---- Mobile Nav (base — responsive in step 4) ---- */
  .nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: var(--z-backdrop);
    background-color: color-mix(in srgb, var(--color-brand) 65%, transparent);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity var(--duration-normal) var(--ease-smooth),
      visibility var(--duration-normal);
  }

  .nav-backdrop.is-active {
    opacity: 1;
    visibility: visible;
  }

  .mobile-nav {
    position: fixed;
    inset-block-start: 0;
    inset-inline-end: 0;
    z-index: var(--z-mobile-nav);
    display: none;
    flex-direction: column;
    gap: var(--space-xs);
    width: min(320px, 85vw);
    height: 100dvh;
    padding: 5rem var(--space-lg) var(--space-lg);
    background-color: var(--color-surface);
    color: var(--color-text);
    transform: translateX(100%);
    visibility: hidden;
    transition:
      transform var(--duration-slow) var(--ease-out),
      visibility var(--duration-slow);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .mobile-nav.is-open {
    transform: translateX(0);
    visibility: visible;
  }

  .mobile-nav a {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: var(--size-body);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: background-color var(--duration-fast) var(--ease-smooth);
  }

  .mobile-nav a:hover {
    background-color: var(--color-surface-alt);
  }

  .mobile-nav .nav-cta-btn {
    margin-block-start: var(--space-sm);
    text-align: center;
  }

  /* ---- Footer ---- */
  .site-footer {
    background-color: var(--color-surface-dark);
    color: var(--color-text-inverse);
    padding-block: var(--space-2xl) var(--space-lg);
  }

  .footer-wrap {
    max-inline-size: var(--content-width);
    margin-inline: auto;
    padding-inline: var(--space-lg);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl) var(--space-lg);
  }

  .footer-logo-text {
    display: block;
    font-family: var(--font-display);
    font-size: var(--size-h3);
    font-weight: 800;
    letter-spacing: var(--tracking-tight);
    margin-block-end: var(--space-sm);
  }

  .footer-tanim {
    font-size: var(--size-small);
    color: color-mix(in srgb, var(--color-text-inverse) 65%, transparent);
    max-inline-size: 30ch;
  }

  .footer-nav,
  .footer-yasal,
  .footer-iletisim {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xs);
  }

  .footer-nav h4,
  .footer-yasal h4,
  .footer-iletisim h4 {
    color: var(--color-warm);
    margin-block-end: var(--space-xs);
  }

  .footer-nav a,
  .footer-yasal a {
    font-size: var(--size-small);
    color: color-mix(in srgb, var(--color-text-inverse) 75%, transparent);
    transition: color var(--duration-fast) var(--ease-smooth);
  }

  .footer-nav a:hover,
  .footer-yasal a:hover {
    color: var(--color-text-inverse);
  }

  .footer-mail {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--size-small);
    color: color-mix(in srgb, var(--color-text-inverse) 75%, transparent);
    transition: color var(--duration-fast) var(--ease-smooth);
  }

  .footer-mail:hover {
    color: var(--color-text-inverse);
  }

  .footer-alt {
    grid-column: 1 / -1;
    border-block-start: 1px solid color-mix(in srgb, var(--color-text-inverse) 12%, transparent);
    padding-block-start: var(--space-md);
  }

  .footer-alt p {
    font-size: var(--size-xs);
    color: color-mix(in srgb, var(--color-text-inverse) 45%, transparent);
  }

  /* ---- Cookie Popup ---- */
  .cerez-bildirimi {
    position: fixed;
    inset-block-end: 0;
    inset-inline: 0;
    z-index: var(--z-cookie);
    background-color: var(--color-surface-dark);
    color: var(--color-text-inverse);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    box-shadow: 0 -2px 12px color-mix(in srgb, var(--color-brand) 15%, transparent);
  }

  .cerez-bildirimi p {
    font-size: var(--size-small);
    color: color-mix(in srgb, var(--color-text-inverse) 80%, transparent);
    max-inline-size: 55ch;
  }

  .cerez-bildirimi p a {
    color: var(--color-warm);
    text-decoration: underline;
    text-underline-offset: 0.15em;
  }

  .cerez-bildirimi p a:hover {
    color: var(--color-text-inverse);
  }

  .cerez-btn-grup {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
  }

  .cerez-bildirimi .btn-primary {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--size-small);
  }

  /* ---- Scroll to Top ---- */
  .yukari-don {
    position: fixed;
    inset-block-end: var(--space-lg);
    inset-inline-end: var(--space-lg);
    z-index: var(--z-base);
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    background-color: var(--color-deep);
    color: var(--color-text-inverse);
    border-radius: var(--radius-sm);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity var(--duration-normal) var(--ease-smooth),
      visibility var(--duration-normal),
      background-color var(--duration-fast) var(--ease-smooth);
  }

  .yukari-don.is-visible {
    opacity: 1;
    visibility: visible;
  }

  .yukari-don:hover {
    background-color: var(--color-accent);
  }

  /* ---- Texture Patterns (reusable) ---- */
  .pattern-dots {
    position: relative;
  }

  .pattern-dots::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, var(--color-brand) 1px, transparent 1px);
    background-size: 22px 22px;
    opacity: 0.035;
    pointer-events: none;
    z-index: 0;
  }

  .pattern-dots > * {
    position: relative;
    z-index: 1;
  }

  .pattern-lines {
    position: relative;
  }

  .pattern-lines::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 16px,
      var(--color-brand) 16px,
      var(--color-brand) 17px
    );
    opacity: 0.025;
    pointer-events: none;
    z-index: 0;
  }

  .pattern-lines > * {
    position: relative;
    z-index: 1;
  }
}

/* ========================================
   ANIMATIONS — Keyframes + Scroll-Triggered
   ======================================== */
@layer animations {

  @keyframes drift-in-from-below {
    from {
      opacity: 0;
      transform: translateY(2rem);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes slide-in-left {
    from {
      opacity: 0;
      transform: translateX(-2rem);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes scale-in {
    from {
      opacity: 0;
      transform: scale(0.92);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }

  /* Scroll-triggered entrance — elements start hidden, JS adds .is-revealed */
  [data-animate] {
    opacity: 0;
    transform: translateY(1.5rem);
    transition:
      opacity var(--duration-slow) var(--ease-out),
      transform var(--duration-slow) var(--ease-out);
    transition-delay: calc(var(--stagger, 0) * 80ms);
  }

  [data-animate].is-revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   UTILITIES — Accessibility + Dark Mode
   ======================================== */
@layer utilities {

  /* Screen reader only */
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  /* Reduced motion — mandatory */
  @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;
    }

    [data-animate] {
      opacity: 1 !important;
      transform: none !important;
      transition: none !important;
    }
  }

  /* Dark mode — auto */
  @media (prefers-color-scheme: dark) {
    :root {
      --color-surface: color-mix(in srgb, var(--color-brand) 92%, var(--color-deep));
      --color-surface-alt: color-mix(in srgb, var(--color-brand) 82%, var(--color-deep));
      --color-text: color-mix(in srgb, var(--color-light) 90%, white);
      --color-text-soft: color-mix(in srgb, var(--color-light) 60%, white);
      --color-border: color-mix(in srgb, var(--color-light) 15%, var(--color-brand));
      --color-border-strong: color-mix(in srgb, var(--color-light) 25%, var(--color-brand));
      --color-shadow-base: var(--color-brand);
      --shadow-sm: 0 1px 2px color-mix(in srgb, var(--color-brand) 30%, transparent);
      --shadow-md: 0 2px 8px color-mix(in srgb, var(--color-brand) 35%, transparent);
    }

    h1, h2, h3, h4 {
      color: var(--color-text);
    }

    .site-header.is-scrolled {
      background-color: var(--color-surface);
    }

    .form-alan input,
    .form-alan select,
    .form-alan textarea {
      background-color: var(--color-surface-alt);
    }
  }
}

/* ========================================
   RESPONSIVE — Desktop-first (max-width)
   ======================================== */

html.scroll-locked {
  overflow: hidden;
}

/* ---- Below xl (1280px) ---- */
@media (max-width: 1279px) {
  .footer-wrap {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-marka {
    grid-column: 1 / -1;
  }
}

/* ---- Below lg (1024px) ---- */
@media (max-width: 1023px) {
  .content-wrap,
  .content-narrow {
    padding-inline: var(--space-md);
  }
}

/* ---- Below md (768px) — burger threshold ---- */
@media (max-width: 767px) {
  .desktop-nav {
    display: none;
  }

  .burger {
    display: block;
  }

  .mobile-nav {
    display: flex;
  }

  .footer-wrap {
    grid-template-columns: 1fr 1fr;
  }

  .cerez-bildirimi {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md);
    text-align: center;
  }

  .cerez-btn-grup {
    width: 100%;
    justify-content: center;
  }

  .yukari-don {
    inset-block-end: var(--space-md);
    inset-inline-end: var(--space-md);
    width: 44px;
    height: 44px;
  }
}

/* ---- Below sm (480px) ---- */
@media (max-width: 479px) {
  .footer-wrap {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .cerez-btn-grup {
    flex-direction: column;
  }

  .cerez-bildirimi .btn-primary,
  .cerez-bildirimi .btn-ghost {
    width: 100%;
    justify-content: center;
  }
}