:root {
    --white: #ffffff;
    --black: #1a1a1a;
    --dark-green: #2d4f42; /* Deep eco green */
    --ice-blue: #e3f2fd;   /* Iceberg vibe */
    --light-gray: #f8f9fa;
    --text-color: #333333;
    --border-color: #e5e5e5;
    --max-width: 1280px;
    --nav-height: 80px;
}

[data-theme="dark"] {
    --white: #121212;
    --black: #ffffff;
    --dark-green: #81c784;
    --ice-blue: #1e3a5f;
    --light-gray: #1e1e1e;
    --text-color: #e0e0e0;
    --border-color: #333333;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--white);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .logo {
    font-family: 'Playfair Display', serif;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* HEADER */
.site-header {
    height: var(--nav-height);
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo a {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.logo .dot {
    color: var(--dark-green);
}

.main-nav ul {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.main-nav a {
    font-size: 1rem;
    font-weight: 500;
    position: relative;
}

.main-nav a.active::after,
.main-nav a:hover::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--dark-green);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-color);
}

.subscribe-btn {
    background-color: var(--black);
    color: var(--white);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.subscribe-btn:hover {
    transform: translateY(-2px);
    background-color: var(--dark-green);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* MAIN CONTENT */
main {
    max-width: var(--max-width);
    margin: 0 auto;
}

.page-section {
    display: none;
    animation: fadeIn 0.6s ease;
}

.page-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* HERO SECTION */
.hero-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 4rem 2rem;
    align-items: center;
    background: linear-gradient(135deg, var(--white) 0%, var(--ice-blue) 100%);
}

.hero-text .tag {
    background-color: var(--dark-green);
    color: white;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    display: inline-block;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    max-width: 90%;
}

.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    border-bottom: 2px solid var(--black);
    padding-bottom: 5px;
}

.hero-image {
    width: 100%;
    height: 500px;
    background-image: url('https://images.unsplash.com/photo-1542601906990-b4d3fb778b09?auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    border-radius: 20px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* TREND SUMMARY */
.trend-summary {
    padding: 4rem 2rem;
    border-top: 1px solid var(--border-color);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 { font-size: 2.5rem; }
.section-title p { color: #888; }

.trend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.trend-card {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: 12px;
    transition: transform 0.3s;
}

.trend-card:hover {
    transform: translateY(-5px);
    background-color: var(--white);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.trend-icon { font-size: 2rem; display: block; margin-bottom: 1rem; }
.trend-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.trend-card p { font-size: 0.9rem; color: #666; }

/* ARTICLE FEED */
.article-feed-container {
    padding: 2rem 2rem 6rem;
}

.feed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-tags span {
    margin-left: 1rem;
    cursor: pointer;
    font-weight: 500;
    color: #888;
}

.filter-tags span.active {
    color: var(--dark-green);
    font-weight: 700;
    border-bottom: 2px solid var(--dark-green);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 3rem;
}

.article-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.article-meta {
    font-size: 0.8rem;
    color: #999;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: block;
}

.article-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
}

.load-more {
    text-align: center;
    margin-top: 4rem;
}

.load-more button {
    background: none;
    border: 1px solid var(--border-color);
    padding: 1rem 3rem;
    font-family: 'Playfair Display', serif;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.load-more button:hover {
    background-color: var(--black);
    color: var(--white);
}

/* ANALYSIS PAGE */
.page-header {
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--light-gray);
    margin-bottom: 3rem;
}

.analysis-layout {
    padding: 0 2rem 4rem;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.main-analysis img {
    width: 100%;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.category {
    color: var(--dark-green);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.analysis-content h2 {
    font-size: 2.5rem;
    margin: 1rem 0;
}

.summary {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #555;
    border-left: 4px solid var(--dark-green);
    padding-left: 1.5rem;
    margin-bottom: 2rem;
}

.data-points {
    display: flex;
    justify-content: space-between;
    background-color: var(--black);
    color: var(--white);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.data-item {
    text-align: center;
}

.data-item .number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark-green); /* Use lighter green for contrast if needed, but brand logic */
    color: #81c784;
}

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

.report-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    transition: transform 0.3s;
}

.report-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.report-cover {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 900;
    color: white;
    font-family: 'Playfair Display', serif;
    text-align: center;
    line-height: 1;
}

.report-cover.red { background-color: #e57373; }
.report-cover.green { background-color: #81c784; }
.report-cover.blue { background-color: #64b5f6; }

.report-info { padding: 1.5rem; }
.download-btn {
    width: 100%;
    margin-top: 1rem;
    padding: 0.8rem;
    background-color: var(--light-gray);
    border: none;
    cursor: pointer;
    font-weight: 600;
}

/* SHOP */
.product-grid {
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    position: relative;
}

.product-img {
    height: 300px;
    overflow: hidden;
    position: relative;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.product-card:hover .product-img img {
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.4rem 1rem;
    color: white;
    font-size: 0.8rem;
    font-weight: bold;
    text-transform: uppercase;
}

.partner-badge { background-color: #333; }
.own-badge { background-color: var(--dark-green); }

.product-info {
    padding: 1.5rem 0;
    text-align: center;
}

.price {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.buy-btn {
    padding: 0.8rem 2rem;
    background-color: var(--black);
    color: white;
    border: none;
    cursor: pointer;
}

.buy-btn.disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.coming-soon-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; height: 300px;
    background: rgba(255,255,255,0.7);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* BRAND STORY */
.brand-story {
    padding: 6rem 2rem;
    text-align: center;
    background-color: #f4f8f6; /* Very light green hint */
}

.story-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-content h1 {
    font-size: 3rem;
    margin-bottom: 2rem;
}

.story-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: #555;
}

.campaign-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid #ddd;
}

.stat strong {
    display: block;
    font-size: 2.5rem;
    color: var(--dark-green);
    font-family: 'Playfair Display', serif;
}

/* ADSENSE PLACEHOLDER STYLES */
.ad-container {
    margin: 2rem auto;
    max-width: var(--max-width);
    text-align: center;
    background: #fafafa;
    padding: 10px;
    min-height: 100px;
}

.ad-label {
    display: block;
    font-size: 0.7rem;
    color: #ccc;
    margin-bottom: 5px;
    text-transform: uppercase;
}

.sidebar-ad {
    display: none; /* Hide on mobile */
}

@media (min-width: 1024px) {
    .sidebar-ad { display: block; }
}

/* FOOTER */
.site-footer {
    background-color: #111;
    color: #fff;
    padding: 4rem 2rem 2rem;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
}

.footer-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.footer-col h4 {
    margin-bottom: 1.5rem;
    color: #888;
}

.footer-col a {
    display: block;
    margin-bottom: 0.8rem;
    color: #ccc;
}

.newsletter-form {
    display: flex;
    border-bottom: 1px solid #555;
    padding-bottom: 0.5rem;
}

.newsletter-form input {
    background: none;
    border: none;
    color: white;
    flex-grow: 1;
}

.newsletter-form button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

.footer-bottom {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #333;
    font-size: 0.8rem;
    color: #555;
}

@media (max-width: 768px) {
    .hero-section { grid-template-columns: 1fr; padding: 2rem 1rem; }
    .hero-image { height: 300px; }
    .hero-text h1 { font-size: 2.2rem; }
    .analysis-layout { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
    .main-nav { display: none; }
    .mobile-menu-btn { display: block; }
}