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

:root {
    /* Color Palette - Mint/Green Theme (紐⑤몢?섏닔?????ㅽ??? */
    --color-primary: #2EC4B6;
    --color-primary-light: #5DD9CD;
    --color-primary-lighter: #E0F7F5;
    --color-primary-bg: #F0FAF9;
    
    --color-text-primary: #2D3748;
    --color-text-secondary: #4A5568;
    --color-text-light: #718096;
    
    --color-bg-white: #FFFFFF;
    --color-bg-light: #F7FAFC;
    --color-bg-section: #FAFCFB;
    
    --color-border: #E2E8F0;
    --color-border-light: #EDF2F7;
    
    --color-warning: #E8A84C;
    --color-warning-bg: #FEF6E8;
    
    /* Typography */
    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 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;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    
    /* Container */
    --container-max: 800px;
    --container-padding: 1.5rem;
}

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.header {
    background-color: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-primary-lighter) 0%, var(--color-bg-white) 100%);
    padding: var(--space-3xl) 0;
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
}

.hero-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Section Common */
.section {
    padding: var(--space-2xl) 0;
}

.card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.section-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-primary-lighter);
    letter-spacing: -0.01em;
}

.section-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

/* Service Intro */
.intro-content p {
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.intro-content p:last-of-type {
    margin-bottom: var(--space-lg);
}

.intro-content strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-primary-bg);
    border-radius: var(--radius-md);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--color-text-secondary);
}

.feature-icon {
    font-size: 1.25rem;
    width: 2rem;
    text-align: center;
}

/* Process Steps */
.process-steps {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.step-number {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.step-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.step-connector {
    width: 2px;
    height: 1.5rem;
    background-color: var(--color-primary-light);
    margin-left: calc(var(--space-lg) + 1.25rem - 1px);
}

/* Info Boxes */
.info-box {
    padding: var(--space-lg);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    border-left: 3px solid var(--color-primary);
}

.info-box:last-child {
    margin-bottom: 0;
}

.info-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.info-box p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.info-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.info-list li {
    position: relative;
    padding-left: var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.info-list li::before {
    content: "??;
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.info-list li strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* App Guide */
.app-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.app-feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-lg);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.app-feature-item.reverse {
    flex-direction: row-reverse;
}

.app-screenshot {
    flex-shrink: 0;
    width: 200px;
    height: 400px;
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-screenshot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    image-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    will-change: transform;
}

.app-screenshot::before {
    content: "?벑";
    font-size: 3rem;
    opacity: 0.3;
}

.app-screenshot:has(img[src]) {
    background: none;
}

.app-screenshot:has(img[src])::before {
    display: none;
}

.app-feature-content {
    flex: 1;
}

.feature-step {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    background-color: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
}

.app-feature-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.app-feature-content p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.app-notice {
    margin-top: var(--space-xl);
    padding: var(--space-md);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-sm);
    text-align: center;
}

.app-notice p {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

/* Pricing Content */
.pricing-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-lg);
}

.pricing-content h3:first-child {
    margin-top: 0;
}

.pricing-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

/* Refund Policy */
.policy-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.policy-item {
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
}

.policy-header {
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-primary-lighter);
    border-bottom: 1px solid var(--color-border-light);
}

.policy-badge {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
}

.policy-badge.warning {
    color: var(--color-warning);
}

.policy-item:has(.policy-badge.warning) .policy-header {
    background-color: var(--color-warning-bg);
}

.policy-content {
    padding: var(--space-lg);
}

.policy-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-sm);
}

.policy-content p:first-child {
    color: var(--color-text-primary);
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.policy-content p:last-child {
    margin-bottom: 0;
}

.policy-notice {
    padding: var(--space-lg);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.notice-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

/* Customer Support */
.support-content > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}

.support-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.support-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.support-icon {
    font-size: 1.5rem;
    width: 2.5rem;
    text-align: center;
}

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

.support-info p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.support-notice {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

/* Footer */
.footer {
    background-color: var(--color-text-primary);
    color: var(--color-bg-light);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-xl);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.footer .logo-text {
    color: var(--color-bg-white);
}

.footer-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-bg-light);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.business-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.business-list li {
    display: flex;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.business-list .label {
    min-width: 140px;
    color: rgba(255, 255, 255, 0.5);
}

.business-list .value {
    color: rgba(255, 255, 255, 0.85);
}

.copyright {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 640px) {
    :root {
        --container-padding: 1rem;
    }
    
    html {
        font-size: 15px;
    }
    
    .hero {
        padding: var(--space-2xl) 0;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .card {
        padding: var(--space-lg);
        border-radius: var(--radius-md);
    }
    
    .section-title {
        font-size: 1.25rem;
    }
    
    .step {
        padding: var(--space-md);
        gap: var(--space-md);
    }
    
    .step-number {
        width: 2rem;
        height: 2rem;
        font-size: 0.875rem;
    }
    
    .step-connector {
        margin-left: calc(var(--space-md) + 1rem - 1px);
    }
    
    .feature-list {
        padding: var(--space-md);
    }
    
    .info-box {
        padding: var(--space-md);
    }
    
    .policy-content,
    .policy-header {
        padding: var(--space-md);
    }
    
    .support-item {
        padding: var(--space-md);
        gap: var(--space-md);
    }
    
    .business-list li {
        flex-direction: column;
        gap: var(--space-xs);
    }
    
    .business-list .label {
        min-width: auto;
    }
    
    /* App Guide Mobile */
    .app-feature-item,
    .app-feature-item.reverse {
        flex-direction: column;
        text-align: center;
    }
    
    .app-screenshot {
        width: 160px;
        height: 320px;
    }
    
    .feature-step {
        margin-bottom: var(--space-xs);
    }
}

/* Print Styles */
@media print {
    .header {
        position: static;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    
    .section {
        padding: 1rem 0;
    }
}