:root {
    /* App Theme Colors */
    --primary-color: #1e3a2f;
    --primary-hover: #142820;
    --text-main: #0f172a;
    --text-sub: #64748b;
    --bg-gradient-start: #f8fafc;
    --bg-gradient-end: #e2e8f0;
    --card-bg: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.6);
}

html {
    height: 100%;
    background: url('/images/hero-3d-illustration.png') no-repeat 85% center fixed;
    background-size: cover;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: transparent;
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100%;
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 140px 2rem 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    position: relative;
}

/* Hero Section */
.hero-section {
    /* Animation */
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;

    /* Layout */
    max-width: 600px;
    width: 100%;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #5a7368;
    /* Lighter primary color */
    letter-spacing: -0.02em;
}

.brand-name {
    font-family: 'Lobster', cursive;
    font-weight: 400;
    font-size: 4.5rem;
    display: block;
    color: var(--primary-color);
    margin-top: 0.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #5a7368;
    /* Lighter primary color */
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: 0;
    margin-right: 0;
    line-height: 1.6;
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: 1.25rem 3.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px -5px rgba(45, 74, 63, 0.4);
    position: relative;
    overflow: hidden;
}

.cta-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 20px 30px -10px rgba(45, 74, 63, 0.5);
}

.cta-button:active {
    transform: translateY(0);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 5rem;
    width: 100%;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
    border-radius: 16px;
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

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

.feature-icon-wrapper {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(45, 74, 63, 0.08);
    border-radius: 12px;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
}

.feature-desc {
    color: var(--text-sub);
    line-height: 1.5;
    font-size: 0.95rem;
    margin: 0;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .landing-container {
        padding: 2rem 1.5rem;
    }

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