/* ============================================================
   TUNCAY CEYLAN — REKLAM AJANSI
   Ana Stil Dosyası (Reset + Tasarım Sistemi + Layout)
   ============================================================ */

/* ---------- CSS Değişkenleri (Tasarım Token'ları) ---------- */
:root {
  /* Renkler */
  --color-ink: #0A0A0A;
  --color-ink-soft: #1A1A1A;
  --color-muted: #6B6B6B;
  --color-faint: #9A9A9A;
  --color-cream: #F5F1EA;
  --color-bg: #FAFAFA;
  --color-white: #FFFFFF;
  /* Marka rengi (gerçek logo: kırmızı) */
  --color-brand: #ec1c24;
  --color-brand-soft: #ff3b45;
  --color-brand-dark: #c41017;
  /* Geri uyumluluk takma adları (gold -> brand) */
  --color-gold: var(--color-brand);
  --color-gold-soft: var(--color-brand-soft);
  --color-line: rgba(10, 10, 10, 0.08);
  --color-line-strong: rgba(10, 10, 10, 0.16);
  --color-overlay: rgba(10, 10, 10, 0.6);

  /* Tipografi */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;

  /* Tipografi Ölçeği */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.75rem;
  --fs-3xl: 2.5rem;
  --fs-4xl: 3.75rem;
  --fs-5xl: 5.5rem;

  /* Boşluk (Spacing) */
  --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;
  --space-10: 8rem;

  /* Layout */
  --container-max: 1240px;
  --container-pad: 1.5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 999px;

  /* Geçişler */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 0.4s var(--ease);

  /* Header yüksekliği */
  --header-h: 80px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-weight: var(--fw-regular);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--color-ink-soft);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol { list-style: none; }

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

/* ---------- Tipografi Yardımcıları ---------- */
h1, h2, h3, h4 { font-weight: var(--fw-light); line-height: 1.1; letter-spacing: -0.02em; color: var(--color-ink); }

h1 { font-size: clamp(2.75rem, 6vw, var(--fs-5xl)); font-weight: var(--fw-light); }
h2 { font-size: clamp(2rem, 4vw, var(--fs-4xl)); }
h3 { font-size: clamp(1.5rem, 2.5vw, var(--fs-2xl)); }
h4 { font-size: var(--fs-xl); font-weight: var(--fw-medium); }

p { color: var(--color-muted); }

.lead { font-size: var(--fs-lg); color: var(--color-ink-soft); font-weight: var(--fw-light); line-height: 1.7; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-gold);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--color-gold);
}

.text-gold { color: var(--color-gold); }
.text-cream { color: var(--color-cream); }

/* ---------- Layout Yardımcıları ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container-wide { max-width: 1440px; }
.container-narrow { max-width: 860px; }

.section { padding-block: var(--space-10); }
.section-sm { padding-block: var(--space-9); }

.section-dark { background: var(--color-ink); color: var(--color-cream); }
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--color-white); }
.section-dark p { color: rgba(245, 241, 234, 0.7); }

.section-cream { background: var(--color-cream); }

.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Bölüm başlığı düzeni */
.section-head { max-width: 720px; margin-bottom: var(--space-9); }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head .eyebrow { margin-bottom: var(--space-4); }
.section-head p { margin-top: var(--space-4); font-size: var(--fs-lg); }

/* ---------- Butonlar ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.95rem 1.75rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary { background: var(--color-ink); color: var(--color-white); }
.btn-primary:hover { background: var(--color-gold); transform: translateY(-2px); }

.btn-gold { background: var(--color-gold); color: var(--color-ink); }
.btn-gold:hover { background: var(--color-gold-soft); transform: translateY(-2px); }

.btn-outline { background: transparent; border-color: var(--color-line-strong); color: var(--color-ink); }
.btn-outline:hover { border-color: var(--color-ink); background: var(--color-ink); color: var(--color-white); }

.btn-ghost-light { background: transparent; border-color: rgba(245, 241, 234, 0.3); color: var(--color-white); }
.btn-ghost-light:hover { background: var(--color-cream); color: var(--color-ink); border-color: var(--color-cream); }

.btn-sm { padding: 0.6rem 1.25rem; font-size: var(--fs-xs); }

.btn-arrow svg { transition: transform var(--transition); }
.btn:hover .btn-arrow svg { transform: translateX(4px); }

/* Link (alt çizgili) */
.link-underline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  position: relative;
}
.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.link-underline:hover::after { transform-origin: left; transform: scaleX(1); }
.link-underline svg { transition: transform var(--transition); }
.link-underline:hover svg { transform: translateX(4px); }
.link-gold { color: var(--color-gold); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(250, 250, 250, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(250, 250, 250, 0.95);
  border-bottom-color: var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0;
  color: var(--color-ink);
  line-height: 0;
}
.logo-img { height: 38px; width: auto; display: block; border-radius: 3px; transition: var(--transition); }
.logo:hover .logo-img { transform: translateY(-1px); }
/* Eski metin tabanlı logo (geri uyumluluk) */
.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--color-brand);
  color: var(--color-white);
  display: grid;
  place-items: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}

/* Ana navigasyon */
.main-nav ul { display: flex; align-items: center; gap: var(--space-6); }
.main-nav a {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-ink-soft);
  position: relative;
  padding-block: var(--space-2);
  transition: color var(--transition);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.main-nav a:hover, .main-nav a.active { color: var(--color-ink); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }

.header-cta { display: flex; align-items: center; gap: var(--space-4); }

/* Hamburger */
.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.menu-toggle span {
  width: 22px;
  height: 1.5px;
  background: var(--color-ink);
  transition: var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobil menü paneli */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--color-bg);
  z-index: 999;
  padding: var(--space-9) var(--container-pad);
  transform: translateX(100%);
  transition: transform var(--transition);
  overflow-y: auto;
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav ul { display: flex; flex-direction: column; gap: var(--space-4); }
.mobile-nav a {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-light);
  color: var(--color-ink);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-line);
}
.mobile-nav .btn { margin-top: var(--space-6); width: 100%; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-ink); color: rgba(245, 241, 234, 0.6); padding-top: var(--space-10); }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-8);
  padding-bottom: var(--space-9);
  border-bottom: 1px solid rgba(245, 241, 234, 0.12);
}
.footer-brand .logo { color: var(--color-white); margin-bottom: var(--space-4); }
.footer-brand p { color: rgba(245, 241, 234, 0.55); max-width: 320px; margin-bottom: var(--space-5); }
.footer-col h5 {
  color: var(--color-white);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-5);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { font-size: var(--fs-sm); color: rgba(245, 241, 234, 0.6); transition: color var(--transition); }
.footer-col a:hover { color: var(--color-gold); }

.footer-contact li { display: flex; gap: var(--space-3); margin-bottom: var(--space-3); font-size: var(--fs-sm); color: rgba(245, 241, 234, 0.6); }
.footer-contact svg { flex-shrink: 0; color: var(--color-gold); margin-top: 3px; }

.social-links { display: flex; gap: var(--space-3); margin-top: var(--space-5); }
.social-links a {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(245, 241, 234, 0.2);
  display: grid; place-items: center;
  color: rgba(245, 241, 234, 0.7);
  transition: var(--transition);
}
.social-links a:hover { background: var(--color-gold); border-color: var(--color-gold); color: var(--color-ink); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-6);
  font-size: var(--fs-xs);
  color: rgba(245, 241, 234, 0.45);
}
.footer-bottom a:hover { color: var(--color-gold); }

/* ---------- Page Hero (iç sayfalar) ---------- */
.page-hero {
  padding-top: calc(var(--header-h) + var(--space-9));
  padding-bottom: var(--space-9);
  border-bottom: 1px solid var(--color-line);
}
.page-hero h1 { margin-top: var(--space-4); max-width: 800px; }
.page-hero p { margin-top: var(--space-5); font-size: var(--fs-lg); max-width: 620px; }

.breadcrumb { display: flex; gap: var(--space-2); font-size: var(--fs-xs); color: var(--color-faint); text-transform: uppercase; letter-spacing: 0.1em; }
.breadcrumb a:hover { color: var(--color-gold); }
.breadcrumb span { color: var(--color-muted); }