/* Pretendard 웹폰트 CDN */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.min.css');

/* CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Variables for Theming - Coderon Theme Palette */
:root {
    /* Light Theme - Coderon Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f3f3f4;
    --bg-tertiary: #eeeeef;
    --bg-accent: linear-gradient(135deg, #ae00ee 0%, #60b0ba 100%);
    --bg-accent-solid: #f3f3f4;
    --text-primary: #10141f;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-accent: #10141f;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    --accent-color: linear-gradient(135deg, #ae00ee 0%, #60b0ba 100%);
    --accent-solid: #ae00ee;
    --accent-hover: linear-gradient(135deg, #9900cc 0%, #4a8a94 100%);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #60b0ba;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --glow: 0 0 0 1px rgba(174, 0, 238, 0.1);
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

[data-theme="dark"] {
    /* Dark Theme - Coderon Colors */
    --bg-primary: #10141f;
    --bg-secondary: #1a1e2e;
    --bg-tertiary: #242938;
    --bg-accent: linear-gradient(135deg, #d60067 0%, #60b0ba 100%);
    --bg-accent-solid: #1a1e2e;
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --text-accent: #ffffff;
    --border-color: #374151;
    --border-light: #4b5563;
    --accent-color: linear-gradient(135deg, #d60067 0%, #60b0ba 100%);
    --accent-solid: #d60067;
    --accent-hover: linear-gradient(135deg, #b8005a 0%, #4a8a94 100%);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #60b0ba;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px 0 rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --glow: 0 0 0 1px rgba(214, 0, 103, 0.2);
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.65;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s ease;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    transition: all 0.3s ease;
}

[data-theme="dark"] .header {
    background-color: rgba(15, 23, 42, 0.95);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.875rem;
    font-weight: 700;
    background: var(--accent-color);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
    letter-spacing: -0.025em;
}

.logo h1 a {
    color: inherit;
    text-decoration: none;
}

.tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.nav-menu a:hover {
    color: var(--accent-color);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: 2rem;
}

/* Language Selector Dropdown */
.lang-selector {
    position: relative;
    display: inline-block;
}

.lang-toggle {
    background: var(--bg-secondary);
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 5rem;
}

.lang-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-accent);
}

.lang-arrow {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
    opacity: 0.7;
}

.lang-selector.open .lang-arrow {
    transform: rotate(180deg);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.5rem);
    transition: all 0.3s ease;
    min-width: 100%;
    z-index: 1000;
    overflow: hidden;
}

.lang-selector.open .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.lang-option:hover {
    background: var(--bg-secondary);
    color: var(--text-accent);
}

.lang-option.active {
    background: var(--accent-solid);
    color: white;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-secondary);
    border: none;
    border-radius: var(--radius);
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    font-weight: 500;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-accent);
}

.theme-icon {
    font-size: 1.2rem;
}

/* Sections */
section {
    padding: 5rem 0;
}

@media (max-width: 768px) {
    section {
        padding: 3rem 0;
    }
}

.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    text-align: center;
    padding: 8rem 0;
    position: relative;
}

@media (max-width: 768px) {
    .hero {
        padding: 5rem 0;
    }
}

.hero h2 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .hero h2 {
        font-size: 2.5rem;
    }
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    letter-spacing: 0.025em;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover::before {
    left: 100%;
}

/* Apps Section */
.apps {
    background-color: var(--bg-secondary);
}

.apps h2, .about h2, .contact h2 {
    text-align: center;
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 4rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
    line-height: 1.2;
}

@media (max-width: 768px) {
    .apps h2, .about h2, .contact h2 {
        font-size: 2.25rem;
        margin-bottom: 3rem;
    }
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 0;
}

@media (max-width: 768px) {
    .apps-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.app-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-icon {
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3.5rem;
    height: 3.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.app-icon-img {
    width: 3rem;
    height: 3rem;
    object-fit: contain;
    border-radius: 0.5rem;
}

.app-card h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.6;
    font-size: 0.875rem;
}

.app-status {
    margin-bottom: 1rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    text-transform: uppercase;
}

.status-live {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
}

.status-upcoming {
    background-color: rgba(96, 176, 186, 0.15);
    color: var(--info-color);
}

.status-planning {
    background-color: rgba(174, 0, 238, 0.15);
    color: var(--accent-solid);
}

/* App Links */
.app-links {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.app-link {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.app-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.app-link-ios {
    background-color: #007AFF;
    color: white;
    border-color: #007AFF;
}

.app-link-ios:hover {
    background-color: #0056CC;
}

.app-link-android {
    background-color: #3DDC84;
    color: white;
    border-color: #3DDC84;
}

.app-link-android:hover {
    background-color: #00C853;
}

.app-link-web {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.app-link-web:hover {
    background-color: var(--accent-hover);
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

/* Contact Section */
.contact {
    background-color: var(--bg-secondary);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-info p {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-accent);
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Loading Animation */
.animate-spin {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Policy Page Loading and Error States */
.policy-loading {
    text-align: center;
    padding: 3rem 0;
}

.policy-loading .spinner {
    width: 2rem;
    height: 2rem;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--accent-solid);
    border-radius: 50%;
    margin: 0 auto 1rem;
}

.policy-loading p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.policy-error {
    text-align: center;
    padding: 3rem 0;
    color: var(--warning-color);
}

.policy-error .error-icon {
    width: 3rem;
    height: 3rem;
    margin: 0 auto 1rem;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.policy-error h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.policy-error p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Policy Page Styles */
.privacy-policy .policy-content {
    line-height: 1.8;
}

.privacy-policy h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.privacy-policy h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-accent);
}

.privacy-policy h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-accent);
}

.privacy-policy ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.privacy-policy li {
    margin-bottom: 0.5rem;
}

.privacy-policy .policy-meta {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 3rem;
}

.privacy-policy .contact-info {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius);
}

.delegation-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border-radius: var(--radius);
    overflow: hidden;
    background-color: var(--bg-primary);
}

.delegation-table th,
.delegation-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--bg-secondary);
}

.delegation-table th {
    background-color: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    color: var(--text-secondary);
}

.delegation-table tr:last-child td {
    border-bottom: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .nav-controls {
        margin-left: 0;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .apps h2, .about h2, .contact h2 {
        font-size: 2rem;
    }

    .apps-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.5rem;
    }

    section {
        padding: 2rem 0;
    }

    .hero {
        padding: 3rem 0;
    }

    .app-card {
        padding: 1.5rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Focus States for Accessibility */
.btn:focus,
.theme-toggle:focus,
.lang-selector a:focus,
a:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}