/* Showcase Pages Common Styles - Enhanced & Refined */
:root {
    --primary-green: #1B5E20;
    --primary-light: #4CAF50;
    --primary-lighter: #81C784;
    --accent-green: #66BB6A;
    --dark-green: #0D3D12;
    --surface-bg: #F1F8F4;
    --card-bg: #FFFFFF;
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-muted: #757575;
    --border-color: #E0E0E0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --gradient-primary: linear-gradient(135deg, #1B5E20 0%, #2E7D32 100%);
    --gradient-accent: linear-gradient(135deg, #66BB6A 0%, #4CAF50 100%);
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    line-height: 1.7;
    background: var(--surface-bg);
    overflow-x: hidden;
}

.serif { font-family: 'Noto Serif KR', serif; }
.inter { font-family: 'Inter', sans-serif; }

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all 0.3s ease;
}

header.scrolled { box-shadow: var(--shadow-md); }

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.logo svg { width: 32px; height: 32px; }

.logo h1 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-green);
    letter-spacing: -0.02em;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.back-link:hover { color: var(--primary-green); }

.hero-showcase {
    margin-top: 70px;
    padding: 4rem 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.hero-showcase-content {
    text-align: center;
    margin-bottom: 3rem;
}

.showcase-badge {
    display: inline-block;
    background: var(--gradient-accent);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero-showcase h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.hero-showcase-image {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-showcase-image img {
    width: 100%;
    height: auto;
    display: block;
}

.content-section {
    padding: 4rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto 3rem;
    text-align: center;
    line-height: 1.8;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.info-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.card-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-accent);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 28px;
}

.card-number {
    display: inline-flex;
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.info-card p, .info-card li {
    color: var(--text-secondary);
    line-height: 1.7;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-green);
    font-weight: 700;
}

.info-table {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

.info-table table {
    width: 100%;
    border-collapse: collapse;
}

.info-table th {
    background: var(--gradient-primary);
    color: white;
    padding: 1.5rem;
    text-align: left;
    font-weight: 600;
}

.info-table td {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.info-table tr:last-child td { border-bottom: none; }
.info-table tbody tr:hover { background: var(--surface-bg); }

.zone-layout {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.zone-diagram {
    background: var(--surface-bg);
    padding: 2rem;
    border-radius: 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    overflow-x: auto;
    color: var(--text-primary);
    border: 2px dashed var(--border-color);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-item {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

.product-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.product-info {
    padding: 1.5rem;
}

.product-info h4 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.benefit-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 32px;
}

.benefit-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.esg-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.esg-badge {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: all 0.4s ease;
}

.esg-badge:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.esg-badge.environment { border-color: #4CAF50; }
.esg-badge.social { border-color: #2196F3; }
.esg-badge.governance { border-color: #FF9800; }

.esg-letter {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.esg-badge.environment .esg-letter {
    background: linear-gradient(135deg, #4CAF50, #66BB6A);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.esg-badge.social .esg-letter {
    background: linear-gradient(135deg, #2196F3, #42A5F5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.esg-badge.governance .esg-letter {
    background: linear-gradient(135deg, #FF9800, #FFB74D);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-section {
    background: var(--gradient-primary);
    color: white;
    padding: 5rem 3rem;
    border-radius: 32px;
    text-align: center;
    margin: 4rem 0;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: white;
    color: var(--primary-green);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 2rem 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-lighter);
}

.copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    z-index: 999;
}

.scroll-top:hover { transform: translateY(-5px); }
.scroll-top.visible { display: flex; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

@media (max-width: 1024px) {
    .esg-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    nav { padding: 1rem; }
    .logo h1 { font-size: 0.95rem; }
    .hero-showcase, .content-section { padding: 3rem 1.5rem; }
    .cards-grid, .benefits-grid, .product-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .zone-layout { padding: 1.5rem; }
    .zone-diagram { font-size: 0.75rem; padding: 1rem; }
    .cta-section { padding: 3rem 1.5rem; border-radius: 24px; }
    .cta-section h2 { font-size: 1.8rem; }
    .scroll-top { bottom: 1rem; right: 1rem; width: 45px; height: 45px; }
    .info-table th, .info-table td { padding: 1rem; font-size: 0.9rem; }
}

@media (max-width: 480px) {
    .hero-showcase h1 { font-size: 2rem; }
    .subtitle { font-size: 1rem; }
    .section-title { font-size: 1.75rem; }
    .esg-letter { font-size: 3rem; }
}