:root{--bg-primary: #FFFFFF;--bg-secondary: #FBFBFA;--bg-surface: #F7F6F3;--bg-hover: #EFEFEF;--bg-active: #E8E8E6;--text-primary: #373530;--text-secondary: #6B6B65;--text-muted: #9B9B97;--text-disabled: #BFBFBA;--accent: #2383E2;--accent-hover: #0B6BCB;--accent-muted: rgba(35, 131, 226, .12);--accent-subtle: rgba(35, 131, 226, .06);--success: #548164;--success-muted: #EEF3ED;--warning: #CC782F;--warning-muted: #F8ECDF;--error: #C4554D;--error-muted: #FAECEC;--color-gray: #787774;--color-gray-bg: #F1F1EF;--color-brown: #976D57;--color-brown-bg: #F3EEEE;--color-orange: #CC782F;--color-orange-bg: #F8ECDF;--color-yellow: #C29343;--color-yellow-bg: #FAF3DD;--color-green: #548164;--color-green-bg: #EEF3ED;--color-blue: #487CA5;--color-blue-bg: #E9F3F7;--color-purple: #8A67AB;--color-purple-bg: #F6F3F8;--color-pink: #B35488;--color-pink-bg: #F9F2F5;--color-red: #C4554D;--color-red-bg: #FAECEC;--border-subtle: rgba(55, 53, 48, .06);--border-default: rgba(55, 53, 48, .12);--border-strong: rgba(55, 53, 48, .18);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-focus: 0 0 0 3px rgba(35, 131, 226, .2);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;--font-mono: "SF Mono", "Fira Code", "Consolas", monospace;--text-xs: .6875rem;--text-sm: .8125rem;--text-base: .9375rem;--text-lg: 1.0625rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--weight-normal: 400;--weight-medium: 500;--weight-semibold: 600;--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;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 20px;--radius-full: 9999px;--sidebar-width: 240px;--sidebar-collapsed: 72px;--content-max-width: 1200px;--header-height: 64px;--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease}[data-theme=dark]{--bg-primary: #191919;--bg-secondary: #1F1F1F;--bg-surface: #252525;--bg-hover: #2E2E2E;--bg-active: #373737;--text-primary: #E6E6E6;--text-secondary: #9B9B9B;--text-muted: #6F6F6F;--text-disabled: #4A4A4A;--accent: #3B9EFF;--accent-hover: #5AAFFF;--accent-muted: rgba(59, 158, 255, .18);--accent-subtle: rgba(59, 158, 255, .09);--success: #6FA876;--success-muted: rgba(111, 168, 118, .18);--warning: #E89B5F;--warning-muted: rgba(232, 155, 95, .18);--error: #E57373;--error-muted: rgba(229, 115, 115, .18);--color-gray: #9B9B9B;--color-gray-bg: rgba(155, 155, 155, .18);--color-brown: #B8917A;--color-brown-bg: rgba(184, 145, 122, .18);--color-orange: #E89B5F;--color-orange-bg: rgba(232, 155, 95, .18);--color-yellow: #E6C56C;--color-yellow-bg: rgba(230, 197, 108, .18);--color-green: #6FA876;--color-green-bg: rgba(111, 168, 118, .18);--color-blue: #68A8D8;--color-blue-bg: rgba(104, 168, 216, .18);--color-purple: #A98FC8;--color-purple-bg: rgba(169, 143, 200, .18);--color-pink: #D881A8;--color-pink-bg: rgba(216, 129, 168, .18);--color-red: #E57373;--color-red-bg: rgba(229, 115, 115, .18);--border-subtle: rgba(255, 255, 255, .06);--border-default: rgba(255, 255, 255, .12);--border-strong: rgba(255, 255, 255, .18);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .7);--shadow-focus: 0 0 0 3px rgba(59, 158, 255, .3)}[data-theme=dark] .main-header{background:#252525d9}[data-theme=dark] .form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%239B9B9B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E")}[data-theme=dark] .form-check-input:checked{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23191919' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E")}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-family);font-size:var(--text-base);line-height:1.5;color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;overflow-x:hidden}#root{min-height:100vh}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}input,select,textarea{font-family:inherit;font-size:inherit}ul,ol{list-style:none}img{max-width:100%;display:block}.app{display:flex;min-height:100vh}.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-width);height:100vh;background:var(--bg-secondary);border-right:1px solid 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ease}.results-mobile-progress-bar.excellent{background:linear-gradient(90deg,var(--success),var(--color-green))}.results-mobile-progress-bar.good{background:linear-gradient(90deg,var(--color-blue),var(--accent))}.results-mobile-progress-bar.average{background:linear-gradient(90deg,var(--warning),var(--color-orange))}.results-mobile-progress-bar.poor{background:linear-gradient(90deg,var(--error),var(--color-red))}.results-mobile-info-row{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) 0;border-top:1px solid var(--border-subtle)}.results-mobile-info-label{font-size:var(--text-xs);color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-weight:var(--weight-medium)}.results-mobile-info-value{font-size:var(--text-sm);color:var(--text-primary);font-weight:var(--weight-medium)}.badge{display:inline-flex;align-items:center;gap:var(--space-1);padding:var(--space-1) 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var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-5)}.stat-label{font-size:var(--text-sm);color:var(--text-muted);margin-bottom:var(--space-1)}.stat-value{font-size:var(--text-2xl);font-weight:var(--weight-semibold);color:var(--text-primary);letter-spacing:-.02em}.stat-change{display:inline-flex;align-items:center;gap:var(--space-1);font-size:var(--text-xs);font-weight:var(--weight-medium);margin-top:var(--space-2)}.stat-change.positive{color:var(--success)}.stat-change.negative{color:var(--error)}.calendar-strip{display:flex;gap:var(--space-2);overflow-x:auto;padding:var(--space-2) var(--space-2);scroll-padding-inline:var(--space-2);scrollbar-width:none}.calendar-strip::-webkit-scrollbar{display:none}.calendar-day{flex-shrink:0;width:56px;padding:var(--space-3) var(--space-2);background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);text-align:center;cursor:pointer;transition:all var(--transition-fast)}.calendar-day:hover{background:var(--bg-hover);border-color:var(--border-default)}.calendar-day.today{border-color:var(--accent)}.calendar-day.selected{background:var(--accent-subtle);border-color:var(--accent)}.calendar-day-weekday{font-size:var(--text-xs);color:var(--text-muted);text-transform:uppercase;margin-bottom:var(--space-1)}.calendar-day-number{font-size:var(--text-lg);font-weight:var(--weight-semibold);color:var(--text-primary)}.calendar-day.selected .calendar-day-number{color:var(--accent)}.calendar-day-dot{width:4px;height:4px;background:var(--accent);border-radius:var(--radius-full);margin:var(--space-1) auto 0}.schedule-grid{display:grid;grid-template-columns:1fr 320px;gap:var(--space-5)}.schedule-loading-banner{border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-3) 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solid var(--error);outline-offset:-3px}.room-schedule-lesson.attendance-complete{outline:3px solid var(--success);outline-offset:-3px}.room-schedule-lesson.attendance-incomplete{outline:3px solid var(--error);outline-offset:-3px}.lesson-card-inner{border-left:3px solid var(--accent);padding-left:var(--space-3);margin-left:calc(-1 * var(--space-4))}.lesson-card-header{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-2);margin-bottom:var(--space-2)}.lesson-time{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-muted)}.lesson-title{font-size:var(--text-base);font-weight:var(--weight-semibold);color:var(--text-primary);flex:1 1 160px;min-width:0}.lesson-meta{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-sm);color:var(--text-muted);flex-wrap:wrap}.lesson-meta-item{display:flex;align-items:center;gap:var(--space-1)}.lesson-status{margin-left:auto;white-space:nowrap}.detail-panel{background:var(--bg-secondary);border:1px solid 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var(--transition-fast)}.attendance-btn:hover{border-color:var(--border-default)}.attendance-btn.present{background:var(--success-muted);border-color:var(--success);color:var(--success)}.attendance-btn.late{background:var(--warning-muted);border-color:var(--warning);color:var(--warning)}.attendance-btn.absent{background:var(--error-muted);border-color:var(--error);color:var(--error)}.empty-state{text-align:center;padding:var(--space-10) var(--space-6)}.empty-state-icon{width:48px;height:48px;margin:0 auto var(--space-4);color:var(--text-muted);opacity:.5}.empty-state-title{font-size:var(--text-base);font-weight:var(--weight-medium);color:var(--text-primary);margin-bottom:var(--space-2)}.empty-state-description{font-size:var(--text-sm);color:var(--text-muted);max-width:300px;margin:0 auto}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;visibility:hidden;transition:all var(--transition-base)}.modal-overlay.open{opacity:1;visibility:visible}.modal{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);width:100%;max-width:480px;max-height:85vh;overflow:hidden;display:flex;flex-direction:column;transform:scale(.95) translateY(10px);transition:transform var(--transition-base)}.modal-overlay.open .modal{transform:scale(1) translateY(0)}.modal-header{padding:var(--space-5);border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:var(--text-lg);font-weight:var(--weight-semibold);color:var(--text-primary)}.modal-close{width:32px;height:32px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:all var(--transition-fast)}.modal-close:hover{background:var(--bg-surface);color:var(--text-primary)}.modal-body{padding:var(--space-5);overflow-y:auto;flex:1;min-height:0}.modal-footer{padding:var(--space-4) var(--space-5);border-top:1px solid var(--border-subtle);display:flex;justify-content:flex-end;gap:var(--space-3)}.mobile-lesson-modal{display:flex;flex-direction:column;gap:var(--space-4)}.mobile-lesson-summary{display:flex;flex-direction:column;gap:var(--space-1)}.mobile-lesson-actions{display:flex;flex-direction:column;gap:var(--space-2)}.mobile-lesson-actions .btn{justify-content:center;gap:var(--space-2)}.segment{padding:var(--space-2) var(--space-4);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-secondary);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.segment:disabled{opacity:.5;cursor:not-allowed}.skeleton{background:linear-gradient(90deg,var(--bg-surface) 0%,var(--bg-hover) 50%,var(--bg-surface) 100%);background-size:200% 100%;animation:skeleton-shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{height:14px;margin-bottom:var(--space-2)}.skeleton-text:last-child{width:60%}.skeleton-heading{height:20px;width:50%;margin-bottom:var(--space-3)}.skeleton-avatar{width:40px;height:40px;border-radius:var(--radius-full)}.skeleton-inline{margin-bottom:0}.skeleton-pill{height:16px;width:90px;border-radius:var(--radius-full)}.skeleton-date{height:12px;width:80px}.skeleton-short{width:70%}.skeleton-cell{width:100%}.skeleton-cell-sm{width:60%}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}.animate-fade-in{animation:fadeIn var(--transition-base) ease-out}.animate-slide-up{animation:slideUp var(--transition-base) ease-out}.animate-slide-in{animation:slideIn var(--transition-base) 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var(--space-2);z-index:100;padding-bottom:env(safe-area-inset-bottom,0)}.mobile-nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-1);padding:var(--space-2);border-radius:var(--radius-md);color:var(--text-secondary);transition:all var(--transition-fast);flex:1;max-width:80px}.mobile-nav-item.active{color:var(--accent);background:var(--accent-subtle)}.mobile-nav-icon{width:24px;height:24px;display:flex;align-items:center;justify-content:center}.mobile-nav-label{font-size:10px;font-weight:var(--weight-medium);text-align:center;white-space:nowrap}.mobile-nav-item.active:after{content:"";position:absolute;top:4px;width:4px;height:4px;background:var(--accent);border-radius:var(--radius-full)}.mobile-nav-item{position:relative}[data-theme=dark] .mobile-bottom-nav{background:var(--bg-surface);border-top-color:var(--border-default)}[data-theme=dark] .mobile-nav-item.active{color:var(--text-primary);background:var(--bg-active)}@media(min-width:1025px){.sidebar{width:var(--sidebar-width)}.main{margin-left:var(--sidebar-width)}.dashboard-grid,.schedule-grid{grid-template-columns:1fr 360px}.card-body{padding:var(--space-6)}.table th:nth-child(n+4),.table td:nth-child(n+4){display:table-cell}}@media(min-width:1440px){:root{--content-max-width: 1320px}.main-header{padding:0 var(--space-8)}.main-content{padding:var(--space-8)}}@media(max-width:1024px)and (min-width:769px){.sidebar{width:var(--sidebar-collapsed)}.user-profile-info{display:none}.user-profile{justify-content:center;padding:var(--space-4)}.sidebar-logo-text,.nav-item 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