@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css");
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

:root {
  /* Primary Colors */
  --ieum-teal: #00897B;
  --ieum-teal-dark: #00695C;
  --ieum-teal-light: #4DB6AC;
  
  /* Secondary Colors */
  --ieum-coral: #FF6B6B;
  --ieum-coral-dark: #EE5A5A;
  --ieum-coral-light: #FF8A8A;
  
  /* Neutral Colors */
  --ieum-black: #1A1A2E;
  --ieum-gray-900: #2D2D44;
  --ieum-gray-100: #F5F5F7;
  --ieum-white: #FFFFFF;
  
  /* Gradients */
  --gradient-main: linear-gradient(135deg, var(--ieum-teal) 0%, var(--ieum-coral) 100%);
  --gradient-teal: linear-gradient(180deg, var(--ieum-teal) 0%, var(--ieum-teal-dark) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(0, 137, 123, 0.4) 0%, rgba(255, 107, 107, 0.4) 100%);
  
  font-family: 'Pretendard', 'Inter', sans-serif;
}

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

body {
  background-color: var(--ieum-black);
  color: var(--ieum-white);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; letter-spacing: -0.02em; }
h2 { font-size: 2.5rem; letter-spacing: -0.02em; }
h3 { font-size: 1.75rem; letter-spacing: -0.01em; }

.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gray {
  color: #A0A0B0;
}

/* UI Components */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-align: center;
}

.btn-primary {
  background: var(--gradient-teal);
  color: var(--ieum-white);
  border: none;
  box-shadow: 0 8px 24px rgba(0, 137, 123, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 137, 123, 0.5);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--ieum-teal);
  color: var(--ieum-teal-light);
}

.btn-secondary:hover {
  background: rgba(0, 137, 123, 0.1);
  transform: translateY(-2px);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 20px 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

header.scrolled {
  background: rgba(26, 26, 46, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 12px 0;
}

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

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a:hover {
  color: var(--ieum-teal-light);
}

/* Glassmorphism */
.glass-card {
  background: rgba(45, 45, 68, 0.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  padding: 40px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 137, 123, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
footer {
  background: #111122;
  padding: 60px 0 40px;
  margin-top: 100px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--ieum-white);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: var(--text-gray);
}

.footer-col ul li a:hover {
  color: var(--ieum-white);
}

.copyright {
  text-align: center;
  margin-top: 60px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.05);
  color: #888;
  font-size: 0.9rem;
}

/* Blob Background */
.bg-blobs {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

.blob {
  position: absolute;
  filter: blur(100px);
  opacity: 0.5;
  border-radius: 50%;
  animation: float 20s infinite alternate ease-in-out;
}

.blob-1 {
  width: 600px;
  height: 600px;
  background: rgba(0, 137, 123, 0.15);
  top: -100px;
  left: -100px;
}

.blob-2 {
  width: 400px;
  height: 400px;
  background: rgba(255, 107, 107, 0.1);
  top: 40%;
  right: -50px;
  animation-delay: -5s;
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, 50px) scale(1.1); }
  100% { transform: translate(-20px, 20px) scale(0.9); }
}

@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  .nav-links { display: none; }
  .glass-card { padding: 24px; }
}