@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.min.css');

:root {
    --color-primary: #1a4b6e;
    --color-primary-light: #2a6d9e;
    --color-primary-dark: #0f2d44;
    --color-accent: #3a8fc2;
    --color-accent-hover: #2d7aad;
    --color-bg: #ffffff;
    --color-bg-warm: #f8f9fb;
    --color-bg-section: #f1f4f8;
    --color-text: #1e293b;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-card-shadow: rgba(15, 45, 68, 0.06);
    --color-card-hover-shadow: rgba(15, 45, 68, 0.12);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;
    --spacing-5xl: 128px;
    --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-serif: 'Noto Serif KR', Georgia, serif;
    --shadow-sm: 0 1px 3px var(--color-card-shadow);
    --shadow-md: 0 4px 16px var(--color-card-shadow);
    --shadow-lg: 0 8px 32px var(--color-card-shadow);
    --shadow-hover: 0 8px 32px var(--color-card-hover-shadow);
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --max-content: 1200px;
    --max-text: 780px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-accent-hover); }

.bvg-container {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ====== HEADER ====== */
.bvg-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-base);
}
.bvg-header.scrolled { box-shadow: var(--shadow-sm); }
.bvg-header-inner {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.bvg-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.bvg-logo-image { width: 36px; height: 36px; object-fit: contain; border-radius: var(--radius-sm); }
.bvg-logo-text {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}
.bvg-nav { display: flex; align-items: center; gap: var(--spacing-xl); }
.bvg-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    padding: var(--spacing-xs) 0;
    position: relative;
}
.bvg-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}
.bvg-nav a:hover { color: var(--color-primary); }
.bvg-nav a:hover::after { width: 100%; }

.bvg-mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}
.bvg-mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    margin: 5px 0;
    transition: var(--transition-base);
    border-radius: 1px;
}

/* ====== HERO ====== */
.bvg-hero {
    position: relative;
    overflow: hidden;
    min-height: 520px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
}
.bvg-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.2;
}
.bvg-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,45,68,0.85) 0%, rgba(26,75,110,0.7) 100%);
}
.bvg-hero-content {
    position: relative;
    z-index: 2;
    max-width: var(--max-content);
    margin: 0 auto;
    padding: var(--spacing-5xl) var(--spacing-lg);
    color: #fff;
}
.bvg-hero h1 {
    font-family: var(--font-sans);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}
.bvg-hero-sub {
    font-size: clamp(1rem, 2vw, 1.15rem);
    line-height: 1.8;
    opacity: 0.9;
    max-width: 600px;
    margin-bottom: var(--spacing-xl);
}
.bvg-hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-accent);
    color: #fff;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    text-decoration: none;
}
.bvg-hero-cta:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(58,143,194,0.3);
    color: #fff;
}

/* ====== SECTIONS ====== */
.bvg-section {
    padding: var(--spacing-4xl) 0;
}
.bvg-section-alt {
    background: var(--color-bg-warm);
}
.bvg-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--color-primary-dark);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    text-align: center;
}
.bvg-section-desc {
    color: var(--color-text-secondary);
    font-size: 1rem;
    text-align: center;
    max-width: 560px;
    margin: 0 auto var(--spacing-3xl);
    line-height: 1.7;
}

/* ====== CARD GRID ====== */
.bvg-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
}
.bvg-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    border: 1px solid var(--color-border-light);
}
.bvg-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.bvg-card-img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
    border-bottom: 1px solid var(--color-border-light);
}
.bvg-card-body { padding: var(--spacing-lg); }
.bvg-card-cat {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent);
    background: rgba(58,143,194,0.08);
    padding: 3px 10px;
    border-radius: 20px;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.02em;
}
.bvg-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.45;
    letter-spacing: -0.01em;
}
.bvg-card-excerpt {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.bvg-card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: gap var(--transition-fast);
}
.bvg-card-link:hover { gap: 8px; }

/* ====== CAROUSEL ====== */
.bvg-carousel {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: var(--spacing-sm) 0 var(--spacing-lg);
    scrollbar-width: none;
}
.bvg-carousel::-webkit-scrollbar { display: none; }
.bvg-carousel .bvg-card {
    flex: 0 0 340px;
    scroll-snap-align: start;
}

/* ====== FEATURES ====== */
.bvg-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-xl);
}
.bvg-feature {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}
.bvg-feature-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.bvg-feature-icon svg { width: 28px; height: 28px; stroke: #fff; fill: none; stroke-width: 1.5; }
.bvg-feature h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-dark);
}
.bvg-feature p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ====== FOOTER ====== */
.bvg-footer {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.7);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}
.bvg-footer-inner {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}
.bvg-footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.bvg-footer-brand { max-width: 320px; }
.bvg-footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--spacing-sm);
    color: #fff;
    text-decoration: none;
}
.bvg-footer-logo-image {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}
.bvg-footer-brand-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
}
.bvg-footer-brand p { font-size: 0.85rem; line-height: 1.7; }
.bvg-footer-links h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.03em;
}
.bvg-footer-links ul { list-style: none; }
.bvg-footer-links li { margin-bottom: var(--spacing-sm); }
.bvg-footer-links a {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
    transition: color var(--transition-fast);
}
.bvg-footer-links a:hover { color: #fff; }
.bvg-footer-bottom {
    padding-top: var(--spacing-xl);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
}
.bvg-footer-copy {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    line-height: 1.7;
}
.bvg-footer-notice {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.35);
    line-height: 1.7;
    max-width: 700px;
}

/* ====== SCROLL ANIMATION ====== */
.bvg-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.bvg-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ====== RESPONSIVE ====== */
@media (max-width: 768px) {
    .bvg-header-inner { height: 56px; }
    .bvg-logo-image, .bvg-footer-logo-image { width: 32px; height: 32px; }
    .bvg-nav { display: none; }
    .bvg-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 56px;
        left: 0;
        right: 0;
        background: #fff;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        gap: var(--spacing-md);
        z-index: 99;
    }
    .bvg-mobile-toggle { display: block; }
    .bvg-hero { min-height: 400px; }
    .bvg-hero-content { padding: var(--spacing-3xl) var(--spacing-lg); }
    .bvg-section { padding: var(--spacing-3xl) 0; }
    .bvg-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
    .bvg-carousel .bvg-card { flex: 0 0 300px; }
    .bvg-footer-top { flex-direction: column; gap: var(--spacing-xl); }
    .bvg-footer-bottom { flex-direction: column; }
    .bvg-card-img { aspect-ratio: 16/9; }
}

@media (max-width: 480px) {
    :root { --spacing-lg: 16px; }
    .bvg-hero h1 { font-size: 1.75rem; }
    .bvg-carousel .bvg-card { flex: 0 0 280px; }
}