:root {
    /* Bright Green "Vivid Forest" Theme */
    --primary: #4caf50;
    --primary-light: #2e7d32;
    /* Used for highlights and active text, needs to be darker on light bg */
    --secondary: #f57c00;
    /* More saturated orange for contrast */
    --bg-dark: #f0fdf4;
    /* Bright and light mint-green background */
    --bg-card: rgba(255, 255, 255, 0.85);
    /* Bright white translucent cards */
    --text-main: #0a1f10;
    /* Very dark green (almost black) for sharp text */
    --text-muted: #4e6e58;
    /* Muted greenish-grey for secondary text */
    --glass-border: rgba(76, 175, 80, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(76, 175, 80, 0.15);
    /* Softer shadow */
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Effects */
.glass-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    backdrop-filter: blur(80px);
    -webkit-backdrop-filter: blur(80px);
    z-index: -1;
    pointer-events: none;
}

.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    z-index: -2;
    animation: drift 20s infinite alternate;
}

.orb-1 {
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.4) 0%, transparent 70%);
    top: -20%;
    left: -10%;
}

.orb-2 {
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(255, 179, 0, 0.2) 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: -5s;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) scale(1);
    }

    100% {
        transform: translate(5%, 10%) scale(1.1);
    }
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(240, 253, 244, 0.85);
    /* Light blurred header */
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: #ffffff;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    /* 글씨가 더 잘 보이도록 그림자 추가 */
}

.highlight {
    color: var(--secondary);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: #ffffff;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-light);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

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

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 8rem 2rem 4rem;
}

.section {
    margin-bottom: 8rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s forwards;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding-bottom: 4rem;
}

.agency-tags {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.tag {
    background: rgba(76, 175, 80, 0.1);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-light);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
    color: var(--text-main);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 50%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

.hero-action {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background: rgba(76, 175, 80, 0.05);
    border-color: var(--primary-light);
}

/* Statistics Grid */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-light);
}

.stat-icon {
    font-size: 2.5rem;
    background: rgba(76, 175, 80, 0.1);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-info strong {
    display: block;
    font-size: 1.1rem;
    color: var(--primary-light);
    margin-bottom: 0.2rem;
}

.stat-info span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Headers */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-main);
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.topic-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
    text-align: center;
}

.topic-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(76, 175, 80, 0.2);
    background: rgba(255, 255, 255, 1);
    border-color: var(--primary-light);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.topic-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary-light);
    line-height: 1.4;
}

.topic-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255, 255, 255, 0.1);
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: -2.45rem;
    top: 0.2rem;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--text-muted);
    transition: all 0.3s;
}

.timeline-item.active .timeline-dot {
    border-color: var(--secondary);
    background: var(--secondary);
    box-shadow: 0 0 15px rgba(255, 179, 0, 0.5);
}

.timeline-date {
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
    transition: transform 0.2s;
}

.timeline-content:hover {
    transform: scale(1.02);
    border-color: var(--primary-light);
}

.timeline-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.note {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 2rem;
}

.mt-2 {
    margin-top: 1rem;
}

/* Details Grid */
.details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.detail-box {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
    text-align: center;
}

.detail-box.full-width {
    grid-column: 1 / -1;
}

.detail-box h3 {
    font-size: 1.4rem;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.check-list {
    list-style: none;
    text-align: left;
}

.check-list li {
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
    color: var(--text-muted);
}

.check-list li strong {
    color: var(--text-main);
    display: block;
    margin-bottom: 0.2rem;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--secondary);
    font-weight: bold;
    font-size: 1.2rem;
}

/* 하위 리스트(ul)에서는 주황색 체크 표시 제거 */
.check-list ul li {
    padding-left: 0;
}

.check-list ul li::before {
    content: none;
}

/* Footer */
footer {
    background: rgba(76, 175, 80, 0.05);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 2rem;
    text-align: center;
}

.footer-cta {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-main);
    line-height: 1.4;
}

.footer-info h4 {
    color: var(--primary-light);
    margin-bottom: 1rem;
}

.footer-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

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

/* Responsive */
@media (max-width: 900px) {

    .cards-grid,
    .hero-stats {
        grid-template-columns: 1fr;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .details-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }
}