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

body, html {
  width: 100%;
  height: 100%;
  font-family: 'Noto Sans KR', 'Outfit', sans-serif;
  overflow: hidden; /* No scroll on landing */
}

/* Background Image Layer */
.bg-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('landing_bg.png') center/cover no-repeat;
  z-index: -2;
  transition: transform 10s ease-out;
  will-change: transform;
}

/* Animation to add slightly moving effect to background */
@keyframes slowZoom {
  0% { transform: scale(1); }
  100% { transform: scale(1.05); }
}
.bg-layer {
  animation: slowZoom 20s infinite alternate;
}

/* Dark Gradient Overlay for Readability */
body::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 15, 26, 0.9) 0%, rgba(8, 15, 26, 0.4) 50%, rgba(8, 15, 26, 0.1) 100%);
  z-index: -1;
}

/* Layout */
.landing-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: 100%;
  padding: 0 8vw;
}

/* Header Text */
.landing-header {
  color: white;
  max-width: 600px;
  animation: fadeUp 1s ease forwards;
  opacity: 0;
  transform: translateY(30px);
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: #a7f3d0;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.landing-header h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.landing-header .highlight {
  color: #34d399; /* Emerald */
}

.landing-header .subtitle {
  font-size: 1.3rem;
  font-weight: 300;
  color: #e2e8f0;
  line-height: 1.5;
}

/* Glassmorphism Panel */
.glass-panel {
  background: rgba(15, 23, 42, 0.6); /* 어두운 배경으로 텍스트 선명하게 */
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 24px 40px rgba(0, 0, 0, 0.6);
  border-radius: 20px;
}

/* Navigation Menu */
.landing-nav {
  width: 400px;
  padding: 2.5rem;
  animation: fadeLeft 1s ease 0.3s forwards;
  opacity: 0;
  transform: translateX(30px);
}

.landing-nav h2 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 2rem;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 1rem;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.nav-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  text-align: left;
}

.nav-btn.year-2024 {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.8), rgba(5, 150, 105, 0.95)); /* 명확하고 강렬한 초록색 */
  border-color: rgba(52, 211, 153, 0.8);
  box-shadow: 0 8px 16px rgba(5, 150, 105, 0.4);
}

.nav-btn.year-2024:hover {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.4), rgba(5, 150, 105, 0.6));
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(5, 150, 105, 0.3);
}

.nav-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.nav-btn.disabled:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-btn .year {
  font-family: 'Outfit', sans-serif;
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 0.3rem;
  display: block;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.nav-btn .desc {
  font-size: 1.05rem;
  font-weight: 400;
  color: #f1f5f9;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.nav-btn.year-2024 .desc {
  color: #fff;
  font-weight: 500;
}

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

@keyframes fadeLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .landing-container {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    gap: 3rem;
  }
  
  .landing-header {
    animation: fadeUp 1s ease forwards;
  }
  
  .landing-nav {
    animation: fadeUp 1s ease 0.3s forwards;
    transform: translateY(30px);
  }

  body::before {
    background: linear-gradient(180deg, rgba(8, 15, 26, 0.8) 0%, rgba(8, 15, 26, 0.9) 100%);
  }
}