:root{--color-primary: #1a1a2e;--color-secondary: #16213e;--color-accent: #0f4c75;--color-highlight: #00b4d8;--color-light: #e6f7ff;--color-white: #ffffff;--color-gray: #6c757d;--color-orange: #f97316;--color-footer:#1a1a2e;--viewer-bg-dark: #1a1a2e;--viewer-bg-medium: #16213e;--viewer-bg-light: #0f4c75;--viewer-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);--viewer-card-bg: rgba(255, 255, 255, .98);--viewer-border: rgba(226, 232, 240, .8);--viewer-shadow: 0 8px 32px rgba(15, 76, 117, .08);--viewer-gradient: linear-gradient(135deg, #0f4c75 0%, #00b4d8 100%);--viewer-accent: #0f4c75;--viewer-highlight: #00b4d8;--viewer-text: #1e293b;--viewer-text-light: #64748b;--viewer-canvas-height: 600px;--viewer-header-height: 400px;--color-background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);--color-surface: #f8f9fa;--color-text: #212529;--color-text-secondary: #6c757d;--color-border: #dee2e6;--color-success: #28a745;--color-warning: #ffc107;--color-error: #dc3545;--color-info: #17a2b8;--card-bg: var(--color-white);--input-bg: var(--color-white);--modal-overlay: rgba(0, 0, 0, .5);--font-primary: "Inter", sans-serif;--font-secondary: "Poppins", sans-serif;--font-family-base: var(--font-primary), system-ui, -apple-system, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--font-size-4xl: 2.5rem;--line-height-base: 1.6;--spacing-unit: 1rem;--space-xs: calc(var(--spacing-unit) * .25);--space-sm: calc(var(--spacing-unit) * .5);--space-md: var(--spacing-unit);--space-lg: calc(var(--spacing-unit) * 1.5);--space-xl: calc(var(--spacing-unit) * 2);--space-2xl: calc(var(--spacing-unit) * 3);--spacing-xs: var(--space-xs);--spacing-sm: var(--space-sm);--spacing-md: var(--space-md);--spacing-lg: var(--space-lg);--spacing-xl: var(--space-xl);--spacing-2xl: var(--space-2xl);--border-radius: 8px;--border-radius-base: var(--border-radius);--border-width: 1px;--border-color: var(--color-border);--container-width: 1200px;--header-height: 80px;--sidebar-width: 280px;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 8px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .2);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--transition-speed: var(--transition-normal);--transition-timing: ease;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal-backdrop: 1040;--z-modal: 1050;--z-popover: 1060;--z-tooltip: 1070}.dark-theme{--color-background: #1a202c;--color-surface: #2d3748;--color-text: #e2e8f0;--color-text-secondary: #a0aec0;--color-border: #4a5568;--color-success: #48bb78;--color-warning: #ed8936;--color-error: #f56565;--color-info: #4299e1;--color-footer:#00e6cc;--color-white: #1a202c;--color-primary: #4da6ff;--color-secondary: #2d3748;--color-accent: #00e6cc;--color-highlight: #00e6cc;--color-light: #2d3748;--color-orange: #fdba74;--viewer-bg-dark: #0a0a1a;--viewer-bg-medium: #1a202c;--viewer-bg-light: #2d3748;--card-bg: var(--color-surface);--input-bg: var(--color-surface);--modal-overlay: rgba(0, 0, 0, .7);--viewer-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);--viewer-card-bg: rgba(30, 41, 59, .98);--viewer-border: rgba(71, 85, 105, .8);--viewer-shadow: 0 8px 32px rgba(0, 0, 0, .3);--viewer-text: #f1f5f9;--viewer-text-light: #94a3b8}.high-contrast{--color-background: #000000;--color-surface: #111111;--color-text: #ffffff;--color-text-secondary: #cccccc;--color-border: #ffffff;--color-success: #00ff00;--color-warning: #ffff00;--color-error: #ff0000;--color-info: #00ffff;--color-primary: #0066cc;--color-secondary: #004080;--color-accent: #00aaff;--color-highlight: #00ffff;--color-light: #111111;--color-orange: #ffa500;--viewer-bg-dark: #000000;--viewer-bg-medium: #111111;--viewer-bg-light: #222222;--contrast-boost: 20%;--color-primary: color-mix(in srgb, #0066cc, black var(--contrast-boost));--color-accent: color-mix(in srgb, #00aaff, white var(--contrast-boost));--card-bg: var(--color-surface);--input-bg: var(--color-surface);--modal-overlay: rgba(0, 0, 0, .9);--shadow-sm: 0 0 0 1px var(--color-border);--shadow-md: 0 0 0 2px var(--color-border);--shadow-lg: 0 0 0 3px var(--color-border)}*{margin:0;padding:0;box-sizing:border-box;transition:background-color var(--transition-speed) var(--transition-timing),color var(--transition-speed) var(--transition-timing),border-color var(--transition-speed) var(--transition-timing),box-shadow var(--transition-speed) var(--transition-timing)}html{scroll-behavior:smooth}body{font-family:var(--font-family-base);font-size:var(--font-size-base);line-height:var(--line-height-base);color:var(--color-text);background-color:var(--color-background);transition:background-color var(--transition-speed) var(--transition-timing),color var(--transition-speed) 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var(--transition-fast)}a:hover{color:var(--color-highlight)}.mt-xs{margin-top:var(--spacing-xs)}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}.mt-xl{margin-top:var(--spacing-xl)}.mb-xs{margin-bottom:var(--spacing-xs)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.mb-xl{margin-bottom:var(--spacing-xl)}.text-center{text-align:center}.text-right{text-align:right}.text-left{text-align:left}.text-primary{color:var(--color-primary)}.text-secondary{color:var(--color-text-secondary)}.text-success{color:var(--color-success)}.text-warning{color:var(--color-warning)}.text-error{color:var(--color-error)}.text-info{color:var(--color-info)}.d-block{display:block}.d-inline{display:inline}.d-inline-block{display:inline-block}.d-flex{display:flex}.d-grid{display:grid}.theme-transition{transition:all var(--transition-speed) var(--transition-timing)}.no-transition{transition:none!important}:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.skip-to-content{position:absolute;top:-40px;left:0;background:var(--color-primary);color:var(--color-white);padding:var(--spacing-sm) var(--spacing-md);z-index:var(--z-popover)}.skip-to-content:focus{top:0}@media(prefers-reduced-motion:reduce){:root{--transition-fast: .01ms;--transition-normal: .01ms;--transition-slow: .01ms;--transition-speed: .01ms}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}@media print{:root{--color-background: white !important;--color-surface: white !important;--color-text: black !important;--color-text-secondary: #666 !important;--color-border: #ddd !important;--color-primary: black !important;--color-secondary: #333 !important}.dark-theme,.high-contrast{--color-background: white;--color-surface: white;--color-text: black;--color-text-secondary: #666;--color-border: #ddd;--color-primary: black;--color-secondary: #333}*{transition:none!important}.no-print{display:none!important}a{color:#000!important;text-decoration:underline}.page-break{page-break-before:always}}@media(min-width:768px){:root{--container-width: 720px}}@media(min-width:992px){:root{--container-width: 960px}}@media(min-width:1200px){:root{--container-width: 1140px}}@media(min-width:1920px){:root{--container-width: 1600px}}.card{background-color:var(--card-bg);border-radius:var(--border-radius);border:var(--border-width) solid var(--color-border);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-fast)}.card:hover{box-shadow:var(--shadow-md)}.btn{display:inline-block;padding:var(--spacing-sm) var(--spacing-lg);background-color:var(--color-primary);color:var(--color-white);border:none;border-radius:var(--border-radius);cursor:pointer;font-family:inherit;font-size:var(--font-size-base);font-weight:500;line-height:1.5;text-align:center;text-decoration:none;transition:all var(--transition-fast)}.btn:hover{background-color:var(--color-accent);transform:translateY(-1px)}.btn:active{transform:translateY(0)}.input{width:100%;padding:var(--spacing-sm) var(--spacing-md);background-color:var(--input-bg);color:var(--color-text);border:var(--border-width) solid var(--color-border);border-radius:var(--border-radius);font-family:inherit;font-size:var(--font-size-base);transition:border-color var(--transition-fast)}.input:focus{outline:none;border-color:var(--color-accent)}body:has(.common-header){padding-top:var(--header-height)!important}html{scroll-padding-top:calc(var(--header-height) + 20px)}.common-header{position:fixed;top:0;left:0;right:0;z-index:var(--z-sticky);background:color-mix(in srgb,var(--color-white) 95%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid color-mix(in srgb,var(--color-text) 8%,transparent);transition:all var(--transition-fast);height:var(--header-height)}.common-header--scrolled{background:color-mix(in srgb,var(--color-white) 98%,transparent);box-shadow:var(--shadow-sm)}.dark-theme .common-header{background:color-mix(in srgb,var(--color-surface) 95%,transparent);border-bottom:1px solid color-mix(in srgb,var(--color-text) 8%,transparent)}.dark-theme .common-header--scrolled{background:color-mix(in srgb,var(--color-surface) 98%,transparent);box-shadow:0 4px 20px #0000004d}.high-contrast .common-header{background:var(--color-surface);border-bottom:2px solid var(--color-border)}.high-contrast .common-header--scrolled{background:var(--color-surface);box-shadow:0 0 0 2px var(--color-border)}.common-header-container{margin:0 auto;padding:0 var(--spacing-md);display:flex;align-items:center;justify-content:space-between;height:100%}.common-header-logo-link{display:flex;align-items:center;gap:var(--spacing-sm);text-decoration:none;transition:opacity var(--transition-fast)}.common-header-logo-link:hover{opacity:.9}.common-header-logo-icon{position:relative;width:40px;height:40px}.common-header-logo-icon-db{position:absolute;top:0;left:0;color:var(--color-accent);font-size:28px}.common-header-logo-icon-chart{position:absolute;bottom:0;right:0;color:var(--color-highlight);font-size:20px}.common-header-logo-texts{display:flex;flex-direction:column}.common-header-logo-main{font-size:var(--font-size-lg);font-weight:700;color:var(--color-primary);line-height:1.2;font-family:var(--font-secondary)}.common-header-logo-sub{font-size:var(--font-size-xs);color:var(--color-text-secondary);font-weight:400}.dark-theme .common-header-logo-main{color:var(--color-text)}.high-contrast .common-header-logo-main{color:var(--color-text);font-weight:800}.common-header-nav-list{display:flex;list-style:none;margin:0;padding:0;gap:var(--spacing-xs)}.common-header-nav-item{position:relative}.common-header-nav-link{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);color:var(--color-text-secondary);text-decoration:none;border-radius:var(--border-radius);font-weight:500;font-size:var(--font-size-sm);transition:all var(--transition-fast)}.common-header-nav-link:hover,.common-header-nav-link--active{background:color-mix(in srgb,var(--color-accent) 10%,transparent);color:var(--color-accent)}.common-header-nav-link--admin{color:var(--color-highlight)}.common-header-nav-link--admin:hover,.common-header-nav-link--admin.common-header-nav-link--active{background:color-mix(in srgb,var(--color-highlight) 10%,transparent);color:var(--color-highlight)}.common-header-nav-icon{font-size:var(--font-size-sm)}.common-header-nav-text{white-space:nowrap}.common-header-nav-link-indicator{position:absolute;bottom:-6px;left:50%;transform:translate(-50%);width:4px;height:4px;background:var(--color-accent);border-radius:50%;opacity:0;transition:opacity var(--transition-normal)}.common-header-nav-link--active .common-header-nav-link-indicator{opacity:1}.common-header-nav-link--admin .common-header-nav-link-indicator{background:var(--color-highlight)}.dark-theme .common-header-nav-link{color:var(--color-text-secondary)}.dark-theme .common-header-nav-link:hover{color:var(--color-text)}.high-contrast .common-header-nav-link{border:1px solid transparent}.high-contrast .common-header-nav-link:hover{border-color:var(--color-border)}.common-header-actions{display:flex;align-items:center;gap:var(--spacing-sm)}.common-header-login-button,.common-header-signup-button,.common-header-admin-button{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--border-radius);font-weight:500;font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-normal);border:none;font-family:inherit}.common-header-login-button{background:transparent;color:var(--color-accent);border:1px solid var(--color-accent)}.common-header-login-button:hover{background:var(--color-accent);color:var(--color-white)}.common-header-signup-button{background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-highlight) 100%);color:var(--color-white)}.common-header-signup-button:hover{background:linear-gradient(135deg,var(--color-highlight) 0%,var(--color-accent) 100%);transform:translateY(-1px);box-shadow:var(--shadow-md)}.common-header-admin-button{background:linear-gradient(135deg,var(--color-highlight) 0%,var(--color-accent) 100%);color:var(--color-white);padding:var(--spacing-xs) var(--spacing-md)}.common-header-admin-button:hover{background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-highlight) 100%);transform:translateY(-1px);box-shadow:var(--shadow-md)}.high-contrast .common-header-login-button,.high-contrast .common-header-signup-button,.high-contrast .common-header-admin-button{border:2px solid var(--color-border)}.common-header-user-section{display:flex;align-items:center;gap:var(--spacing-sm)}.common-header-user-dropdown-container{position:relative}.common-header-user-button{display:flex;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-xs) var(--spacing-sm);background:var(--color-light);border:1px solid var(--color-border);border-radius:var(--border-radius);cursor:pointer;transition:all var(--transition-fast)}.common-header-user-button:hover{background:color-mix(in srgb,var(--color-border) 30%,transparent);border-color:color-mix(in srgb,var(--color-border) 50%,transparent)}.common-header-user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-highlight) 100%);display:flex;align-items:center;justify-content:center;color:var(--color-white);font-weight:600;font-size:var(--font-size-xs);overflow:hidden}.common-header-user-avatar-img{width:100%;height:100%;object-fit:cover}.common-header-user-avatar-text{line-height:1}.common-header-user-name{font-weight:500;font-size:var(--font-size-sm);color:var(--color-text)}.common-header-user-caret{font-size:var(--font-size-xs);color:var(--color-text-secondary);transition:transform var(--transition-fast)}.common-header-user-button:hover .common-header-user-caret{color:var(--color-text)}.common-header-user-dropdown{position:absolute;top:calc(100% + 8px);right:0;width:280px;background:var(--color-white);border-radius:var(--border-radius);box-shadow:var(--shadow-lg);border:1px solid var(--color-border);z-index:var(--z-dropdown);animation:dropdownSlide var(--transition-fast)}@keyframes dropdownSlide{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.dark-theme .common-header-user-dropdown{background:var(--color-surface);border-color:var(--color-border)}.high-contrast .common-header-user-dropdown{background:var(--color-surface);border:2px solid var(--color-border)}.common-header-user-dropdown-header{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);border-bottom:1px solid var(--color-border)}.common-header-user-dropdown-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-highlight) 100%);display:flex;align-items:center;justify-content:center;color:var(--color-white);font-weight:600;font-size:var(--font-size-base);overflow:hidden}.common-header-user-dropdown-info{flex:1}.common-header-user-dropdown-name{font-weight:600;color:var(--color-text);margin-bottom:2px}.common-header-user-dropdown-email{font-size:var(--font-size-xs);color:var(--color-text-secondary);margin-bottom:4px}.common-header-user-dropdown-admin{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;background:color-mix(in srgb,var(--color-highlight) 10%,transparent);color:var(--color-highlight);border-radius:12px;font-size:var(--font-size-xs);font-weight:600}.common-header-user-dropdown-menu{padding:var(--spacing-xs) 0}.common-header-user-dropdown-item{display:flex;align-items:center;gap:var(--spacing-sm);width:100%;padding:var(--spacing-sm) var(--spacing-md);background:none;border:none;text-align:left;color:var(--color-text-secondary);font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-fast)}.common-header-user-dropdown-item:hover{background:var(--color-light);color:var(--color-accent)}.common-header-user-dropdown-item svg{width:16px;color:var(--color-text-secondary)}.common-header-user-dropdown-item:hover svg{color:var(--color-accent)}.common-header-user-dropdown-divider{height:1px;background:var(--color-border);margin:var(--spacing-xs) 0}.common-header-user-dropdown-item--logout{color:var(--color-error)}.common-header-user-dropdown-item--logout:hover{background:color-mix(in srgb,var(--color-error) 10%,transparent);color:var(--color-error)}.common-header-user-dropdown-item--logout svg{color:var(--color-error)}.common-header-mobile-toggle{display:none;background:none;border:none;padding:var(--spacing-xs);cursor:pointer;color:var(--color-text-secondary)}.common-header-mobile-toggle-icon{font-size:var(--font-size-lg)}.scroll-progress-bar{position:absolute;bottom:-1px;left:0;right:0;height:4px;background:color-mix(in srgb,var(--color-accent) 10%,transparent);overflow:hidden}.scroll-progress-indicator{height:100%;background:linear-gradient(90deg,var(--color-accent) 0%,var(--color-highlight) 100%);transition:width var(--transition-fast)}.common-header-mobile-menu{position:fixed;top:0;right:-100%;width:320px;height:100vh;background:var(--color-white);z-index:var(--z-modal);transition:right var(--transition-normal);box-shadow:-4px 0 20px #0000001a}.dark-theme .common-header-mobile-menu{background:var(--color-surface)}.high-contrast .common-header-mobile-menu{background:var(--color-surface);border-left:2px solid var(--color-border)}.common-header-mobile-menu.open{right:0}.common-header-mobile-menu-content{height:100%;display:flex;flex-direction:column}.common-header-mobile-menu-header{display:flex;justify-content:space-between;align-items:flex-start;padding:var(--spacing-lg);border-bottom:1px solid var(--color-border)}.common-header-mobile-menu-user{flex:1}.common-header-mobile-menu-avatar{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-highlight) 100%);display:flex;align-items:center;justify-content:center;color:var(--color-white);font-weight:600;font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm);overflow:hidden}.common-header-mobile-menu-user-info{margin-bottom:var(--spacing-xs)}.common-header-mobile-menu-user-name{font-weight:600;color:var(--color-text);margin-bottom:2px}.common-header-mobile-menu-user-email{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:6px}.common-header-mobile-menu-user-admin{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;background:color-mix(in srgb,var(--color-highlight) 10%,transparent);color:var(--color-highlight);border-radius:16px;font-size:var(--font-size-xs);font-weight:600}.common-header-mobile-menu-guest{display:flex;align-items:center;gap:var(--spacing-sm)}.common-header-mobile-menu-guest-icon{font-size:var(--font-size-3xl);color:var(--color-text-secondary)}.common-header-mobile-menu-guest-text{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-weight:500}.common-header-mobile-menu-close{background:none;border:none;padding:var(--spacing-xs);cursor:pointer;color:var(--color-text-secondary);font-size:var(--font-size-lg)}.common-header-mobile-menu-list{flex:1;list-style:none;margin:0;padding:var(--spacing-md) 0;overflow-y:auto}.common-header-mobile-menu-item{margin:0}.common-header-mobile-menu-link{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);color:var(--color-text);text-decoration:none;font-size:var(--font-size-base);font-weight:500;transition:all 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