/* ==========================================================================
   샘과나무 선교회 (Springs & Trees Mission Society)
   Warm Wood & Golden Amber Premium Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Nanum+Myeongjo:wght@400;700;800&family=Outfit:wght@300;400;500;600;700;800&family=Pretendard:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Warm Wood & Amber Palette (샘플 이미지 기준 부드럽고 따뜻한 브라운 테마) */
  --bg-dark: #241610;
  --bg-dark-soft: #2e1c15;
  --bg-surface: #382319;
  --bg-card: rgba(56, 35, 25, 0.72);
  --bg-card-hover: rgba(78, 49, 36, 0.88);
  
  --wood-900: #1a0f0a;
  --wood-800: #26160f;
  --wood-700: #3b2419;
  --wood-600: #523324;
  --wood-500: #6f4531;
  --wood-400: #966147;
  --wood-300: #c48768;
  --wood-200: #e4b59c;
  --wood-100: #faebe2;
  
  /* Forest Accent (Subtle) */
  --forest-400: #4d8268;
  --forest-300: #6ea88d;
  --forest-200: #9fcbb5;
  
  /* Golden Amber */
  --gold-500: #d4a574;
  --gold-400: #e8bf8f;
  --gold-300: #f5d7b5;
  --gold-glow: rgba(212, 165, 116, 0.35);

  --water-cyan: #60a5fa;
  --water-glow: rgba(96, 165, 250, 0.25);
  
  --text-primary: #fdfbf7;
  --text-secondary: #e2d7cf;
  --text-muted: #b5a498;
  
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glass-gold: rgba(212, 165, 116, 0.28);
  --border-glass-hover: rgba(196, 135, 104, 0.45);
  
  --glass-bg: rgba(46, 28, 21, 0.68);
  --glass-blur: blur(16px);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.65);
  --shadow-gold: 0 0 30px rgba(212, 165, 116, 0.22);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-dark);
}

body {
  font-family: 'Pretendard', 'Outfit', -apple-system, sans-serif;
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(68, 41, 29, 0.6) 0px, transparent 60%),
    radial-gradient(at 100% 50%, rgba(55, 33, 23, 0.5) 0px, transparent 55%),
    radial-gradient(at 50% 100%, rgba(38, 22, 15, 0.7) 0px, transparent 65%);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Atmosphere Glows */
.bg-ambient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.35;
  will-change: transform;
  animation: floatAmbient 20s infinite alternate ease-in-out;
}

.ambient-1 {
  top: -10%;
  left: 10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #663b27, transparent 70%);
}

.ambient-2 {
  top: 40%;
  right: -5%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, #4a2a1b, transparent 70%);
  animation-duration: 25s;
}

.ambient-3 {
  bottom: 5%;
  left: 20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #855230, transparent 75%);
  opacity: 0.25;
  animation-duration: 18s;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-30px, -20px) scale(0.95); }
}

/* Typography Helpers */
h1, h2, h3, h4, .font-serif {
  font-family: 'Nanum Myeongjo', 'Pretendard', serif;
  letter-spacing: -0.02em;
}

.font-sans {
  font-family: 'Pretendard', 'Outfit', sans-serif;
}

.gradient-text-gold {
  background: linear-gradient(135deg, #fff2e0 0%, #e8bf8f 50%, #c48768 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-text-emerald {
  background: linear-gradient(135deg, #faebe2 0%, #d4a574 50%, #966147 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

.section-padding {
  padding: 6.5rem 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 4rem 0;
  }
}

.text-center { text-align: center; }
.text-left { text-align: left; }

/* Section Headers */
.section-header {
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(212, 165, 116, 0.14);
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.section-tag i {
  color: var(--gold-400);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .section-title {
    font-size: 1.9rem;
  }
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  font-weight: 300;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.header-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: all var(--transition-normal);
}

.header-nav.scrolled {
  padding: 0.75rem 0;
  background: rgba(36, 22, 16, 0.92);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-symbol {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--wood-600), var(--wood-400));
  border: 1px solid var(--border-glass-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  box-shadow: 0 4px 15px rgba(82, 51, 36, 0.4);
  font-size: 1.3rem;
}

.logo-text h1 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.01em;
}

.logo-text span {
  font-size: 0.7rem;
  color: var(--wood-200);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--gold-400), var(--wood-300));
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold-400) 0%, var(--gold-500) 100%);
  color: #241610;
  box-shadow: 0 4px 20px rgba(212, 165, 116, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 165, 116, 0.5);
  background: linear-gradient(135deg, #f7d8b3 0%, var(--gold-400) 100%);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

.btn-emerald {
  background: linear-gradient(135deg, var(--wood-500) 0%, var(--wood-600) 100%);
  color: #fff;
  border: 1px solid var(--border-glass-gold);
  box-shadow: 0 4px 15px rgba(82, 51, 36, 0.35);
}

.btn-emerald:hover {
  background: linear-gradient(135deg, var(--wood-400) 0%, var(--wood-500) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(212, 165, 116, 0.4);
}

.btn-outline-gold {
  background: transparent;
  color: var(--gold-300);
  border: 1px solid var(--border-glass-gold);
}

.btn-outline-gold:hover {
  background: rgba(212, 165, 116, 0.15);
  border-color: var(--gold-400);
  color: #fff;
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.4rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 30%, rgba(70, 43, 31, 0.65) 0%, rgba(36, 22, 16, 0.95) 80%);
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1.1rem;
  background: rgba(212, 165, 116, 0.14);
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: var(--gold-300);
  margin-bottom: 1.5rem;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--gold-400);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--gold-400);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(212, 165, 116, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(212, 165, 116, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(212, 165, 116, 0); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: #fff;
}

.hero-title span.highlight {
  display: block;
}

.hero-verse {
  font-family: 'Nanum Myeongjo', serif;
  font-size: 1.15rem;
  color: var(--wood-100);
  line-height: 1.7;
  padding: 1.2rem 1.5rem;
  background: rgba(56, 35, 25, 0.55);
  border-left: 3px solid var(--gold-400);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: 2rem;
}

.hero-verse cite {
  display: block;
  font-size: 0.88rem;
  color: var(--gold-400);
  margin-top: 0.4rem;
  font-style: normal;
  font-family: 'Pretendard', sans-serif;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-glass);
}

.stat-item h3 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--gold-300);
  margin-bottom: 0.2rem;
  font-family: 'Outfit', sans-serif;
}

.stat-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Hero Showcase Card */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.showcase-card {
  position: relative;
  width: 100%;
  max-width: 440px;
  background: linear-gradient(145deg, rgba(62, 38, 28, 0.85), rgba(36, 22, 16, 0.95));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-lg), var(--shadow-gold);
  backdrop-filter: var(--glass-blur);
  overflow: hidden;
}

.showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-glass);
}

.showcase-title-tag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gold-300);
}

.flipbook-mini-preview {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 1.5rem;
  aspect-ratio: 16/10;
  background: #150d09;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6);
}

.flipbook-mini-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.flipbook-mini-preview:hover img {
  transform: scale(1.06);
}

.mini-overlay-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(26, 16, 11, 0.85);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.showcase-info h4 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: #fff;
}

.showcase-info p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.floating-pill {
  position: absolute;
  bottom: -15px;
  right: -15px;
  background: rgba(46, 28, 20, 0.95);
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-full);
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: var(--shadow-md);
  color: #fff;
  font-size: 0.85rem;
  animation: floatMini 4s ease-in-out infinite alternate;
}

@keyframes floatMini {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

/* ==========================================================================
   Vision & Story Section
   ========================================================================== */
.vision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.vision-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 3rem;
  backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}

.vision-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--wood-400), var(--gold-400));
}

.vision-card h3 {
  font-size: 1.8rem;
  margin-bottom: 1.2rem;
  color: #fff;
}

.vision-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.vision-pillars {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pillar-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.pillar-item:hover {
  background: rgba(212, 165, 116, 0.1);
  border-color: var(--border-glass-hover);
  transform: translateX(6px);
}

.pillar-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(212, 165, 116, 0.18);
  color: var(--gold-300);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
}

.pillar-content h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.pillar-content p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Founder Story Box */
.story-box {
  background: linear-gradient(145deg, rgba(62, 38, 28, 0.7), rgba(42, 26, 18, 0.9));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  position: relative;
}

.quote-icon {
  font-size: 2.5rem;
  color: var(--gold-400);
  opacity: 0.4;
  margin-bottom: 1rem;
}

.story-lead {
  font-family: 'Nanum Myeongjo', serif;
  font-size: 1.2rem;
  color: #fff;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.story-body {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.founder-signature {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border-glass);
}

.founder-info h5 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.founder-info span {
  font-size: 0.82rem;
  color: var(--wood-200);
}

/* ==========================================================================
   4 Major Ministries Section
   ========================================================================== */
.ministries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.ministry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 2.2rem 1.8rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  backdrop-filter: var(--glass-blur);
}

.ministry-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  transition: background var(--transition-normal);
}

.ministry-card:hover {
  transform: translateY(-8px);
  background: var(--bg-card-hover);
  border-color: var(--border-glass-hover);
  box-shadow: var(--shadow-md);
}

.ministry-card:hover::before {
  background: linear-gradient(90deg, var(--wood-400), var(--gold-400));
}

.ministry-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(212, 165, 116, 0.15);
  border: 1px solid var(--border-glass-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition-fast);
}

.ministry-card:hover .ministry-icon {
  background: linear-gradient(135deg, var(--wood-500), var(--wood-600));
  color: var(--gold-300);
  border-color: var(--border-glass-gold);
  transform: scale(1.08);
}

.ministry-card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: #fff;
}

.ministry-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.ministry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: auto;
}

.ministry-tag-item {
  font-size: 0.75rem;
  padding: 0.25rem 0.65rem;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  color: var(--wood-200);
}

/* ==========================================================================
   Digital Bookshelf (플립북 라이브러리)
   ========================================================================== */
.bookshelf-section {
  position: relative;
  background: linear-gradient(180deg, var(--bg-dark) 0%, #2a1912 50%, var(--bg-dark) 100%);
}

/* Live Iframe Bookshelf Container */
.bookshelf-iframe-wrapper {
  position: relative;
  width: 100%;
  background: #1d110c;
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-gold);
  backdrop-filter: var(--glass-blur);
  margin-bottom: 2.5rem;
  transition: all var(--transition-normal);
}

.iframe-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  background: linear-gradient(135deg, rgba(62, 38, 28, 0.95), rgba(36, 22, 16, 0.98));
  border-bottom: 1px solid var(--border-glass);
}

.iframe-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.live-dot {
  width: 10px;
  height: 10px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.iframe-status-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}

.iframe-status-sub {
  font-size: 0.78rem;
  color: var(--gold-300);
  background: rgba(212, 165, 116, 0.15);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  margin-left: 0.4rem;
}

.iframe-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.iframe-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.iframe-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
  transform: translateY(-1px);
}

.iframe-btn-gold {
  background: linear-gradient(135deg, var(--gold-400), var(--gold-500));
  color: #241610;
  border: none;
}

.iframe-btn-gold:hover {
  background: linear-gradient(135deg, #f7d8b3, var(--gold-400));
  color: #000;
  box-shadow: 0 4px 15px rgba(212, 165, 116, 0.4);
}

.bookshelf-iframe {
  width: 100%;
  height: 820px;
  border: none;
  display: block;
  background: #121212;
}

@media (max-width: 768px) {
  .bookshelf-iframe {
    height: 650px;
  }
  .iframe-status-sub {
    display: none;
  }
  .iframe-header-bar {
    padding: 0.75rem 1rem;
  }
}

/* Catalog Accordion Toggle Button & Panel */
.catalog-accordion-toggle {
  width: 100%;
  background: linear-gradient(135deg, rgba(62, 38, 28, 0.85), rgba(42, 26, 18, 0.95));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: #fff;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  user-select: none;
}

.catalog-accordion-toggle:hover {
  background: linear-gradient(135deg, rgba(78, 49, 36, 0.95), rgba(52, 33, 23, 0.98));
  border-color: var(--gold-400);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 165, 116, 0.25);
}

.catalog-accordion-toggle.active {
  border-color: var(--gold-400);
  background: linear-gradient(135deg, rgba(78, 49, 36, 0.95), rgba(52, 33, 23, 0.98));
  box-shadow: var(--shadow-md), var(--shadow-gold);
}

.toggle-left {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.toggle-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(212, 165, 116, 0.18);
  border: 1px solid var(--border-glass-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  font-size: 1.1rem;
}

.toggle-title-group h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.15rem;
  letter-spacing: -0.01em;
}

.toggle-title-group p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.toggle-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.toggle-badge {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gold-300);
  background: rgba(212, 165, 116, 0.15);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-glass-gold);
}

.toggle-chevron {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.catalog-accordion-toggle.active .toggle-chevron {
  transform: rotate(180deg);
  background: var(--gold-400);
  color: #241610;
}

/* Accordion Collapsible Content */
.catalog-collapsible-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.6s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.45s ease, margin-bottom 0.4s ease;
  margin-bottom: 0;
}

.catalog-collapsible-content.open {
  max-height: 3500px;
  opacity: 1;
  margin-bottom: 3.5rem;
}

.bookshelf-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
  background: var(--bg-card);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.filter-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.filter-btn.active {
  background: var(--wood-600);
  border-color: var(--gold-400);
  color: #fff;
  box-shadow: 0 2px 10px rgba(82, 51, 36, 0.4);
}

.search-box {
  position: relative;
  min-width: 240px;
}

.search-box input {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  padding: 0.55rem 1.2rem 0.55rem 2.4rem;
  color: #fff;
  font-size: 0.88rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--gold-400);
  box-shadow: 0 0 15px rgba(212, 165, 116, 0.25);
}

.search-box i {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* 3D Shelf Grid */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 2.2rem 1.8rem;
}

/* Book Card & 3D Simulation */
.book-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  perspective: 1000px;
}

.book-card-3d {
  position: relative;
  width: 100%;
  aspect-ratio: 1/1.45;
  border-radius: 4px 10px 10px 4px;
  transform-style: preserve-3d;
  transform: rotateY(-12deg) rotateX(4deg);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
  box-shadow: 5px 8px 20px rgba(0, 0, 0, 0.6);
  margin-bottom: 1rem;
}

.book-card:hover .book-card-3d {
  transform: rotateY(0deg) rotateX(0deg) translateY(-14px) scale(1.03);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8), 0 0 25px rgba(212, 165, 116, 0.35);
}

.book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px 10px 10px 4px;
  border-left: 4px solid rgba(0, 0, 0, 0.4);
}

.book-badge-overlay {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(36, 22, 16, 0.88);
  backdrop-filter: blur(6px);
  color: var(--gold-300);
  border: 1px solid var(--border-glass-gold);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.book-hover-action {
  position: absolute;
  bottom: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--gold-400);
  color: #241610;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.book-card:hover .book-hover-action {
  opacity: 1;
  transform: scale(1);
}

.book-meta {
  padding: 0 0.2rem;
}

.book-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.25rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.book-author {
  font-size: 0.85rem;
  color: var(--wood-200);
  margin-bottom: 0.4rem;
  display: block;
}

.book-desc-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.45;
}

/* ==========================================================================
   Co-Workers Recruitment Section (동역자 모집)
   ========================================================================== */
.coworkers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 900px) {
  .coworkers-grid {
    grid-template-columns: 1fr;
  }
}

.coworker-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  backdrop-filter: var(--glass-blur);
  position: relative;
}

.coworker-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glass-gold);
  box-shadow: var(--shadow-md), var(--shadow-gold);
}

.coworker-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: rgba(212, 165, 116, 0.15);
  border: 1px solid var(--border-glass-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
}

.coworker-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: #fff;
}

.coworker-card p.subtitle {
  font-size: 0.9rem;
  color: var(--wood-200);
  margin-bottom: 1.2rem;
  font-weight: 500;
}

.coworker-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.coworker-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.coworker-list li i {
  color: var(--gold-400);
  font-size: 0.85rem;
}

/* Callout Banner */
.recruit-banner {
  background: linear-gradient(135deg, rgba(62, 38, 28, 0.75), rgba(36, 22, 16, 0.95));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  padding: 2.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  box-shadow: var(--shadow-md);
}

.recruit-banner-text h4 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #fff;
}

.recruit-banner-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Quiet Time & Scripture Widget (말씀 묵상 위젯)
   ========================================================================== */
.scripture-section {
  position: relative;
  padding: 5rem 0;
}

.scripture-container {
  max-width: 900px;
  margin: 0 auto;
  background: linear-gradient(145deg, rgba(58, 36, 26, 0.85), rgba(36, 22, 16, 0.98));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-lg), var(--shadow-gold);
  backdrop-filter: var(--glass-blur);
}

.scripture-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-400);
  margin-bottom: 1.5rem;
}

.scripture-quote {
  font-family: 'Nanum Myeongjo', serif;
  font-size: 1.6rem;
  line-height: 1.8;
  color: #fff;
  margin-bottom: 1.5rem;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.4s ease;
}

@media (max-width: 768px) {
  .scripture-quote {
    font-size: 1.25rem;
  }
}

.scripture-reference {
  font-size: 1rem;
  color: var(--wood-200);
  font-weight: 600;
  margin-bottom: 2rem;
}

.scripture-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
}

.scripture-nav-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.scripture-nav-btn:hover {
  background: var(--gold-400);
  color: #241610;
  border-color: var(--gold-400);
  transform: scale(1.1);
}

/* ==========================================================================
   Sponsorship & Contact Section (후원 및 오시는 길)
   ========================================================================== */
.sponsor-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 850px) {
  .sponsor-grid {
    grid-template-columns: 1fr;
  }
}

.sponsor-box {
  background: var(--bg-card);
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  padding: 2.8rem;
  backdrop-filter: var(--glass-blur);
  display: flex;
  flex-direction: column;
}

.sponsor-box h3 {
  font-size: 1.6rem;
  margin-bottom: 0.8rem;
  color: #fff;
}

.sponsor-box p.lead {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.bank-account-card {
  background: linear-gradient(135deg, rgba(62, 38, 28, 0.92), rgba(36, 22, 16, 0.98));
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.8rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
}

.bank-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.8rem;
}

.bank-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--gold-300);
}

.bank-number {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

.bank-holder {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  padding: 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(212, 165, 116, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-300);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-text h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.2rem;
}

.contact-text p, .contact-text a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.contact-text a:hover {
  color: var(--gold-300);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #180e0a;
  border-top: 1px solid var(--border-glass);
  padding: 4rem 0 2rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  position: relative;
  z-index: 10;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 550px) {
  .footer-top {
    grid-template-columns: 1fr;
  }
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.2rem;
}

.footer-col p {
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--gold-300);
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  background: var(--gold-400);
  color: #241610;
  transform: translateY(-3px);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Modals (도서 상세 모달 & 동역자 신청 모달)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(24, 14, 10, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.modal-backdrop.active {
  display: flex;
  opacity: 1;
}

.modal-dialog {
  background: #2e1c15;
  border: 1px solid var(--border-glass-gold);
  border-radius: var(--radius-xl);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), var(--shadow-gold);
  position: relative;
  transform: translateY(30px) scale(0.96);
  transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1);
}

.modal-backdrop.active .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  background: #fff;
  color: #000;
}

/* Book Detail Modal Interior */
.book-modal-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2.5rem;
  padding: 2.5rem;
}

@media (max-width: 680px) {
  .book-modal-content {
    grid-template-columns: 1fr;
    padding: 1.75rem;
  }
}

.book-modal-cover-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.book-modal-cover {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 1/1.45;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.7);
  margin-bottom: 1.2rem;
}

.book-modal-details h3 {
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 0.3rem;
}

.book-modal-author {
  font-size: 1rem;
  color: var(--gold-300);
  margin-bottom: 1.2rem;
  font-weight: 600;
}

.book-modal-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.book-modal-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Form Styling in Modal */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--wood-200);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--gold-400);
}

/* Toast Notification */
.toast-msg {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--gold-400);
  color: #241610;
  font-weight: 700;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  z-index: 3000;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  font-size: 0.92rem;
}

.toast-msg.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive Mobile Navigation */
@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: #281710;
    border-left: 1px solid var(--border-glass-gold);
    flex-direction: column;
    padding: 6rem 2rem 2rem;
    gap: 1.5rem;
    transition: right var(--transition-normal);
    box-shadow: -10px 0 30px rgba(0,0,0,0.8);
  }

  .nav-links.mobile-open {
    right: 0;
  }

  .mobile-menu-toggle {
    display: block;
    z-index: 1001;
  }
}