/* ==========================================================================
   PBK Grup - Global Styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette based on Koç Holding / Corporate Premium */
  --color-primary: #0A192F; /* Deep Navy */
  --color-primary-light: #112240;
  --color-secondary: #C5A059; /* Elegant Gold */
  --color-secondary-hover: #D4B06A;
  --color-dark: #000000;
  --color-light: #F8F9FA;
  --color-white: #FFFFFF;
  --color-gray: #6B7280;
  --color-gray-light: #E5E7EB;
  
  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 8rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-Index */
  --z-navbar: 1000;
  --z-dropdown: 1010;
  --z-modal: 1020;
  --z-overlay: 999;
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-gray);
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--color-white);
  animation: fadeInPage 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
  opacity: 0;
}

@keyframes fadeInPage {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

body.page-leaving {
    animation: fadeOutPage 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

@keyframes fadeOutPage {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-15px); }
}

/* Premium Grain Texture */
body::after {
    content: "";
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.04;
    background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><filter id="noiseFilter"><feTurbulence type="fractalNoise" baseFrequency="0.85" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noiseFilter)"/></svg>');
}

/* Cursor Glow */
.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(197, 160, 89, 0.1) 0%, rgba(0,0,0,0) 70%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    z-index: 9998;
    transition: width 0.3s, height 0.3s;
    mix-blend-mode: screen;
}

ul {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

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

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 60px;
  height: 3px;
  background-color: var(--color-secondary);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 0;
  background-color: transparent;
  z-index: var(--z-navbar);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background-color: var(--color-white);
  padding: 1rem 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.nav-logo {
  height: 50px;
  width: auto;
  transition: filter var(--transition-fast);
}

/* When navbar is transparent over dark backgrounds, turn logo white */
.navbar:not(.scrolled) .nav-logo {
  filter: brightness(0) invert(1);
}

.navbar.scrolled .nav-logo {
  filter: none;
}

.logo span {
  color: var(--color-secondary);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-link {
  color: var(--color-white);
  font-weight: 500;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  padding: 0.5rem 0;
}

.navbar.scrolled .nav-link {
  color: var(--color-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-white);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

.navbar.scrolled .nav-toggle span {
  background-color: var(--color-primary);
}

/* Hero Section */
.hero {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(10, 25, 47, 0.8), rgba(10, 25, 47, 0.4));
  z-index: -1;
}

.hero-content {
  text-align: left;
  max-width: 800px;
  color: var(--color-white);
  padding: 0 var(--spacing-md);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 1s forwards 0.5s;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 4.5rem;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 300;
  margin-bottom: 2.5rem;
  color: var(--color-gray-light);
}

.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: 30px;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

/* Ripple Effect */
.btn .ripple {
    position: absolute;
    background: rgba(255, 255, 255, 0.4);
    transform: translate(-50%, -50%);
    pointer-events: none;
    border-radius: 50%;
    animation: rippleAnim 0.8s linear forwards;
}

@keyframes rippleAnim {
    0% { width: 0px; height: 0px; opacity: 1; }
    100% { width: 500px; height: 500px; opacity: 0; }
}

.btn-primary {
  background-color: var(--color-secondary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-secondary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(197, 160, 89, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
  margin-left: 1rem;
}

.btn-outline:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
}

/* Keyframes */
@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sectors Grid */
.sectors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.sector-card {
  position: relative;
  height: 300px;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.sector-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.sector-card:hover img {
  transform: scale(1.08);
}

.sector-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(10, 25, 47, 0.95), rgba(10, 25, 47, 0.1));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  color: var(--color-white);
  transition: background 0.5s ease;
}

.sector-card:hover .sector-overlay {
  background: linear-gradient(to top, rgba(10, 25, 47, 0.98), rgba(10, 25, 47, 0.4));
}

.sector-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.sector-desc {
  color: var(--color-gray-light);
  font-size: 1rem;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.sector-card:hover .sector-title {
  transform: translateY(0);
}

.sector-card:hover .sector-desc {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.1s;
}

/* Stats Section */
.stats-section {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 6rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 2rem;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 4rem;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: 1rem;
}

.stat-label {
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-gray-light);
}

/* About Preview */
.about-preview {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.about-text {
  flex: 1;
}

.about-text p {
  font-size: 1.2rem;
  color: var(--color-gray);
  margin-bottom: 2rem;
}

.about-image {
  flex: 1;
  position: relative;
}

.about-image img {
  border-radius: 4px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.about-image::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-secondary);
  z-index: -1;
  border-radius: 4px;
}

/* Footer */
.footer {
  background-color: var(--color-primary-light);
  color: var(--color-white);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-white);
  text-decoration: none;
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-nav-logo {
  height: 60px;
  width: auto;
  filter: brightness(0) invert(1); /* Keep footer logo white on dark bg */
}

.footer-desc {
  color: var(--color-gray-light);
  margin-bottom: 2rem;
  max-width: 300px;
}

.footer-title {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--color-white);
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-secondary);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: var(--color-gray-light);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-secondary);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-gray);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3.5rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about-preview {
    flex-direction: column;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--color-primary);
    flex-direction: column;
    padding: 6rem 2rem;
    transition: right var(--transition-normal);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2.5rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  
  .btn-outline {
    margin-left: 0;
    margin-top: 1rem;
    display: block;
    width: max-content;
  }
}

.company-tag {
  background: var(--color-light);
  padding: 0.5rem 1rem;
  border-radius: 2px;
  font-weight: 500;
  font-size: 0.9rem;
  border-left: 3px solid var(--color-secondary);
  display: inline-block;
  transition: all var(--transition-fast);
  color: var(--color-primary);
}

a.company-tag:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* News Section */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2.5rem;
}

.news-card {
  display: block;
  background-color: var(--color-white);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid var(--color-gray-light);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.news-image {
  position: relative;
  height: 250px;
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-card:hover .news-image img {
  transform: scale(1.05);
}

.news-date {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 2px;
}

.news-content {
  padding: 2rem;
}

.news-category {
  color: var(--color-gray);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  display: block;
}

.news-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.news-card:hover .news-title {
  color: var(--color-secondary);
}

.news-excerpt {
  color: var(--color-gray);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.news-readmore {
  color: var(--color-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition-fast);
}

.news-card:hover .news-readmore {
  color: var(--color-secondary);
}

.news-readmore i {
  transition: transform var(--transition-fast);
}

.news-card:hover .news-readmore i {
  transform: translateX(5px);
}

@media (max-width: 768px) {
  .news-grid {
    grid-template-columns: 1fr;
  }
}

/* Hide Google Translate UI Elements */
.skiptranslate {
    display: none !important;
}
body {
    top: 0 !important;
}
.goog-te-banner-frame.skiptranslate {
    display: none !important;
}

/* Global Mobile Fixes */
@media (max-width: 768px) {
    /* Prevent horizontal scrolling globally */
    html, body {
        overflow-x: hidden;
        width: 100%;
    }

    /* Force grids to single column on small screens to prevent minmax() overflow */
    .sectors-grid, 
    .news-grid,
    .footer-grid,
    .contact-layout .container,
    .tab-pane > div[style*="grid"] {
        grid-template-columns: 1fr !important;
        display: grid !important;
    }

    /* Keep stats as 2 columns but reduce gap so it fits */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1rem !important;
    }

    /* Adjust typography for mobile to prevent word breaking issues */
    .hero-title {
        font-size: 2.2rem !important;
        line-height: 1.2;
    }
    
    .section-title {
        font-size: 2rem !important;
    }

    /* Ensure container padding doesn't force overflow */
    .container {
        padding: 0 1.5rem !important;
    }
    
    /* Fix inline flexboxes */
    .contact-layout .container > div {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    /* For very small devices like iPhone SE */
    .stats-grid {
        grid-template-columns: 1fr !important;
    }
}