@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/assets/inter-latin-ext-DO1Apj_S.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/assets/inter-latin-Dx4kXJAl.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--color-primary: #0F5EA8;--color-primary-dark: #083E70;--color-primary-light: #E8F0FA;--color-primary-focus: #0A4880;--color-accent: #D97706;--color-accent-dark: #B45309;--color-success: #0B7A3B;--color-success-light: #D1FAE5;--color-warning: #D97706;--color-warning-light: #FEF3C7;--color-error: #C1272D;--color-error-light: #FEE2E2;--color-text: #1A1A1A;--color-text-secondary: #4A4A4A;--color-text-disabled: #767676;--color-text-inverse: #FFFFFF;--color-bg: #F7F9FC;--color-surface: #FFFFFF;--color-surface-raised: #FFFFFF;--color-border: #767676;--color-border-focus: #0F5EA8;--color-divider: #E5E7EB;--font-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.75;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-focus: 0 0 0 3px rgb(15 94 168 / .35);--sidebar-width: 16rem;--header-height: 4rem;--content-max-width: 75rem;--panel-width: 20rem;--transition-fast: .15s ease;--transition-normal: .25s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:100%;scroll-behavior:smooth;text-size-adjust:100%;-webkit-text-size-adjust:100%}body{font-family:var(--font-base);font-size:var(--text-base);line-height:var(--leading-normal);color:var(--color-text);background-color:var(--color-bg);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:var(--font-bold);line-height:var(--leading-tight);color:var(--color-text)}h1{font-size:var(--text-3xl)}h2{font-size:var(--text-2xl)}h3{font-size:var(--text-xl)}h4{font-size:var(--text-lg)}h5{font-size:var(--text-base)}h6{font-size:var(--text-sm)}p{line-height:var(--leading-relaxed);color:var(--color-text)}p+p{margin-top:var(--space-4)}a{color:var(--color-primary);text-decoration:underline;text-underline-offset:2px}a:hover{color:var(--color-primary-dark);text-decoration:underline}a:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:2px;border-radius:var(--radius-sm);text-decoration:none}:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:2px;border-radius:var(--radius-sm)}:focus:not(:focus-visible){outline:none}.skip-link{position:absolute;top:-999px;left:var(--space-4);z-index:9999;padding:var(--space-2) var(--space-4);background:var(--color-primary);color:var(--color-text-inverse);font-weight:var(--font-semibold);text-decoration:none;border-radius:var(--radius-md);white-space:nowrap}.skip-link:focus{top:var(--space-4);outline:3px solid var(--color-text-inverse);outline-offset:2px}ul,ol{padding-left:var(--space-6)}li{line-height:var(--leading-normal)}img,svg{display:block;max-width:100%}table{border-collapse:collapse;width:100%;font-size:var(--text-sm)}caption{font-weight:var(--font-semibold);font-size:var(--text-base);text-align:left;margin-bottom:var(--space-3);color:var(--color-text)}th,td{padding:var(--space-3) var(--space-4);text-align:left;vertical-align:top;border-bottom:1px solid var(--color-divider)}th{font-weight:var(--font-semibold);background-color:var(--color-primary-light);color:var(--color-text);white-space:nowrap}tr:hover td{background-color:var(--color-primary-light)}label{display:block;font-weight:var(--font-medium);font-size:var(--text-sm);color:var(--color-text);margin-bottom:var(--space-1)}input[type=text],input[type=email],input[type=password],input[type=search],select,textarea{display:block;width:100%;padding:var(--space-2) var(--space-3);font-family:var(--font-base);font-size:var(--text-base);color:var(--color-text);background-color:var(--color-surface);border:1.5px solid var(--color-border);border-radius:var(--radius-md);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);min-height:2.5rem}input[type=text]:focus,input[type=email]:focus,input[type=password]:focus,input[type=search]:focus,select:focus,textarea:focus{outline:none;border-color:var(--color-border-focus);box-shadow:var(--shadow-focus)}input[aria-invalid=true],select[aria-invalid=true],textarea[aria-invalid=true]{border-color:var(--color-error)}input[type=checkbox],input[type=radio]{width:1.125rem;height:1.125rem;accent-color:var(--color-primary);cursor:pointer;min-height:auto}fieldset{border:1.5px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4)}legend{font-weight:var(--font-semibold);font-size:var(--text-sm);padding:0 var(--space-2);color:var(--color-text)}.required-mark{color:var(--color-error);margin-left:var(--space-1);aria-hidden:true}.field-error{color:var(--color-error);font-size:var(--text-sm);margin-top:var(--space-1);display:flex;align-items:center;gap:var(--space-1)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}hr{border:none;border-top:1px solid var(--color-divider);margin:var(--space-6) 0}code{font-family:var(--font-mono);font-size:var(--text-sm);background-color:var(--color-primary-light);padding:.125rem var(--space-1);border-radius:var(--radius-sm)}@media (max-width: 480px){h1{font-size:var(--text-2xl)}h2{font-size:var(--text-xl)}h3{font-size:var(--text-lg)}}.app-shell{display:flex;flex-direction:column;min-height:100vh}.site-header{position:sticky;top:0;z-index:100;height:var(--header-height);background-color:var(--color-primary);color:var(--color-text-inverse);box-shadow:var(--shadow-md);display:flex;align-items:center;padding:0 var(--space-4)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:var(--content-max-width);margin:0 auto;gap:var(--space-4)}.site-header__brand{display:flex;align-items:center;gap:var(--space-3);text-decoration:none;color:var(--color-text-inverse)}.site-header__logo{width:2rem;height:2rem;flex-shrink:0}.site-header__title{font-size:var(--text-lg);font-weight:var(--font-bold);line-height:1.2;color:var(--color-text-inverse)}.site-header__title span{display:block;font-size:var(--text-xs);font-weight:var(--font-normal);opacity:.85}.site-header__actions{display:flex;align-items:center;gap:var(--space-3)}.lang-switcher{display:flex;align-items:center;gap:var(--space-1)}.lang-btn{padding:var(--space-1) var(--space-3);font-size:var(--text-sm);font-weight:var(--font-semibold);font-family:var(--font-base);background:transparent;color:var(--color-text-inverse);border:1.5px solid rgb(255 255 255 / .5);border-radius:var(--radius-full);cursor:pointer;transition:background-color var(--transition-fast),border-color var(--transition-fast);min-height:2rem;min-width:2.5rem;line-height:1}.lang-btn[aria-pressed=true]{background:var(--color-primary-dark);border-color:var(--color-text-inverse)}.lang-btn:hover{background:#fff3}.lang-btn:focus-visible{outline:3px solid var(--color-text-inverse);outline-offset:2px}.header-user{display:flex;align-items:center;gap:var(--space-2);color:var(--color-text-inverse);font-size:var(--text-sm)}.header-user__avatar{width:2rem;height:2rem;border-radius:var(--radius-full);background:var(--color-primary-dark);display:flex;align-items:center;justify-content:center;font-weight:var(--font-bold);font-size:var(--text-xs);color:var(--color-text-inverse);flex-shrink:0}.app-layout{display:flex;flex:1}.sidebar{width:var(--sidebar-width);background-color:var(--color-surface);border-right:1px solid var(--color-divider);display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:var(--header-height);height:calc(100vh - var(--header-height));overflow-y:auto}.sidebar__nav{padding:var(--space-4) 0;flex:1}.sidebar__nav-list{list-style:none;padding:0}.sidebar__nav-item{margin:0}.sidebar__nav-link{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--color-text-secondary);text-decoration:none;border-left:3px solid transparent;transition:color var(--transition-fast),background-color var(--transition-fast),border-color var(--transition-fast);min-height:2.75rem}.sidebar__nav-link:hover{color:var(--color-primary);background-color:var(--color-primary-light);text-decoration:none}.sidebar__nav-link[aria-current=page]{color:var(--color-primary);background-color:var(--color-primary-light);border-left-color:var(--color-primary);font-weight:var(--font-semibold)}.sidebar__nav-link:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:-3px;border-radius:0}.sidebar__nav-icon{width:1.25rem;height:1.25rem;flex-shrink:0}.sidebar__divider{height:1px;background:var(--color-divider);margin:var(--space-2) var(--space-4)}.main-content{flex:1;padding:var(--space-6) var(--space-6);min-width:0;max-width:calc(var(--content-max-width) - var(--sidebar-width))}.site-footer{background-color:var(--color-text);color:var(--color-text-inverse);padding:var(--space-8) var(--space-4);margin-top:auto}.site-footer__inner{max-width:var(--content-max-width);margin:0 auto;display:flex;flex-wrap:wrap;gap:var(--space-6);justify-content:space-between;align-items:flex-start}.site-footer__brand{font-size:var(--text-sm);opacity:.9}.site-footer__brand strong{display:block;font-size:var(--text-base);margin-bottom:var(--space-1)}.site-footer__links{display:flex;flex-wrap:wrap;gap:var(--space-4) var(--space-6);list-style:none;padding:0}.site-footer__links a{color:#fffc;font-size:var(--text-sm);text-decoration:underline;text-underline-offset:2px}.site-footer__links a:hover{color:var(--color-text-inverse)}.site-footer__links a:focus-visible{outline:2px solid var(--color-text-inverse);outline-offset:2px;border-radius:var(--radius-sm)}.site-footer__copy{width:100%;font-size:var(--text-xs);color:#fff9;border-top:1px solid rgb(255 255 255 / .15);padding-top:var(--space-4);margin-top:var(--space-4)}.page-header{margin-bottom:var(--space-6)}.page-header__title{font-size:var(--text-3xl);font-weight:var(--font-bold);color:var(--color-text);margin-bottom:var(--space-2)}.page-header__subtitle{font-size:var(--text-base);color:var(--color-text-secondary)}.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-3);margin-bottom:var(--space-6);background:var(--color-surface);padding:var(--space-4);border-radius:var(--radius-lg);border:1px solid var(--color-divider);box-shadow:var(--shadow-sm)}.toolbar__search{flex:1;min-width:12rem;position:relative}.toolbar__search-input{padding-left:2.5rem!important}.toolbar__search-icon{position:absolute;left:var(--space-3);top:50%;transform:translateY(-50%);width:1rem;height:1rem;color:var(--color-text-secondary);pointer-events:none}.toolbar__select{min-width:12rem}.three-col-layout{display:grid;grid-template-columns:14rem 1fr 20rem;gap:var(--space-6);align-items:start}.panel{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-lg);padding:var(--space-4);box-shadow:var(--shadow-sm)}.panel__title{font-size:var(--text-base);font-weight:var(--font-semibold);color:var(--color-text);margin-bottom:var(--space-4);padding-bottom:var(--space-3);border-bottom:1px solid var(--color-divider)}@media (max-width: 1023px){.three-col-layout{grid-template-columns:1fr}.three-col-layout .panel:last-child{order:-1}}@media (max-width: 767px){.app-layout{flex-direction:column}.sidebar{width:100%;height:auto;position:static;border-right:none;border-bottom:1px solid var(--color-divider)}.sidebar__nav{display:flex;overflow-x:auto;padding:var(--space-2) 0;-webkit-overflow-scrolling:touch}.sidebar__nav-list{display:flex;flex-direction:row;min-width:max-content;padding:0 var(--space-2)}.sidebar__nav-link{white-space:nowrap;border-left:none;border-bottom:3px solid transparent;padding:var(--space-2) var(--space-3)}.sidebar__nav-link[aria-current=page]{border-left-color:transparent;border-bottom-color:var(--color-primary)}.main-content{padding:var(--space-4);max-width:100%}}@media (max-width: 480px){.site-header__title span{display:none}.toolbar{padding:var(--space-3)}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-5);font-family:var(--font-base);font-size:var(--text-base);font-weight:var(--font-semibold);line-height:1.25;text-decoration:none;border:2px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast),box-shadow var(--transition-fast);min-height:2.75rem;min-width:5rem;white-space:nowrap;-webkit-user-select:none;user-select:none}.btn:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:2px}.btn:disabled,.btn[aria-disabled=true]{opacity:.5;cursor:not-allowed;pointer-events:none}.btn--primary{background-color:var(--color-primary);color:var(--color-text-inverse);border-color:var(--color-primary)}.btn--primary:hover{background-color:var(--color-primary-dark);border-color:var(--color-primary-dark);color:var(--color-text-inverse);text-decoration:none}.btn--secondary{background-color:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn--secondary:hover{background-color:var(--color-primary-light);color:var(--color-primary-dark);text-decoration:none}.btn--ghost{background-color:transparent;color:var(--color-text-secondary);border-color:var(--color-border)}.btn--ghost:hover{background-color:var(--color-primary-light);color:var(--color-primary);border-color:var(--color-primary);text-decoration:none}.btn--danger{background-color:var(--color-error);color:var(--color-text-inverse);border-color:var(--color-error)}.btn--danger:hover{background-color:#9b1c21;border-color:#9b1c21;color:var(--color-text-inverse)}.btn--sm{font-size:var(--text-sm);padding:var(--space-1) var(--space-3);min-height:2.25rem;min-width:3rem}.btn--lg{font-size:var(--text-lg);padding:var(--space-3) var(--space-8);min-height:3.25rem}.btn--full{width:100%}.btn__icon{width:1.25rem;height:1.25rem;flex-shrink:0}.card{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-sm);transition:box-shadow var(--transition-normal),transform var(--transition-normal);display:flex;flex-direction:column}.card:hover{box-shadow:var(--shadow-md)}.card__header{display:flex;align-items:flex-start;gap:var(--space-3);margin-bottom:var(--space-4)}.card__icon{width:2.5rem;height:2.5rem;flex-shrink:0;background:var(--color-primary-light);color:var(--color-primary);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center}.card__title{font-size:var(--text-lg);font-weight:var(--font-semibold);color:var(--color-text);line-height:var(--leading-tight);flex:1}.card__body{flex:1;font-size:var(--text-sm);color:var(--color-text-secondary);line-height:var(--leading-relaxed);margin-bottom:var(--space-4)}.card__stat{font-size:var(--text-4xl);font-weight:var(--font-bold);color:var(--color-primary);line-height:1;margin-bottom:var(--space-1)}.card__stat-label{font-size:var(--text-xs);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;font-weight:var(--font-medium)}.card__footer{margin-top:auto;padding-top:var(--space-4);border-top:1px solid var(--color-divider);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-2)}.course-card{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:box-shadow var(--transition-normal)}.course-card:hover{box-shadow:var(--shadow-md)}.course-card__image{height:8rem;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);display:flex;align-items:center;justify-content:center;color:var(--color-text-inverse)}.course-card__body{padding:var(--space-4);flex:1;display:flex;flex-direction:column}.course-card__title{font-size:var(--text-base);font-weight:var(--font-semibold);color:var(--color-text);line-height:var(--leading-tight);margin-bottom:var(--space-2)}.course-card__desc{font-size:var(--text-sm);color:var(--color-text-secondary);line-height:var(--leading-normal);flex:1;margin-bottom:var(--space-3);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.course-card__meta{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-bottom:var(--space-3)}.course-card__footer{padding:var(--space-3) var(--space-4);border-top:1px solid var(--color-divider);background:var(--color-bg)}.badge{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-2);font-size:var(--text-xs);font-weight:var(--font-semibold);border-radius:var(--radius-full);line-height:1;white-space:nowrap}.badge--primary{background:var(--color-primary-light);color:var(--color-primary-dark)}.badge--success{background:var(--color-success-light);color:#065f46}.badge--warning{background:var(--color-warning-light);color:#92400e}.badge--error{background:var(--color-error-light);color:#991b1b}.badge--neutral{background:var(--color-divider);color:var(--color-text-secondary)}.tile-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(14rem,1fr));gap:var(--space-6);margin-bottom:var(--space-8)}.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(18rem,1fr));gap:var(--space-6)}@media (max-width: 480px){.course-grid{grid-template-columns:1fr}.tile-grid{grid-template-columns:1fr 1fr;gap:var(--space-4)}}.login-page{min-height:100vh;display:grid;grid-template-columns:1fr;background:var(--color-bg)}@media (min-width: 1024px){.login-page{grid-template-columns:1fr 1fr}}.login-form-panel{display:flex;flex-direction:column;justify-content:center;padding:var(--space-12) var(--space-8);background:var(--color-surface)}.login-form-panel__inner{max-width:26rem;width:100%;margin:0 auto}.login-info-panel{display:none;background:linear-gradient(160deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);color:var(--color-text-inverse);padding:var(--space-12) var(--space-8);flex-direction:column;justify-content:center}@media (min-width: 1024px){.login-info-panel{display:flex}}.login-info-panel__inner{max-width:28rem}.login-info-panel__title{font-size:var(--text-3xl);font-weight:var(--font-bold);color:var(--color-text-inverse);margin-bottom:var(--space-4);line-height:var(--leading-tight)}.login-info-panel__desc{font-size:var(--text-base);color:#ffffffd9;line-height:var(--leading-relaxed);margin-bottom:var(--space-8)}.login-info-panel__features{list-style:none;padding:0;display:flex;flex-direction:column;gap:var(--space-3)}.login-info-panel__features li{display:flex;align-items:flex-start;gap:var(--space-3);font-size:var(--text-sm);color:#ffffffe6}.login-info-panel__features li svg{flex-shrink:0;margin-top:2px}.login-divider{display:flex;align-items:center;gap:var(--space-3);margin:var(--space-5) 0}.login-divider__line{flex:1;height:1px;background:var(--color-divider)}.login-divider__text{font-size:var(--text-sm);color:var(--color-text-secondary);white-space:nowrap}.login-help-link{display:block;text-align:center;margin-top:var(--space-4);font-size:var(--text-sm)}.tree{list-style:none;padding:0;font-size:var(--text-sm)}.tree [role=treeitem]{padding:var(--space-2) var(--space-3);cursor:pointer;border-radius:var(--radius-sm);display:flex;align-items:center;gap:var(--space-2);color:var(--color-text-secondary);transition:background-color var(--transition-fast),color var(--transition-fast);min-height:2.25rem;-webkit-user-select:none;user-select:none}.tree [role=treeitem]:hover{background:var(--color-primary-light);color:var(--color-primary)}.tree [role=treeitem][aria-selected=true]{background:var(--color-primary-light);color:var(--color-primary);font-weight:var(--font-semibold)}.tree [role=treeitem]:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:-2px}.tree__expand-btn{background:none;border:none;padding:0;cursor:pointer;display:flex;align-items:center;justify-content:center;width:1rem;height:1rem;color:var(--color-text-secondary);flex-shrink:0;transition:transform var(--transition-fast)}.tree__group{list-style:none;padding-left:var(--space-6)}.data-table-wrap{overflow-x:auto;border-radius:var(--radius-lg);border:1px solid var(--color-divider);background:var(--color-surface);box-shadow:var(--shadow-sm)}.data-table{width:100%;min-width:36rem}.data-table th{background:var(--color-primary-light);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;color:var(--color-primary-dark);white-space:nowrap}.data-table th button{background:none;border:none;font:inherit;color:inherit;font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;font-weight:var(--font-semibold);cursor:pointer;display:inline-flex;align-items:center;gap:var(--space-1);padding:0}.data-table th button:focus-visible{outline:2px solid var(--color-border-focus);outline-offset:2px;border-radius:var(--radius-sm)}.data-table tbody tr:last-child td{border-bottom:none}.data-table tbody tr:focus-within{background:var(--color-primary-light)}.metadata-panel{position:sticky;top:calc(var(--header-height) + var(--space-4))}.metadata-panel__title{font-size:var(--text-base);font-weight:var(--font-semibold);color:var(--color-text);margin-bottom:var(--space-4)}.metadata-list{display:flex;flex-direction:column;gap:var(--space-3)}.metadata-item{display:flex;flex-direction:column;gap:var(--space-1)}.metadata-item__label{font-size:var(--text-xs);font-weight:var(--font-semibold);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em}.metadata-item__value{font-size:var(--text-sm);color:var(--color-text)}.metadata-item__value--tag{display:flex;flex-wrap:wrap;gap:var(--space-1)}.pagination{display:flex;align-items:center;justify-content:center;gap:var(--space-1);margin-top:var(--space-8);flex-wrap:wrap}.pagination__btn{display:inline-flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;font-size:var(--text-sm);font-weight:var(--font-medium);font-family:var(--font-base);color:var(--color-text-secondary);background:var(--color-surface);border:1.5px solid var(--color-divider);border-radius:var(--radius-md);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast),border-color var(--transition-fast);text-decoration:none}.pagination__btn:hover{background:var(--color-primary-light);color:var(--color-primary);border-color:var(--color-primary);text-decoration:none}.pagination__btn[aria-current=page]{background:var(--color-primary);color:var(--color-text-inverse);border-color:var(--color-primary);font-weight:var(--font-bold)}.pagination__btn:disabled{opacity:.4;cursor:not-allowed}.pagination__btn:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:2px}.filter-panel{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-lg);padding:var(--space-4);box-shadow:var(--shadow-sm);position:sticky;top:calc(var(--header-height) + var(--space-4))}.filter-panel__title{font-size:var(--text-base);font-weight:var(--font-semibold);color:var(--color-text);margin-bottom:var(--space-4);display:flex;align-items:center;justify-content:space-between}.filter-group{margin-bottom:var(--space-5)}.filter-group__label{font-size:var(--text-xs);font-weight:var(--font-semibold);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-2);display:block}.filter-option{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);cursor:pointer;transition:background-color var(--transition-fast);min-height:2rem}.filter-option:hover{background:var(--color-primary-light)}.filter-option label{font-size:var(--text-sm);color:var(--color-text);font-weight:var(--font-normal);cursor:pointer;margin:0;flex:1}.filter-option input{min-height:auto;width:auto}.alert{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-4);border-radius:var(--radius-md);font-size:var(--text-sm);line-height:var(--leading-normal);margin-bottom:var(--space-4)}.alert--info{background:var(--color-primary-light);color:var(--color-primary-dark);border:1px solid #bfdbfe}.alert--success{background:var(--color-success-light);color:#065f46;border:1px solid #a7f3d0}.alert--warning{background:var(--color-warning-light);color:#92400e;border:1px solid #fde68a}.alert--error{background:var(--color-error-light);color:#991b1b;border:1px solid #fecaca}.alert__icon{width:1.25rem;height:1.25rem;flex-shrink:0;margin-top:1px}.breadcrumb{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap;font-size:var(--text-sm);color:var(--color-text-secondary);margin-bottom:var(--space-4);list-style:none;padding:0}.breadcrumb li+li:before{content:"/";color:var(--color-text-disabled);margin-right:var(--space-2)}.breadcrumb a{color:var(--color-primary)}.breadcrumb [aria-current=page]{color:var(--color-text);font-weight:var(--font-medium)}.recommendations-section{margin-top:var(--space-8)}.recommendations-section__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6)}.recommendations-section__title{font-size:var(--text-xl);font-weight:var(--font-semibold);color:var(--color-text)}.recommendations-section__subtitle{font-size:var(--text-sm);color:var(--color-text-secondary);margin-top:var(--space-1)}.ai-placeholder{display:flex;align-items:center;gap:var(--space-2);font-size:var(--text-xs);color:var(--color-text-secondary);background:var(--color-warning-light);border:1px dashed var(--color-warning);border-radius:var(--radius-md);padding:var(--space-2) var(--space-3);margin-bottom:var(--space-4)}.form-group{margin-bottom:var(--space-5)}.form-group label{display:flex;align-items:center;gap:var(--space-1)}@media (max-width: 767px){.card{padding:var(--space-4)}.login-form-panel{padding:var(--space-8) var(--space-4)}.tile-grid{grid-template-columns:1fr 1fr}.filter-panel,.metadata-panel{position:static}}@media (max-width: 480px){.tile-grid{grid-template-columns:1fr}.btn--lg{padding:var(--space-3) var(--space-6);font-size:var(--text-base)}}.app-shell{min-height:100vh}.site-header__nav{display:none;align-items:center;gap:var(--space-1)}@media (min-width: 768px){.site-header__nav{display:flex}}.site-header__nav-link{padding:var(--space-2) var(--space-3);font-size:var(--text-sm);font-weight:var(--font-medium);color:#ffffffd9;text-decoration:none;border-radius:var(--radius-md);transition:background-color var(--transition-fast),color var(--transition-fast)}.site-header__nav-link:hover{background:#ffffff1f;color:var(--color-text-inverse);text-decoration:none}.site-header__nav-link[aria-current=page]{background:var(--color-primary-dark);color:var(--color-text-inverse);font-weight:var(--font-semibold)}.site-header__nav-link:focus-visible{outline:3px solid var(--color-text-inverse);outline-offset:2px}.header-user-link{text-decoration:none}.header-user-link:hover .header-user__avatar{background:#ffffff59}.header-user-link:focus-visible{outline:3px solid var(--color-text-inverse);outline-offset:2px;border-radius:var(--radius-full)}.not-found-page{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-4);max-width:34rem;margin:var(--space-12) auto;text-align:left;padding:0 var(--space-4)}.home-hero{display:flex;flex-direction:column;gap:var(--space-6);max-width:42rem;margin:var(--space-8) auto;padding:0 var(--space-4)}.home-hero__actions{display:flex;gap:var(--space-3);flex-wrap:wrap}.home-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(14rem,1fr));gap:var(--space-4);margin-top:var(--space-4)}.dashboard-grid{display:grid;grid-template-columns:1fr 20rem;gap:var(--space-6);align-items:start}@media (max-width: 1023px){.dashboard-grid{grid-template-columns:1fr}}.skeleton{display:block;border-radius:var(--radius-sm);background:linear-gradient(90deg,var(--color-divider) 25%,var(--color-bg) 37%,var(--color-divider) 63%);background-size:400% 100%;animation:skeleton-loading 1.4s ease infinite}.skeleton-stat{width:3.5rem;height:var(--text-4xl);margin-bottom:var(--space-2)}.skeleton-line{width:70%;height:var(--text-xs)}@keyframes skeleton-loading{0%{background-position:100% 50%}to{background-position:0 50%}}@media (prefers-reduced-motion: reduce){.skeleton{animation:none;background:var(--color-divider)}}.activity-timeline{list-style:none;padding:0;position:relative}.activity-timeline:before{content:"";position:absolute;left:.875rem;top:0;bottom:0;width:2px;background:var(--color-divider)}.activity-event{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-2) 0;position:relative}.activity-event__dot{width:1.75rem;height:1.75rem;border-radius:var(--radius-full);background:var(--color-primary-light);border:2px solid var(--color-primary);flex-shrink:0;z-index:1}.activity-event__content{flex:1;padding-top:2px}.activity-event__title{font-size:var(--text-sm);font-weight:var(--font-medium);color:var(--color-text)}.activity-event__date{font-size:var(--text-xs);color:var(--color-text-secondary)}.catalog-layout{display:grid;grid-template-columns:18rem 1fr;gap:var(--space-6);align-items:start}@media (max-width: 1023px){.catalog-layout{grid-template-columns:1fr}.filter-panel{position:static}}.filter-accordion{list-style:none;padding:0;margin:0}.filter-accordion>li{border-bottom:1px solid var(--color-divider)}.filter-accordion>li:last-child{border-bottom:none}.filter-group-details{margin:0}.filter-group-details summary{display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-2);font-size:var(--text-sm);font-weight:var(--font-semibold);color:var(--color-text);cursor:pointer;list-style:none;-webkit-user-select:none;user-select:none;border-radius:var(--radius-sm);transition:background-color var(--transition-fast);min-height:2.5rem}.filter-group-details summary::-webkit-details-marker{display:none}.filter-group-details summary:hover{background:var(--color-primary-light)}.filter-group-details summary:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:-2px}.filter-group-details summary:after{content:"▼";font-size:.625rem;color:var(--color-text-secondary);transition:transform var(--transition-fast)}.filter-group-details[open] summary:after{transform:rotate(180deg)}.filter-group-body{border:none;padding:var(--space-2) var(--space-2) var(--space-3);margin:0;display:flex;flex-direction:column;gap:var(--space-1)}.catalog-grid .course-card__footer{display:flex;align-items:center;gap:var(--space-2);flex-wrap:wrap}.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5)}@media (max-width: 1280px){.catalog-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.catalog-grid{grid-template-columns:1fr}}.category-tree{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-1)}.category-tree__details{margin:0}.category-tree__summary{display:flex;align-items:center;padding:var(--space-2) var(--space-3);border-radius:var(--radius-sm);cursor:pointer;list-style:none;-webkit-user-select:none;user-select:none;color:var(--color-text-secondary);font-size:var(--text-sm);min-height:2.25rem;transition:background-color var(--transition-fast),color var(--transition-fast)}.category-tree__summary::-webkit-details-marker{display:none}.category-tree__summary:hover{background:var(--color-primary-light);color:var(--color-primary)}.category-tree__summary:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:-2px}.category-tree__details[data-active=true]>.category-tree__summary{background:var(--color-primary-light);color:var(--color-primary);font-weight:var(--font-semibold)}.repository-table-actions{display:flex;gap:var(--space-2);flex-wrap:wrap;align-items:center}.pdf-viewer{background:var(--color-surface);border:1px solid var(--color-divider);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}.pdf-viewer__placeholder{min-height:20rem;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-4);color:var(--color-text-secondary);padding:var(--space-8);text-align:center;background:#f8f9fa}.pdf-viewer__actions{display:flex;justify-content:center;padding:var(--space-4);border-top:1px solid var(--color-divider)}.version-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--space-2)}.version-item{padding:var(--space-3);border:1px solid var(--color-divider);border-radius:var(--radius-md);background:var(--color-surface)}.version-item--current{border-color:var(--color-primary);background:var(--color-primary-light)}.version-item__header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);margin-bottom:var(--space-1)}.version-item__number{background:none;border:none;font:inherit;padding:0;cursor:pointer;font-size:var(--text-sm);font-weight:var(--font-bold);color:var(--color-primary)}.version-item__number:focus-visible{outline:3px solid var(--color-border-focus);outline-offset:2px}.version-item__meta{font-size:var(--text-xs);color:var(--color-text-secondary);margin:0 0 var(--space-2)}.version-item__actions{display:flex;gap:var(--space-2);flex-wrap:wrap}.doc-actions{display:flex;flex-wrap:wrap;gap:var(--space-3);margin-bottom:var(--space-4)}.doc-layout{display:grid;grid-template-columns:1fr;gap:var(--space-5);align-items:start}@media (min-width: 1024px){.doc-layout{grid-template-columns:16rem 1fr 18rem}}