:root {
    /* Naver-inspired Dark Mode Color Palette */
    --primary-blue: #20E800;
    /* Lime Accent */
    --primary-dark: #19B900;
    --accent-green: #20E800;
    /* Lime Accent */
    --text-main: #FFFFFF;
    --text-sub: #D6D6D7;
    --bg-light: #0A0A0B;
    /* Near Black Background */
    --white: #1A1A1C;
    /* Card Background (Medium Dark Gray) */
    --border-color: #333333;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Border Radius */
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-full: 9999px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

body {
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

ul {
    list-style: none;
}

/* Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-padding {
    padding: var(--spacing-xl) 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: #0A0A0B;
    /* Dark text on lime button */
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(32, 232, 0, 0.2);
}

.btn-outline {
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-sub);
    font-size: 0.9rem;
    padding: 8px 16px;
}

.btn-outline:hover {
    border-color: var(--primary-blue);
    color: #0A0A0B;
    background-color: var(--primary-blue);
}

.btn-light {
    background-color: var(--white);
    color: var(--primary-blue);
}

.btn-light:hover {
    background-color: #242628;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Header */
.site-header {
    height: 60px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background-color: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(8px);
    z-index: 100;
    border-bottom: 1px solid #242628;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Screenshot Gallery */
.screenshot-section {
    background-color: var(--bg-light);
    overflow: hidden;
}

.screenshot-gallery {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding: 0 20px 20px 20px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* Firefox */
}

.screenshot-gallery::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari */
}

.screenshot-item {
    flex: 0 0 260px;
    /* Width of a phone screenshot */
    height: 560px;
    /* Aspect ratio roughly 9:19.5 */
    /* Remove device frame styling to support feature graphics */
    /* background-color: var(--white); */
    /* border-radius: 24px; */
    /* border: 4px solid var(--border-color); */
    scroll-snap-align: center;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    /* box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1); */
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    /* Dim placeholder */
}

/* Review Card Styles */
.review-card {
    flex: 0 0 280px;
    background-color: var(--white);
    border-radius: 16px;
    padding: 24px;
    scroll-snap-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    /* Softer shadow */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: auto;
    min-height: 200px;
    border: 1px solid var(--border-color);
}

.review-header {
    margin-bottom: 12px;
}

.stars {
    color: #FFC107;
    /* Star Color */
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.review-text {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-main);
    margin-bottom: 16px;
    flex-grow: 1;
    word-break: keep-all;
    /* Korean word break */
}

.review-meta {
    font-size: 0.85rem;
    color: var(--text-sub);
    text-align: right;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--white);
    /* White in dark mode if text, but it's an image now */
}

/* Hero Section */
.hero {
    position: relative;
    padding: 80px 0 100px;
    overflow: hidden;
    background-color: var(--bg-light);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Dark overlay on hero image for better text contrast - more opaque */
    background: linear-gradient(to bottom, rgba(10, 10, 11, 0.9), var(--bg-light));
    z-index: 0;
    filter: blur(10px);
    /* Blur effect as requested */
    transform: scale(1.1);
    /* Prevent blurred edges from showing */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background: rgba(0, 0, 0, 0.6);
    /* Additional darkening layer */
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 600px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(32, 232, 0, 0.1);
    color: var(--primary-blue);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.hero h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-main);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    /* Text shadow for legibility */
}

.hero-desc {
    color: var(--text-sub);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    /* Text shadow for legibility */
}

/* Showcase Grid */
.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--text-sub);
}

.app-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.app-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    /* For stretched link */
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: none;
    border-color: var(--primary-blue);
}

.app-icon {
    width: 80px;
    height: 80px;
    border-radius: 22px;
    margin-bottom: 20px;
    background-color: #242628;
    /* Darker bg */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary-blue);
    overflow: hidden;
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-tag {
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: block;
}

.app-info h3 {
    font-size: 1.25rem;
    margin-bottom: 8px;
}

.app-info p {
    color: var(--text-sub);
    font-size: 0.95rem;
    margin-bottom: 24px;
    word-break: keep-all;
}

.app-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
    /* Make buttons clickable above stretched link */
}

.stretched-link::after {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    content: "";
}



/* Bottom CTA */
.bottom-cta {
    background: var(--bg-light);
    color: var(--text-main);
    text-align: center;
    border-top: 1px solid var(--border-color);
    /* Add border for separation */
}

.bottom-cta h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.bottom-cta p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
footer {
    padding: 32px 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-light);
    text-align: center;
    /* Center everything */
}



footer p {
    color: #9CA3AF;
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Responsive */
@media (min-width: 768px) {
    .hero h1 {
        font-size: 3.5rem;
    }

    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .proof-box {
        flex-direction: row;
        text-align: left;
        padding: 60px;
    }

    .proof-content {
        flex: 1;
        align-items: flex-start;
    }
}

@media (min-width: 1024px) {
    .app-grid {
        gap: 32px;
    }
}