/* =========================================================
   ÜFES Alkolmetre - Kurumsal Site Stil Dosyası
   ========================================================= */

:root {
  --color-electric-blue: #0788F9;
  --color-electric-blue-dark: #0566BF;
  --color-black: #080808;
  --color-white: #FFFFFF;
  --color-dark-gray: #17191D;
  --color-light-gray: #F3F5F7;
  --color-border: #E3E6EA;
  --color-text-muted: #5B6168;

  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;

  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --transition-fast: 0.18s ease;
  --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);

  --shadow-sm: 0 2px 10px rgba(8, 8, 8, 0.06);
  --shadow-md: 0 12px 32px rgba(8, 8, 8, 0.10);
  --shadow-glow: 0 10px 30px rgba(7, 136, 249, 0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--color-black);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 16px; color: var(--color-text-muted); }

.section { padding: 96px 0; }
.section-light { background: var(--color-light-gray); }
.section-dark { background: var(--color-black); color: var(--color-white); }
.section-dark p { color: rgba(255,255,255,0.7); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-electric-blue);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.eyebrow::before {
  content: '';
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-electric-blue);
}

.text-center { text-align: center; }
.section-head { max-width: 680px; margin: 0 auto 56px; text-align: center; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--color-electric-blue);
  color: var(--color-white);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { background: var(--color-electric-blue-dark); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.3);
  color: var(--color-white);
}
.btn-outline:hover { border-color: var(--color-white); transform: translateY(-2px); }
.btn-dark {
  background: var(--color-black);
  color: var(--color-white);
}
.btn-dark:hover { background: var(--color-electric-blue); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(8, 8, 8, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--container-max);
  margin: 0 auto;
}
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-link img { height: 34px; width: auto; display: block; }

.main-nav { display: flex; align-items: center; gap: 36px; }
.main-nav ul { display: flex; list-style: none; margin: 0; padding: 0; gap: 28px; }
.main-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: rgba(255,255,255,0.85);
  position: relative;
  padding: 6px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--color-electric-blue);
  transition: width var(--transition-fast);
}
.main-nav a:hover { color: var(--color-white); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.main-nav a.active { color: var(--color-electric-blue); }

.header-actions { display: flex; align-items: center; gap: 16px; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  width: 26px; height: 2px;
  background: var(--color-white);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  position: fixed;
  inset: 0;
  top: 65px;
  background: var(--color-black);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  z-index: 999;
  overflow-y: auto;
}
.mobile-nav.is-open { transform: translateX(0); }
.mobile-nav ul { list-style: none; padding: 32px 24px; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.mobile-nav a { display: block; padding: 16px 0; font-size: 1.2rem; font-weight: 700; color: var(--color-white); border-bottom: 1px solid rgba(255,255,255,0.1); }

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--color-black) 0%, #0b1420 60%, var(--color-black) 100%);
  color: var(--color-white);
  padding: 120px 0 100px;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -20%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(7,136,249,0.35), transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-subtitle { font-size: 1.15rem; color: rgba(255,255,255,0.75); max-width: 480px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 32px; }
.hero-visual {
  background: linear-gradient(145deg, rgba(7,136,249,0.18), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  aspect-ratio: 4/5;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.hero-visual img { border-radius: var(--radius-md); }
.hero-visual .placeholder-note {
  color: rgba(255,255,255,0.4);
  font-size: 0.85rem;
  text-align: center;
}

/* Değer / özellik kartları */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: rgba(7,136,249,0.1);
  color: var(--color-electric-blue);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

/* Ürün kartları */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.product-card .product-image {
  aspect-ratio: 1/1;
  background: var(--color-light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.product-card .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-base); }
.product-card:hover .product-image img { transform: scale(1.06); }
.product-card .product-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.product-card .product-body h3 { margin-bottom: 8px; }
.product-card .product-body p { flex: 1; }
.badge-featured {
  display: inline-block;
  background: var(--color-electric-blue);
  color: var(--color-white);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  width: fit-content;
}

/* Ürün detay */
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.product-gallery-main { border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--color-border); aspect-ratio: 1/1; background: var(--color-light-gray); }
.product-gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.product-thumbs { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.product-thumbs img { width: 76px; height: 76px; object-fit: cover; border-radius: 10px; border: 2px solid var(--color-border); cursor: pointer; }
.product-thumbs img.active, .product-thumbs img:hover { border-color: var(--color-electric-blue); }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
.spec-table tr { border-bottom: 1px solid var(--color-border); }
.spec-table td { padding: 12px 0; }
.spec-table td:first-child { color: var(--color-text-muted); font-weight: 600; width: 40%; }

/* FAQ Accordion */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 22px 0;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  color: var(--color-black);
}
.faq-question .icon { transition: transform var(--transition-fast); color: var(--color-electric-blue); font-size: 1.3rem; }
.faq-item.is-open .faq-question .icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}
.faq-answer-inner { padding-bottom: 22px; color: var(--color-text-muted); }

/* Forms */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.form-group.full { grid-column: 1 / -1; }
label { font-weight: 600; font-size: 0.9rem; }
input, textarea, select {
  font-family: var(--font-main);
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-electric-blue);
  box-shadow: 0 0 0 4px rgba(7,136,249,0.12);
}
textarea { resize: vertical; min-height: 140px; }

.alert { padding: 16px 20px; border-radius: var(--radius-sm); margin-bottom: 24px; font-weight: 600; }
.alert-success { background: #E6F7EA; color: #1C7C3F; }
.alert-error { background: #FDEAEA; color: #B3261E; }

/* Footer */
.site-footer { background: var(--color-black); color: rgba(255,255,255,0.7); padding: 72px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 48px; }
.footer-grid h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 18px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-grid a:hover { color: var(--color-electric-blue); }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo img { height: 32px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
}
.social-links { display: flex; gap: 12px; }
.social-links a {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.social-links a:hover { background: var(--color-electric-blue); border-color: var(--color-electric-blue); }

/* Scroll reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Breadcrumb */
.breadcrumb { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 24px; }
.breadcrumb a:hover { color: var(--color-electric-blue); }

/* Pagination */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 48px; }
.pagination a, .pagination span {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  font-weight: 600;
}
.pagination a:hover { border-color: var(--color-electric-blue); color: var(--color-electric-blue); }
.pagination .active { background: var(--color-electric-blue); color: var(--color-white); border-color: var(--color-electric-blue); }

/* 404 */
.error-page { text-align: center; padding: 140px 0; }
.error-page .code { font-size: 6rem; font-weight: 900; color: var(--color-electric-blue); margin: 0; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 20px; left: 20px; right: 20px;
  max-width: 560px;
  margin: 0 auto;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-md);
  z-index: 1200;
  transform: translateY(120%);
  transition: transform var(--transition-base);
}
.cookie-banner.is-visible { transform: translateY(0); }
.cookie-banner p { color: rgba(255,255,255,0.8); margin: 0; font-size: 0.88rem; }
.cookie-banner .btn { padding: 10px 20px; font-size: 0.85rem; white-space: nowrap; }

/* Responsive */
@media (max-width: 960px) {
  .main-nav ul { display: none; }
  .hamburger { display: flex; }
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .grid-3, .grid-2, .products-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero { padding: 96px 0 72px; }
  .cookie-banner { flex-direction: column; align-items: stretch; text-align: center; }
}