html{height:100%;--mat-sys-background: light-dark(#f9faf3, #121410);--mat-sys-error: light-dark(#ba1a1a, #ffb4ab);--mat-sys-error-container: light-dark(#ffdad6, #93000a);--mat-sys-inverse-on-surface: light-dark(#f1f1eb, #2f312d);--mat-sys-inverse-primary: light-dark(#02e600, #026e00);--mat-sys-inverse-surface: light-dark(#2f312d, #e2e3dc);--mat-sys-on-background: light-dark(#1a1c18, #e2e3dc);--mat-sys-on-error: light-dark(#ffffff, #690005);--mat-sys-on-error-container: light-dark(#93000a, #ffdad6);--mat-sys-on-primary: light-dark(#ffffff, #013a00);--mat-sys-on-primary-container: light-dark(#015300, #77ff61);--mat-sys-on-primary-fixed: light-dark(#002200, #002200);--mat-sys-on-primary-fixed-variant: light-dark(#015300, #015300);--mat-sys-on-secondary: light-dark(#ffffff, #263422);--mat-sys-on-secondary-container: light-dark(#3c4b37, #d7e8cd);--mat-sys-on-secondary-fixed: light-dark(#121f0e, #121f0e);--mat-sys-on-secondary-fixed-variant: light-dark(#3c4b37, #3c4b37);--mat-sys-on-surface: light-dark(#1a1c18, #e2e3dc);--mat-sys-on-surface-variant: light-dark(#43483f, #dfe4d7);--mat-sys-on-tertiary: light-dark(#ffffff, #502400);--mat-sys-on-tertiary-container: light-dark(#723600, #ffdcc7);--mat-sys-on-tertiary-fixed: light-dark(#311300, #311300);--mat-sys-on-tertiary-fixed-variant: light-dark(#723600, #723600);--mat-sys-outline: light-dark(#73796e, #8d9387);--mat-sys-outline-variant: light-dark(#c3c8bc, #43483f);--mat-sys-primary: light-dark(#026e00, #02e600);--mat-sys-primary-container: light-dark(#77ff61, #015300);--mat-sys-primary-fixed: light-dark(#77ff61, #77ff61);--mat-sys-primary-fixed-dim: light-dark(#02e600, #02e600);--mat-sys-scrim: light-dark(#000000, #000000);--mat-sys-secondary: light-dark(#54634d, #bbcbb2);--mat-sys-secondary-container: light-dark(#d7e8cd, #3c4b37);--mat-sys-secondary-fixed: light-dark(#d7e8cd, #d7e8cd);--mat-sys-secondary-fixed-dim: light-dark(#bbcbb2, #bbcbb2);--mat-sys-shadow: light-dark(#000000, #000000);--mat-sys-surface: light-dark(#f9faf3, #121410);--mat-sys-surface-bright: light-dark(#f9faf3, #383a35);--mat-sys-surface-container: light-dark(#eeeee7, #1e201c);--mat-sys-surface-container-high: light-dark(#e8e9e1, #282b26);--mat-sys-surface-container-highest: light-dark(#e2e3dc, #333531);--mat-sys-surface-container-low: light-dark(#f3f4ed, #1a1c18);--mat-sys-surface-container-lowest: light-dark(#ffffff, #0c0f0b);--mat-sys-surface-dim: light-dark(#dadbd3, #121410);--mat-sys-surface-tint: light-dark(#026e00, #02e600);--mat-sys-surface-variant: light-dark(#dfe4d7, #43483f);--mat-sys-tertiary: light-dark(#964900, #ffb787);--mat-sys-tertiary-container: light-dark(#ffdcc7, #723600);--mat-sys-tertiary-fixed: light-dark(#ffdcc7, #ffdcc7);--mat-sys-tertiary-fixed-dim: light-dark(#ffb787, #ffb787);--mat-sys-neutral-variant20: #2c3229;--mat-sys-neutral10: #1a1c18;--mat-sys-level0: 0px 0px 0px 0px rgba(0, 0, 0, .2), 0px 0px 0px 0px rgba(0, 0, 0, .14), 0px 0px 0px 0px rgba(0, 0, 0, .12);--mat-sys-level1: 0px 2px 1px -1px rgba(0, 0, 0, .2), 0px 1px 1px 0px rgba(0, 0, 0, .14), 0px 1px 3px 0px rgba(0, 0, 0, .12);--mat-sys-level2: 0px 3px 3px -2px rgba(0, 0, 0, .2), 0px 3px 4px 0px rgba(0, 0, 0, .14), 0px 1px 8px 0px rgba(0, 0, 0, .12);--mat-sys-level3: 0px 3px 5px -1px rgba(0, 0, 0, .2), 0px 6px 10px 0px rgba(0, 0, 0, .14), 0px 1px 18px 0px rgba(0, 0, 0, .12);--mat-sys-level4: 0px 5px 5px -3px rgba(0, 0, 0, .2), 0px 8px 10px 1px rgba(0, 0, 0, .14), 0px 3px 14px 2px rgba(0, 0, 0, .12);--mat-sys-level5: 0px 7px 8px -4px rgba(0, 0, 0, .2), 0px 12px 17px 2px rgba(0, 0, 0, .14), 0px 5px 22px 4px rgba(0, 0, 0, .12);--mat-sys-body-large: 400 1rem / 1.5rem Be Vietnam Pro;--mat-sys-body-large-font: Be Vietnam Pro;--mat-sys-body-large-line-height: 1.5rem;--mat-sys-body-large-size: 1rem;--mat-sys-body-large-tracking: .031rem;--mat-sys-body-large-weight: 400;--mat-sys-body-medium: 400 .875rem / 1.25rem Be Vietnam Pro;--mat-sys-body-medium-font: Be Vietnam Pro;--mat-sys-body-medium-line-height: 1.25rem;--mat-sys-body-medium-size: .875rem;--mat-sys-body-medium-tracking: .016rem;--mat-sys-body-medium-weight: 400;--mat-sys-body-small: 400 .75rem / 1rem Be Vietnam Pro;--mat-sys-body-small-font: Be Vietnam Pro;--mat-sys-body-small-line-height: 1rem;--mat-sys-body-small-size: .75rem;--mat-sys-body-small-tracking: .025rem;--mat-sys-body-small-weight: 400;--mat-sys-display-large: 400 3.562rem / 4rem Be Vietnam Pro;--mat-sys-display-large-font: Be Vietnam Pro;--mat-sys-display-large-line-height: 4rem;--mat-sys-display-large-size: 3.562rem;--mat-sys-display-large-tracking: -.016rem;--mat-sys-display-large-weight: 400;--mat-sys-display-medium: 400 2.812rem / 3.25rem Be Vietnam Pro;--mat-sys-display-medium-font: Be Vietnam Pro;--mat-sys-display-medium-line-height: 3.25rem;--mat-sys-display-medium-size: 2.812rem;--mat-sys-display-medium-tracking: 0;--mat-sys-display-medium-weight: 400;--mat-sys-display-small: 400 2.25rem / 2.75rem Be Vietnam Pro;--mat-sys-display-small-font: Be Vietnam Pro;--mat-sys-display-small-line-height: 2.75rem;--mat-sys-display-small-size: 2.25rem;--mat-sys-display-small-tracking: 0;--mat-sys-display-small-weight: 400;--mat-sys-headline-large: 400 2rem / 2.5rem Be Vietnam Pro;--mat-sys-headline-large-font: Be Vietnam Pro;--mat-sys-headline-large-line-height: 2.5rem;--mat-sys-headline-large-size: 2rem;--mat-sys-headline-large-tracking: 0;--mat-sys-headline-large-weight: 400;--mat-sys-headline-medium: 400 1.75rem / 2.25rem Be Vietnam Pro;--mat-sys-headline-medium-font: Be Vietnam Pro;--mat-sys-headline-medium-line-height: 2.25rem;--mat-sys-headline-medium-size: 1.75rem;--mat-sys-headline-medium-tracking: 0;--mat-sys-headline-medium-weight: 400;--mat-sys-headline-small: 400 1.5rem / 2rem Be Vietnam Pro;--mat-sys-headline-small-font: Be Vietnam Pro;--mat-sys-headline-small-line-height: 2rem;--mat-sys-headline-small-size: 1.5rem;--mat-sys-headline-small-tracking: 0;--mat-sys-headline-small-weight: 400;--mat-sys-label-large: 500 .875rem / 1.25rem Be Vietnam Pro;--mat-sys-label-large-font: Be Vietnam Pro;--mat-sys-label-large-line-height: 1.25rem;--mat-sys-label-large-size: .875rem;--mat-sys-label-large-tracking: .006rem;--mat-sys-label-large-weight: 500;--mat-sys-label-large-weight-prominent: 700;--mat-sys-label-medium: 500 .75rem / 1rem Be Vietnam Pro;--mat-sys-label-medium-font: Be Vietnam Pro;--mat-sys-label-medium-line-height: 1rem;--mat-sys-label-medium-size: .75rem;--mat-sys-label-medium-tracking: .031rem;--mat-sys-label-medium-weight: 500;--mat-sys-label-medium-weight-prominent: 700;--mat-sys-label-small: 500 .688rem / 1rem Be Vietnam Pro;--mat-sys-label-small-font: Be Vietnam Pro;--mat-sys-label-small-line-height: 1rem;--mat-sys-label-small-size: .688rem;--mat-sys-label-small-tracking: .031rem;--mat-sys-label-small-weight: 500;--mat-sys-title-large: 400 1.375rem / 1.75rem Be Vietnam Pro;--mat-sys-title-large-font: Be Vietnam Pro;--mat-sys-title-large-line-height: 1.75rem;--mat-sys-title-large-size: 1.375rem;--mat-sys-title-large-tracking: 0;--mat-sys-title-large-weight: 400;--mat-sys-title-medium: 500 1rem / 1.5rem Be Vietnam Pro;--mat-sys-title-medium-font: Be Vietnam Pro;--mat-sys-title-medium-line-height: 1.5rem;--mat-sys-title-medium-size: 1rem;--mat-sys-title-medium-tracking: .009rem;--mat-sys-title-medium-weight: 500;--mat-sys-title-small: 500 .875rem / 1.25rem Be Vietnam Pro;--mat-sys-title-small-font: Be Vietnam Pro;--mat-sys-title-small-line-height: 1.25rem;--mat-sys-title-small-size: .875rem;--mat-sys-title-small-tracking: .006rem;--mat-sys-title-small-weight: 500;--mat-sys-corner-extra-large: 28px;--mat-sys-corner-extra-large-top: 28px 28px 0 0;--mat-sys-corner-extra-small: 4px;--mat-sys-corner-extra-small-top: 4px 4px 0 0;--mat-sys-corner-full: 9999px;--mat-sys-corner-large: 16px;--mat-sys-corner-large-end: 0 16px 16px 0;--mat-sys-corner-large-start: 16px 0 0 16px;--mat-sys-corner-large-top: 16px 16px 0 0;--mat-sys-corner-medium: 12px;--mat-sys-corner-none: 0;--mat-sys-corner-small: 8px;--mat-sys-dragged-state-layer-opacity: .16;--mat-sys-focus-state-layer-opacity: .12;--mat-sys-hover-state-layer-opacity: .08;--mat-sys-pressed-state-layer-opacity: .12}:root{--color-primary: #4caf50;--color-primary-dark: #2e7d32;--color-primary-light: #81c784;--color-secondary: #ff9800;--color-secondary-dark: #f57c00;--color-secondary-light: #ffb74d;--color-bg: #f5f7fa;--color-card: #ffffff;--color-text: #1a1a2e;--color-text-secondary: #4a5568;--color-muted: #9aa5b4;--color-border: #e2e8f0;--color-success: #48bb78;--color-error: #e53e3e;--color-warning: #ed8936;--color-info: #4299e1;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .08), 0 4px 6px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1), 0 10px 10px rgba(0, 0, 0, .04);--lesson-max-width: 1040px;--kid-text-size: 17px;--kid-question-size: 18px;--kid-title-size: 19px;--kid-line-height: 1.65;--kid-box-padding: 16px 18px;--sidebar-width: 260px;--topbar-height: 72px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{color-scheme:light;background-color:var(--color-bg);color:var(--color-text);font-family:Be Vietnam Pro,Nunito,sans-serif;font-size:.9375rem;line-height:1.6;margin:0;height:100%;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:Nunito,Be Vietnam Pro,sans-serif;font-weight:700;line-height:1.3;color:var(--color-text)}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-dark)}img{max-width:100%;height:auto}.card{background:var(--color-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:1.5rem;transition:box-shadow var(--transition-normal),transform var(--transition-normal)}.card:hover{box-shadow:var(--shadow-lg)}.card--interactive{cursor:pointer}.card--interactive:hover{transform:translateY(-2px);box-shadow:var(--shadow-xl)}.card--interactive:active{transform:translateY(0)}.card--flat{box-shadow:none;border:1px solid var(--color-border)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.625rem 1.25rem;border-radius:var(--radius-full);font-family:Be Vietnam Pro,sans-serif;font-size:.9375rem;font-weight:600;border:none;cursor:pointer;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.btn:disabled{opacity:.6;cursor:not-allowed}.btn--primary{background:var(--color-primary);color:#fff}.btn--primary:hover:not(:disabled){background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:0 4px 12px #4caf5066}.btn--secondary{background:var(--color-secondary);color:#fff}.btn--secondary:hover:not(:disabled){background:var(--color-secondary-dark);transform:translateY(-1px);box-shadow:0 4px 12px #ff980066}.btn--outline{background:transparent;border:2px solid var(--color-primary);color:var(--color-primary)}.btn--outline:hover:not(:disabled){background:#4caf5014}.btn--ghost{background:transparent;color:var(--color-text-secondary)}.btn--ghost:hover:not(:disabled){background:var(--color-bg)}.btn--lg{padding:.875rem 2rem;font-size:1rem}.btn--sm{padding:.375rem .875rem;font-size:.8125rem}.badge{display:inline-flex;align-items:center;gap:.25rem;padding:.25rem .625rem;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;line-height:1}.badge--green{background:#4caf501f;color:var(--color-primary-dark)}.badge--orange{background:#ff98001f;color:var(--color-secondary-dark)}.badge--blue{background:#4299e11f;color:#2b6cb0}.badge--red{background:#e53e3e1f;color:#c53030}.badge--gray{background:#a0aec026;color:#4a5568}.form-field{display:flex;flex-direction:column;gap:.375rem;margin-bottom:1.25rem}.form-field label{font-size:.875rem;font-weight:600;color:var(--color-text-secondary)}.form-field input,.form-field select,.form-field textarea{padding:.75rem 1rem;border:2px solid var(--color-border);border-radius:var(--radius-md);font-family:inherit;font-size:.9375rem;color:var(--color-text);background:#fff;transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #4caf5026}.form-field input::placeholder,.form-field select::placeholder,.form-field textarea::placeholder{color:var(--color-muted)}.form-field input.ng-invalid.ng-touched,.form-field select.ng-invalid.ng-touched,.form-field textarea.ng-invalid.ng-touched{border-color:var(--color-error);box-shadow:0 0 0 3px #e53e3e1a}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-muted)}*{scrollbar-width:thin;scrollbar-color:var(--color-border) transparent}@keyframes pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.08);opacity:.85}}@keyframes pulseRing{0%{transform:scale(.95);box-shadow:0 0 #4caf5080}70%{transform:scale(1);box-shadow:0 0 0 12px #4caf5000}to{transform:scale(.95);box-shadow:0 0 #4caf5000}}@keyframes bounce{0%,to{transform:translateY(0);animation-timing-function:cubic-bezier(.8,0,1,1)}50%{transform:translateY(-12px);animation-timing-function:cubic-bezier(0,0,.2,1)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(24px)}to{opacity:1;transform:translate(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-24px)}to{opacity:1;transform:translate(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes wave{0%,to{transform:scaleY(.4)}50%{transform:scaleY(1)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.animate-fadeIn{animation:fadeIn .4s ease forwards}.animate-slideInRight{animation:slideInRight .35s ease forwards}.animate-bounce{animation:bounce 1s infinite}.animate-pulse{animation:pulse 2s infinite}.animate-spin{animation:spin 1s linear infinite}.text-primary{color:var(--color-primary)!important}.text-secondary-color{color:var(--color-secondary)!important}.text-muted{color:var(--color-muted)!important}.text-success{color:var(--color-success)!important}.text-error{color:var(--color-error)!important}.bg-primary{background-color:var(--color-primary)!important}.bg-secondary{background-color:var(--color-secondary)!important}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-1{gap:.25rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}.gap-4{gap:1rem}.w-full{width:100%}.h-full{height:100%}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.mat-mdc-button,.mat-mdc-raised-button,.mat-mdc-outlined-button{border-radius:var(--radius-full)!important;font-family:Be Vietnam Pro,sans-serif!important;font-weight:600!important;letter-spacing:0!important}.mat-mdc-card{border-radius:var(--radius-lg)!important;box-shadow:var(--shadow-md)!important}.mat-mdc-chip{border-radius:var(--radius-full)!important;font-family:Be Vietnam Pro,sans-serif!important}.progress-bar-container{width:100%;background:var(--color-border);border-radius:var(--radius-full);height:8px;overflow:hidden}.progress-bar-container .progress-bar-fill{height:100%;border-radius:var(--radius-full);background:linear-gradient(90deg,var(--color-primary),var(--color-primary-light));transition:width .6s cubic-bezier(.4,0,.2,1)}.divider{display:flex;align-items:center;gap:1rem;color:var(--color-muted);font-size:.875rem;margin:1rem 0}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--color-border)}@media(max-width:768px){:root{--sidebar-width: 0px}}body.tutor-sidebar-open .main-content{padding-right:380px;transition:padding-right .25s ease}@media(max-width:640px){body.tutor-sidebar-open .main-content{padding-right:0}}
