@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";:root{--color-primary: #0A2E5D;--color-accent: #D86532;--color-bg: #F8FAFC;--color-card: #FFFFFF;--color-card-hover: #F1F5F9;--color-border: #E2E8F0;--color-text-primary: #1E293B;--color-text-secondary: #475569;--color-text-inverse: #FFFFFF;--color-success: #16A34A;--color-warning: #F59E0B;--color-error: #DC2626;--color-success-bg: #DCFCE7;--color-warning-bg: #FEF3C7;--color-error-bg: #FEE2E2;--font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-size-h1: clamp(1.75rem, 2vw + 1rem, 2.25rem);--font-size-h2: clamp(1.25rem, 1.5vw + .6rem, 1.75rem);--font-size-h3: clamp(1.125rem, 1.2vw + .4rem, 1.5rem);--font-size-body: clamp(.95rem, .8vw + .4rem, 1rem);--font-size-primary-text: clamp(1rem, 1vw + .4rem, 1.125rem);--font-size-secondary-text: clamp(.875rem, .6vw + .3rem, .95rem);--font-size-label: clamp(.75rem, .5vw + .3rem, .875rem);--font-size-table: clamp(.85rem, .6vw + .35rem, .95rem);--font-size-button: clamp(.875rem, .6vw + .35rem, 1rem);--font-size-caption: clamp(.75rem, .5vw + .3rem, .85rem);--font-size-tiny: clamp(.65rem, .4vw + .25rem, .75rem);--line-height-tight: 1.2;--line-height-normal: 1.5;--line-height-loose: 1.8;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--shadow-card: 0 2px 6px rgba(0, 0, 0, .05)}.teacher-login-container{width:100vw;height:100vh;margin:0;padding:0;overflow:hidden;background-size:cover;background-position:center;background-repeat:no-repeat;display:flex;align-items:center;justify-content:center;position:relative;font-family:var(--font-family)}.teacher-login-overlay{position:absolute;inset:0;background:#0a2e5d8c;-webkit-backdrop-filter:brightness(.8);backdrop-filter:brightness(.8);z-index:0}.teacher-login-card{position:relative;z-index:1;width:100%;max-width:400px;padding:2.5rem;border-radius:var(--radius-lg);background:#ffffff26;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.25);box-shadow:0 8px 40px #00000040;text-align:center;color:var(--color-text-inverse);transition:transform .3s ease,box-shadow .3s ease}.teacher-login-logo{width:110px;margin-bottom:1rem}.teacher-login-title{font-size:var(--font-size-h2);color:var(--color-text-inverse);margin-bottom:.4rem;font-weight:700}.teacher-login-subtitle{font-size:var(--font-size-secondary-text);color:#ffffffd9;margin-bottom:2rem}.teacher-login-form{display:flex;flex-direction:column;gap:1rem}.input-group{text-align:left}.input-group label{display:block;font-size:var(--font-size-label);color:#ffffffe6;margin-bottom:.3rem}.input-group input{width:360px;padding:.75rem 1rem;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.25);background:#ffffff26;color:var(--color-text-inverse);font-size:var(--font-size-body);transition:all .3s ease}.input-group input::placeholder{color:#ffffffb3}.input-group input:focus{border-color:var(--color-accent);background:#ffffff40;outline:none}.password-wrapper{position:relative;display:flex;align-items:center}.toggle-password{position:absolute;right:.9rem;background:none;border:none;color:#ffffffbf;cursor:pointer;font-size:1rem;display:flex;align-items:center;justify-content:center;transition:color .2s ease}.toggle-password:hover{color:var(--color-accent)}.login-options{text-align:right;margin-top:.25rem}.forgot-password{background:none;border:none;color:var(--color-accent);font-size:var(--font-size-tiny);cursor:pointer;text-decoration:underline;transition:color .2s ease}.forgot-password:hover{color:var(--color-text-inverse)}.teacher-login-button{width:100%;margin-top:1.5rem;padding:.9rem;border:none;border-radius:var(--radius-md);font-size:var(--font-size-button);font-weight:600;cursor:pointer;background-color:var(--color-accent);color:var(--color-text-inverse);box-shadow:0 4px 15px #d865324d;transition:all .3s ease}.teacher-login-button:hover:not(:disabled){background-color:var(--color-primary);transform:translateY(-2px);box-shadow:0 6px 18px #0a2e5d66}.teacher-login-button:disabled{background:#ffffff4d;color:#ffffffb3;cursor:not-allowed;transform:none;box-shadow:none}@media(max-width:480px){.teacher-login-card{padding:1.75rem;width:90%}.teacher-login-title{font-size:var(--font-size-h3)}.teacher-login-subtitle{font-size:var(--font-size-label)}.teacher-login-button{padding:.75rem}}html,body{margin:0;padding:0;overflow-x:hidden}:root{--toastify-color-light: #fff;--toastify-color-dark: #121212;--toastify-color-info: #3498db;--toastify-color-success: #07bc0c;--toastify-color-warning: #f1c40f;--toastify-color-error: hsl(6, 78%, 57%);--toastify-color-transparent: rgba(255, 255, 255, .7);--toastify-icon-color-info: var(--toastify-color-info);--toastify-icon-color-success: var(--toastify-color-success);--toastify-icon-color-warning: var(--toastify-color-warning);--toastify-icon-color-error: var(--toastify-color-error);--toastify-container-width: fit-content;--toastify-toast-width: 320px;--toastify-toast-offset: 16px;--toastify-toast-top: max(var(--toastify-toast-offset), env(safe-area-inset-top));--toastify-toast-right: max(var(--toastify-toast-offset), env(safe-area-inset-right));--toastify-toast-left: max(var(--toastify-toast-offset), env(safe-area-inset-left));--toastify-toast-bottom: max(var(--toastify-toast-offset), env(safe-area-inset-bottom));--toastify-toast-background: #fff;--toastify-toast-padding: 14px;--toastify-toast-min-height: 64px;--toastify-toast-max-height: 800px;--toastify-toast-bd-radius: 6px;--toastify-toast-shadow: 0px 4px 12px rgba(0, 0, 0, .1);--toastify-font-family: sans-serif;--toastify-z-index: 9999;--toastify-text-color-light: #757575;--toastify-text-color-dark: #fff;--toastify-text-color-info: #fff;--toastify-text-color-success: #fff;--toastify-text-color-warning: #fff;--toastify-text-color-error: #fff;--toastify-spinner-color: #616161;--toastify-spinner-color-empty-area: #e0e0e0;--toastify-color-progress-light: linear-gradient(to right, #4cd964, #5ac8fa, #007aff, #34aadc, #5856d6, #ff2d55);--toastify-color-progress-dark: #bb86fc;--toastify-color-progress-info: var(--toastify-color-info);--toastify-color-progress-success: var(--toastify-color-success);--toastify-color-progress-warning: var(--toastify-color-warning);--toastify-color-progress-error: var(--toastify-color-error);--toastify-color-progress-bgo: 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0;position:relative;touch-action:none;width:var(--toastify-toast-width);min-height:var(--toastify-toast-min-height);box-sizing:border-box;margin-bottom:1rem;padding:var(--toastify-toast-padding);border-radius:var(--toastify-toast-bd-radius);box-shadow:var(--toastify-toast-shadow);max-height:var(--toastify-toast-max-height);font-family:var(--toastify-font-family);z-index:0;display:flex;flex:1 auto;align-items:center;word-break:break-word}@media only screen and 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Toastify__slideOutUp{0%{transform:translate3d(0,var(--y),0)}to{visibility:hidden;transform:translate3d(0,-500px,0)}}.Toastify__slide-enter--top-left,.Toastify__slide-enter--bottom-left{animation-name:Toastify__slideInLeft}.Toastify__slide-enter--top-right,.Toastify__slide-enter--bottom-right{animation-name:Toastify__slideInRight}.Toastify__slide-enter--top-center{animation-name:Toastify__slideInDown}.Toastify__slide-enter--bottom-center{animation-name:Toastify__slideInUp}.Toastify__slide-exit--top-left,.Toastify__slide-exit--bottom-left{animation-name:Toastify__slideOutLeft;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-right,.Toastify__slide-exit--bottom-right{animation-name:Toastify__slideOutRight;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--top-center{animation-name:Toastify__slideOutUp;animation-timing-function:ease-in;animation-duration:.3s}.Toastify__slide-exit--bottom-center{animation-name:Toastify__slideOutDown;animation-timing-function:ease-in;animation-duration:.3s}@keyframes 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.sidebar-logo{display:none}.sidebar-toggle{position:absolute;top:28px;right:-14px;background:var(--color-accent);color:var(--color-text-inverse);border:none;border-radius:50%;padding:8px;cursor:pointer;box-shadow:0 4px 8px #d8653266;transition:all .2s ease;z-index:10}.sidebar-toggle:hover{transform:scale(1.1);box-shadow:0 6px 12px #d8653280}@media(max-width:768px){.sidebar{left:-100%;transition:left .3s ease;width:260px}.sidebar.mobile-open{left:0}.sidebar-overlay{position:fixed;inset:0;background:#0009;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:99}.mobile-close-btn{position:absolute;top:18px;right:18px;background:var(--color-card-hover);border:1px solid var(--color-border);color:var(--color-primary);border-radius:var(--radius-sm);padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.mobile-close-btn:hover{background:var(--color-bg)}.sidebar-toggle.desktop-only{display:none}}@media(min-width:769px){.mobile-close-btn{display:none}}.header{position:fixed;top:0;left:260px;right:0;height:64px;background-color:var(--color-card);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-card);display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:90;transition:left .3s ease;font-family:var(--font-family)}.header-left .header-title{color:var(--color-primary);font-size:var(--font-size-h3);font-weight:600;margin:0}.header-right{display:flex;align-items:center;gap:16px}.language-switcher{position:relative;display:flex;align-items:center;gap:6px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:6px 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#0000000f}.user-avatar{width:36px;height:36px;border-radius:50%;object-fit:cover}.user-info{display:flex;flex-direction:column;line-height:1.2}.user-name{font-weight:600;font-size:var(--font-size-body);color:var(--color-primary)}.user-role{font-size:var(--font-size-caption);color:var(--color-text-secondary)}.menu-btn{display:none;background:none;border:none;color:var(--color-primary);cursor:pointer;margin-right:12px}.header.collapsed{left:80px}@media(max-width:768px){.menu-btn{display:inline-flex;align-items:center;justify-content:center}}@media(max-width:768px){.header{left:0;padding:0 16px}.header-title{font-size:1rem}.user-info{display:none}}.lang-btn{display:flex;align-items:center;gap:6px;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:6px 10px;color:var(--color-primary);font-weight:500;font-size:var(--font-size-label);cursor:pointer;position:relative;transition:all .2s ease}.lang-btn:hover{background:var(--color-card-hover)}.flag-icon{font-size:18px;line-height:1}.lang-chevron{color:var(--color-text-secondary);margin-left:2px}.lang-dropdown{position:absolute;top:42px;right:0;background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-sm);box-shadow:var(--shadow-card);display:flex;flex-direction:column;min-width:140px;z-index:100;overflow:hidden}.lang-option{display:flex;align-items:center;gap:8px;padding:8px 12px;background:transparent;border:none;color:var(--color-primary);font-size:var(--font-size-label);cursor:pointer;transition:all .2s 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64px)}.page-wrapper{border-radius:0;box-shadow:none}}.courses-container{font-family:var(--font-family);background-color:var(--color-bg);min-height:100vh;padding:2.5rem;color:var(--color-text-primary);transition:background-color .3s ease;max-width:1400px;margin:0 auto}.courses-header{margin-bottom:2rem}.courses-title{font-size:var(--font-size-h2);font-weight:700;color:var(--color-text-primary);margin-bottom:1.5rem;margin-top:0%;letter-spacing:-.02em}.courses-tabs{display:flex;gap:.75rem;flex-wrap:wrap}.tab-button{padding:.625rem 1.5rem;border-radius:var(--radius-md);border:1.5px solid var(--color-border);background-color:var(--color-card);color:var(--color-text-primary);font-size:var(--font-size-button);font-weight:500;cursor:pointer;transition:all .2s 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.5rem;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;text-overflow:ellipsis}.course-category{font-size:var(--font-size-secondary-text);color:var(--color-text-secondary);margin-bottom:.75rem;margin-top:0%;font-weight:500}.progress-bar{height:8px;border-radius:var(--radius-sm);background-color:var(--color-border);overflow:hidden;margin-top:.5rem;position:relative}.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-accent) 0%,var(--color-primary) 100%);transition:width .4s ease;border-radius:var(--radius-sm);position:relative}.progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0%,rgba(255,255,255,.3) 50%,transparent 100%);animation:shimmer 2s infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-text{font-size:var(--font-size-tiny);color:var(--color-text-secondary);margin-top:0%;font-weight:500}.course-dates{font-size:var(--font-size-caption);color:var(--color-text-secondary);margin:0%;padding-top:.75rem;border-top:1px solid var(--color-border);font-weight:500;display:flex;align-items:center;gap:.5rem}@media(max-width:768px){.courses-container{padding:1.5rem}.courses-grid{grid-template-columns:1fr;gap:1.25rem}.courses-title{font-size:1.75rem}}@media(max-width:480px){.tab-button{padding:.5rem 1rem;font-size:.875rem}.courses-banner{height:120px}.courses-banner-text{font-size:2rem}}.course-details-container{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text-primary);min-height:100vh;display:flex;flex-direction:column}.course-back-nav{display:flex;align-items:center;gap:.75rem;padding-bottom:1.5rem;background-color:var(--color-card);border-bottom:1px solid var(--color-border);z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.back-btn{padding:.625rem 1.25rem;border-radius:var(--radius-md);border:1.5px solid var(--color-border);background-color:var(--color-bg);color:var(--color-text-primary);cursor:pointer}.course-header{display:flex;padding:2rem;border-radius:1rem;box-shadow:0 2px 8px #0000001a;margin:1.5rem 0;background:#fff}.header-left{flex:1;min-width:300px}.course-title{font-size:2.2rem;font-weight:700;color:var(--color-primary);margin-bottom:.75rem;letter-spacing:-.02em;line-height:1.2}.course-meta{font-size:var(--font-size-secondary-text);color:var(--color-text-secondary);display:flex;flex-wrap:wrap;align-items:center;gap:.75rem}.meta-label{font-weight:600;color:var(--color-text-primary)}.header-right{display:flex;align-items:center}.date-pill{background-color:var(--color-bg);border:1.5px solid var(--color-border);border-radius:var(--radius-md);padding:.75rem 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0;background:#fff}.fade-in{opacity:1;transform:translateY(0);transition:opacity .3s ease,transform .3s ease}.fade-out{opacity:0;transform:translateY(10px);transition:opacity .2s ease,transform .2s ease}.tab-section{animation:fadeIn .3s ease}.section-header{display:flex;gap:1rem;align-items:center;margin-bottom:2rem;padding-bottom:1rem}.tab-section h2{font-size:var(--font-size-h2);font-weight:700;color:var(--color-primary);margin:0;letter-spacing:-.02em}.group-count,.resource-count,.homework-count{background-color:var(--color-bg);padding:.375rem .875rem;border-radius:var(--radius-sm);font-size:var(--font-size-label);font-weight:600;color:var(--color-text-secondary);border:1px solid var(--color-border)}.course-description{font-size:var(--font-size-primary-text);line-height:1.7;color:var(--color-text-secondary);margin-bottom:3rem}.teacher-section{margin-top:2rem}.teacher-section h3{font-size:var(--font-size-h3);margin-bottom:1.5rem;color:var(--color-primary);font-weight:600}.teacher-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.25rem}.teacher-card{display:flex;align-items:center;gap:1rem;padding:1.25rem;background-color:var(--color-card);border:1.5px solid var(--color-border);border-radius:var(--radius-lg);transition:all .2s ease}.teacher-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000014;border-color:var(--color-accent)}.teacher-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:var(--color-text-inverse);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:1.125rem;flex-shrink:0}.teacher-info{flex:1}.teacher-name{font-weight:600;color:var(--color-text-primary);margin-bottom:.25rem;font-size:var(--font-size-primary-text)}.teacher-email{font-size:var(--font-size-secondary-text);color:var(--color-text-secondary);margin:0}.groups-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem}.group-card{background-color:var(--color-card);border:1.5px solid var(--color-border);border-radius:var(--radius-lg);padding:1.5rem;transition:all .25s ease;box-shadow:0 2px 4px #0000000a}.group-card:hover{transform:translateY(-4px);box-shadow:0 8px 16px #0000001a;border-color:var(--color-accent)}.group-card-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--color-border)}.group-avatar{width:52px;height:52px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--color-primary),var(--color-accent));color:var(--color-text-inverse);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.5rem;flex-shrink:0}.group-title-section{flex:1}.group-name{font-size:var(--font-size-h3);font-weight:600;color:var(--color-text-primary);margin:0 0 .25rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.group-id{font-size:var(--font-size-caption);color:var(--color-text-secondary);font-family:monospace}.mode-badge{padding:.375rem .875rem;border-radius:var(--radius-sm);font-size:var(--font-size-label);font-weight:600;text-transform:uppercase;letter-spacing:.03em}.mode-badge.online{background-color:var(--color-success-bg);color:var(--color-success)}.mode-badge.offline{background-color:var(--color-warning-bg);color:var(--color-warning)}.group-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.25rem}.stat-item{display:flex;flex-direction:column;align-items:center;padding:.75rem;background-color:var(--color-bg);border-radius:var(--radius-md);border:1px solid var(--color-border)}.stat-label{font-size:var(--font-size-tiny);color:var(--color-text-secondary);font-weight:600;letter-spacing:.05em;margin-bottom:.25rem}.stat-value{font-size:1.5rem;font-weight:700;color:var(--color-primary)}.card-actions{display:flex;gap:.75rem}.action-btn{flex:1;padding:.75rem 1.25rem;border-radius:var(--radius-md);border:none;font-size:var(--font-size-button);font-weight:600;cursor:pointer;transition:all .2s ease}.action-btn-primary{background-color:transparent;color:var(--color-text-primary);border:1.5px solid var(--color-border)}.action-btn-primary:hover{background-color:var(--color-card-hover);border-color:var(--color-accent);color:var(--color-accent)}.action-btn-secondary{background-color:var(--color-primary);color:var(--color-text-inverse);box-shadow:0 2px 4px #0000001a}.action-btn-secondary:hover{background-color:var(--color-accent);transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.empty-state{color:var(--color-text-secondary);font-style:italic;margin:0}.course-details-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:5rem 2rem;gap:1rem}.course-details-loading p{font-size:var(--font-size-primary-text);color:var(--color-text-secondary)}.course-details-error{text-align:center;padding:5rem 2rem;font-size:var(--font-size-primary-text);color:var(--color-text-secondary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.course-back-nav,.course-tabs{padding:1rem 1.5rem}.course-header{padding:2rem 1.5rem;flex-direction:column}.course-title{font-size:1.5rem}.course-tab-content{padding:1.5rem}.groups-grid,.teacher-grid{grid-template-columns:1fr}.group-stats{grid-template-columns:repeat(3,1fr)}.homework-header{flex-direction:column;align-items:flex-start}}.profile-container{max-width:1000px;margin:0 auto;padding:24px;background-color:var(--color-bg);color:var(--color-text-primary);font-family:var(--font-family)}.profile-container *,.profile-container *:before,.profile-container *:after{box-sizing:border-box}.profile-heading{font-size:var(--font-size-h2);font-weight:600;color:var(--color-primary);margin-bottom:24px;text-align:left}.profile-form.two-columns{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;background:var(--color-card);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-card);padding:24px}.form-group{display:flex;flex-direction:column}.form-group label{font-weight:500;color:var(--color-text-secondary);margin-bottom:6px;font-size:var(--font-size-label)}.form-group input,.form-group select{padding:10px 12px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:var(--font-size-body);background:var(--color-bg);color:var(--color-text-primary);transition:border-color .2s ease,background-color .2s ease}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--color-accent);background-color:var(--color-card-hover)}.form-group input[disabled],.form-group select[disabled]{background:#f1f5f9;color:var(--color-text-secondary);cursor:not-allowed}.full-width{grid-column:span 2;display:flex;justify-content:flex-end;margin-top:12px}.edit-profile-button,.save-profile-button{background-color:var(--color-accent);color:var(--color-text-inverse);padding:10px 20px;border-radius:var(--radius-sm);border:none;cursor:pointer;font-weight:600;font-size:var(--font-size-button);transition:all .25s ease;box-shadow:var(--shadow-card)}.edit-profile-button:hover,.save-profile-button:hover{background-color:#b24f26;transform:translateY(-1px)}.save-profile-button{background-color:var(--color-primary)}.save-profile-button:hover{background-color:#072549}.profile-loading,.profile-error{text-align:center;font-size:var(--font-size-body);color:var(--color-text-secondary);padding:40px 0}@media(max-width:768px){.profile-container{padding:16px}.profile-form.two-columns{grid-template-columns:1fr;gap:16px;padding:16px}.full-width{grid-column:span 1;justify-content:center}.profile-heading{font-size:var(--font-size-h3);text-align:center}}@media(max-width:480px){.form-group input,.form-group select{font-size:var(--font-size-secondary-text);padding:8px 10px}.edit-profile-button,.save-profile-button{width:100%;padding:12px;font-size:var(--font-size-body)}}.group-details-container{font-family:var(--font-family);background-color:var(--color-bg);color:var(--color-text-primary);min-height:100vh;padding:0}.group-header-section{background-color:var(--color-card);border-bottom:1px solid var(--color-border);padding:1.5rem 2.5rem;display:flex;align-items:center;gap:1.5rem}.back-to-groups-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1rem;border-radius:var(--radius-md);border:none;background-color:var(--color-text-secondary);color:var(--color-text-inverse);font-size:var(--font-size-button);font-weight:500;cursor:pointer;transition:all .2s ease}.back-to-groups-btn:hover{background-color:var(--color-text-primary);transform:translate(-2px)}.group-title-info{display:flex;flex-direction:column;gap:.5rem}.group-page-title{font-size:1.25rem;font-weight:700;color:var(--color-text-primary);margin:0;letter-spacing:-.02em}.group-meta-info{font-size:var(--font-size-secondary-text);color:var(--color-text-secondary);margin:0}.group-tabs{display:flex;gap:0;background-color:var(--color-card);border-bottom:1px solid var(--color-border);padding:1rem 2.5rem;overflow-x:auto;position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.group-tab-btn{padding:.75rem 1.75rem;border:none;background-color:transparent;border-radius:var(--radius-md);font-size:var(--font-size-button);color:var(--color-text-secondary);cursor:pointer;transition:all .2s ease;font-weight:500;border-bottom:3px solid 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minmax(0,1fr);gap:1.25rem}.ts-groups-panel{background-color:var(--color-card);border-radius:1rem;padding:.9rem;border:1px solid var(--color-border);box-shadow:0 10px 30px #0f172a1f;display:flex;flex-direction:column;gap:.75rem}.ts-groups-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.ts-groups-title{margin:0;font-size:var(--font-size-primary-text);font-weight:700}.ts-groups-count{padding:.3rem .7rem;border-radius:999px;font-size:.75rem;background-color:#e7c9ab;color:var(--color-text-primary)}.ts-groups-list{display:flex;flex-direction:column;gap:.4rem;max-height:calc(100vh - 260px);overflow-y:auto}.ts-group-item{width:100%;text-align:left;border-radius:.9rem;border:1px solid transparent;background-color:#f9fafb;padding:.6rem .7rem;cursor:pointer;transition:all .15s ease}.ts-group-item:hover{background-color:#eef2ff}.ts-group-item-active{border-color:var(--color-primary);background-color:#eef3ff;box-shadow:0 0 0 1px #2563eb40}.ts-group-name{font-size:var(--font-size-secondary-text);font-weight:600;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ts-group-course{font-size:.75rem;color:var(--color-text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ts-main-panel{background-color:#fff;border-radius:1rem;padding:.9rem;border:1px solid var(--color-border);box-shadow:0 10px 30px #0f172a1f;display:flex;flex-direction:column;gap:1rem;overflow:hidden}.ts-main-header{display:flex;justify-content:space-between;align-items:center}.ts-main-title{margin:0;font-size:var(--font-size-primary-text);font-weight:700}.ts-main-subtitle{margin:.25rem 0 0;font-size:.8rem;color:var(--color-text-secondary)}.ts-timetable-wrapper{margin-top:.5rem;border-radius:1rem;overflow:auto;border:1px solid var(--color-border)}.ts-timetable{width:100%;border-collapse:collapse;min-width:780px;font-size:.8rem}.ts-timetable thead{background-color:#0f172a;color:#f9fafb}.ts-timetable th,.ts-timetable td{padding:.6rem .4rem;text-align:center;border-right:1px solid rgba(148,163,184,.3)}.ts-timetable th:last-child,.ts-timetable td:last-child{border-right:none}.ts-time-col{width:120px;background-color:#0f172a}.ts-day-col{min-width:110px}.ts-day-name{font-weight:600}.ts-day-short{font-size:.7rem;opacity:.8}.ts-time-cell{background-color:#f9fafb;font-weight:600}.ts-session-cell{height:64px;background-color:#fff}.ts-session-filled{background-color:#eff6ff}.ts-session-subject{font-weight:600}.ts-session-teacher{font-size:.7rem;color:var(--color-text-secondary)}.ts-break-cell{background:linear-gradient(180deg,#fee2e2,#fecaca);position:relative}.ts-break-dot{width:10px;height:10px;border-radius:999px;background-color:#ef4444;margin:0 auto .25rem}.ts-break-title{font-size:.8rem;color:#b91c1c}.ts-main-empty{flex:1;display:flex;align-items:center;justify-content:center}.ts-muted{color:var(--color-text-secondary);font-size:.85rem}@media(max-width:960px){.ts-layout{grid-template-columns:1fr}}