/* ========================================
   İleri Teknik Otomotiv - Genel CSS
   Tasarım Sistemi & Değişkenler
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Oswald:wght@400;500;600;700&display=swap');

/* === CSS DEĞİŞKENLERİ === */
:root {
  /* Renkler */
  --renk-birincil: #E63946;
  --renk-birincil-koyu: #C41E3A;
  --renk-birincil-acik: #FF5A66;
  --renk-koyu: #0D0D0D;
  --renk-antrasit: #1A1A2E;
  --renk-gri-koyu: #1E1E1E;
  --renk-gri-orta: #2D2D2D;
  --renk-gri-acik: #555555;
  --renk-gri-sinir: #333333;
  --renk-beyaz: #F5F5F5;
  --renk-beyaz-tam: #FFFFFF;
  --renk-altin: #C9A227;
  --renk-altin-acik: #E8BC30;
  --renk-yesil: #25D366;
  --renk-yesil-koyu: #1DA851;

  /* Tipografi */
  --font-ana: 'Inter', sans-serif;
  --font-baslik: 'Oswald', sans-serif;

  /* Font Boyutları */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-md: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;

  /* Boşluklar */
  --bosluk-xs: 0.25rem;
  --bosluk-sm: 0.5rem;
  --bosluk-md: 1rem;
  --bosluk-lg: 1.5rem;
  --bosluk-xl: 2rem;
  --bosluk-2xl: 3rem;
  --bosluk-3xl: 4rem;
  --bosluk-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-tam: 9999px;

  /* Gölgeler */
  --golge-sm: 0 2px 8px rgba(0,0,0,0.3);
  --golge-md: 0 4px 20px rgba(0,0,0,0.4);
  --golge-lg: 0 8px 40px rgba(0,0,0,0.5);
  --golge-kirmizi: 0 4px 20px rgba(230,57,70,0.4);
  --golge-altin: 0 4px 20px rgba(201,162,39,0.3);

  /* Geçişler */
  --gecis-hizli: all 0.2s ease;
  --gecis-normal: all 0.3s ease;
  --gecis-yavas: all 0.5s ease;

  /* Konteyner */
  --konteyner-max: 1280px;
  --konteyner-padding: 1.5rem;
}

/* === RESET & TEMEL === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-ana);
  background-color: var(--renk-koyu);
  color: var(--renk-beyaz);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--gecis-normal);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-ana);
}

input, textarea, select {
  font-family: var(--font-ana);
}

/* === KONTEYNER === */
.konteyner {
  max-width: var(--konteyner-max);
  margin: 0 auto;
  padding: 0 var(--konteyner-padding);
}

/* === GENEL BÖLÜM STİLİ === */
.bolum {
  padding: var(--bosluk-4xl) 0;
}

.bolum-baslik {
  text-align: center;
  margin-bottom: var(--bosluk-3xl);
}

.bolum-baslik .alt-baslik {
  display: inline-block;
  font-family: var(--font-ana);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--renk-birincil);
  margin-bottom: var(--bosluk-sm);
}

.bolum-baslik h2 {
  font-family: var(--font-baslik);
  font-size: var(--fs-4xl);
  font-weight: 700;
  color: var(--renk-beyaz);
  line-height: 1.2;
  margin-bottom: var(--bosluk-md);
}

.bolum-baslik p {
  font-size: var(--fs-lg);
  color: var(--renk-gri-acik);
  max-width: 600px;
  margin: 0 auto;
}

.bolum-ayirici {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--renk-birincil), var(--renk-altin));
  border-radius: var(--radius-tam);
  margin: var(--bosluk-md) auto 0;
}

/* === BUTONLAR === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: var(--gecis-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.1);
  transition: left 0.3s ease;
}

.btn:hover::before {
  left: 0;
}

.btn-birincil {
  background: linear-gradient(135deg, var(--renk-birincil), var(--renk-birincil-koyu));
  color: var(--renk-beyaz-tam);
  box-shadow: var(--golge-kirmizi);
}

.btn-birincil:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(230,57,70,0.5);
  color: var(--renk-beyaz-tam);
}

.btn-ikincil {
  background: transparent;
  color: var(--renk-beyaz);
  border: 2px solid rgba(255,255,255,0.5);
}

.btn-ikincil:hover {
  border-color: var(--renk-beyaz);
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: linear-gradient(135deg, var(--renk-yesil), var(--renk-yesil-koyu));
  color: var(--renk-beyaz-tam);
  box-shadow: 0 4px 15px rgba(37,211,102,0.4);
}

.btn-whatsapp:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(37,211,102,0.5);
  color: var(--renk-beyaz-tam);
}

.btn-lg {
  padding: 1.1rem 2.5rem;
  font-size: var(--fs-lg);
}

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

/* === BADGE === */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-tam);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.badge-kirmizi {
  background: var(--renk-birincil);
  color: var(--renk-beyaz-tam);
}

.badge-altin {
  background: var(--renk-altin);
  color: var(--renk-koyu);
}

/* === SAYFA BAŞLIĞI === */
.sayfa-hero {
  background: linear-gradient(135deg, var(--renk-antrasit) 0%, var(--renk-koyu) 100%);
  padding: 7rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.sayfa-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(230,57,70,0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(201,162,39,0.08) 0%, transparent 50%);
}

.sayfa-hero .konteyner {
  position: relative;
  z-index: 1;
}

.sayfa-hero h1 {
  font-family: var(--font-baslik);
  font-size: var(--fs-5xl);
  font-weight: 700;
  color: var(--renk-beyaz);
  margin-bottom: var(--bosluk-md);
}

.sayfa-hero h1 span {
  color: var(--renk-birincil);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  color: var(--renk-gri-acik);
}

.breadcrumb a:hover {
  color: var(--renk-birincil);
}

.breadcrumb .ayirici {
  color: var(--renk-birincil);
}

/* === GRID YARDIMCI === */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--bosluk-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--bosluk-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--bosluk-xl); }

/* === ANİMASYONLAR === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.animate-fadeInUp { animation: fadeInUp 0.6s ease forwards; }
.animate-fadeIn { animation: fadeIn 0.6s ease forwards; }

/* === SCROLL REVEAL === */
.gizli {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.gizli.gorunur {
  opacity: 1;
  transform: translateY(0);
}

/* === WHATSAPP FLOATING === */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  background: var(--renk-yesil);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  box-shadow: 0 4px 20px rgba(37,211,102,0.5);
  transition: var(--gecis-normal);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  background: var(--renk-yesil-koyu);
  transform: scale(1.1);
  animation: none;
}

.whatsapp-float svg {
  width: 32px;
  height: 32px;
  fill: white;
}

/* === YÜKLEME ÇUBUĞU === */
.yuklenme-cubugu {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--renk-birincil), var(--renk-altin));
  z-index: 99999;
  transition: width 0.3s ease;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --konteyner-padding: 1rem;
  }
  .bolum { padding: var(--bosluk-3xl) 0; }
  .bolum-baslik h2 { font-size: var(--fs-3xl); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .sayfa-hero { padding: 6rem 0 3rem; }
  .sayfa-hero h1 { font-size: var(--fs-4xl); }
  .whatsapp-float { bottom: 1.5rem; right: 1rem; width: 52px; height: 52px; }
}

@media (max-width: 480px) {
  .bolum-baslik h2 { font-size: var(--fs-2xl); }
  .btn { padding: 0.75rem 1.5rem; font-size: var(--fs-sm); }
  .btn-lg { padding: 0.875rem 1.75rem; font-size: var(--fs-md); }
}