/* ==========================================================================
   ATAHAN OTOMASYON MAKİNA — main.css
   Token sistemi + temel tipografi + global yardımcılar.
   KURAL: Renk / ölçü / gölge hardcode ETME. Önce token ekle, sonra kullan.
   ========================================================================== */

:root {
  /* --- Marka renkleri (logodan ölçüldü) --------------------------------- */
  --color-primary: #C49B27;          /* logo altın üçgeni */
  --color-primary-bright: #DDB54A;
  --color-primary-deep: #9A7719;
  --color-primary-text: #806217;      /* açık zeminde küçük altın metin (AA) */
  --color-secondary: #3F3E3F;        /* logo grafit */
  --color-accent: var(--color-primary);

  /* --- Nötr skala -------------------------------------------------------- */
  --color-dark: #111113;
  --color-dark-2: #18181B;
  --color-dark-3: #232327;
  --color-light: #F4F3EF;
  --color-light-2: #EAE8E2;
  --color-white: #FFFFFF;
  --color-text: #17171A;
  --color-muted: #5E5E66;
  --color-on-dark: #F4F3EF;
  --color-muted-on-dark: #A4A4AC;
  --color-line: rgba(17, 17, 19, .12);
  --color-line-strong: rgba(17, 17, 19, .22);
  --color-line-on-dark: rgba(255, 255, 255, .12);
  --color-line-on-dark-strong: rgba(255, 255, 255, .24);
  --color-overlay: rgba(10, 10, 12, .62);
  --color-glass: rgba(17, 17, 19, .55);
  --color-glass-light: rgba(255, 255, 255, .08);
  --color-text-on-media: rgba(255, 255, 255, .82);
  --color-stroke-on-media: rgba(255, 255, 255, .7);
  --color-header-scrolled: rgba(244, 243, 239, .9);
  --color-bar-dark: rgba(17, 17, 19, .82);
  --focus-ring: 0 0 0 4px rgba(196, 155, 39, .18);
  --gradient-header: linear-gradient(180deg, rgba(10, 10, 12, .55), rgba(10, 10, 12, 0));
  --color-whatsapp-bright: #25D366;   /* yalnız koyu zeminde ikon */
  --color-primary-soft: rgba(196, 155, 39, .12);
  --color-primary-ring: rgba(196, 155, 39, .45);
  --filter-map: saturate(.7) contrast(1.04);
  --color-danger: #D9534F;
  --color-danger-text: #B42318;      /* açık zeminde hata metni (AA) */

  /* --- STMACH (yalnız STMACH bölümünde) -------------------------------- */
  --color-stmach: #F5821F;
  --color-stmach-slate: #475E69;

  /* --- Gradient & glow -------------------------------------------------- */
  --gradient-gold: linear-gradient(135deg, var(--color-primary-bright) 0%, var(--color-primary) 55%, var(--color-primary-deep) 100%);
  --gradient-dark: linear-gradient(180deg, var(--color-dark-2) 0%, var(--color-dark) 100%);
  --gradient-hero: linear-gradient(90deg, rgba(10, 10, 12, .88) 0%, rgba(10, 10, 12, .55) 45%, rgba(10, 10, 12, .15) 100%);
  --gradient-hero-bottom: linear-gradient(0deg, rgba(10, 10, 12, .9) 0%, rgba(10, 10, 12, 0) 45%);
  --gradient-image-bottom: linear-gradient(0deg, rgba(10, 10, 12, .78) 0%, rgba(10, 10, 12, 0) 60%);
  --glow-gold: 0 0 0 1px rgba(196, 155, 39, .35), 0 14px 40px -12px rgba(196, 155, 39, .55);
  --glow-gold-soft: radial-gradient(closest-side, rgba(196, 155, 39, .22), rgba(196, 155, 39, 0));
  --glow-stmach-soft: radial-gradient(closest-side, rgba(245, 130, 31, .22), rgba(245, 130, 31, 0));

  /* --- Köşe -------------------------------------------------------------- */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* --- Gölge ------------------------------------------------------------- */
  --shadow: 0 1px 2px rgba(17, 17, 19, .06), 0 4px 14px rgba(17, 17, 19, .06);
  --shadow-md: 0 10px 30px -12px rgba(17, 17, 19, .25);
  --shadow-lg: 0 30px 80px -30px rgba(17, 17, 19, .45);
  --shadow-map-edge: inset 24px 0 32px -24px rgba(10, 10, 12, .55);
  --shadow-map-edge-top: inset 0 24px 32px -24px rgba(10, 10, 12, .55);

  /* --- Boşluk ------------------------------------------------------------ */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;
  --section-y: clamp(56px, 6vw, 96px);
  --gutter: clamp(20px, 4vw, 40px);
  --container-max: 1360px;
  --header-h: 84px;
  --header-h-scrolled: 68px;

  /* --- Tipografi --------------------------------------------------------- */
  --ff-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --fs-display: clamp(2rem, 1.1rem + 2.8vw, 3.5rem);
  --fs-h2: clamp(1.75rem, 1.2rem + 1.6vw, 2.625rem);
  --fs-h3: clamp(1.125rem, 1rem + .45vw, 1.375rem);
  --fs-h4: 1.0625rem;
  --fs-statement: clamp(1.25rem, 1rem + 1vw, 1.875rem);
  --fs-lead: clamp(1rem, .95rem + .2vw, 1.125rem);
  --fs-hero-lead: clamp(1rem, .95rem + .2vw, 1.125rem);
  --fs-body: 1rem;
  --fs-small: .875rem;
  --fs-xs: .75rem;
  --fs-number: clamp(2.5rem, 2rem + 1.8vw, 4rem);
  --lh-tight: 1.05;
  --lh-heading: 1.15;
  --lh-body: 1.65;
  --ls-tight: -.03em;
  --ls-heading: -.02em;
  --ls-caps: .14em;

  /* --- Hareket ----------------------------------------------------------- */
  --ease: cubic-bezier(.2, .7, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --dur-fast: .2s;
  --dur: .45s;
  --dur-slow: .9s;

  /* --- Katman ------------------------------------------------------------ */
  --z-header: 1000;
  --z-drawer: 1100;
  --z-skip: 1200;

  /* Bootstrap değişkenlerini markaya bağla */
  --bs-body-font-family: var(--ff-body);
  --bs-body-color: var(--color-text);
  --bs-body-bg: var(--color-light);
  --bs-link-color-rgb: 23, 23, 26;
  --bs-border-color: var(--color-line);
}

/* ==========================================================================
   Temel
   ========================================================================== */
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h-scrolled); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--ff-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'cv11', 'ss01';
}

body.is-locked { overflow: hidden; }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--ff-body);
  font-weight: 700;
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-heading);
  margin: 0;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; transition: color var(--dur-fast) var(--ease); }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }
address { font-style: normal; margin: 0; }

::selection { background: var(--color-primary); color: var(--color-dark); }

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

/* Skip link */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: var(--z-skip);
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: var(--color-dark);
  font-weight: 600;
  border-radius: var(--radius);
  transform: translateY(-200%);
  transition: transform var(--dur-fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ==========================================================================
   Layout yardımcıları
   ========================================================================== */
.container {
  --bs-gutter-x: calc(var(--gutter) * 2);
  max-width: var(--container-max);
}

.section {
  position: relative;
  padding-block: var(--section-y);
}
.section--dark {
  background: var(--color-dark);
  color: var(--color-on-dark);
}
.section--paper { background: var(--color-light); }
.section--white { background: var(--color-white); }

.section__head {
  display: grid;
  gap: var(--space-5);
  margin-bottom: clamp(var(--space-6), 4vw, var(--space-8));
}
@media (min-width: 992px) {
  .section__head--split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--space-8);
  }
}
.section__title {
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  font-weight: 700;
}
.section__lead {
  font-size: var(--fs-lead);
  color: var(--color-muted);
  max-width: 56ch;
}
.section--dark .section__lead { color: var(--color-muted-on-dark); }

/* Eyebrow — logodaki altın üçgen motifi */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--color-muted);
}
.eyebrow::before {
  content: '';
  width: 10px;
  height: 9px;
  background: var(--color-primary);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  flex: none;
}
.section--dark .eyebrow,
.eyebrow--light { color: var(--color-muted-on-dark); }

.text-gold { color: var(--color-primary); }
.section--paper .text-gold,
.section--white .text-gold { color: var(--color-primary-text); } /* açık zeminde AA (mobilde küçük metin) */

/* ==========================================================================
   Butonlar — .btn-at (Bootstrap .btn ile çakışmasın diye ayrı blok)
   ========================================================================== */
.btn-at {
  --btn-bg: transparent;
  --btn-fg: currentColor;
  --btn-border: currentColor;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 48px;
  padding: 0 var(--space-6);
  border: 1px solid var(--btn-border);
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--ff-body);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.btn-at svg {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--dur-fast) var(--ease);
}
.btn-at svg.icon-fill { fill: currentColor; stroke: none; }
.btn-at:hover svg.icon-arrow { transform: translateX(4px); }
.btn-at:active { transform: translateY(1px); }

/* Birincil buton — koyu grafit dolgu, ince altın çerçeve, altın ok.
   Koyu zeminlerde (hero, CTA, iletişim paneli, drawer) kullanılır. */
.btn-at--primary {
  --btn-fg: var(--color-white);
  --btn-border: var(--color-primary-ring);
  --btn-bg: var(--color-dark);
  box-shadow: 0 0 0 0 transparent;
}
.btn-at--primary svg.icon-arrow { stroke: var(--color-primary); }
.btn-at--primary:hover { --btn-border: var(--color-primary); --btn-bg: var(--color-dark-3); color: var(--color-white); box-shadow: var(--glow-gold); }

.btn-at--ghost-light {
  --btn-fg: var(--color-white);
  --btn-border: var(--color-line-on-dark-strong);
  background: var(--color-glass-light);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.btn-at--ghost-light:hover { --btn-border: var(--color-white); color: var(--color-white); }

.btn-at--ghost-dark {
  --btn-fg: var(--color-text);
  --btn-border: var(--color-line-strong);
}
.btn-at--ghost-dark:hover { --btn-border: var(--color-text); background: var(--color-text); color: var(--color-white); }

.btn-at--dark {
  --btn-fg: var(--color-white);
  --btn-border: var(--color-dark);
  --btn-bg: var(--color-dark);
}
.btn-at--dark:hover { --btn-bg: var(--color-dark-3); color: var(--color-white); }

.btn-at--sm { min-height: 42px; padding: 0 var(--space-5); font-size: var(--fs-xs); }
.btn-at--block { width: 100%; }

/* Metin linki — ok ile */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--fs-small);
  letter-spacing: .04em;
  text-transform: uppercase;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.link-arrow svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; transition: transform var(--dur-fast) var(--ease); }
.link-arrow:hover svg { transform: translate(3px, -3px); }

/* ==========================================================================
   Medya
   ========================================================================== */
.media {
  position: relative;
  overflow: hidden;
  background: var(--color-dark-3);
}
.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   Scroll reveal — [data-reveal]
   JS yoksa / reduced-motion ise içerik direkt görünür.
   ========================================================================== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
}