/* TAS.KRDS 페이지 스타일 */

/* CSS Variables */
:root {
    --primary: #00D4FF;
    --secondary: #00FF88;
    --accent: #FF6B35;
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border: #E2E8F0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --krds-blue: #0066CC;
    --krds-green: #00A651;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    color: var(--text-primary);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.logo-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.logo-main {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.logo-sub {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1000;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    padding-top: 100px;
    overflow-y: auto;
}

.mobile-menu.active {
    display: block;
}

/* 디버깅용: 모바일 메뉴가 보이도록 강제 표시 */
.mobile-menu.debug {
    display: block !important;
    background: rgba(255, 0, 0, 0.1) !important;
    border: 2px solid red !important;
}

/* 모바일 메뉴 내부 스타일 강화 */
.mobile-menu .nav-links {
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
}

.mobile-menu .nav-links a {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 1rem 2rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: block;
    width: 100%;
    text-align: center;
}

.mobile-menu .nav-links a:hover {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 2rem 2rem;
    background: linear-gradient(135deg, var(--background) 0%, #E0F2FE 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23E2E8F0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.badge-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--krds-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge-version {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--krds-green);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    color: white;
}

.cta-button.secondary {
    background: transparent;
    color: var(--krds-blue);
    border: 2px solid var(--krds-blue);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.cta-button.primary:hover {
    background: linear-gradient(135deg, var(--krds-green), var(--krds-blue));
}

.cta-button.secondary:hover {
    background: var(--krds-blue);
    color: white;
}

/* KRDS Preview */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.krds-preview {
    background: var(--surface);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
}

.preview-header {
    background: var(--krds-blue);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.preview-dots {
    display: flex;
    gap: 0.5rem;
}

.preview-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
}

.preview-title {
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
}

.preview-content {
    padding: 2rem;
}

.preview-nav {
    display: flex;
    justify-content: space-around;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.preview-nav i {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.preview-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.preview-card {
    background: var(--background);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border);
}

.preview-card i {
    font-size: 2rem;
    color: var(--krds-green);
    margin-bottom: 0.5rem;
    display: block;
}

.preview-card span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.section {
    margin-bottom: 6rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    border-radius: 2px;
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--krds-blue);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.feature-card ul {
    list-style: none;
    text-align: left;
}

.feature-card li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.feature-card li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--krds-blue);
    font-weight: bold;
}

/* Components Section */
.components-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.component-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

.component-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.component-item {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.component-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: var(--krds-green);
}

.component-item i {
    font-size: 1.5rem;
    color: var(--krds-green);
    margin-bottom: 0.5rem;
    display: block;
}

.component-item span {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Download Section */
.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.download-info h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.download-info p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.download-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.detail-item i {
    font-size: 1.2rem;
    color: var(--krds-blue);
    width: 20px;
}

.detail-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.download-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.download-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
}

.download-button.primary {
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    color: white;
    box-shadow: var(--shadow);
}

.download-button.secondary {
    background: transparent;
    color: var(--krds-blue);
    border: 2px solid var(--krds-blue);
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.download-button.primary:hover {
    background: linear-gradient(135deg, var(--krds-green), var(--krds-blue));
}

.download-button.secondary:hover {
    background: var(--krds-blue);
    color: white;
}

.download-info {
    width: 100%;
    text-align: center;
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.download-info p {
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

.download-info a {
    color: var(--krds-blue);
    text-decoration: none;
    font-weight: 500;
}

.download-info a:hover {
    text-decoration: underline;
}

/* Installation Section */
.installation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.installation-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--krds-blue), var(--krds-green));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.5;
}

.step-content code {
    background: var(--background);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    color: var(--krds-blue);
}

.code-example h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.code-block {
    background: #1E293B;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    background: #334155;
    padding: 1rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

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

.code-dot.red { background: #EF4444; }
.code-dot.yellow { background: #F59E0B; }
.code-dot.green { background: #10B981; }

.code-content {
    padding: 1.5rem;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-line {
    display: block;
    margin-bottom: 0.5rem;
}

.code-comment {
    color: #6B7280;
}

.code-keyword {
    color: #F59E0B;
    font-weight: 600;
}

.code-function {
    color: #60A5FA;
    font-weight: 600;
}

.code-string {
    color: #F87171;
}

/* Support Section */
.support-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.support-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border);
}

.support-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--krds-green);
}

.support-card i {
    font-size: 2.5rem;
    color: var(--krds-green);
    margin-bottom: 1rem;
}

.support-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.support-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.support-link {
    display: inline-block;
    color: var(--krds-blue);
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border: 2px solid var(--krds-blue);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.support-link:hover {
    background: var(--krds-blue);
    color: white;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 3rem 0 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.footer-logo {
    margin-bottom: 2rem;
}

.footer-logo-main {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.footer-logo-sub {
    font-size: 0.9rem;
    color: #94A3B8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: #94A3B8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-copyright {
    color: #64748B;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .download-content,
    .installation-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .nav-links {
        display: none; /* 데스크톱용 nav-links 숨김 */
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    /* 모바일 메뉴가 활성화되었을 때 내부 nav-links는 보이도록 오버라이드 */
    .mobile-menu.active .nav-links {
        display: flex !important; /* 모바일 메뉴 내부 링크는 항상 보이도록 강제 */
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        padding: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 2rem 1rem;
    }
    
    .hero {
        padding: 100px 1rem 2rem;
    }
    
    .component-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .support-content {
        grid-template-columns: 1fr;
    }
}