/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
  color: #2c3e50;
  background: #f8f9fc;
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== CSS VARIABLES ===== */
:root {
  --deep-blue: #1a365d;
  --medium-blue: #2b6cb0;
  --light-blue: #bee3f8;
  --accent-blue: #3182ce;
  --warm-white: #fdfcfb;
  --soft-gray: #f0f2f5;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-light: #718096;
  --gold: #d4a853;
  --success: #48bb78;
  --gradient-blue: linear-gradient(135deg, #1a365d 0%, #2b6cb0 100%);
  --gradient-hero: linear-gradient(135deg, rgba(26,54,93,0.92) 0%, rgba(43,108,176,0.85) 100%);
  --shadow-sm: 0 2px 8px rgba(26,54,93,0.08);
  --shadow-md: 0 8px 30px rgba(26,54,93,0.12);
  --shadow-lg: 0 20px 60px rgba(26,54,93,0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(26,54,93,0.08);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: var(--shadow-sm);
}
.nav-container {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.3rem; font-weight: 800; color: var(--deep-blue);
}
.nav-logo img { height: 36px; width: auto; }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
  position: relative; transition: var(--transition);
}
.nav-links a:hover { color: var(--deep-blue); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--accent-blue);
  transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 10px 24px; border-radius: 50px;
  background: var(--gradient-blue); color: #fff;
  font-weight: 600; font-size: 0.9rem;
  transition: var(--transition); border: none; cursor: pointer;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(43,108,176,0.35); }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span {
  display: block; width: 24px; height: 2px; background: var(--deep-blue);
  margin: 6px 0; transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('hero-bg.png') center/cover no-repeat;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: var(--gradient-hero);
}
.hero-particles {
  position: absolute; inset: 0; overflow: hidden;
}
.particle {
  position: absolute; border-radius: 50%;
  background: rgba(255,255,255,0.1);
  animation: float-particle linear infinite;
}
@keyframes float-particle {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 1200px; margin: 0 auto; padding: 120px 24px 80px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-text { color: #fff; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: 50px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  font-size: 0.91rem; font-weight: 500;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease-out;
}
.hero-badge span { color: var(--gold); }
.hero-title {
  font-size: 3.2rem; font-weight: 800; line-height: 1.25;
  margin-bottom: 20px;
  animation: fadeInUp 0.8s ease-out 0.15s both;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--light-blue), #fff);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem; line-height: 1.8; opacity: 0.9;
  margin-bottom: 36px;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}
.hero-buttons {
  display: flex; gap: 16px; flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.45s both;
}
.btn-primary {
  padding: 16px 36px; border-radius: 50px;
  background: #fff; color: var(--deep-blue);
  font-weight: 700; font-size: 1rem;
  transition: var(--transition); border: none; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 35px rgba(0,0,0,0.2); }
.btn-secondary {
  padding: 16px 36px; border-radius: 50px;
  background: transparent; color: #fff;
  font-weight: 600; font-size: 1rem;
  border: 2px solid rgba(255,255,255,0.4);
  transition: var(--transition); cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.hero-image {
  animation: fadeInRight 1s ease-out 0.3s both;
}
.hero-image img {
  border-radius: 24px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.3);
}
.hero-stats {
  display: flex; gap: 40px; margin-top: 48px;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}
.stat-item { text-align: center; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--gold); }
.stat-label { font-size: 0.86rem; opacity: 0.8; margin-top: 4px; }

/* ===== SECTIONS COMMON ===== */
.section { padding: 100px 24px; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: 50px;
  background: rgba(49,130,206,0.1); color: var(--accent-blue);
  font-size: 0.91rem; font-weight: 600; margin-bottom: 16px;
}
.section-title {
  font-size: 2.4rem; font-weight: 800; color: var(--deep-blue);
  line-height: 1.35; margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem; color: var(--text-secondary);
  max-width: 600px; margin: 0 auto; line-height: 1.8;
}
.container { max-width: 1200px; margin: 0 auto; }

/* ===== ABOUT PSG ===== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-image { position: relative; }
.about-image img { border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.about-image-badge {
  position: absolute; bottom: -20px; right: -20px;
  background: var(--gradient-blue); color: #fff;
  padding: 20px 28px; border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.about-image-badge .badge-number { font-size: 1.8rem; font-weight: 800; }
.about-image-badge .badge-text { font-size: 0.86rem; opacity: 0.9; }
.about-text h3 { font-size: 1.6rem; font-weight: 700; color: var(--deep-blue); margin-bottom: 20px; }
.about-text p { color: var(--text-secondary); margin-bottom: 24px; line-height: 1.8; }
.check-items { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.check-item {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; border-radius: var(--radius-sm);
  background: var(--soft-gray); transition: var(--transition);
}
.check-item:hover { background: var(--light-blue); transform: translateX(4px); }
.check-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--gradient-blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.91rem; flex-shrink: 0;
}
.check-label { font-size: 0.9rem; font-weight: 500; color: var(--text-primary); }

/* ===== INDICATIONS ===== */
.indications { background: var(--warm-white); }
.indications-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.indication-card {
  background: #fff; border-radius: var(--radius); padding: 36px 28px;
  text-align: center; transition: var(--transition);
  border: 1px solid rgba(26,54,93,0.06);
  position: relative; overflow: hidden;
}
.indication-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--gradient-blue);
  transform: scaleX(0); transition: var(--transition);
}
.indication-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.indication-card:hover::before { transform: scaleX(1); }
.indication-icon {
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(49,130,206,0.1), rgba(26,54,93,0.08));
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; font-size: 2rem;
  transition: var(--transition);
}
.indication-card:hover .indication-icon {
  background: var(--gradient-blue); transform: scale(1.1);
}
.indication-card:hover .indication-icon svg { stroke: #fff; }
.indication-title { font-size: 1.1rem; font-weight: 700; color: var(--deep-blue); margin-bottom: 12px; }
.indication-desc { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== PROCESS ===== */
.process-timeline { max-width: 650px; margin: 0 auto; display: flex; flex-direction: column; gap: 32px; }
.process-step {
  display: flex; align-items: center; gap: 24px;
}
.process-step-content {
  flex: 1; background: #fff; border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow-sm);
  border: 1px solid rgba(26,54,93,0.06);
  transition: var(--transition);
}
.process-step-content:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.process-number {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-blue); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem; flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(43,108,176,0.3);
}
.process-step-content h4 { font-size: 1.15rem; font-weight: 700; color: var(--deep-blue); margin-bottom: 8px; }
.process-step-content .step-time { font-size: 0.86rem; color: var(--accent-blue); font-weight: 600; margin-bottom: 12px; }
.process-step-content p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== INSURANCE ===== */
.insurance { background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fe 100%); }
.insurance-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.insurance-card {
  background: #fff; border-radius: var(--radius); padding: 40px;
  box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
}
.insurance-card.highlight {
  background: var(--gradient-blue); color: #fff;
}
.insurance-card.highlight h3,
.insurance-card.highlight p { color: #fff; }
.insurance-card.highlight .insurance-percent { color: var(--gold); }
.insurance-icon { font-size: 2.5rem; margin-bottom: 20px; }
.insurance-card h3 { font-size: 1.3rem; font-weight: 700; color: var(--deep-blue); margin-bottom: 16px; }
.insurance-card p { color: var(--text-secondary); line-height: 1.8; font-size: 0.95rem; }
.insurance-percent { font-size: 3rem; font-weight: 800; color: var(--accent-blue); margin: 16px 0; }
.insurance-note {
  margin-top: 24px; padding: 16px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.15); font-size: 0.91rem;
}

/* ===== SELF DIAGNOSIS ===== */
.diagnosis { background: var(--warm-white); }
.diagnosis-container {
  max-width: 700px; margin: 0 auto;
  background: #fff; border-radius: var(--radius);
  padding: 48px; box-shadow: var(--shadow-md);
  border: 1px solid rgba(26,54,93,0.06);
}
.diagnosis-question {
  padding: 20px 0; border-bottom: 1px solid var(--soft-gray);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.diagnosis-question:last-child { border-bottom: none; }
.diagnosis-question label { font-size: 0.95rem; color: var(--text-primary); font-weight: 500; cursor: pointer; flex: 1; }
.toggle-switch {
  position: relative; width: 52px; height: 28px; flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; inset: 0; border-radius: 50px;
  background: #cbd5e0; cursor: pointer; transition: var(--transition);
}
.toggle-slider::before {
  content: ''; position: absolute; left: 3px; top: 3px;
  width: 22px; height: 22px; border-radius: 50%;
  background: #fff; transition: var(--transition);
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}
.toggle-switch input:checked + .toggle-slider { background: var(--accent-blue); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(24px); }
.diagnosis-result {
  margin-top: 32px; padding: 28px; border-radius: var(--radius-sm);
  text-align: center; transition: var(--transition);
  display: none;
}
.diagnosis-result.show { display: block; }
.diagnosis-result.low { background: linear-gradient(135deg, #f0fff4, #c6f6d5); }
.diagnosis-result.medium { background: linear-gradient(135deg, #fffff0, #fefcbf); }
.diagnosis-result.high { background: linear-gradient(135deg, #fff5f5, #fed7d7); }
.result-icon { font-size: 2.5rem; margin-bottom: 12px; }
.result-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.result-desc { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.7; }
.diagnosis-btn {
  margin-top: 28px; width: 100%; padding: 16px;
  border-radius: 50px; border: none;
  background: var(--gradient-blue); color: #fff;
  font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: var(--transition);
}
.diagnosis-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(43,108,176,0.35); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: var(--radius-sm);
  margin-bottom: 12px; overflow: hidden;
  border: 1px solid rgba(26,54,93,0.06);
  transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  padding: 22px 28px; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600; color: var(--text-primary); font-size: 1rem;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent-blue); }
.faq-arrow { transition: transform 0.3s ease; font-size: 1.2rem; color: var(--text-light); }
.faq-item.active .faq-arrow { transform: rotate(180deg); color: var(--accent-blue); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 28px 22px;
  font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8;
}

/* ===== MAP ===== */
.map-section { background: var(--warm-white); }
.map-grid { max-width: 600px; margin: 0 auto; }
.map-card {
  background: #fff; border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid rgba(26,54,93,0.06);
  transition: var(--transition);
}
.map-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.map-frame {
  width: 100%; height: 280px; border: none;
}
.map-info { padding: 28px; }
.map-info h3 { font-size: 1.15rem; font-weight: 700; color: var(--deep-blue); margin-bottom: 12px; }
.map-detail {
  display: flex; align-items: flex-start; gap: 10px;
  margin-bottom: 10px; font-size: 0.9rem; color: var(--text-secondary);
}
.map-detail svg { flex-shrink: 0; margin-top: 3px; }
.map-link {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 16px; padding: 12px 24px; border-radius: 50px;
  background: #03c75a; color: #fff;
  font-weight: 600; font-size: 0.9rem;
  transition: var(--transition);
}
.map-link:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(3,199,90,0.3); }

/* ===== FOOTER ===== */
.footer {
  background: var(--deep-blue); color: rgba(255,255,255,0.8);
  padding: 60px 24px 30px;
}
.footer-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand { font-size: 1.5rem; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 350px; }
.footer h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.footer-links a { display: block; font-size: 0.9rem; margin-bottom: 10px; transition: var(--transition); }
.footer-links a:hover { color: #fff; transform: translateX(4px); }
.footer-bottom {
  max-width: 1200px; margin: 24px auto 0;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.86rem; opacity: 0.6;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(26,54,93,0.97); z-index: 999;
  flex-direction: column; align-items: center; justify-content: center; gap: 24px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  color: #fff; font-size: 1.3rem; font-weight: 600;
  padding: 12px 24px; transition: var(--transition);
}
.mobile-nav a:hover { color: var(--gold); }
.mobile-nav-close {
  position: absolute; top: 20px; right: 24px;
  background: none; border: none; color: #fff;
  font-size: 2rem; cursor: pointer;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; padding-top: 140px; }
  .hero-image { display: none; }
  .hero-title { font-size: 2.4rem; }
  .hero-buttons { justify-content: center; }
  .hero-stats { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .indications-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step {
    flex-direction: row; padding-left: 0;
  }
  .insurance-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .hero-title { font-size: 1.9rem; }
  .hero-subtitle { font-size: 1rem; }
  .section { padding: 70px 20px; }
  .section-title { font-size: 1.8rem; }
  .indications-grid { grid-template-columns: 1fr; }
  .check-items { grid-template-columns: 1fr; }
  .diagnosis-container { padding: 28px 20px; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .btn-primary, .btn-secondary { padding: 14px 28px; font-size: 0.9rem; }
}