/* ================================
   Derpnerd - Unified Style
   모든 페이지 통합 스타일
================================ */

:root {
    /* Pastel Color Palette */
    --primary: #f4a5a5;           /* Soft Pink */
    --primary-light: #ffd4d4;     /* Lighter Pink */
    --primary-dark: #e88b8b;      /* Darker Pink */
    
    --secondary: #b8d8d8;         /* Soft Mint */
    --secondary-light: #d4eded;   /* Lighter Mint */
    --secondary-dark: #9ec4c4;    /* Darker Mint */
    
    --accent: #ffc4a3;            /* Soft Peach */
    --accent-light: #ffd9c4;      /* Lighter Peach */
    --accent-dark: #ffb088;       /* Darker Peach */
    
    --lavender: #d4b5d4;          /* Soft Lavender */
    --sage: #c4d4b8;              /* Soft Sage */
    
    /* Background Colors */
    --bg-main: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    --bg-card: #fefefe;           /* Off White */
    --bg-hover: #f9f9f9;          /* Hover White */
    --bg-section: #fafafa;        /* Section Gray */
    
    /* Text Colors */
    --text-primary: #4a4a4a;      /* Soft Dark Gray */
    --text-secondary: #7a7a7a;    /* Medium Gray */
    --text-muted: #adadad;        /* Light Gray */
    --text-white: #ffffff;        /* White */
    
    /* Document Text (for privacy/terms) */
    --doc-text: #333;             /* Dark text for documents */
    --doc-heading: #667eea;       /* Blue for headings */
    
    /* Border & Shadow */
    --border: #e8e8e8;            /* Very Light Gray */
    --border-dark: #d4d4d4;       /* Light Gray */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 10px;
    --radius-md: 15px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ===== RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-main);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    margin: 0 !important;
    padding-top: 140px !important;
}

/* ===== HEADER ===== */
.combined-header {
    background: var(--bg-card);
    border-bottom: 2px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 2.5rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    box-shadow: var(--shadow-md);
}

.combined-header::before {
    display: none;
}

.logo-section {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
}

.logo a {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-left: 0.75rem;
    padding-left: 0.75rem;
    border-left: 2px solid var(--border);
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
    font-weight: 500;
    background: var(--bg-section);
    border: 1px solid var(--border);
}

.nav-link:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    border-color: var(--primary);
    color: var(--primary-dark);
    box-shadow: var(--shadow-sm);
}

/* ===== SUB MENU ===== */
.sub-menu {
    background: var(--bg-card);
    padding: 0 2.5rem;
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.sub-menu-tabs {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.sub-tab-dropdown {
    position: relative;
    display: inline-block;
}

.sub-tab {
    background: transparent;
    color: var(--text-primary);
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-sm);
}

.sub-tab:hover {
    background: var(--secondary-light);
    color: var(--secondary-dark);
    transform: translateY(-2px);
}

.sub-tab.active {
    background: linear-gradient(135deg, var(--secondary-light) 0%, var(--accent-light) 100%);
    color: var(--secondary-dark);
    box-shadow: var(--shadow-sm);
}

.dropdown-icon {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
    opacity: 0.8;
}

.sub-tab-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    padding: 0.75rem 0.5rem;
    margin-top: 0.5rem;
    opacity: 0;
    transform: translateY(-8px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.sub-tab-dropdown:hover .dropdown-content {
    display: block;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.dropdown-content a {
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin: 0.125rem 0;
}

.dropdown-content a:hover {
    background: var(--accent-light);
    color: var(--accent-dark);
    transform: translateX(4px);
}

.sub-tab-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 8px;
    background: transparent;
    z-index: 999;
}

.top-body-spacer {
    height: 2rem;
}

/* ===== MAIN CONTENT ===== */
.main-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem 3rem;
}

.main-layout {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
    min-height: calc(100vh - 200px);
}

.main-content {
    background: transparent;
    padding: 3rem 0;
    margin-top: 0 !important;
}

.content-header {
    text-align: center;
    margin-bottom: 3rem;
}

.content-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.content-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 400;
}

/* ===== DASHBOARD GRID ===== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* ===== SERVICE CARDS ===== */
.service-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.service-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.service-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, var(--secondary-light) 0%, var(--accent-light) 100%);
    border: 1px solid var(--secondary);
    color: var(--secondary-dark);
}

.status-online {
    background: linear-gradient(135deg, #d4f4dd 0%, #b8e7c7 100%);
    border-color: #9ec4b4;
    color: #5a9370;
}

.status-offline {
    background: linear-gradient(135deg, var(--secondary-light) 0%, var(--accent-light) 100%);
    border-color: var(--secondary);
    color: var(--secondary-dark);
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 0.9375rem;
}

.card-stats {
    background: var(--bg-section);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

.stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.stat-item:first-child {
    padding-top: 0;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-value {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
}

.card-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    flex: 1;
    padding: 0.875rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    color: var(--text-white);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: var(--text-white);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
}

/* ===== TABS ===== */
.service-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
}

.tab-btn {
    background: var(--bg-section);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 600;
    font-size: 0.9rem;
}

.tab-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.tab-content {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    display: none;
}

.tab-content.active {
    opacity: 1;
    transform: translateY(0);
    display: block;
}

/* ===== IFRAME ===== */
.iframe-container {
    width: 100%;
    height: 700px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    box-shadow: var(--shadow-md);
}

.iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-section);
}

::-webkit-scrollbar-thumb {
    background: var(--border-dark);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== FOOTER ===== */
footer {
    margin-top: 4rem;
    padding: 2rem;
    background: var(--bg-card);
    border-top: 2px solid var(--border);
    color: var(--text-secondary);
}

footer a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ================================
   PRIVACY & TERMS PAGES
================================ */

/* Common Document Styles */
.privacy-container,
.terms-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.privacy-content,
.terms-content {
    background: white;
    padding: 40px 30px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    color: var(--text-primary) !important;
}

.privacy-content *,
.terms-content * {
    color: inherit !important;
}

.privacy-content p,
.privacy-content li,
.privacy-content ol,
.privacy-content ul,
.terms-content p,
.terms-content li,
.terms-content ol,
.terms-content ul {
    color: var(--text-primary) !important;
}

.privacy-content h1,
.terms-content h1 {
    color: var(--primary) !important;
    font-size: 28px;
    margin-bottom: 10px;
    text-align: center;
}

.updated {
    font-size: 14px;
    opacity: 0.7;
    text-align: center;
    margin-bottom: 30px;
    color: var(--text-secondary) !important;
}

.intro {
    background-color: #f8f9fa;
    padding: 20px;
    border-left: 4px solid var(--primary);
    margin-bottom: 30px;
    border-radius: 4px;
    color: var(--text-primary) !important;
}

.intro p {
    color: var(--text-primary) !important;
}

.section {
    margin-bottom: 40px;
}

.section h2 {
    color: var(--primary) !important;
    font-size: 20px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary);
}

.section h3 {
    color: var(--secondary-dark) !important;
    font-size: 16px;
    margin: 20px 0 10px 0;
}

.section p {
    margin-bottom: 15px;
    line-height: 1.7;
    color: var(--text-primary) !important;
}

.article {
    margin-bottom: 25px;
}

.article-number {
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 16px;
}

ul, ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

ul li, ol li {
    margin-bottom: 8px;
    line-height: 1.6;
    color: var(--text-primary) !important;
}

.highlight {
    background-color: #fff3cd;
    padding: 2px 6px;
    border-radius: 3px;
    color: #856404 !important;
    font-weight: 600;
}

.important-box {
    background-color: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}

.important-box strong {
    color: #856404;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background-color: white;
}

table th {
    background-color: var(--primary);
    color: white !important;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

table td {
    padding: 12px;
    border: 1px solid #ddd;
    color: var(--text-primary) !important;
}

table tr:nth-child(even) {
    background-color: #f8f9fa;
}

.contact-box {
    background-color: #f0f4ff;
    padding: 20px;
    border-radius: 8px;
    margin-top: 20px;
}

.contact-box h3 {
    color: var(--primary) !important;
    margin-bottom: 10px;
}

.contact-box p {
    color: var(--text-primary) !important;
}

.terms-nav-links {
    background-color: #f8f9fa;
    padding: 15px 30px;
    text-align: center;
    border-bottom: 1px solid #ddd;
    margin-bottom: 30px;
    border-radius: 4px;
}

.terms-nav-links a {
    color: var(--primary);
    text-decoration: none;
    margin: 0 15px;
    font-weight: 600;
    transition: var(--transition);
}

.terms-nav-links a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    body {
        padding-top: 130px !important;
    }
    
    .content-title {
        font-size: 2.5rem;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
    
    .privacy-container,
    .terms-container {
        padding: 15px;
    }
    
    .privacy-content,
    .terms-content {
        padding: 30px 20px;
    }
    
    .privacy-content h1,
    .terms-content h1 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 180px !important;
    }
    
    .combined-header {
        height: auto;
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .subtitle {
        display: none;
    }
    
    .nav-links {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .sub-menu {
        position: relative;
        top: auto;
    }
    
    .content-title {
        font-size: 2rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .privacy-container,
    .terms-container {
        padding: 10px;
    }
    
    .privacy-content,
    .terms-content {
        padding: 20px 15px;
    }
    
    .privacy-content h1,
    .terms-content h1 {
        font-size: 22px;
    }
    
    .section h2 {
        font-size: 18px;
    }
    
    .article-number {
        font-size: 15px;
    }
    
    .terms-nav-links {
        padding: 10px 15px;
    }
    
    .terms-nav-links a {
        display: block;
        margin: 5px 0;
    }
    
    .contact-box {
        padding: 15px;
    }
    
    table {
        font-size: 14px;
    }
    
    table th,
    table td {
        padding: 8px;
    }
}

@media (max-width: 480px) {
    .privacy-content,
    .terms-content {
        padding: 15px 10px;
    }
    
    .privacy-content h1,
    .terms-content h1 {
        font-size: 20px;
    }
    
    .section h2 {
        font-size: 16px;
    }
    
    .section h3 {
        font-size: 14px;
    }
    
    .article-number {
        font-size: 14px;
    }
    
    .intro,
    .important-box,
    .contact-box {
        padding: 12px;
        font-size: 14px;
    }
    
    table {
        font-size: 12px;
    }
    
    table th,
    table td {
        padding: 6px;
    }
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.hidden { display: none !important; }
.visible { display: block !important; }

/* ===================================
   SPA 페이지 전환 애니메이션
=================================== */

/* Body만 페이드 효과 */
#body-section {
    transition: opacity 0.2s ease-in-out;
    opacity: 1;
}

#body-section.fade-out {
    opacity: 0;
}

#body-section.fade-in {
    opacity: 1;
}

/* Top/Footer는 항상 표시 (페이드 안 함) */
#top-section,
#footer-section {
    opacity: 1 !important;
    transition: none !important;
}

/* 페이지 전체 FOUC 방지는 유지하되, 초기 로드에만 적용 */
html:not(.loaded) {
    opacity: 0;
}

html.loaded {
    opacity: 1;
}

/* 로드 후엔 Top/Footer에 transition 제거 */
html.loaded #top-section,
html.loaded #footer-section {
    transition: none !important;
}

/* ===================================
   부드러운 페이지 전환
=================================== */

.main-layout {
    position: relative;
}

#body-section {
    will-change: opacity;
}

/* 페이지 전환 중 스크롤 방지 (선택사항) */
body.page-transitioning {
    overflow: hidden;
}