/* =============================================
   서면노래방닷컴 - 메인 스타일시트
   Author: SEO Expert & Local Content Marketer
   Version: 1.0
   ============================================= */

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

:root {
    /* Color Palette */
    --primary-color: #FF6B6B;
    --secondary-color: #4ECDC4;
    --accent-color: #FFE66D;
    --dark-color: #2C3E50;
    --light-color: #ECF0F1;
    --white-color: #FFFFFF;
    --gray-color: #95A5A6;
    --success-color: #2ECC71;
    --warning-color: #F39C12;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    /* Typography */
    --font-primary: 'Noto Sans KR', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--dark-color);
    background-color: var(--light-color);
    overflow-x: hidden;
}

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

/* =============================================
   Header & Navigation
   ============================================= */
.header {
    background: var(--white-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-base);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-base);
}

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

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-color);
    cursor: pointer;
}

/* =============================================
   Hero Section
   ============================================= */
.hero {
    position: relative;
    background: var(--gradient-primary);
    background-image: linear-gradient(rgba(102, 126, 234, 0.85), rgba(118, 75, 162, 0.85)), url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: bottom;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.hero-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    font-weight: 500;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--white-color);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* =============================================
   Section Styles
   ============================================= */
.section {
    padding: var(--spacing-xl) 0;
    background: var(--white-color);
}

.section-alt {
    background: var(--light-color);
}

.section-title {
    font-size: 2rem;
    font-weight: 900;
    color: var(--dark-color);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.subsection-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.subsection-title i {
    color: var(--primary-color);
}

/* =============================================
   Card Grid
   ============================================= */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.card {
    background: var(--white-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.card.featured::before {
    height: 6px;
    background: var(--gradient-secondary);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-badge {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--gradient-secondary);
    color: var(--white-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.card-header {
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
}

.card-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--warning-color);
}

.rating-text {
    color: var(--gray-color);
    font-size: 0.9rem;
    margin-left: var(--spacing-xs);
}

.card-body {
    margin-top: var(--spacing-sm);
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.95rem;
    color: var(--dark-color);
}

.info-item i {
    color: var(--primary-color);
    width: 20px;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--light-color);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--dark-color);
}

.feature-list i {
    color: var(--success-color);
    font-size: 0.85rem;
}

/* =============================================
   Comparison Section
   ============================================= */
.comparison-container {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.comparison-card {
    background: linear-gradient(145deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 2px solid var(--light-color);
    transition: var(--transition-base);
}

.comparison-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.comparison-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.comparison-header h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.comparison-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.comparison-feature {
    padding: var(--spacing-xs) 0;
}

.comparison-feature strong {
    display: block;
    color: var(--dark-color);
    margin-bottom: 4px;
    font-size: 0.95rem;
}

.comparison-feature p {
    color: var(--gray-color);
    font-size: 0.9rem;
    line-height: 1.5;
}

.comparison-pros {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed var(--light-color);
}

.comparison-pros p {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--dark-color);
}

.comparison-pros i {
    color: var(--success-color);
}

/* =============================================
   Section Images
   ============================================= */
.section-image-container {
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.section-image {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-slow);
}

.section-image:hover {
    transform: scale(1.05);
}

/* =============================================
   Coin Noraebang Section
   ============================================= */
.info-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.coin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.coin-card {
    background: linear-gradient(145deg, #fff5e6 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 2px solid #ffe8cc;
    text-align: center;
    transition: var(--transition-base);
}

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

.coin-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.coin-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
}

.coin-location {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.coin-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin: var(--spacing-sm) 0;
    padding: var(--spacing-sm);
    background: var(--white-color);
    border-radius: var(--radius-sm);
}

.coin-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

.coin-detail .label {
    color: var(--gray-color);
    font-weight: 500;
}

.coin-detail .value {
    color: var(--dark-color);
    font-weight: 700;
}

.coin-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.tag {
    display: inline-block;
    background: var(--warning-color);
    color: var(--white-color);
    padding: 4px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

/* =============================================
   Group Noraebang Section
   ============================================= */
.group-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.group-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.group-card {
    background: linear-gradient(145deg, #f0f4ff 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 2px solid #d4e2ff;
    transition: var(--transition-base);
}

.group-card.highlight {
    background: linear-gradient(145deg, #fff5f0 0%, #ffffff 100%);
    border: 2px solid var(--primary-color);
}

.group-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.group-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--secondary-color);
}

.group-card.highlight .group-header {
    border-bottom-color: var(--primary-color);
}

.group-header i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.group-card.highlight .group-header i {
    color: var(--primary-color);
}

.group-header h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark-color);
}

.group-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.group-desc {
    color: var(--gray-color);
    font-size: 0.95rem;
    line-height: 1.5;
}

.group-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.group-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--dark-color);
}

.group-features i {
    color: var(--success-color);
}

.group-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed var(--light-color);
}

.price-label {
    color: var(--gray-color);
    font-size: 0.9rem;
}

.price-value {
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 700;
}

/* =============================================
   Tips Section
   ============================================= */
.tips-container {
    margin-top: var(--spacing-lg);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.tip-card {
    background: var(--white-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border-left: 4px solid var(--secondary-color);
}

.tip-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.tip-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.tip-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--spacing-xs);
}

.tip-card p {
    color: var(--gray-color);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* =============================================
   Price Table
   ============================================= */
.price-table-container {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--white-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.table-responsive {
    overflow-x: auto;
    margin-top: var(--spacing-md);
}

.price-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white-color);
}

.price-table thead {
    background: var(--gradient-primary);
    color: var(--white-color);
}

.price-table th {
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 700;
    font-size: 0.95rem;
}

.price-table tbody tr {
    border-bottom: 1px solid var(--light-color);
    transition: var(--transition-fast);
}

.price-table tbody tr:hover {
    background: #f8f9fa;
}

.price-table td {
    padding: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--dark-color);
}

.price-note {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: #fff9e6;
    border-left: 4px solid var(--warning-color);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--dark-color);
}

.price-note i {
    color: var(--warning-color);
}

/* =============================================
   FAQ Section
   ============================================= */
.faq-container {
    max-width: 900px;
    margin: var(--spacing-lg) auto 0;
}

.faq-item {
    background: var(--white-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--white-color);
    border: none;
    text-align: left;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition-base);
}

.faq-question:hover {
    background: #f8f9fa;
    color: var(--primary-color);
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition-base);
}

.faq-question[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-answer.active {
    max-height: 2000px;
}

.faq-answer p,
.faq-answer ul,
.faq-answer div {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--gray-color);
    font-size: 0.95rem;
    line-height: 1.7;
}

.faq-answer ul {
    list-style: none;
    padding-left: calc(var(--spacing-md) + 20px);
}

.faq-answer ul li {
    margin-bottom: var(--spacing-xs);
    position: relative;
}

.faq-answer ul li::before {
    content: '•';
    position: absolute;
    left: -15px;
    color: var(--primary-color);
    font-weight: 700;
}

.faq-answer strong {
    color: var(--dark-color);
    font-weight: 600;
}

.faq-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--gradient-secondary);
    color: var(--white-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
    transition: var(--transition-base);
}

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

/* =============================================
   CTA Section
   ============================================= */
.cta-section {
    background: var(--gradient-primary);
    color: var(--white-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
}

.cta-text {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--white-color);
    color: var(--primary-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.cta-button i {
    font-size: 1.5rem;
}

.cta-subtext {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    opacity: 0.85;
}

/* =============================================
   Footer
   ============================================= */
.footer {
    background: var(--dark-color);
    color: var(--light-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-sm);
}

.footer-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-title i {
    color: var(--primary-color);
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.6;
    opacity: 0.85;
}

.footer-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white-color);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--light-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.footer-tag {
    background: rgba(255, 255, 255, 0.1);
    padding: 4px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    transition: var(--transition-fast);
}

.footer-tag:hover {
    background: var(--primary-color);
    cursor: pointer;
}

.footer-contact {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--primary-color);
    color: var(--white-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-base);
}

.footer-contact:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-bottom: var(--spacing-xs);
}

.footer-disclaimer {
    font-size: 0.8rem !important;
    opacity: 0.6 !important;
}

/* =============================================
   Floating KakaoTalk Button
   ============================================= */
.floating-kakao {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--gradient-secondary);
    color: var(--white-color);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-base);
    z-index: 999;
    animation: pulse 2s infinite;
}

.floating-kakao:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(245, 87, 108, 0.4);
}

.floating-kakao i {
    font-size: 1.8rem;
}

.floating-text {
    font-size: 0.7rem;
    font-weight: 700;
    margin-top: 2px;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(245, 87, 108, 0.7);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(245, 87, 108, 0);
    }
}

/* =============================================
   Back to Top Button
   ============================================= */
.back-to-top {
    position: fixed;
    bottom: 120px;
    right: 30px;
    background: var(--dark-color);
    color: var(--white-color);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    z-index: 998;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.back-to-top i {
    font-size: 1.2rem;
}

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--white-color);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: var(--spacing-lg) 0;
        box-shadow: var(--shadow-md);
        transition: var(--transition-base);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: block;
    }
    
    /* Hero */
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    /* Sections */
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .subsection-title {
        font-size: 1.3rem;
    }
    
    /* Cards */
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid,
    .coin-grid,
    .group-grid,
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    /* Table */
    .price-table {
        font-size: 0.8rem;
    }
    
    .price-table th,
    .price-table td {
        padding: var(--spacing-xs);
    }
    
    /* CTA */
    .cta-title {
        font-size: 1.5rem;
    }
    
    .cta-text {
        font-size: 1rem;
    }
    
    .cta-button {
        font-size: 1rem;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* Floating Button */
    .floating-kakao {
        width: 60px;
        height: 60px;
        bottom: 20px;
        right: 20px;
    }
    
    .floating-kakao i {
        font-size: 1.5rem;
    }
    
    .floating-text {
        font-size: 0.65rem;
    }
    
    .back-to-top {
        bottom: 95px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    /* Typography */
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    /* Spacing */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Cards */
    .card,
    .comparison-card,
    .coin-card,
    .group-card,
    .tip-card {
        padding: var(--spacing-sm);
    }
}

/* =============================================
   Modal Popup Styles
   ============================================= */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--white-color);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.4s ease;
    z-index: 1;
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--light-color);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
    z-index: 2;
}

.modal-close:hover {
    background: var(--primary-color);
    color: var(--white-color);
    transform: rotate(90deg);
}

.modal-header {
    background: var(--gradient-primary);
    color: var(--white-color);
    padding: var(--spacing-lg);
    text-align: center;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.modal-header i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-text {
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--dark-color);
    margin-bottom: var(--spacing-lg);
}

.contact-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.kakao-btn {
    background: var(--gradient-secondary);
    color: var(--white-color);
}

.kakao-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.telegram-section {
    background: linear-gradient(145deg, #f0f8ff 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    border: 2px solid #e3f2fd;
}

.telegram-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    font-size: 1.05rem;
    color: #0088cc;
    margin-bottom: var(--spacing-sm);
}

.telegram-label i {
    font-size: 1.3rem;
}

.qr-code-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.qr-code {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 3px solid #0088cc;
}

.telegram-id {
    font-size: 1.1rem;
    font-weight: 700;
    color: #0088cc;
    background: var(--white-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin: 0;
}

.modal-benefits {
    margin-top: var(--spacing-lg);
    background: linear-gradient(145deg, #fff9f0 0%, #ffffff 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 2px solid #ffe8cc;
}

.benefits-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.benefits-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
}

.benefits-list li {
    font-size: 0.9rem;
    color: var(--dark-color);
    padding: 4px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* =============================================
   Print Styles
   ============================================= */
@media print {
    .header,
    .hero,
    .floating-kakao,
    .back-to-top,
    .cta-section,
    .modal {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid var(--gray-color);
    }
}

/* Modal Mobile Responsive */
@media (max-width: 480px) {
    .modal-content {
        width: 95%;
    }
    
    .modal-header {
        padding: var(--spacing-md);
    }
    
    .modal-header i {
        font-size: 2.5rem;
    }
    
    .modal-header h3 {
        font-size: 1.2rem;
    }
    
    .modal-body {
        padding: var(--spacing-md);
    }
    
    .qr-code {
        width: 180px;
        height: 180px;
    }
    
    .benefits-list {
        grid-template-columns: 1fr;
    }
}