:root{--bg:#DCEEFF;--text:#1C2A38;--panel:rgba(220,238,255,0.85);--panel-light:rgba(220,238,255,0.4);--panel-medium:rgba(220,238,255,0.6);--panel-heavy:rgba(220,238,255,0.9);--border:#B4CCE0;--hover:#A8C7E4;--input:#EEF6FC;--topbar:#BFD8EC;--selection:#DCEEFF;--placeholder:#A8C7E4;--primary:#c9c9c9;--primary-hover:#5F7285;--accent:#000000;--accent-hover:#5F7285;--calendar-selection:#97b3cf;--success:#10b981;--danger:#ef4444;--danger-hover:#dc2626;--warning:#f59e0b;--info:#06b6d4;--cal-selected:var(--primary);--cal-square:var(--accent);--glass-clear:rgba(220,238,255,0.05);--glass-light:rgba(220,238,255,0.15);--glass-medium:rgba(220,238,255,0.35);--glass-heavy:rgba(220,238,255,0.65);--glass-solid:rgba(220,238,255,0.85);--glass-invisible:rgba(0,0,0,0);--backdrop-blur:blur(20px);--backdrop-blur-medium:blur(12px);--backdrop-blur-light:blur(8px);--backdrop-blur-subtle:blur(4px);--font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;--transition:all 0.3s cubic-bezier(0.4,0,0.2,1);--transition-slow:all 0.5s cubic-bezier(0.4,0,0.2,1);--transition-fast:all 0.15s cubic-bezier(0.4,0,0.2,1);--transition-bounce:all 0.4s cubic-bezier(0.68,-0.55,0.265,1.55);--shadow-soft:0 4px 20px rgba(0,0,0,0.08);--shadow-medium:0 8px 30px rgba(0,0,0,0.12);--shadow-strong:0 15px 45px rgba(0,0,0,0.2);--shadow-glow:0 0 30px rgba(110,131,150,0.3);--z-background:-2;--z-overlay:-1;--z-content:1;--z-sidebar:50;--z-header:100;--z-tooltip:10000;--z-modal:20000}html[data-theme=dark]{--bg:#001E2F;--text:#FFFFFF;--panel:rgba(20,20,20,0.7);--panel-light:rgba(0,30,47,0.4);--panel-medium:rgba(0,30,47,0.6);--panel-heavy:rgba(0,30,47,0.9);--border:#627886;--hover:#2E2E2E;--input:#013655;--topbar:#001E2F;--selection:#001E2F;--placeholder:#627886;--primary:#979797;--primary-hover:#4A6A88;--accent:#627886;--accent-hover:#4A6A88;--cal-selected:#4A6A88;--cal-square:#627886;--glass-clear:rgba(0,30,47,0.05);--glass-light:rgba(0,30,47,0.15);--glass-medium:rgba(0,30,47,0.35);--glass-heavy:rgba(0,30,47,0.65);--glass-solid:rgba(0,30,47,0.85);--glass-invisible:rgba(0,0,0,0);--shadow-soft:0 4px 20px rgba(255,255,255,0.05),0 2px 8px rgba(98,120,134,0.15);--shadow-medium:0 8px 30px rgba(255,255,255,0.08),0 4px 15px rgba(98,120,134,0.25);--shadow-strong:0 15px 45px rgba(255,255,255,0.12),0 8px 25px rgba(98,120,134,0.4);--shadow-glow:0 0 30px rgba(98,120,134,0.6),0 0 15px rgba(255,255,255,0.1);--shadow-button-hover:0 8px 25px rgba(98,120,134,0.4),0 0 20px rgba(255,255,255,0.1);--shadow-primary-hover:0 0 20px rgba(98,120,134,0.5),0 0 40px rgba(98,120,134,0.3)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font-family);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}.dashboard-background,.login-background{position:fixed;top:0;left:0;right:0;bottom:0;background-size:cover;background-position:50%;background-repeat:no-repeat;background-attachment:fixed;z-index:var(--z-background)}.dashboard-background{opacity:1}.dashboard-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:var(--glass-clear);z-index:var(--z-overlay);pointer-events:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.6rem 1.1rem;border:1px solid var(--glass-light);border-radius:8px;background:var(--glass-medium);color:var(--text);font-family:var(--font-family);font-weight:500;font-size:.875rem;text-decoration:none;cursor:pointer;transition:var(--transition);position:relative;overflow:hidden;user-select:none;backdrop-filter:var(--backdrop-blur-light);box-shadow:var(--shadow-soft);min-height:36px}.btn:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);transition:left .5s ease;pointer-events:none}.btn:hover:not(:disabled):before{left:100%}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.btn:hover:not(:disabled){transform:translateY(-2px) scale(1.02);box-shadow:var(--shadow-button-hover,var(--shadow-medium));background:var(--glass-heavy);border-color:var(--primary)}.btn:active:not(:disabled){transform:translateY(0) scale(.98);transition:var(--transition-fast)}.btn--primary{background:linear-gradient(135deg,var(--primary) 0,var(--accent) 100%);color:white;border:none;box-shadow:var(--shadow-medium);backdrop-filter:var(--backdrop-blur)}.btn--primary:hover:not(:disabled){box-shadow:var(--shadow-primary-hover,var(--shadow-glow));transform:translateY(-3px) scale(1.02)}.btn--glass{background:var(--glass-medium);border:1px solid var(--glass-light);backdrop-filter:var(--backdrop-blur);color:var(--text)}.btn--glass:hover:not(:disabled){background:var(--glass-heavy);border-color:var(--primary);box-shadow:var(--shadow-glow)}.btn--danger{background:var(--danger);color:white;border:none}.btn--danger:hover:not(:disabled){background:var(--danger-hover);box-shadow:0 0 20px rgba(239,68,68,.4)}.form-field{display:flex;flex-direction:column;gap:.35rem;margin-bottom:.85rem}.form-field label{font-weight:600;color:var(--text);font-size:.875rem;margin-bottom:.25rem}.form-input,.form-select,.form-textarea{padding:.65rem .85rem;border:1px solid var(--glass-light);border-radius:8px;background:var(--glass-light);color:var(--text);font-size:.875rem;transition:var(--transition);font-family:inherit;backdrop-filter:var(--backdrop-blur-light);box-shadow:var(--shadow-soft);min-height:38px}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--primary);background:var(--glass-medium);box-shadow:0 0 0 3px rgba(110,131,150,.1),var(--shadow-medium);transform:translateY(-1px)}.form-input::placeholder,.form-textarea::placeholder{color:var(--placeholder);opacity:.95}.dashboard-container{min-height:100vh;background:transparent;color:var(--text);position:relative}.dashboard-header{display:flex;justify-content:space-between;align-items:center;padding:.5rem 2rem;background:var(--glass-heavy);border-bottom:1px solid var(--glass-light);backdrop-filter:var(--backdrop-blur);position:sticky;top:0;z-index:var(--z-header);box-shadow:var(--shadow-soft);height:65px;min-height:65px;max-height:65px;gap:2rem}.header-left{flex:0 0 auto}.header-right{flex:0 0 auto;display:flex;align-items:center;gap:1.5rem}.user-info{text-align:right;animation:fadeInRight .6s ease-out;display:flex;flex-direction:column;align-items:flex-end;gap:.5rem}.welcome-text{font-size:.875rem;opacity:.9;font-weight:500}.user-roles{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:flex-end}.dashboard-header:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,transparent,var(--glass-clear),transparent);opacity:0;transition:opacity .3s ease;pointer-events:none}.dashboard-header:hover:before{opacity:1}.dashboard-title{background:linear-gradient(135deg,var(--primary),var(--accent));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent;font-weight:700;font-size:1.75rem}.role-badge{padding:.25rem .75rem;background:var(--glass-medium);color:var(--text);border:1px solid var(--glass-light);border-radius:20px;font-size:.75rem;font-weight:500;backdrop-filter:var(--backdrop-blur-light);margin:0 .25rem;transition:var(--transition)}.role-badge:hover{background:var(--primary);color:white;transform:scale(1.05)}.dashboard-layout{display:flex;min-height:calc(100vh - 65px)}.dashboard-main{flex:1;overflow:hidden;transition:margin-left var(--transition);backdrop-filter:var(--backdrop-blur-subtle)}.dashboard-main.with-sidebar{margin-left:60px}.dashboard-home{padding:1rem;max-width:1200px;margin:0 auto;animation:fadeInUp .8s ease-out}.welcome-section{text-align:center;margin-bottom:2rem;padding:1.5rem;background:var(--glass-light);border-radius:20px;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft);border:1px solid var(--glass-light)}.welcome-content h2{font-size:2.5rem;margin:0 0 1rem;background:linear-gradient(135deg,var(--primary),var(--accent));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent;animation:slideInDown .8s ease-out}.subtitle{font-size:1.125rem;opacity:.8;margin:0;animation:fadeIn 1s ease-out .3s both}.modules-grid{display:grid;gap:1.25rem;animation:fadeInUp .8s ease-out .2s both}.module-group{background:var(--glass-light);border:1px solid var(--glass-medium);border-radius:16px;overflow:hidden;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft);transition:var(--transition);position:relative}.module-group:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0;transition:opacity .3s ease}.module-group:hover:before{opacity:1}.module-group:hover{transform:translateY(-4px);box-shadow:var(--shadow-medium);background:var(--glass-medium)}.module-tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;padding:1rem;background:var(--glass-clear);backdrop-filter:var(--backdrop-blur-light)}.module-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;padding:1.5rem;background:var(--glass-light);border:1px solid var(--glass-medium);border-radius:12px;cursor:pointer;transition:var(--transition-bounce);min-height:140px;aspect-ratio:1.2;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft);position:relative;overflow:hidden}.module-tile:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,var(--glass-clear),var(--glass-light));opacity:0;transition:opacity .3s ease;pointer-events:none}.module-tile:hover:before{opacity:1}.module-tile:hover{background:var(--glass-medium);border-color:var(--primary);transform:translateY(-8px) scale(1.03);box-shadow:var(--shadow-strong)}.tile-icon{display:flex;align-items:center;justify-content:center;width:64px;height:64px;background:transparent;border:none;border-radius:0;transition:var(--transition-bounce);z-index:1}.module-tile:hover .tile-icon{transform:scale(1.15) rotate(5deg)}.tile-label{font-weight:600;text-align:center;color:var(--text);font-size:1rem;z-index:1;transition:var(--transition)}.module-tile:hover .tile-label{transform:translateY(-2px)}.sidebar{position:fixed;left:0;top:65px;bottom:0;width:60px;background:var(--glass-heavy);border-right:1px solid var(--glass-light);z-index:var(--z-sidebar);backdrop-filter:var(--backdrop-blur);transition:var(--transition);overflow:visible;box-shadow:var(--shadow-soft)}.sidebar.expanded{width:240px;box-shadow:var(--shadow-medium)}.sidebar-content{padding:1rem 0;height:100%;overflow-y:auto;width:100%}.sidebar-content,.sidebar-content>*{overflow-x:hidden!important}.sidebar-content::-webkit-scrollbar{width:4px}.sidebar-content::-webkit-scrollbar-track{background:transparent}.sidebar-content::-webkit-scrollbar-thumb{background:var(--glass-medium);border-radius:2px}.btn--sidebar{justify-content:flex-start;background:transparent;border:1px solid transparent;border-radius:10px;padding:.75rem 1rem;backdrop-filter:none;text-align:left;width:100%;position:relative}.btn--sidebar,.btn--sidebar span{transition:var(--transition);overflow:hidden}.btn--sidebar span{white-space:nowrap;text-overflow:ellipsis}.btn--sidebar:hover:not(:disabled){background:var(--glass-medium);border-color:var(--glass-light);transform:translateX(4px);backdrop-filter:var(--backdrop-blur-light);box-shadow:var(--shadow-soft)}.btn--sidebar:hover span{transform:translateX(-2px)}@keyframes marquee{0%{transform:translateX(0)}to{transform:translateX(-100%)}}.btn--sidebar span.text-overflow{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;animation:none}.btn--sidebar:hover span.text-overflow{display:inline-block;overflow:visible;text-overflow:clip;animation:marquee 12s linear infinite;will-change:transform;padding-right:20px}.btn--sidebar:hover span.text-overflow:after{content:attr(data-full-text);position:absolute;left:100%;padding-left:20px;white-space:nowrap}.sidebar-tooltip{position:fixed;background:var(--panel-heavy);border:1px solid var(--glass-medium);border-radius:8px;padding:.5rem .75rem;white-space:nowrap;font-size:.875rem;box-shadow:var(--shadow-medium);z-index:var(--z-tooltip);backdrop-filter:var(--backdrop-blur);pointer-events:none;color:var(--text);font-weight:500;transform:translateY(-50%)}.module-container{height:100%;display:flex;flex-direction:column;animation:fadeInRight .6s ease-out}.module-header{display:flex;justify-content:space-between;align-items:center;padding:1rem;background:var(--glass-medium);border-bottom:1px solid var(--glass-light);backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft)}.module-header-minimal{position:relative;height:0;width:100%}.btn-close-minimal{transition:var(--transition)}.btn-close-minimal:hover{background:var(--danger)!important;border-color:var(--danger)!important;box-shadow:var(--shadow-glow)}.module-title h2{margin:0 0 .5rem;font-size:1.75rem;background:linear-gradient(135deg,var(--primary),var(--accent));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent}.module-breadcrumb{font-size:.875rem;opacity:.7;display:flex;align-items:center;gap:.5rem}.separator{opacity:.5}.module-actions{display:flex;gap:1rem}.action-btn{padding:.75rem 1.5rem;border-radius:10px;font-size:.875rem;font-weight:500;transition:var(--transition);backdrop-filter:var(--backdrop-blur-light)}.back-btn{background:var(--glass-medium);border:1px solid var(--glass-light);color:var(--text)}.back-btn:hover{background:var(--glass-heavy);transform:translateX(-2px)}.close-btn{background:var(--danger);border:none;color:white}.close-btn:hover{background:var(--danger-hover);box-shadow:0 0 15px rgba(239,68,68,.4)}.module-content{flex:1;padding:1rem;overflow-y:auto;background:var(--glass-clear);backdrop-filter:var(--backdrop-blur-subtle)}.content-panel{background:var(--glass-light);border:1px solid var(--glass-medium);border-radius:16px;padding:1.5rem;margin-bottom:1.5rem;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft);transition:var(--transition)}.content-panel:hover{background:var(--glass-medium);box-shadow:var(--shadow-medium);transform:translateY(-2px)}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid var(--glass-light)}.panel-title{font-size:1.125rem;font-weight:600;margin:0;background:linear-gradient(135deg,var(--primary),var(--accent));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent}.data-table{width:100%;border-collapse:collapse;background:var(--glass-light);border-radius:12px;overflow:hidden;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft)}.data-table td,.data-table th{padding:1rem;text-align:left;border-bottom:1px solid var(--glass-light);transition:var(--transition)}.data-table th{background:var(--glass-medium);font-weight:600;color:var(--text);position:sticky;top:0;z-index:10;backdrop-filter:var(--backdrop-blur)}.data-table tr:hover td{background:var(--glass-medium);transform:scale(1.01)}.data-table tr:last-child td{border-bottom:none}.loading-spinner{width:40px;height:40px;border:3px solid var(--glass-light);border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;padding:2rem;background:var(--glass-medium);border-radius:16px;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInLeft{0%{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}@keyframes fadeInRight{0%{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}@keyframes slideInDown{0%{opacity:0;transform:translateY(-50px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes shimmer{0%{transform:translateX(-100%)}to{transform:translateX(100%)}}.animate-fade-in-up{animation:fadeInUp .6s ease-out}.animate-fade-in-down{animation:fadeInDown .6s ease-out}.animate-fade-in-left{animation:fadeInLeft .6s ease-out}.animate-fade-in-right{animation:fadeInRight .6s ease-out}.animate-pulse{animation:pulse 2s infinite}.glass-panel{background:var(--glass-light);border:1px solid var(--glass-medium);border-radius:16px;backdrop-filter:var(--backdrop-blur);box-shadow:var(--shadow-soft)}.glass-card{background:var(--glass-medium);border:1px solid var(--glass-light);border-radius:12px;backdrop-filter:var(--backdrop-blur-light);transition:var(--transition)}.glass-card:hover{background:var(--glass-heavy);transform:translateY(-2px);box-shadow:var(--shadow-medium)}@media (max-width:1200px){.module-tiles{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}}@media (max-width:768px){.dashboard-header{padding:.75rem 1rem;flex-direction:column;gap:1rem;align-items:stretch;height:auto;min-height:80px}.header-left,.header-right{justify-content:center}.module-tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;padding:1rem}.module-tile{min-height:140px;padding:1.5rem}.dashboard-main.with-sidebar{margin-left:0}.sidebar{transform:translateX(-100%)}.sidebar.expanded{transform:translateX(0)}.dashboard-header .user-info{display:none!important}}@media (max-width:480px){.welcome-content h2{font-size:2rem}.module-tiles{grid-template-columns:1fr;gap:1rem}.module-tile{min-height:120px;padding:1rem}.dashboard-home,.module-content{padding:1rem}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.7}}.progress-tooltip{position:absolute;background:rgba(0,0,0,.9);color:white;padding:6px 10px;border-radius:6px;font-size:12px;font-weight:500;white-space:nowrap;z-index:10000;pointer-events:none;backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);box-shadow:0 4px 12px rgba(0,0,0,.4);display:none;transform:translateX(-50%)}.video-tile-16-9{aspect-ratio:16/9;width:100%;height:auto}@media (max-width:1024px) and (pointer:coarse){.btn{min-height:44px;min-width:44px}.edit-mode-overlay,.resize-handle{display:none!important}}@media (max-width:768px){.btn,.btn-mini{min-height:48px;min-width:48px;padding:.75rem 1rem;font-size:.9375rem}.dashboard-main{padding:1rem}.content-panel{padding:1rem!important}.presets-title{font-size:.875rem}.preset-row{grid-template-columns:1fr!important;gap:12px!important}.module-content{overflow-x:auto}body{font-size:16px}input,select,textarea{font-size:16px;min-height:44px}}@media (max-width:896px) and (orientation:landscape){.dashboard-header{padding:.5rem 1rem}.module-header{flex-direction:row;flex-wrap:wrap}}@media (hover:none) and (pointer:coarse){.module-tile:hover{transform:none}a,button,input[type=checkbox]{min-height:48px;min-width:48px}}@keyframes spin{to{transform:rotate(1turn)}}.students-filter-grid{display:grid;grid-template-columns:minmax(180px,1fr) minmax(180px,1fr) minmax(180px,1fr) minmax(260px,2fr) auto;gap:.5rem;align-items:end}@media (max-width:1100px){.students-filter-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}.responsive-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;margin-bottom:8px}@media (max-width:768px){.responsive-grid{grid-template-columns:1fr}}