/* Premium Sky Blue & Platinum Soft Theme Design System */
:root {
    --primary-bg: #f3f6f9;       /* 부드러운 아이스 플래티넘 연하늘색 */
    --secondary-bg: #e7edf3;     /* 부드럽고 톤 다운된 에어 블루 */
    --accent-gold: #2b6cb0;      /* 고급스러운 새틴 스카이 블루 */
    --accent-gold-hover: #1a4f7e;/* 깊이감을 더하는 딥 스카이 블루 */
    --text-primary: #1a202c;     /* 가독성이 최고인 딥 차콜 */
    --text-muted: #5a6a85;       /* 세련된 미디엄 스틸 블루 */
    --card-bg: #ffffff;          /* 깨끗한 순백색 카드 */
    --card-border: rgba(43, 108, 176, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(43, 108, 176, 0.1);
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    font-family: 'Outfit', 'Noto Sans KR', sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    overscroll-behavior-x: none; /* Prevent iOS/Android swipe back/forward bounce */
}

/* Base Body Adjustments */
body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Premium Header Styles */
.premium-header {
    background-color: rgba(243, 246, 249, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 1030;
}

.premium-header .navbar {
    padding: 0.8rem 0;
}

.premium-header .navbar-brand {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.premium-header .brand-symbol i {
    color: var(--accent-gold);
    font-size: 1.4rem;
}

/* Sky Blue Buttons (keeping old gold variable/class names for code compatibility) */
.btn-outline-gold {
    color: var(--accent-gold);
    border-color: var(--accent-gold);
    background-color: transparent;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-outline-gold:hover {
    color: #ffffff;
    background-color: var(--accent-gold);
    border-color: var(--accent-gold);
    box-shadow: 0 0 10px rgba(43, 108, 176, 0.3);
}

.btn-gold {
    color: #ffffff;
    background-color: var(--accent-gold);
    border-color: var(--accent-gold);
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-gold:hover {
    background-color: var(--accent-gold-hover);
    border-color: var(--accent-gold-hover);
    color: #ffffff;
    box-shadow: 0 0 12px rgba(43, 108, 176, 0.4);
}

/* Main Content Area */
.main-content {
    flex: 1 0 auto;
    padding: 2.5rem 0;
    background: radial-gradient(circle at top, #fafbfc 0%, var(--primary-bg) 70%);
}

/* Premium Cards with Glassmorphism */
.premium-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(43, 108, 176, 0.05);
    transition: transform 0.3s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.3s ease;
}

.premium-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(43, 108, 176, 0.12);
    border-color: rgba(43, 108, 176, 0.35);
}

/* Dashboard List Style */
.premium-table {
    color: var(--text-primary);
}

.premium-table th {
    border-top: none;
    border-bottom: 2px solid var(--accent-gold);
    color: var(--accent-gold);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.premium-table td {
    border-bottom: 1px solid rgba(43, 108, 176, 0.12);
    padding: 1rem 0.75rem;
    vertical-align: middle;
}

.premium-table tr:hover td {
    background-color: rgba(43, 108, 176, 0.03);
}

/* Footer Style */
.premium-footer {
    background-color: #e2e8f0;
    border-top: 1px solid rgba(43, 108, 176, 0.15);
    padding: 1.5rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-sub {
    font-size: 0.75rem;
    letter-spacing: 1px;
}

/* Search Form Customization */
.premium-input-group .form-control {
    background-color: #ffffff;
    border: 1px solid rgba(43, 108, 176, 0.25);
    color: var(--text-primary);
    border-radius: 12px 0 0 12px;
    padding: 0.75rem 1.2rem;
}

.premium-input-group .form-control:focus,
.premium-input-group .form-control:-webkit-autofill,
.premium-input-group .form-control:-webkit-autofill:hover, 
.premium-input-group .form-control:-webkit-autofill:focus {
    color: var(--text-primary) !important;
    background-color: #ffffff !important;
    border-color: var(--accent-gold) !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    box-shadow: 0 0 0px 1000px #ffffff inset, 0 0 0 0.25rem rgba(43, 108, 176, 0.15) !important;
    transition: background-color 5000s ease-in-out 0s;
}

.premium-input-group .btn {
    border-radius: 0 12px 12px 0;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.premium-select {
    background-color: #ffffff;
    border: 1px solid rgba(43, 108, 176, 0.25);
    color: var(--text-primary);
    border-radius: 12px;
    padding: 0.75rem 1.2rem;
}

.premium-select:focus {
    background-color: #ffffff;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 0.25rem rgba(43, 108, 176, 0.15);
}

/* Ensure premium-form-control has perfect contrast on autofill and focus */
.premium-form-control {
    background-color: #ffffff !important;
    border: 1px solid rgba(43, 108, 176, 0.25) !important;
    color: var(--text-primary) !important;
}

.premium-form-control:focus,
.premium-form-control:-webkit-autofill,
.premium-form-control:-webkit-autofill:hover, 
.premium-form-control:-webkit-autofill:focus {
    color: var(--text-primary) !important;
    background-color: #ffffff !important;
    border-color: var(--accent-gold) !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    box-shadow: 0 0 0px 1000px #ffffff inset, 0 0 0 0.25rem rgba(43, 108, 176, 0.15) !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* Booklet Viewer & Mobile Swipe Layout */
.booklet-container {
    max-width: 1000px;
    margin: 0 auto;
}

.booklet-viewport {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(43, 108, 176, 0.1);
    border: 1px solid rgba(43, 108, 176, 0.2);
    background: #ffffff;
    color: #333333;
    aspect-ratio: 4 / 3;
    margin-bottom: 1.5rem;
    overscroll-behavior-x: none;
}

@media (max-width: 768px) {
    .booklet-viewport {
        aspect-ratio: auto;
        height: 72vh; /* Lock height on mobile to force scroll bar inside booklet-page instead of page body */
        max-height: 72vh;
    }
}

.booklet-slider {
    display: flex;
    height: 100%;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    touch-action: pan-y; /* Allow vertical scroll, hijack horizontal swipe */
    will-change: transform;
    transform: translate3d(0, 0, 0); /* Force GPU acceleration */
}

.booklet-page {
    min-width: 100%;
    height: 100%;
    padding: 0 !important; /* Cleared to allow exact 100% min-height on child content wrapper */
    overflow-y: auto;
    background: #ffffff;
    box-sizing: border-box;
    position: relative;
}

/* PC Side-by-side Layout (Book Spread) */
@media (min-width: 992px) {
    .booklet-viewport.spread-mode {
        aspect-ratio: 8 / 3;
    }
    .booklet-viewport.spread-mode .booklet-page {
        min-width: 50%;
        border-right: 1px solid #e2e8f0;
    }
    .booklet-viewport.spread-mode .booklet-page:nth-child(even) {
        border-right: none;
        box-shadow: inset 15px 0 20px -15px rgba(0,0,0,0.06);
    }
    .booklet-viewport.spread-mode .booklet-page:nth-child(odd) {
        box-shadow: inset -15px 0 20px -15px rgba(0,0,0,0.06);
    }
}

/* Dynamic Page Content Styles (Overriding pasted tables & elements) */
.page-content-wrapper {
    line-height: 1.6;
    font-size: 1.05rem;
    color: #2d3748 !important;
    padding: 2.5rem; /* Moved from parent booklet-page */
    box-sizing: border-box;
}

/* Force dark text color for all nested copy/paste elements on white pages */
.bulletin-html-render,
.bulletin-html-render *,
.bulletin-html-render p, 
.bulletin-html-render span, 
.bulletin-html-render td, 
.bulletin-html-render th, 
.bulletin-html-render li,
.bulletin-html-render div {
    color: #2d3748 !important;
}

.bulletin-html-render strong {
    color: #000000 !important;
    font-weight: 700;
}

.page-content-wrapper h1, .page-content-wrapper h2, .page-content-wrapper h3 {
    color: #000000 !important;
    margin-top: 0;
    font-weight: 700;
}

/* HWP/Word pasted Table Overrides for Responsive Design */
.page-content-wrapper table {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    border-collapse: collapse !important;
    margin: 1.5rem 0 !important;
    table-layout: fixed !important;
    font-size: 0.95rem !important;
}

.page-content-wrapper td, .page-content-wrapper th {
    padding: 8px 12px !important;
    border: 1px solid #cbd5e0 !important;
    word-break: break-all !important;
    height: auto !important;
}

/* Tablet & Mobile Table Wrapper */
.table-responsive-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* Booklet Navigation */
.booklet-nav-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(43, 108, 176, 0.05);
    border: 1px solid rgba(43, 108, 176, 0.15);
    border-radius: 14px;
    padding: 0.8rem 1.5rem;
}

.page-indicator {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-gold);
}

/* YouTube Area */
.youtube-section {
    margin-top: 3rem;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(43, 108, 176, 0.04);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Admin Write Page Multi-editor Tab Layout */
.admin-tab-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(43, 108, 176, 0.04);
}

.nav-tabs-gold {
    border-bottom: 2px solid rgba(43, 108, 176, 0.15);
}

.nav-tabs-gold .nav-link {
    color: var(--text-muted);
    border: none;
    background: transparent;
    padding: 0.8rem 1.5rem;
    font-weight: 500;
    margin-bottom: -2px;
}

.nav-tabs-gold .nav-link.active {
    color: var(--accent-gold);
    border-bottom: 3px solid var(--accent-gold);
    background: transparent;
}

/* Editor Style adjustments */
.tox-tinymce {
    border-radius: 0 0 10px 10px !important;
    border-color: rgba(43, 108, 176, 0.2) !important;
}

/* Mobile optimizations for WebView */
@media (max-width: 576px) {
    .premium-header .navbar-brand {
        font-size: 1.1rem;
    }
    .main-content {
        padding: 1.5rem 0;
    }
    .premium-card {
        padding: 1.2rem;
    }
    .booklet-page {
        padding: 0 !important;
    }
    .page-content-wrapper {
        padding: 1.2rem !important; /* Apply smaller padding for content on mobile */
    }
}

/* Ensure form labels in admin layouts are completely visible and dark in light theme */
.form-label, 
.form-label.text-muted,
.admin-tab-container label,
.premium-card label,
.premium-card .form-label,
#bulletinForm label {
    color: #4a5568 !important;
}

/* Premium Tip Box for Light Theme */
.premium-tip-box {
    background-color: rgba(43, 108, 176, 0.06) !important;
    border: 1px solid rgba(43, 108, 176, 0.2) !important;
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: 0 4px 12px rgba(43, 108, 176, 0.03);
}

.premium-tip-box h6 {
    color: var(--accent-gold) !important;
    font-weight: 700 !important;
    margin-bottom: 0.5rem;
}

.premium-tip-box p {
    color: #4a5568 !important;
    line-height: 1.6;
    margin: 0;
}

/* Table Action Buttons Layout Fix */
.premium-table td {
    white-space: nowrap !important;
}

.premium-table td .btn {
    white-space: nowrap !important;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    flex-shrink: 0 !important;
    min-width: 75px; /* Ensure buttons have enough visual presence */
}

/* Fallbacks for Gold styling classes to match Sky Blue Theme */
.text-gold {
    color: var(--accent-gold) !important;
}

.text-gold-light {
    color: var(--accent-gold) !important;
}

.text-gold-dark {
    color: var(--accent-gold-hover) !important;
}

.bg-gold-dark {
    background-color: var(--accent-gold) !important;
    border: 1px solid var(--accent-gold-hover) !important;
    color: #ffffff !important;
}

.bg-gold-light {
    background-color: rgba(43, 108, 176, 0.08) !important;
    color: var(--accent-gold-hover) !important;
    border: 1px solid rgba(43, 108, 176, 0.25) !important;
}

/* Custom Overrides for Booklet Viewer Meta Header */
.viewer-meta-header {
    background-color: rgba(43, 108, 176, 0.08) !important;
    border: 1px solid var(--card-border) !important;
}