:root {
    --primary-color: #6a7458; /* Muted olive green */
    --secondary-color: #d8bea5; /* Sand beige */
    --bg-color: #fcfbf9; /* Warm off-white */
    --text-main: #3d3935; /* Charcoal brown */
    --text-muted: #726b64;
    --white: #ffffff;
    --accent: #8c6239; /* Warm brown */
    
    --font-heading: 'Noto Serif KR', serif;
    --font-body: 'Gowun Dodum', sans-serif;
    
    --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: var(--font-body);
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 70px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.3;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

.section {
    padding: 100px 0;
}

/* Scroll Animation Base */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.215, 0.61, 0.355, 1), transform 1s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transform: scale(1.05);
    transition: transform 10s ease-out;
    z-index: -2;
}

.hero:hover .hero-bg {
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(40,35,30,0.4), rgba(40,35,30,0.7));
    z-index: -1;
}

.hero-content {
    padding: 2rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    text-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: 300;
    letter-spacing: 2px;
    opacity: 0.9;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255,255,255,0.6);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    animation: scroll 2s infinite cubic-bezier(0.15, 0.41, 0.69, 0.94);
}

@keyframes scroll {
    0% { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, 15px); }
}

/* Flex Layouts */
.flex-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.flex-container-alt {
    display: flex;
    gap: 4rem;
}

@media (max-width: 900px) {
    .flex-container, .flex-container-alt {
        flex-direction: column;
    }
}

/* Intro Section */
.intro-text {
    flex: 1;
}

.intro-text h2 {
    font-size: 2.2rem;
    margin-bottom: 2rem;
    color: var(--text-main);
}

.intro-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.intro-text strong {
    color: var(--accent);
    font-weight: 500;
}

.intro-image {
    flex: 1;
    position: relative;
}

.intro-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    position: relative;
    z-index: 2;
}

.image-deco {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--secondary-color);
    border-radius: 12px;
    z-index: 1;
}

/* Core Section */
.core-section {
    background-color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(106, 116, 88, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.summary-text {
    font-size: 1.3rem;
    color: var(--text-muted);
}

.summary-text strong {
    color: var(--accent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature-card {
    background: var(--bg-color);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.03);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.05);
    background: var(--white);
    border-color: var(--secondary-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 1rem;
}

.mugwort-image-container {
    text-align: center;
    margin-top: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.mugwort-img {
    width: 100%;
    display: block;
    height: auto;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.mugwort-image-container:hover .mugwort-img {
    transform: scale(1.03);
}

/* Effects Section */
.effects-section {
    position: relative;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 120px 0;
}

.effects-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: radial-gradient(circle at center, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.effects-section .section-header h2 {
    color: var(--white);
}

.accordion-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.accordion-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 1rem;
    padding: 2rem;
    transition: var(--transition);
}

.accordion-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(10px);
}

.accordion-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.accordion-header .number {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-right: 1.5rem;
    font-weight: 600;
}

.accordion-header h3 {
    font-size: 1.4rem;
    color: var(--white);
    margin: 0;
}

.accordion-body p {
    color: rgba(255, 255, 255, 0.8);
    padding-left: 3rem;
    font-size: 1.05rem;
}

@media (max-width: 600px) {
    .accordion-body p {
        padding-left: 0;
        margin-top: 1rem;
    }
    .accordion-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .accordion-header .number {
        margin-bottom: 0.5rem;
    }
}

/* Target & Flow */
.target-box {
    flex: 1;
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.target-box h2 {
    margin-bottom: 2rem;
    font-size: 1.8rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 1rem;
    display: inline-block;
}

.check-list {
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: 1.2rem;
    font-size: 1.1rem;
    color: var(--text-main);
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--white);
    background: var(--accent);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.flow-box {
    flex: 1;
    padding: 3rem 1rem;
}

.flow-box h2 {
    margin-bottom: 2.5rem;
    font-size: 1.8rem;
}

.flow-steps {
    position: relative;
}

.flow-steps::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 10px;
    bottom: 20px;
    width: 2px;
    background: var(--secondary-color);
    opacity: 0.5;
}

.step {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 2rem;
}

.step-dot {
    position: absolute;
    left: 0;
    top: 5px;
    width: 24px;
    height: 24px;
    background: var(--bg-color);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    z-index: 2;
    transition: var(--transition);
}

.step:hover .step-dot {
    background: var(--primary-color);
    box-shadow: 0 0 10px rgba(106, 116, 88, 0.4);
}

.step p {
    font-size: 1.15rem;
    font-weight: 500;
    padding-top: 2px;
}

/* Final Image Overlay Section */
.final-img-container {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    height: 500px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.15);
}

.final-img-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.final-text-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.2) 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 4rem;
    color: var(--white);
}

.final-text-overlay h3 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.final-text-overlay p {
    font-size: 1.2rem;
    max-width: 500px;
    opacity: 0.9;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .final-text-overlay {
        padding: 2rem;
        background: rgba(0,0,0,0.5);
    }
    .final-text-overlay h3 { font-size: 1.8rem; }
}

/* Footer */
.footer {
    text-align: center;
    padding: 3rem 0;
    background: var(--text-main);
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

/* Navbar from main page */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(252, 251, 249, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-leaf { font-size: 1.2rem; }

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

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.3s;
}

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

@media (max-width: 900px) {
    .nav-links { display: none; }
}