/* ==========================================
   EESTEC LC Izmir - Pure HTML/CSS Design System
   ========================================== */

/* Theme Colors - Global CSS Variables */
:root {
  --color-primary: #e52a30;
  --color-dark: #141414;
  --color-light: #ffffff;
  --color-primary-dark: #c01f24;
  --color-primary-light: #ff4449;
  --color-gray: #2a2a2a;
  --color-gray-light: #f5f5f5;
  --color-overlay: rgba(20, 20, 20, 0.85);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 3rem;
  --font-size-4xl: 4rem;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 20px rgba(229, 42, 48, 0.3);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --dot-bg: rgba(255, 255, 255, 0.3);
  --dot-hover-bg: rgba(255, 255, 255, 0.5);
}

[data-theme='light'] {
  --color-dark: #ffffff;
  --color-light: #141414;
  --color-gray: #f0f0f0;
  --color-gray-light: #2a2a2a;
  --color-overlay: rgba(255, 255, 255, 0.95);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
  --glass-bg: rgba(0, 0, 0, 0.05);
  --glass-border: rgba(0, 0, 0, 0.1);
  --dot-bg: rgba(0, 0, 0, 0.3);
  --dot-hover-bg: rgba(0, 0, 0, 0.5);
}

/* Modern CSS Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: var(--font-size-base); overflow-x: hidden; }
body {
  margin: 0;
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-dark);
  color: var(--color-light);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-sm); }
h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
p { margin-bottom: var(--spacing-sm); }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-light); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-md); }
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--color-dark); }
::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-primary-light); }

/* Splash Screen */
.splash-screen {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-color: var(--color-dark);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease-in-out;
}
.splash-screen.fade-out { opacity: 0; pointer-events: none; }
.splash-screen.hidden { display: none; }
.splash-content { text-align: center; animation: zoomIn 1s ease-out; }
.splash-logo { width: 150px; height: auto; margin-bottom: 20px; filter: drop-shadow(0 0 10px rgba(229, 42, 48, 0.3)); }
.splash-title { font-size: 2.5rem; font-weight: 700; margin-bottom: 30px; letter-spacing: 2px; }
.text-white { color: var(--color-light); }
.text-red { color: var(--color-primary); }
.loading-bar { width: 200px; height: 4px; background-color: var(--glass-border); border-radius: 2px; margin: 0 auto; overflow: hidden; }
.loading-progress { width: 0%; height: 100%; background-color: #e52a30; animation: progress 2s ease-in-out forwards; }

@keyframes zoomIn { from { transform: scale(0.8); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes progress { 0% { width: 0%; } 50% { width: 70%; } 100% { width: 100%; } }

/* Navbar */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background-color: transparent;
  transition: all var(--transition-base);
  padding: var(--spacing-sm) 0;
}
.navbar.scrolled {
  background-color: var(--color-overlay);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xs) 0;
}
.navbar-container { display: flex; justify-content: space-between; align-items: center; }
.navbar-logo { display: flex; align-items: center; gap: 1rem; font-size: var(--font-size-xl); font-weight: 800; cursor: pointer; transition: transform var(--transition-fast); flex-shrink: 0; }
.navbar-logo:hover { transform: scale(1.05); }
.logo-image { height: 50px; width: auto; object-fit: contain; transition: transform var(--transition-base); }
.navbar.scrolled .logo-image { height: 40px; }
.logo-text-container { display: flex; align-items: baseline; gap: 0.5rem; white-space: nowrap; }
.logo-text { color: var(--color-light); }
.logo-accent { color: var(--color-primary); font-weight: 900; }
.navbar-menu { display: flex; list-style: none; gap: var(--spacing-sm); align-items: center; }
.navbar-menu li button {
  background: none; border: none; color: var(--color-light);
  font-size: 1rem; font-weight: 500; cursor: pointer;
  padding: var(--spacing-xs); position: relative;
  transition: color var(--transition-fast);
  font-family: var(--font-family); white-space: nowrap;
}
.navbar-menu li button::after {
  content: ''; position: absolute; bottom: 0; left: 50%;
  width: 0; height: 2px; background-color: var(--color-primary);
  transition: all var(--transition-base); transform: translateX(-50%);
}
.navbar-menu li button:hover { color: var(--color-primary); }
.navbar-menu li button:hover::after { width: 100%; }
.language-switcher {
  background: var(--color-primary) !important;
  color: var(--color-light) !important;
  border-radius: 8px;
  padding: 0.5rem 1rem !important;
  font-weight: 700 !important;
  transition: all var(--transition-fast) !important;
}
.language-switcher::after { display: none !important; }
.language-switcher:hover {
  background: var(--color-light) !important;
  color: var(--color-primary) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(229, 42, 48, 0.3);
}
.theme-switcher {
  background: transparent !important; color: var(--color-light) !important;
  border: none !important; border-radius: 50%; padding: 0 !important;
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast) !important; cursor: pointer;
}
.theme-switcher:hover { background: rgba(255, 255, 255, 0.1) !important; transform: rotate(15deg); }
[data-theme='light'] .theme-switcher:hover { background: rgba(0, 0, 0, 0.05) !important; }
.theme-switcher::after { display: none !important; }
.theme-icon { width: 20px; height: 20px; transition: transform var(--transition-base); }
.mobile-menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer;
  padding: var(--spacing-xs); z-index: 1001;
}
.mobile-menu-toggle span { width: 25px; height: 3px; background-color: var(--color-light); transition: all var(--transition-base); border-radius: 2px; }
.mobile-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(8px, 8px); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

@media (max-width: 900px) {
  .mobile-menu-toggle { display: flex; }
  .navbar-menu {
    position: fixed; top: 0; right: -100%; height: 100vh; width: 70%; max-width: 300px;
    background-color: var(--color-dark); flex-direction: column; justify-content: center;
    align-items: center; gap: var(--spacing-lg); transition: right var(--transition-base); box-shadow: var(--shadow-lg);
  }
  .navbar-menu.active { right: 0; }
  .navbar-menu li button { font-size: var(--font-size-xl); }
  .logo-image { height: 40px; }
  .logo-text-container { font-size: var(--font-size-base); }
}
@media (max-width: 480px) {
  .navbar-logo { gap: 0.5rem; }
  .logo-image { height: 35px; }
}

/* Hero Section */
.hero {
  position: relative; min-height: 100vh; display: flex;
  align-items: center; justify-content: center; text-align: center;
  width: 100%; padding-top: 100px; overflow: hidden;
}
.hero-background { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; }
.hero-gradient {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at center, rgba(229, 42, 48, 0.15) 0%, transparent 70%);
}
.hero-pattern {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
}
.hero-content { position: relative; z-index: 2; width: 100%; }
.slider-container { position: relative; width: 100%; min-height: 400px; margin-bottom: var(--spacing-md); }
.slide { display: none; }
.slide.active { display: block; animation: fadeInUp 0.8s ease-out; }
.hero-text { margin-bottom: var(--spacing-lg); }
.slider-dots { display: flex; justify-content: center; gap: var(--spacing-sm); margin-bottom: var(--spacing-lg); }
.dot {
  width: 12px; height: 12px; border-radius: 50%;
  background-color: var(--dot-bg); border: 2px solid transparent;
  cursor: pointer; transition: all var(--transition-base); padding: 0;
}
.dot:hover { background-color: var(--dot-hover-bg); transform: scale(1.2); }
.dot.active { background-color: var(--color-primary); border-color: var(--color-primary); box-shadow: var(--shadow-glow); transform: scale(1.3); }
.hero-title { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: var(--spacing-md); }
.title-line {
  display: block; font-size: clamp(3.5rem, 10vw, 7rem); font-weight: 900;
  letter-spacing: -0.04em; line-height: 0.9; animation: fadeInUp 0.8s ease-out backwards; text-transform: uppercase;
}
.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }
.title-line:nth-child(3) { animation-delay: 0.3s; }
.title-line.accent {
  background: linear-gradient(to right, #e52a30, #ff4d53, #e52a30);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% auto; animation: shine 3s linear infinite, fadeInUp 0.8s ease-out 0.2s backwards;
}
@keyframes shine { to { background-position: 200% center; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero-subtitle { font-size: var(--font-size-xl); font-weight: 600; color: var(--color-gray-light); margin-bottom: var(--spacing-sm); animation: fadeInUp 0.8s ease-out 0.4s backwards; }
.hero-description { font-size: var(--font-size-lg); color: var(--color-gray-light); max-width: 700px; margin: 0 auto var(--spacing-md); line-height: 1.8; animation: fadeInUp 0.8s ease-out 0.5s backwards; }
.hero-buttons { display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; animation: fadeInUp 4s ease-out 0.6s backwards; }
.btn {
  padding: 1rem 2.5rem; font-size: var(--font-size-lg); font-weight: 600;
  border: none; border-radius: 50px; cursor: pointer;
  transition: all var(--transition-base); font-family: var(--font-family);
  position: relative; overflow: hidden;
}
.btn::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 0; height: 0; border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}
.btn:hover::before { width: 300px; height: 300px; }
.btn-primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: var(--color-light); box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 30px rgba(229, 42, 48, 0.5); }
.btn-outline { background: transparent; color: var(--color-light); border: 2px solid var(--color-primary); }
.btn-outline:hover { background-color: var(--color-primary); transform: translateY(-3px); }
.hero-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--spacing-md); max-width: 800px; margin: 0 auto; }
.stat-card {
  background: var(--glass-bg); backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border); border-radius: 20px;
  padding: var(--spacing-md); transition: all var(--transition-base);
  animation: fadeInUp 0.8s ease-out backwards;
}
.stat-card:nth-child(1) { animation-delay: 0.7s; }
.stat-card:nth-child(2) { animation-delay: 0.8s; }
.stat-card:nth-child(3) { animation-delay: 0.9s; }
.stat-card:hover { transform: translateY(-10px); background: rgba(229, 42, 48, 0.1); border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.stat-number { font-size: var(--font-size-3xl); font-weight: 800; color: var(--color-light); margin-bottom: var(--spacing-xs); display: block; }
.stat-label { color: var(--color-gray-light); font-size: var(--font-size-lg); font-weight: 500; }
.scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); width: 30px; height: 50px; border: 2px solid var(--color-gray-light); border-radius: 20px; opacity: 0.7; animation: fadeInUp 2s ease-out 1s backwards; }
.wheel { width: 4px; height: 10px; background-color: var(--color-primary); border-radius: 2px; position: absolute; top: 10px; left: 50%; transform: translateX(-50%); animation: scroll 1.5s infinite; }
@keyframes scroll { 0% { opacity: 1; transform: translateX(-50%) translateY(0); } 100% { opacity: 0; transform: translateX(-50%) translateY(15px); } }

@media (max-width: 768px) {
  .hero { padding-top: 70px; min-height: 100vh; height: auto; padding-bottom: 20px; }
  .slider-container { min-height: 400px; margin-bottom: var(--spacing-xs); }
  .title-line { font-size: 2rem; line-height: 1.1; }
  .hero-subtitle { font-size: 1rem; margin-bottom: 0.5rem; }
  .hero-description { font-size: 0.9rem; line-height: 1.4; padding: 0 var(--spacing-sm); margin-bottom: 1rem; }
  .hero-buttons { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 0.5rem; padding: 0 var(--spacing-sm); margin-bottom: 1rem; }
  .btn { width: auto; min-width: 140px; padding: 0.7rem 1.2rem; font-size: 0.9rem; }
  .hero-stats { gap: 0.5rem; margin-top: 0.5rem; padding: 0 var(--spacing-sm); }
  .stat-card { padding: 0.5rem; }
  .stat-number { font-size: 1.5rem; margin-bottom: 0; }
  .stat-label { font-size: 0.8rem; }
  .scroll-indicator { display: none; }
}
@media (max-width: 480px) {
  .slider-container { min-height: 420px; }
  .title-line { font-size: 1.75rem; }
  .hero-buttons { flex-direction: column; width: 100%; max-width: 250px; margin: 0 auto 1rem; }
  .btn { width: 100%; }
}

/* Photo Gallery */
.photo-gallery { padding: 80px 0; background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-gray) 50%, var(--color-dark) 100%); position: relative; overflow: hidden; }
.photo-gallery::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: radial-gradient(circle at 20% 50%, rgba(229, 42, 48, 0.05) 0%, transparent 50%), radial-gradient(circle at 80% 50%, rgba(229, 42, 48, 0.05) 0%, transparent 50%); pointer-events: none; }
.photo-gallery .section-header { text-align: center; margin-bottom: 60px; position: relative; z-index: 1; }
.photo-gallery .section-title { font-size: 2.5rem; font-weight: 700; color: var(--color-light); margin-bottom: 15px; }
.photo-gallery .title-underline { width: 80px; height: 4px; background: linear-gradient(90deg, transparent, #e52a30, transparent); margin: 0 auto 20px; border-radius: 2px; }
.photo-gallery .section-subtitle { font-size: 1.1rem; color: var(--color-gray-light); max-width: 600px; margin: 0 auto; }
.gallery-slider { position: relative; display: flex; align-items: center; justify-content: center; gap: 20px; margin-bottom: 40px; min-height: 500px; }
.gallery-track { display: flex; align-items: center; justify-content: center; position: relative; width: 100%; max-width: 1200px; height: 450px; perspective: 1500px; }
.gallery-item { position: absolute; width: 600px; height: 400px; transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1); cursor: pointer; opacity: 0; pointer-events: none; }
.gallery-item.active { z-index: 3; transform: translateX(0) scale(1); opacity: 1; pointer-events: all; }
.gallery-item.left { z-index: 2; transform: translateX(-450px) scale(0.85) rotateY(15deg); opacity: 0.6; pointer-events: all; }
.gallery-item.right { z-index: 2; transform: translateX(450px) scale(0.85) rotateY(-15deg); opacity: 0.6; pointer-events: all; }
.gallery-image-wrapper { position: relative; width: 100%; height: 100%; border-radius: 20px; overflow: hidden; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.1); transition: all 0.3s ease; }
.gallery-item.active .gallery-image-wrapper { box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(229, 42, 48, 0.3), 0 0 40px rgba(229, 42, 48, 0.2); }
.gallery-image-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.gallery-item.active .gallery-image-wrapper img { transform: scale(1.05); }
.gallery-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 30px; background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.7) 70%, transparent 100%); transform: translateY(100%); transition: transform 0.4s ease; }
.gallery-item.active .gallery-overlay { transform: translateY(0); }
.gallery-overlay h3 { font-size: 1.5rem; font-weight: 700; color: #ffffff; margin-bottom: 8px; }
.gallery-overlay p { font-size: 1rem; color: rgba(255, 255, 255, 0.8); margin: 0; }
.slider-btn { width: 50px; height: 50px; border-radius: 50%; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); color: #ffffff; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: all 0.3s ease; backdrop-filter: blur(10px); z-index: 10; }
.slider-btn:hover { background: #e52a30; border-color: #e52a30; transform: scale(1.1); box-shadow: 0 5px 20px rgba(229, 42, 48, 0.4); }
.slider-btn svg { width: 24px; height: 24px; }
.gallery-indicators { display: flex; gap: 12px; justify-content: center; align-items: center; }
.indicator { width: 12px; height: 12px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); border: none; cursor: pointer; transition: all 0.3s ease; position: relative; }
.indicator::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 0; height: 0; border-radius: 50%; background: #e52a30; transition: all 0.3s ease; }
.indicator.active::before { width: 100%; height: 100%; }
.indicator:hover:not(.active) { background: rgba(255, 255, 255, 0.4); transform: scale(1.2); }
.click-hint { display: block; margin-top: 10px; font-size: 0.8rem; color: #e52a30; font-weight: 600; opacity: 0; transform: translateY(10px); transition: all 0.3s ease 0.1s; }
.gallery-item:hover .click-hint { opacity: 1; transform: translateY(0); }

/* Lightbox */
.lightbox { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.95); z-index: 2000; display: none; justify-content: center; align-items: center; animation: fadeIn 0.3s ease-out; }
.lightbox.active { display: flex; }
.lightbox-content { position: relative; max-width: 90%; max-height: 90vh; display: flex; flex-direction: column; align-items: center; }
.lightbox-content img { max-width: 100%; max-height: 80vh; object-fit: contain; border-radius: 8px; box-shadow: 0 0 50px rgba(0, 0, 0, 0.5); animation: zoomIn 0.3s ease-out; }
.lightbox-caption { margin-top: 20px; text-align: center; color: #fff; animation: slideUp 0.4s ease-out; }
.lightbox-caption h3 { font-size: 1.5rem; margin-bottom: 8px; color: #e52a30; }
.lightbox-caption p { font-size: 1.1rem; color: rgba(255, 255, 255, 0.8); }
.lightbox-close { position: absolute; top: 20px; right: 30px; background: none; border: none; color: #fff; font-size: 3rem; cursor: pointer; z-index: 2001; transition: color 0.3s ease; }
.lightbox-close:hover { color: #e52a30; }
.lightbox-nav { position: absolute; top: 50%; transform: translateY(-50%); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); color: #fff; width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: all 0.3s ease; z-index: 2002; }
.lightbox-nav:hover { background: #e52a30; border-color: #e52a30; transform: translateY(-50%) scale(1.1); box-shadow: 0 0 20px rgba(229, 42, 48, 0.4); }
.lightbox-nav.prev { left: 30px; }
.lightbox-nav.next { right: 30px; }
.lightbox-nav svg { width: 30px; height: 30px; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

@media (max-width: 1200px) {
  .gallery-item { width: 500px; height: 350px; }
  .gallery-item.left { transform: translateX(-350px) scale(0.8) rotateY(15deg); }
  .gallery-item.right { transform: translateX(350px) scale(0.8) rotateY(-15deg); }
}
@media (max-width: 968px) {
  .photo-gallery { padding: 60px 0; }
  .photo-gallery .section-title { font-size: 2rem; }
  .gallery-track { height: 350px; }
  .gallery-item { width: 400px; height: 280px; }
  .gallery-item.left { transform: translateX(-250px) scale(0.75) rotateY(15deg); }
  .gallery-item.right { transform: translateX(250px) scale(0.75) rotateY(-15deg); }
  .slider-btn { width: 45px; height: 45px; }
  .slider-btn svg { width: 20px; height: 20px; }
}
@media (max-width: 768px) {
  .gallery-slider { min-height: 400px; }
  .gallery-track { height: 300px; }
  .gallery-item { width: 320px; height: 240px; }
  .gallery-item.left, .gallery-item.right { opacity: 0; pointer-events: none; }
  .gallery-overlay h3 { font-size: 1.2rem; }
  .gallery-overlay p { font-size: 0.9rem; }
  .slider-btn { width: 40px; height: 40px; }
  .slider-btn svg { width: 18px; height: 18px; }
  .lightbox-nav { width: 40px; height: 40px; }
  .lightbox-nav.prev { left: 10px; }
  .lightbox-nav.next { right: 10px; }
  .lightbox-nav svg { width: 20px; height: 20px; }
}
@media (max-width: 480px) {
  .photo-gallery { padding: 40px 0; }
  .photo-gallery .section-title { font-size: 1.75rem; }
  .gallery-slider { min-height: 350px; }
  .gallery-track { height: 250px; }
  .gallery-item { width: 280px; height: 200px; }
  .gallery-overlay { padding: 20px; }
  .gallery-overlay h3 { font-size: 1.1rem; }
  .gallery-overlay p { font-size: 0.85rem; }
}

/* About Section */
.about { padding: var(--spacing-xl) 0; background: linear-gradient(180deg, var(--color-dark) 0%, var(--color-gray) 50%, var(--color-dark) 100%); position: relative; }
.section-header { text-align: center; margin-bottom: var(--spacing-lg); }
.section-title { font-size: var(--font-size-3xl); font-weight: 900; color: var(--color-light); margin-bottom: var(--spacing-sm); }
.title-underline { width: 100px; height: 4px; background: linear-gradient(90deg, transparent, var(--color-primary), transparent); margin: 0 auto; border-radius: 2px; }
.about-content { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); align-items: start; }
.about-text h3 { color: var(--color-primary); margin-top: var(--spacing-md); margin-bottom: var(--spacing-sm); }
.about-text h3:first-child { margin-top: 0; }
.about-text p { color: var(--color-gray-light); line-height: 1.8; margin-bottom: var(--spacing-sm); }
.mt-lg { margin-top: var(--spacing-lg) !important; }
.about-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
.feature-card { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 20px; padding: var(--spacing-md); text-align: center; transition: all var(--transition-base); cursor: pointer; }
.feature-card:hover { transform: translateY(-10px) scale(1.02); background: rgba(229, 42, 48, 0.1); border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.feature-icon { width: 60px; height: 60px; margin: 0 auto var(--spacing-sm); color: var(--color-primary); transition: transform var(--transition-base); }
.feature-icon svg { width: 100%; height: 100%; }
.feature-card:hover .feature-icon { transform: scale(1.2) rotate(5deg); color: var(--color-primary-light); }
.feature-card h4 { color: var(--color-light); font-size: var(--font-size-xl); margin-bottom: var(--spacing-xs); }
.feature-card p { color: var(--color-gray-light); font-size: var(--font-size-base); line-height: 1.6; }
.video-container { margin: var(--spacing-lg) 0; }
.video-wrapper { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; border-radius: 20px; border: 2px solid rgba(229, 42, 48, 0.3); box-shadow: 0 10px 40px rgba(229, 42, 48, 0.2); transition: all var(--transition-base); }
.video-wrapper:hover { border-color: var(--color-primary); box-shadow: 0 15px 50px rgba(229, 42, 48, 0.4); transform: translateY(-5px); }
.video-wrapper iframe { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border-radius: 18px; }

@media (max-width: 968px) { .about-content { grid-template-columns: 1fr; } .about-features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .about { padding: var(--spacing-lg) 0; } .section-title { font-size: var(--font-size-2xl); } .about-features { grid-template-columns: 1fr; } }

/* Events Section */
.events { padding: var(--spacing-xl) 0; background-color: var(--color-dark); position: relative; overflow: hidden; }
.events::before { content: ''; position: absolute; top: -50%; right: -10%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(229, 42, 48, 0.1) 0%, transparent 70%); border-radius: 50%; animation: float 15s ease-in-out infinite; }
@keyframes float { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-50px, 50px); } }
.section-subtitle { text-align: center; color: var(--color-gray-light); font-size: var(--font-size-lg); max-width: 600px; margin: var(--spacing-sm) auto 0; }
.events-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-md); margin-top: var(--spacing-lg); }
.event-card { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 24px; padding: var(--spacing-md); position: relative; overflow: hidden; transition: all var(--transition-base); animation: fadeInUp 0.6s ease-out backwards; cursor: pointer; }
.event-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light)); transform: scaleX(0); transform-origin: left; transition: transform var(--transition-base); }
.event-card:hover::before { transform: scaleX(1); }
.event-card:hover { transform: translateY(-15px); border-color: var(--color-primary); background: rgba(229, 42, 48, 0.05); box-shadow: var(--shadow-glow); }
.event-icon { width: 60px; height: 60px; margin-bottom: var(--spacing-sm); color: var(--color-primary); transition: transform var(--transition-base); }
.event-icon svg { width: 100%; height: 100%; }
.event-card:hover .event-icon { transform: scale(1.2) rotate(-10deg); color: var(--color-primary-light); }
.event-card h3 { color: var(--color-light); font-size: var(--font-size-xl); margin-bottom: var(--spacing-sm); font-weight: 700; }
.event-card p { color: var(--color-gray-light); line-height: 1.7; font-size: var(--font-size-base); }
.event-hover-effect { position: absolute; bottom: -100%; left: 0; right: 0; height: 100%; background: linear-gradient(180deg, transparent, rgba(229, 42, 48, 0.1)); transition: bottom var(--transition-slow); pointer-events: none; }
.event-card:hover .event-hover-effect { bottom: 0; }

@media (max-width: 768px) { .events { padding: var(--spacing-lg) 0; } .events-grid { grid-template-columns: 1fr; gap: var(--spacing-sm); } .event-icon { width: 50px; height: 50px; } }

/* Board Section */
.board { padding: var(--spacing-xl) 0; background: linear-gradient(180deg, var(--color-dark) 0%, var(--color-gray) 100%); position: relative; }
.board-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-md); margin-top: var(--spacing-lg); perspective: 1000px; }
.board-card { height: 400px; position: relative; animation: fadeInUp 0.6s ease-out backwards; }
.board-card-inner { position: relative; width: 100%; height: 100%; transition: transform 0.8s; transform-style: preserve-3d; cursor: pointer; }
.board-card:hover .board-card-inner { transform: rotateY(180deg); }
.board-card-front, .board-card-back { position: absolute; width: 100%; height: 100%; backface-visibility: hidden; border-radius: 24px; padding: var(--spacing-md); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.board-card-front { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); box-shadow: var(--shadow-md); }
.board-card-back { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); transform: rotateY(180deg); box-shadow: var(--shadow-glow); }
.member-photo { width: 150px; height: 150px; margin-bottom: var(--spacing-md); border-radius: 50%; overflow: hidden; border: 4px solid var(--color-primary); box-shadow: 0 8px 24px rgba(229, 42, 48, 0.3); transition: all var(--transition-base); position: relative; }
.member-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.member-avatar { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 3rem; font-weight: 700; color: white; text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2); }
.board-card:hover .member-photo { transform: scale(1.05); box-shadow: 0 12px 32px rgba(229, 42, 48, 0.5); border-color: var(--color-primary-light); }
.board-card-front h3 { color: var(--color-light); font-size: var(--font-size-xl); margin-bottom: var(--spacing-xs); font-weight: 700; }
.member-position { color: var(--color-primary); font-size: var(--font-size-lg); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.board-card-back h3 { color: var(--color-light); font-size: var(--font-size-xl); margin-bottom: var(--spacing-sm); font-weight: 700; }
.member-description { color: rgba(255, 255, 255, 0.9); line-height: 1.7; font-size: var(--font-size-base); margin-bottom: var(--spacing-md); }
.member-contact { display: flex; gap: var(--spacing-sm); margin-top: auto; }
.contact-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: rgba(255, 255, 255, 0.1); border-radius: 50%; color: white; transition: all var(--transition-base); text-decoration: none; }
.contact-icon:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-3px); }
.contact-icon svg { width: 20px; height: 20px; }

@media (max-width: 768px) { .board { padding: var(--spacing-lg) 0; } .board-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--spacing-sm); } .board-card { height: 380px; } .member-photo { width: 120px; height: 120px; } .member-avatar { font-size: 2.5rem; } }
@media (max-width: 480px) { .board-grid { grid-template-columns: 1fr; } .board-card { height: 360px; } .member-photo { width: 100px; height: 100px; } .member-avatar { font-size: 2rem; } }

/* Sponsors Section */
.sponsors { padding: var(--spacing-xl) 0; background: var(--color-dark); position: relative; overflow: hidden; }
.sponsors::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--color-primary), transparent); }
.sponsors-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--spacing-md); margin-top: var(--spacing-lg); margin-bottom: var(--spacing-xl); }
.sponsor-card { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 16px; padding: var(--spacing-md); height: 150px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; transition: all var(--transition-base); animation: fadeInUp 0.6s ease-out backwards; }
.sponsor-card::before { content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%; background: linear-gradient(90deg, transparent, rgba(229, 42, 48, 0.1), transparent); transition: left 0.5s ease; }
.sponsor-card:hover::before { left: 100%; }
.sponsor-card:hover { transform: translateY(-5px); border-color: var(--color-primary); box-shadow: 0 10px 30px rgba(229, 42, 48, 0.2); }
.sponsor-card.university { grid-column: span 2; height: 180px; background: rgba(229, 42, 48, 0.05); border: 2px solid rgba(229, 42, 48, 0.2); }
.sponsor-logo { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; padding: var(--spacing-sm); }
.sponsor-logo img { max-width: 100%; max-height: 100%; object-fit: contain; filter: grayscale(100%) brightness(0) invert(1); opacity: 0.7; transition: all var(--transition-base); }
[data-theme='light'] .sponsor-logo img { filter: grayscale(100%) brightness(0); }
.sponsor-card:hover .sponsor-logo img { filter: grayscale(0%) brightness(1) invert(0); opacity: 1; }
.sponsor-card.university .sponsor-logo img { filter: grayscale(0%) brightness(1); opacity: 1; }
.sponsor-overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: var(--spacing-xs); background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent); opacity: 0; transition: opacity var(--transition-base); }
.sponsor-card:hover .sponsor-overlay { opacity: 1; }
.sponsor-overlay p { color: #ffffff; font-size: var(--font-size-sm); text-align: center; margin: 0; }
.become-sponsor { text-align: center; padding: var(--spacing-lg); background: linear-gradient(135deg, rgba(229, 42, 48, 0.1) 0%, rgba(229, 42, 48, 0.05) 100%); border-radius: 24px; border: 1px solid rgba(229, 42, 48, 0.2); }
.become-sponsor h3 { color: var(--color-light); font-size: var(--font-size-2xl); margin-bottom: var(--spacing-sm); font-weight: 700; }
.become-sponsor p { color: var(--color-gray-light); font-size: var(--font-size-lg); margin-bottom: var(--spacing-md); max-width: 600px; margin-left: auto; margin-right: auto; }
.become-sponsor .btn { margin-top: var(--spacing-sm); }

@media (max-width: 768px) { .sponsors { padding: var(--spacing-lg) 0; } .sponsors-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: var(--spacing-sm); } .sponsor-card { height: 120px; } .sponsor-card.university { grid-column: span 1; height: 140px; } .become-sponsor { padding: var(--spacing-md); } .become-sponsor h3 { font-size: var(--font-size-xl); } .become-sponsor p { font-size: var(--font-size-base); } }
@media (max-width: 480px) { .sponsors-grid { grid-template-columns: 1fr; } .sponsor-card, .sponsor-card.university { height: 100px; } }

/* Contact Section */
.contact { padding: var(--spacing-xl) 0 0; background-color: var(--color-dark); position: relative; }
.contact-content { display: grid; grid-template-columns: 1fr 1.5fr; gap: var(--spacing-lg); margin-top: var(--spacing-lg); }
.contact-info { display: flex; flex-direction: column; gap: var(--spacing-md); }
.info-card { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 20px; padding: var(--spacing-md); transition: all var(--transition-base); cursor: pointer; }
.info-card:hover { transform: translateX(10px); background: rgba(229, 42, 48, 0.1); border-color: var(--color-primary); box-shadow: var(--shadow-glow); }
.info-icon { width: 50px; height: 50px; margin-bottom: var(--spacing-sm); color: var(--color-primary); transition: transform var(--transition-base); }
.info-icon svg { width: 100%; height: 100%; }
.info-card:hover .info-icon { transform: scale(1.2) rotate(5deg); color: var(--color-primary-light); }
.info-card h3 { color: var(--color-primary); font-size: var(--font-size-xl); margin-bottom: var(--spacing-xs); }
.info-card p { color: var(--color-gray-light); line-height: 1.7; }
.social-links { display: flex; flex-direction: column; gap: var(--spacing-xs); }
.social-link { color: var(--color-gray-light); transition: all var(--transition-fast); padding: var(--spacing-xs) 0; position: relative; display: inline-block; width: fit-content; }
.social-link::before { content: '→'; position: absolute; left: -20px; opacity: 0; transition: all var(--transition-fast); }
.social-link:hover { color: var(--color-primary); padding-left: 25px; }
.social-link:hover::before { opacity: 1; left: 0; }
.contact-form { background: var(--glass-bg); backdrop-filter: blur(10px); border: 1px solid var(--glass-border); border-radius: 24px; padding: var(--spacing-lg); box-shadow: var(--shadow-md); }
.form-group { margin-bottom: var(--spacing-md); }
.form-group label { display: block; color: var(--color-light); font-weight: 600; margin-bottom: var(--spacing-xs); font-size: var(--font-size-lg); }
.form-group input, .form-group textarea { width: 100%; padding: var(--spacing-sm); background: var(--glass-bg); border: 2px solid var(--glass-border); border-radius: 12px; color: var(--color-light); font-size: var(--font-size-base); font-family: var(--font-family); transition: all var(--transition-base); }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--color-primary); background: rgba(229, 42, 48, 0.05); box-shadow: 0 0 0 3px rgba(229, 42, 48, 0.1); }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--color-gray-light); opacity: 0.5; }
.form-group textarea { resize: vertical; min-height: 120px; }
.submit-btn { width: 100%; margin-top: var(--spacing-sm); font-size: var(--font-size-lg); padding: var(--spacing-sm) var(--spacing-md); }
.footer { margin-top: var(--spacing-xl); padding: var(--spacing-lg) 0; border-top: 1px solid var(--glass-border); text-align: center; }
.footer p { color: var(--color-gray-light); margin-bottom: var(--spacing-xs); }
.footer-subtitle { font-size: var(--font-size-sm); opacity: 0.7; }

@media (max-width: 968px) { .contact-content { grid-template-columns: 1fr; } .contact-info { order: 2; } .contact-form { order: 1; } }
@media (max-width: 768px) { .contact { padding: var(--spacing-lg) 0 0; } .contact-form { padding: var(--spacing-md); } }

/* WhatsApp Button */
.whatsapp-float { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background: linear-gradient(135deg, #25D366 0%, #128C7E 100%); border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); z-index: 1000; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); cursor: pointer; text-decoration: none; animation: slideIn 0.5s ease-out; }
.whatsapp-float:hover { transform: scale(1.1) translateY(-5px); box-shadow: 0 8px 30px rgba(37, 211, 102, 0.6); }
.whatsapp-float:active { transform: scale(0.95); }
.whatsapp-icon { width: 32px; height: 32px; color: #ffffff; transition: transform 0.3s ease; }
.whatsapp-float:hover .whatsapp-icon { transform: rotate(15deg); }
.whatsapp-float::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100%; height: 100%; border-radius: 50%; background: rgba(37, 211, 102, 0.3); animation: pulse 2s infinite; }
@keyframes pulse { 0% { transform: translate(-50%, -50%) scale(1); opacity: 1; } 100% { transform: translate(-50%, -50%) scale(1.5); opacity: 0; } }
@keyframes slideIn { from { transform: translateY(100px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

@media (max-width: 768px) { .whatsapp-float { width: 50px; height: 50px; bottom: 20px; right: 20px; } .whatsapp-icon { width: 26px; height: 26px; } }

/* Particles Background */
.particles-background { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; overflow: hidden; }
.particle { position: absolute; width: 4px; height: 4px; background: var(--color-primary); border-radius: 50%; opacity: 0.3; animation: particleFloat 20s infinite linear; }
@keyframes particleFloat { 0% { transform: translateY(100vh) rotate(0deg); opacity: 0; } 10% { opacity: 0.3; } 90% { opacity: 0.3; } 100% { transform: translateY(-100vh) rotate(720deg); opacity: 0; } }

/* Language specific styles */
[data-lang="en"] .lang-tr { display: none; }
[data-lang="tr"] .lang-en { display: none; }