@charset "UTF-8";

/* ========================================
   CSS Variables & Theme
======================================== */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #16161f;
    --bg-card-hover: #1e1e2a;
    
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    --accent-glow: rgba(99, 102, 241, 0.3);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    
    /* Syntax Highlighting */
    --code-bg: #0d1117;
    --code-tag: #ff7b72;
    --code-attr: #79c0ff;
    --code-value: #a5d6ff;
    --code-comment: #8b949e;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Typography */
    --font-main: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* ========================================
   Reset & Base
======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ========================================
   Utility Classes
======================================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========================================
   Navigation
======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
}

.nav-item.has-dropdown {
    position: relative;
}

.nav-item .arrow {
    font-size: 0.7rem;
    margin-left: var(--space-xs);
    transition: transform var(--transition-fast);
}

.nav-item:hover .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 220px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.dropdown-menu li a:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.dropdown-menu li a.coming-soon {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 드롭다운 카테고리 스타일 */
.dropdown-category {
    padding: var(--space-sm) 0;
}

.dropdown-category:first-child {
    padding-top: 0;
}

.category-label {
    display: block;
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dropdown-category .sub-menu {
    margin-top: var(--space-xs);
}

.dropdown-category .sub-menu li a {
    padding-left: var(--space-lg);
    font-size: 0.9rem;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-sm) var(--space-md);
}

.dropdown-header {
    display: block;
    padding: var(--space-xs) var(--space-md);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    pointer-events: none;
}

/* 드롭다운 전체보기 링크 */
.dropdown-menu > li:last-child a,
.dropdown-menu > li:nth-last-child(2) a {
    font-weight: 500;
    color: var(--accent-primary);
}

.dropdown-menu > li:last-child a:hover,
.dropdown-menu > li:nth-last-child(2) a:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-secondary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* ========================================
   Hero Section
======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
    overflow: hidden;
}

.hero > .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3xl);
    z-index: 1;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(168, 85, 247, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title .line {
    display: block;
}

.hero-title .accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn-icon {
    transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.code-window {
    width: 100%;
    max-width: 450px;
    background: var(--code-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border-color);
}

.code-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca3f; }

.file-name {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.code-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-content .tag { color: var(--code-tag); }
.code-content .attr { color: var(--code-attr); }
.code-content .value { color: var(--code-value); }
.code-content .comment { color: var(--code-comment); }

/* 히어로 배지 */
.hero-badge {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
}

/* 히어로 자격증 카드 그리드 */
.hero-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    max-width: 400px;
    animation: floatCards 8s ease-in-out infinite;
}

@keyframes floatCards {
    0%, 100% { transform: translateY(0) rotate(2deg); }
    50% { transform: translateY(-15px) rotate(-2deg); }
}

.hero-cert-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.hero-cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.hero-cert-card.web::before {
    background: linear-gradient(90deg, #6366f1, #8b5cf6);
}

.hero-cert-card.programming::before {
    background: linear-gradient(90deg, #10b981, #34d399);
}

.hero-cert-card.graphics::before {
    background: linear-gradient(90deg, #a855f7, #ec4899);
}

.hero-cert-card.coming::before {
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.hero-cert-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hero-card-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.hero-card-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.hero-card-sub {
    font-size: 0.7rem;
    color: var(--text-tertiary);
}

/* ========================================
   Section Common
======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.1);
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Certificates Section
======================================== */
.certificates {
    padding: var(--space-3xl) 0;
    background: var(--bg-secondary);
}

/* 카테고리별 섹션 구분 */
.category-section {
    position: relative;
}

.category-section:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

/* 섹션 아이콘 */
.section-title .section-icon {
    display: inline-block;
    margin-right: var(--space-sm);
    font-size: 1.1em;
}

/* 섹션 링크 */
.section-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    color: var(--accent-primary);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.section-link:hover {
    color: var(--accent-secondary);
    gap: var(--space-sm);
}

/* 카테고리별 배경색 구분 */
.category-ged {
    background: var(--bg-primary);
}

.category-accounting {
    background: var(--bg-secondary);
}

.category-mockexam {
    background: var(--bg-primary);
}

/* 준비중 배지 */
.cert-badge.coming-soon {
    background: rgba(148, 163, 184, 0.2);
    color: var(--text-tertiary);
}

.cert-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-tertiary);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.cert-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.cert-card:not(.disabled):hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

.cert-card:not(.disabled):hover::before {
    opacity: 1;
}

.cert-card.featured {
    border-color: rgba(99, 102, 241, 0.3);
}

.cert-card.featured::before {
    opacity: 1;
}

.cert-card.disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.cert-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    background: var(--accent-gradient);
    color: white;
    border-radius: 20px;
}

.cert-badge.coming {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.cert-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.cert-desc {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
    flex: 1;
}

.cert-meta {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.meta-icon {
    font-size: 1rem;
}

.cert-action {
    font-weight: 600;
    color: var(--accent-primary);
    transition: color var(--transition-fast);
}

.cert-card:not(.disabled):hover .cert-action {
    color: var(--accent-secondary);
}

.cert-action.disabled {
    color: var(--text-tertiary);
}

/* 실기/필기 분리 버튼 */
.cert-actions-split {
    display: flex;
    gap: var(--space-sm);
    margin-top: auto;
}

.cert-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.cert-btn.practical {
    background: var(--accent-gradient);
    color: white;
}

.cert-btn.practical:hover:not(.disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.cert-btn.written {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.cert-btn.written:hover:not(.disabled) {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.cert-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cert-btn .btn-label {
    font-weight: 600;
}

.cert-btn .btn-arrow {
    transition: transform var(--transition-fast);
}

.cert-btn:hover:not(.disabled) .btn-arrow {
    transform: translateX(3px);
}

.cert-btn .btn-soon {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

/* ========================================
   Features Section
======================================== */
.features {
    padding: var(--space-3xl) 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   Footer
======================================== */
.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo-icon {
    font-size: 1.5rem;
}

.footer-brand .logo-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-brand p {
    margin-top: var(--space-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--space-3xl);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer-column ul li {
    margin-bottom: var(--space-sm);
}

.footer-column ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-column ul li a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* 소셜 미디어 링크 숨김 (SEO용) */
.social-links-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Responsive
======================================== */

/* 태블릿 (1024px 이하) */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--space-lg);
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2xl);
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: clamp(2rem, 6vw, 3.5rem);
    }
    
    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        justify-content: center;
    }
    
    .code-window {
        max-width: 100%;
    }
    
    .hero-cards {
        max-width: 350px;
        gap: var(--space-sm);
    }
    
    .hero-cert-card {
        padding: var(--space-md);
    }
    
    .hero-card-icon {
        font-size: 1.75rem;
    }
    
    .hero-card-title {
        font-size: 0.85rem;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* 모바일 (768px 이하) */
@media (max-width: 768px) {
    :root {
        --space-3xl: 3rem;
        --space-2xl: 2rem;
    }
    
    .container {
        padding: 0 var(--space-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: var(--bg-tertiary);
        margin-top: var(--space-sm);
        border-radius: var(--radius-md);
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-md);
    }
    
    .stat-item {
        min-width: 80px;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-md);
    }
    
    .hero-cards {
        max-width: 280px;
        gap: var(--space-xs);
    }
    
    .hero-cert-card {
        padding: var(--space-sm) var(--space-md);
    }
    
    .hero-card-icon {
        font-size: 1.5rem;
        margin-bottom: var(--space-xs);
    }
    
    .hero-card-title {
        font-size: 0.75rem;
    }
    
    .hero-card-sub {
        font-size: 0.65rem;
    }
    
    .cert-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .cert-card {
        padding: var(--space-lg);
    }
    
    .cert-title {
        font-size: 1.25rem;
    }
    
    .cert-actions-split {
        flex-direction: column;
    }
    
    .cert-btn {
        padding: var(--space-md) var(--space-lg);
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        margin-bottom: var(--space-xl);
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .footer-brand {
        max-width: 100%;
    }
}

/* 작은 모바일 (480px 이하) */
@media (max-width: 480px) {
    :root {
        --space-3xl: 2.5rem;
        --space-2xl: 1.5rem;
        --space-xl: 1.25rem;
    }
    
    .hero-badge {
        font-size: 0.7rem;
        padding: 6px 12px;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-cards {
        max-width: 240px;
    }
    
    .hero-cert-card {
        padding: var(--space-sm);
    }
    
    .hero-card-icon {
        font-size: 1.25rem;
    }
    
    .hero-card-title {
        font-size: 0.7rem;
    }
    
    .hero-card-sub {
        display: none;
    }
    
    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: 0.9rem;
    }
    
    .cert-icon {
        font-size: 2.5rem;
    }
    
    .cert-title {
        font-size: 1.1rem;
    }
    
    .cert-desc {
        font-size: 0.875rem;
    }
    
    .meta-item {
        font-size: 0.8rem;
    }
    
    .cert-meta {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }
    
    .code-window {
        font-size: 0.75rem;
    }
    
    .section-tag {
        font-size: 0.7rem;
    }
}