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24px;--badge-padding-x: 10px;--badge-radius: var(--radius-pill);--status-success-bg: #dcfce7;--status-success-text: #166534;--status-warning-bg: #fef3c7;--status-warning-text: #92400e;--status-danger-bg: #fee2e2;--status-danger-text: #991b1b;--status-info-bg: #e0f2fe;--status-info-text: #075985;--status-muted-bg: #f1f5f9;--status-muted-text: #64748b;--answer-code-bg: #fde68a;--nav-width: 216px;--topbar-height: 64px;--nav-bg: var(--card-bg);--nav-item-hover-bg: var(--color-primary-soft);--nav-item-active-bg: var(--color-primary-soft);--nav-item-active-text: var(--color-primary);--hero-card-bg: var(--hero-bg);--hero-card-border: 1px solid rgba(37, 99, 235, .14);--hero-card-shadow: var(--shadow-md);--status-card-bg: var(--card-bg);--status-card-border: var(--card-border)}:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-active: #1e40af;--color-primary-soft: #dbeafe;--color-secondary: #0f766e;--color-secondary-soft: #ccfbf1;--color-success: #15803d;--color-warning: #b45309;--color-danger: #b91c1c;--color-info: #0369a1;--color-text-primary: #172033;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-text-inverse: #ffffff;--color-border: #cbd5e1;--color-border-soft: #e2e8f0;--color-focus-ring: rgba(37, 99, 235, .28);--page-bg: #f6f8fc;--page-bg-soft: #eef4fa;--card-bg: #ffffff;--card-bg-hover: #f8fafc;--overlay-bg: rgba(15, 23, 42, .48);--hero-bg: linear-gradient(135deg, #eff6ff 0%, #ecfdf5 100%);--login-bg: linear-gradient(135deg, #eff6ff 0%, #f0fdfa 100%);--student-home-bg: #f5f8ff;--teacher-home-bg: #f5faf8;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 8px 24px rgba(15, 23, 42, .08);--shadow-card: 0 4px 16px rgba(15, 23, 42, .06);--shadow-floating: 0 16px 40px rgba(15, 23, 42, .12);--button-primary-bg: var(--color-primary);--button-primary-bg-hover: var(--color-primary-hover);--button-primary-text: var(--color-text-inverse);--button-secondary-bg: var(--color-secondary-soft);--button-secondary-bg-hover: #99f6e4;--button-secondary-text: var(--color-secondary);--button-ghost-bg-hover: var(--color-primary-soft);--button-ghost-text: var(--color-primary);--button-disabled-bg: #e2e8f0;--button-disabled-text: #94a3b8;--status-success-bg: #dcfce7;--status-success-text: #166534;--status-warning-bg: #fef3c7;--status-warning-text: #92400e;--status-danger-bg: #fee2e2;--status-danger-text: #991b1b;--status-info-bg: #e0f2fe;--status-info-text: #075985;--status-muted-bg: #f1f5f9;--status-muted-text: #64748b;--hero-card-bg: var(--hero-bg);--hero-card-border: 1px solid rgba(37, 99, 235, .14);--hero-card-shadow: var(--shadow-md)}[data-theme=clean-edu]{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-active: #1e40af;--color-primary-soft: #dbeafe;--color-secondary: #0f766e;--color-secondary-soft: #ccfbf1;--color-success: #15803d;--color-warning: #b45309;--color-danger: #b91c1c;--color-info: #0369a1;--color-text-primary: #172033;--color-text-secondary: #475569;--color-text-muted: #64748b;--color-text-inverse: #ffffff;--color-border: #cbd5e1;--color-border-soft: #e2e8f0;--color-focus-ring: rgba(37, 99, 235, .28);--page-bg: #f6f8fc;--page-bg-soft: #eef4fa;--card-bg: #ffffff;--card-bg-hover: #f8fafc;--overlay-bg: rgba(15, 23, 42, .48);--hero-bg: linear-gradient(135deg, #eff6ff 0%, #ecfdf5 100%);--login-bg: linear-gradient(135deg, #eff6ff 0%, #f0fdfa 100%);--student-home-bg: #f5f8ff;--teacher-home-bg: #f5faf8;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 8px 24px rgba(15, 23, 42, .08);--shadow-card: 0 4px 16px rgba(15, 23, 42, .06);--shadow-floating: 0 16px 40px rgba(15, 23, 42, .12);--button-primary-bg: var(--color-primary);--button-primary-bg-hover: var(--color-primary-hover);--button-primary-text: var(--color-text-inverse);--button-secondary-bg: var(--color-secondary-soft);--button-secondary-bg-hover: #99f6e4;--button-secondary-text: var(--color-secondary);--button-ghost-bg-hover: var(--color-primary-soft);--button-ghost-text: var(--color-primary);--button-disabled-bg: #e2e8f0;--button-disabled-text: #94a3b8;--status-success-bg: #dcfce7;--status-success-text: #166534;--status-warning-bg: #fef3c7;--status-warning-text: #92400e;--status-danger-bg: #fee2e2;--status-danger-text: #991b1b;--status-info-bg: #e0f2fe;--status-info-text: #075985;--status-muted-bg: #f1f5f9;--status-muted-text: #64748b;--hero-card-bg: var(--hero-bg);--hero-card-border: 1px solid rgba(37, 99, 235, .14);--hero-card-shadow: var(--shadow-md)}html,body{font-family:var(--font-family-base);font-size:var(--font-size-body);line-height:var(--line-height-base);color:var(--color-text-primary);background:var(--page-bg)}.theme-playful-edu,[data-theme=playful-edu]{--color-primary: #14b8a6;--color-primary-hover: #0d9488;--color-primary-active: #0f766e;--color-primary-soft: #ccfbf1;--color-secondary: #f97316;--color-secondary-soft: #ffedd5;--color-success: #16a34a;--color-warning: #d97706;--color-danger: #dc2626;--color-info: #0284c7;--color-text-primary: #3f3528;--color-text-secondary: #6b5d48;--color-text-muted: #93856f;--color-text-inverse: #ffffff;--color-border: #eadfc7;--color-border-soft: #f3ead7;--color-focus-ring: rgba(20, 184, 166, .28);--playful-brand-brown: #7c5637;--playful-title-cream: #fff8dc;--playful-bg-mint: #7cc796;--playful-brand-green: #168240;--playful-button-bg: #fffdf4;--playful-button-text: #6f4a2a;--playful-button-bg-hover: #fffef8;--playful-home-bg: #78c693 url(/assets/playful-home-bg-CzHux1Sq.webp) center / cover repeat;--page-bg: var(--playful-home-bg);--page-bg-soft: rgba(255, 248, 232, .82);--card-bg: #fffdf6;--card-bg-hover: #fff7df;--overlay-bg: rgba(63, 53, 40, .46);--hero-bg: linear-gradient(135deg, #d9fbf4 0%, #fff1c9 58%, #ffe3d4 100%);--login-bg: var(--playful-home-bg);--student-home-bg: var(--playful-home-bg);--teacher-home-bg: var(--playful-home-bg);--radius-sm: 10px;--radius-md: 14px;--radius-lg: 18px;--radius-xl: 24px;--radius-card: 22px;--radius-button: 16px;--radius-input: 16px;--shadow-sm: 0 2px 0 rgba(107, 93, 72, .1);--shadow-md: 0 12px 28px rgba(107, 93, 72, .12);--shadow-card: 0 10px 24px rgba(107, 93, 72, .1);--shadow-floating: 0 18px 44px rgba(107, 93, 72, .16);--button-primary-bg: var(--color-primary);--button-primary-bg-hover: var(--color-primary-hover);--button-primary-text: var(--color-text-inverse);--button-secondary-bg: var(--color-secondary-soft);--button-secondary-bg-hover: #fed7aa;--button-secondary-text: #9a3412;--button-ghost-bg-hover: var(--color-primary-soft);--button-ghost-text: var(--color-primary-active);--button-disabled-bg: #efe7d8;--button-disabled-text: #a99b85;--input-bg: #fffdf6;--input-border: 1px solid var(--color-border);--input-border-focus: var(--color-primary);--input-placeholder: var(--color-text-muted);--card-border: 1px solid var(--color-border-soft);--card-shadow: var(--shadow-card);--status-success-bg: #dcfce7;--status-success-text: #166534;--status-warning-bg: #ffedd5;--status-warning-text: #9a3412;--status-danger-bg: #fee2e2;--status-danger-text: #991b1b;--status-info-bg: #cffafe;--status-info-text: #0e7490;--status-muted-bg: #f7eddc;--status-muted-text: #7c6f5d;--login-card-bg: #fffaf0;--login-card-border: #a88f5f;--login-card-text: #6f4a2a;--login-input-bg: #f8f2dc;--login-input-border: #c6b895;--login-input-placeholder: #b8ad91;--login-button-bg: #fffdf4;--login-button-text: #6f4a2a;--login-button-shadow: 0 10px 0 rgba(111, 74, 42, .28);--nav-bg: var(--card-bg);--nav-item-hover-bg: var(--color-primary-soft);--nav-item-active-bg: var(--color-primary-soft);--nav-item-active-text: var(--color-primary-active);--hero-card-bg: var(--hero-bg);--hero-card-border: 1px solid rgba(20, 184, 166, .22);--hero-card-shadow: var(--shadow-md)}@font-face{font-display:swap;font-family:Nunito;font-style:normal;font-weight:500;src:url(/assets/nunito-latin-500-normal-EugFkASW.woff2) format("woff2")}@font-face{font-display:swap;font-family:Nunito;font-style:normal;font-weight:700;src:url(/assets/nunito-latin-700-normal-Dort48En.woff2) format("woff2")}@font-face{font-display:swap;font-family:Nunito;font-style:normal;font-weight:900;src:url(/assets/nunito-latin-900-normal-BVB1fGs6.woff2) format("woff2")}@font-face{font-display:swap;font-family:Noto Sans SC Playful;font-style:normal;font-weight:400;src:url(/assets/noto-sans-sc-chinese-simplified-400-normal-Ba7eOkfT.woff2) format("woff2")}@font-face{font-display:swap;font-family:Noto Sans SC Playful;font-style:normal;font-weight:500;src:url(/assets/noto-sans-sc-chinese-simplified-500-normal-z_irmif2.woff2) format("woff2")}@font-face{font-display:swap;font-family:Noto Sans SC Playful;font-style:normal;font-weight:700;src:url(/assets/noto-sans-sc-chinese-simplified-700-normal-DoUziBww.woff2) format("woff2")}.ui-button{display:inline-flex;align-items:center;justify-content:center;min-height:var(--button-height);padding:0 var(--button-padding-x);border:1px solid transparent;border-radius:var(--radius-button);font-family:var(--font-family-base);font-size:var(--button-font-size);font-weight:var(--font-weight-semibold);line-height:var(--line-height-title);text-decoration:none;white-space:nowrap;cursor:pointer;transition:background-color var(--transition-base),border-color var(--transition-base),color var(--transition-base),box-shadow var(--transition-base),transform var(--transition-fast)}.ui-button:hover:not(:disabled){transform:translateY(-1px)}.ui-button:focus-visible{outline:none;box-shadow:0 0 0 3px var(--color-focus-ring)}.ui-button--primary{color:var(--button-primary-text);background:var(--button-primary-bg);border-color:var(--button-primary-bg)}.ui-button--primary:hover:not(:disabled){background:var(--button-primary-bg-hover);border-color:var(--button-primary-bg-hover)}.ui-button--secondary{color:var(--button-secondary-text);background:var(--button-secondary-bg);border-color:var(--button-secondary-bg)}.ui-button--secondary:hover:not(:disabled){background:var(--button-secondary-bg-hover);border-color:var(--button-secondary-bg-hover)}.ui-button--ghost{color:var(--button-ghost-text);background:transparent;border-color:transparent}.ui-button--ghost:hover:not(:disabled){background:var(--button-ghost-bg-hover)}.ui-button:disabled{color:var(--button-disabled-text);background:var(--button-disabled-bg);border-color:var(--button-disabled-bg);cursor:not-allowed;transform:none;box-shadow:none}.ui-input{width:100%;min-height:var(--input-height);padding:0 var(--input-padding-x);border:var(--input-border);border-radius:var(--radius-input);font-family:var(--font-family-base);font-size:var(--font-size-md);line-height:var(--line-height-base);color:var(--color-text-primary);background:var(--input-bg);transition:border-color var(--transition-base),box-shadow var(--transition-base),background-color var(--transition-base)}.ui-input::placeholder{color:var(--input-placeholder)}.ui-input:focus{outline:none;border-color:var(--input-border-focus);box-shadow:0 0 0 3px var(--color-focus-ring)}.ui-input:disabled{color:var(--button-disabled-text);background:var(--status-muted-bg);cursor:not-allowed}.ui-card{padding:var(--card-padding);border:var(--card-border);border-radius:var(--radius-card);color:var(--color-text-primary);background:var(--card-bg);box-shadow:var(--card-shadow)}.ui-hero-card{padding:var(--space-6);border:var(--hero-card-border);border-radius:var(--radius-xl);color:var(--color-text-primary);background:var(--hero-card-bg);box-shadow:var(--hero-card-shadow)}.ui-status-badge{display:inline-flex;align-items:center;justify-content:center;min-height:var(--badge-height);padding:0 var(--badge-padding-x);border-radius:var(--badge-radius);font-family:var(--font-family-base);font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);line-height:var(--line-height-title);white-space:nowrap;background:var(--status-muted-bg);color:var(--status-muted-text)}.ui-status-badge--success{color:var(--status-success-text);background:var(--status-success-bg)}.ui-status-badge--warning{color:var(--status-warning-text);background:var(--status-warning-bg)}.ui-status-badge--danger{color:var(--status-danger-text);background:var(--status-danger-bg)}.ui-status-badge--info{color:var(--status-info-text);background:var(--status-info-bg)}.ui-status-badge--muted{color:var(--status-muted-text);background:var(--status-muted-bg)}:root,[data-theme=clean-edu],[data-theme=playful-edu]{--login-page-bg: var(--login-bg);--login-panel-bg: var(--card-bg);--login-panel-shadow: var(--shadow-floating);--student-page-bg: var(--student-home-bg);--student-hero-bg: var(--hero-card-bg);--teacher-page-bg: var(--teacher-home-bg);--teacher-hero-bg: var(--hero-card-bg);--classroom-entry-card-bg: var(--card-bg);--classroom-entry-action-bg: var(--button-primary-bg);--classroom-entry-muted-bg: var(--status-muted-bg);--schedule-bg: var(--page-bg);--schedule-month-bg: var(--card-bg);--schedule-panel-bg: var(--card-bg);--schedule-sidebar-bg: var(--card-bg);--schedule-border: var(--color-border-soft);--schedule-grid-line: var(--color-border-soft);--schedule-time-text: var(--color-text-muted);--schedule-today-bg: var(--color-primary-soft);--schedule-selected-day-bg: var(--color-primary);--schedule-selected-day-text: var(--color-text-inverse);--schedule-slot-height: 40px;--schedule-time-col-width: 56px;--schedule-header-height: 56px;--schedule-dot-color: var(--color-primary);--schedule-day-header-bg: var(--card-bg-hover);--lesson-type-formal-bg: var(--status-success-bg);--lesson-type-formal-border: var(--status-success-text);--lesson-type-formal-text: var(--status-success-text);--lesson-type-trial-bg: var(--status-info-bg);--lesson-type-trial-border: var(--status-info-text);--lesson-type-trial-text: var(--status-info-text);--lesson-type-makeup-bg: var(--status-warning-bg);--lesson-type-makeup-border: var(--status-warning-text);--lesson-type-makeup-text: var(--status-warning-text);--lesson-type-temporary-bg: #f3e8ff;--lesson-type-temporary-border: #7c3aed;--lesson-type-temporary-text: #6d28d9;--lesson-status-pending-bg: var(--status-muted-bg);--lesson-status-pending-text: var(--status-muted-text);--lesson-status-enterable-bg: var(--status-info-bg);--lesson-status-enterable-text: var(--status-info-text);--lesson-status-in-progress-bg: var(--status-success-bg);--lesson-status-in-progress-text: var(--status-success-text);--lesson-status-ended-bg: var(--status-muted-bg);--lesson-status-ended-text: var(--status-muted-text);--lesson-status-cancelled-bg: var(--status-danger-bg);--lesson-status-cancelled-text: var(--status-danger-text);--question-type-choice-bg: #e0e7ff;--question-type-choice-text: #3730a3;--question-type-spelling-bg: var(--status-warning-bg);--question-type-spelling-text: var(--status-warning-text);--question-type-fill-bg: #d1fae5;--question-type-fill-text: #065f46;--question-type-subjective-bg: #fce7f3;--question-type-subjective-text: #9d174d;--question-type-other-bg: var(--status-muted-bg);--question-type-other-text: var(--status-muted-text)}