@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
  --bg-color: #f8fafc;
  --bg-secondary: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-blue: #2563eb;
  --accent-purple: #7c3aed;
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(0, 0, 0, 0.08);
  --glass-bg: rgba(255, 255, 255, 0.85);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  font-family: 'Pretendard', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  word-break: keep-all;
}

/* Gradient effects */
.bg-gradient-spot {
  position: absolute;
  top: -100px;
  left: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, rgba(255, 255, 255,0) 70%);
  z-index: -1;
  pointer-events: none;
}
.bg-gradient-spot-2 {
  position: absolute;
  top: 30%;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(139,92,246,0.15) 0%, rgba(255, 255, 255,0) 70%);
  z-index: -1;
  pointer-events: none;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  border-bottom: 1px solid var(--card-border);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary {
  border: none;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  color: white;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--text-primary);
  border: 1.5px solid rgba(37, 99, 235, 0.3);
  backdrop-filter: blur(5px);
}

.btn-secondary:hover {
  background: rgba(37, 99, 235, 0.08);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Hero section contact button - clearly visible on light background */
.btn-hero-secondary {
  background: rgba(255, 255, 255, 0.9);
  color: var(--accent-blue);
  border: 2px solid var(--accent-blue);
  font-weight: 700;
  backdrop-filter: blur(5px);
}

.btn-hero-secondary:hover {
  background: var(--accent-blue);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

/* Hero Section */
.hero {
  padding-top: 150px;
  padding-bottom: 100px;
  position: relative;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.hero-content {
  flex: 1;
  min-width: 0;
}

.hero-title {
  font-size: clamp(1.6rem, 2vw, 2.6rem);
  font-weight: 800;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
  white-space: nowrap;
}

.text-gradient {
  background: linear-gradient(90deg, #60a5fa, #c084fc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  width: 100%;
  max-width: 500px;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
  100% { transform: translateY(0px); }
}

/* Core Message */
.section {
  padding: 100px 0;
}

.core-message {
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}

.core-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(90deg, #1e293b, #64748b);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.core-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

/* Core Services - Cards */
.services-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 4rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  justify-content: center;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2.5rem;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.card:hover {
  transform: translateY(-10px);
  border-color: rgba(0, 0, 0,0.2);
  box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-number {
  font-size: 3rem;
  font-weight: 800;
  color: rgba(0, 0, 0,0.05);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}

.card-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  margin-top: 1.5rem;
}

.card-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Why PGO */
.why-pgo {
  background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

.why-item {
  text-align: center;
  padding: 2rem;
}

.why-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--accent-blue);
  transition: all 0.3s ease;
}

.why-item:hover .why-icon {
  background: var(--accent-blue);
  color: white;
  transform: scale(1.1) rotate(5deg);
}

.why-title {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Application Areas */
.areas-section {
  text-align: center;
}

.areas-flex {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 3rem;
}

.area-badge {
  padding: 1rem 2rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 50px;
  font-weight: 500;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

.area-badge:hover {
  background: rgba(0, 0, 0,0.1);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-3px);
}

/* CTA */
.cta-section {
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box {
  background: linear-gradient(135deg, rgba(37,99,235,0.12) 0%, rgba(124,58,237,0.18) 100%);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 5rem 3rem;
  border-radius: 30px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 50%, rgba(59,130,246,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(139,92,246,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(90deg, rgba(37,99,235,0.15), rgba(124,58,237,0.15));
  border: 1px solid rgba(37, 99, 235, 0.3);
  color: var(--accent-blue);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
}

.cta-title {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.8;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.btn-cta-primary {
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  color: white;
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
  transition: all 0.3s ease;
}

.btn-cta-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.55);
}

.btn-cta-secondary {
  background: transparent;
  color: var(--text-primary);
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 50px;
  border: 1.5px solid rgba(37, 99, 235, 0.35);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  transition: all 0.3s ease;
}

.btn-cta-secondary:hover {
  background: rgba(37, 99, 235, 0.06);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  transform: translateY(-3px);
}

.cta-contact-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.cta-contact-info span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cta-contact-info i {
  color: var(--accent-blue);
}

/* Page Headers (Common for subpages) */
.page-header {
  padding-top: 150px;
  padding-bottom: 50px;
  text-align: center;
  position: relative;
  z-index: 10;
}
.page-title {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Footer */
footer {
  border-top: 1px solid var(--card-border);
  padding: 4rem 0 2rem;
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.footer-info {
  font-size: 0.9rem;
  line-height: 1.8;
}

.copyright {
  margin-top: 2rem;
  font-size: 0.8rem;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { flex-direction: column; text-align: center; }
  .hero-title { font-size: 2.8rem; }
  .hero-buttons { justify-content: center; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .why-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
  .card { padding: 1.5rem; }
}

/* Scroll Fade Animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Dropdown Menu Styles */
.dropdown {
  position: relative;
  display: inline-block;
  padding: 15px 0; /* Hover bridge gap */
}

.dropdown-content {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-secondary);
  min-width: 200px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
  border-radius: 16px;
  padding: 1rem 0;
  z-index: 1001;
  border: 1px solid var(--card-border);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dropdown:hover .dropdown-content {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(-5px);
}

.dropdown-content a {
  color: var(--text-secondary) !important;
  padding: 0.8rem 1.5rem;
  text-decoration: none;
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background 0.2s ease, color 0.2s ease;
  text-align: center;
}

.dropdown-content a:hover {
  background-color: rgba(37,99,235,0.05);
  color: var(--accent-blue) !important;
}

.dropbtn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.dropbtn i {
  font-size: 0.7rem;
  transition: transform 0.3s ease;
  margin-top: 2px;
}

.dropdown:hover .dropbtn i {
  transform: rotate(180deg);
}