:root{--btn-action-assign-bg: #EEF2FF;--btn-action-assign-text: #4F46E5;--btn-action-assign-border: #C7D2FE;--btn-action-review-bg: #ECFDF5;--btn-action-review-text: #059669;--btn-action-review-border: #A7F3D0;--btn-action-print-bg: #F5F3FF;--btn-action-print-text: #7C3AED;--btn-action-print-border: #DDD6FE;--btn-action-key-bg: #FFF7ED;--btn-action-key-text: #EA580C;--btn-action-key-border: #FED7AA;--btn-action-report-bg:#EFF6FF;--btn-action-report-text:#2563EB;--btn-action-report-border: #BFDBFE;--btn-action-sheet-bg: #FDF2F8;--btn-action-sheet-text: #DB2777;--btn-action-sheet-border: #FBCFE8;--brand-hue: 221;--brand-saturation: 83%;--brand-lightness: 47%;--brand-rgb-components: 37, 99, 235;color-scheme:light;--font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-family-monospace: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;--font-size-root: 16px;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-md: 1.125rem;--font-size-lg: 1.25rem;--font-size-xl: 1.5rem;--font-size-2xl: 1.875rem;--line-height-tight: 1.25;--line-height-snug: 1.375;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--spacing-unit: 1rem;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--border-radius: .5rem;--border-radius-sm: .375rem;--border-radius-md: .5rem;--border-radius-lg: .75rem;--border-radius-xl: 1rem;--border-radius-pill: 9999px;--border-radius-round: 50%;--box-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, .05);--box-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, .07), 0 1px 2px -1px rgba(0, 0, 0, .04);--box-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--box-shadow-md: 0 6px 10px -2px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-inner: inset 0 1px 2px rgba(0,0,0,.05);--transition: all .2s ease-in-out;--sidebar-width-collapsed: 60px;--exam-header-height: 56px;--animation-ellipsis-duration: 1.4s;--accent-color: hsl(var(--brand-hue), var(--brand-saturation), var(--brand-lightness));--accent-color-hover: hsl(var(--brand-hue), var(--brand-saturation), calc(var(--brand-lightness) - 5%));--accent-color-light: rgba(var(--brand-rgb-components), .1);--accent-color-rgb: var(--brand-rgb-components);--text-primary: #111827;--text-secondary: #4B5563;--text-tertiary: #6B7280;--text-placeholder: #9CA3AF;--text-accent: hsl(var(--brand-hue), var(--brand-saturation), 40%);--text-on-accent: hsl(var(--brand-hue), 20%, 98%);--text-on-primary-button: var(--text-on-accent);--text-subject-header: var(--text-accent);--text-primary-rgb: 17, 24, 39;--background-primary: #F9FAFB;--background-secondary: #FFFFFF;--background-tertiary: #F3F4F6;--background-hover: hsl(var(--brand-hue), 25%, 95%);--background-accent: var(--accent-color-light);--background-overlay: rgba(30, 41, 59, .5);--background-elevation-1: var(--background-secondary);--card-bg: var(--background-secondary);--border-primary: #E5E7EB;--border-secondary: #D1D5DB;--border-light: var(--border-primary);--border-accent: rgba(var(--brand-rgb-components), .3);--border-question: var(--border-accent);--border-primary-rgb: 229, 231, 235;--purple-accent-base: #7C3AED;--purple-accent-rgb: 124, 58, 237;--purple-accent-light: rgba(124, 58, 237, .15);--purple-accent-dark: #6D28D9;--text-on-purple-accent: #FFFFFF;--input-bg: var(--background-secondary);--input-text: var(--text-primary);--input-border: var(--border-secondary);--input-focus-border: var(--accent-color);--input-focus-shadow: 0 0 0 3px rgba(var(--brand-rgb-components), .25);--datetime-picker-indicator-invert: 1;--form-select-arrow-light: url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%234B5563%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);--button-primary-bg: var(--accent-color);--button-primary-hover-bg: var(--accent-color-hover);--button-secondary-bg: #E5E7EB;--button-secondary-hover-bg: #D1D5DB;--button-secondary-text: #1F2937;--button-outline-secondary-text: var(--text-secondary);--button-outline-secondary-border: var(--border-secondary);--button-outline-secondary-hover-bg: var(--background-tertiary);--button-outline-secondary-hover-text: var(--text-primary);--button-outline-secondary-hover-border: var(--border-primary);--button-secondary-accent-bg: var(--accent-color-light);--button-secondary-accent-hover-bg: rgba(var(--brand-rgb-components), .15);--button-secondary-accent-text: var(--text-accent);--button-secondary-accent-border: var(--border-accent);--button-danger-bg: #EF4444;--button-danger-hover-bg: #DC2626;--button-warning-bg: #F59E0B;--button-warning-hover-bg: #D97706;--text-on-warning: #1E293B;--button-success-bg: #10B981;--button-success-hover-bg: #059669;--button-info-bg: var(--accent-color);--button-info-hover-bg: var(--accent-color-hover);--text-on-info-button: var(--text-on-accent);--button-disabled-bg: #9CA3AF;--button-disabled-border: #9CA3AF;--button-disabled-opacity: .6;--button-disabled-text: #FFFFFF;--success-color: #16A34A;--success-bg: #DCFCE7;--success-border: #BBF7D0;--danger-color: #DC2626;--danger-bg: #FEE2E2;--danger-border: #FECACA;--warning-color: #F59E0B;--warning-bg: #FEF3C7;--warning-border: #FDE68A;--info-color: var(--accent-color);--info-bg: var(--accent-color-light);--info-border: var(--border-accent);--scrollbar-thumb: #CBD5E1;--scrollbar-track: #F3F4F6;--scrollbar-thumb-hover: #9CA3AF;--color-coin: #FBBF24;--color-pyq: #2DD4BF;--color-pyq-bg: rgba(45, 212, 191, .1);--color-practice: #A855F7;--color-practice-bg: rgba(168, 85, 247, .1);--color-exam: #EC4899;--color-exam-bg: rgba(236, 72, 153, .1);--color-time: var(--color-exam, #EC4899);--color-dpp: #F472B6;--color-dpp-bg: rgba(244, 114, 182, .1);--color-assignments: #60A5FA;--color-assignments-bg: rgba(96,165,250,.1);--color-ai-tutor: var(--accent-color);--color-ai-tutor-bg: var(--accent-color-light);--chart-color-1: var(--accent-color);--chart-color-2: var(--purple-accent-base);--chart-color-3: var(--success-color);--chart-color-4: var(--warning-color);--chart-color-5: #0EA5E9;--chart-color-6: var(--danger-color);--timer-bg: rgba(var(--brand-rgb-components), .08);--timer-border-color: rgba(var(--brand-rgb-components), .7);--timer-text-color: var(--text-primary);--item-bg-color-raw-blue: 59, 130, 246;--item-bg-color-raw-green: 22, 163, 74;--item-bg-color-raw-yellow: 245, 158, 11;--content-padding-x-desktop: var(--spacing-xl);--content-padding-x-mobile: var(--spacing-md);--view-footer-max-width: 900px;--summary-color-1: #3B82F6;--summary-color-2: #10B981;--summary-color-3: #F59E0B;--summary-color-4: #EF4444;--mock-color: #3B82F6;--live-color: #EF4444;--full-length-color: #F59E0B;--pyq-color: #10B981;--sectional-color: #8B5CF6;--general-badge-color: #6B7280;--text-on-badge: #FFFFFF;--btn-reattempt-bg: var(--background-secondary);--btn-reattempt-text: var(--text-accent);--btn-reattempt-border: var(--text-accent);--palette-bg: var(--background-secondary);--palette-text-primary: var(--text-primary);--palette-text-secondary: var(--text-secondary);--palette-border-color: var(--border-primary);--palette-green-answered-bg: var(--success-bg);--palette-green-answered-border: var(--success-color);--palette-green-answered-text: var(--success-color);--palette-green-answered-hover-bg: rgba(22, 163, 74, .2);--palette-red-not-answered-bg: var(--danger-bg);--palette-red-not-answered-border: var(--danger-color);--palette-red-not-answered-text: var(--danger-color);--palette-red-not-answered-hover-bg: rgba(220, 38, 38, .2);--palette-gray-not-visited-bg: var(--background-tertiary);--palette-gray-not-visited-border: var(--border-secondary);--palette-gray-not-visited-text: var(--text-secondary);--palette-gray-not-visited-hover-bg: var(--background-hover);--palette-blue-current-bg: var(--accent-color);--palette-blue-current-border: var(--accent-color);--palette-blue-current-text: var(--text-on-accent);--palette-blue-current-hover-bg: var(--accent-color-hover);--palette-blue-current-hover-border: var(--accent-color-hover);--palette-purple-marked-bg: var(--purple-accent-base);--palette-purple-marked-border: var(--purple-accent-base);--palette-purple-marked-text: var(--text-on-purple-accent);--palette-purple-marked-hover-bg: var(--purple-accent-dark);--palette-purple-marked-hover-border: var(--purple-accent-dark);--section-color-1: #007AFF;--section-color-2: #34C759;--section-color-3: #FF9500;--section-color-4: #FF3B30;--section-color-5: #AF52DE;--section-color-6: #FF6B22;--section-color-7: #5AC8FA;--section-tab-active-text: #ffffff;--section-tab-hover-opacity: .85;--modal-backdrop-bg: rgba(0, 0, 0, .65);--modal-content-bg: var(--background-secondary);--modal-text: var(--text-primary);--modal-border-color: var(--border-light);--modal-header-border: var(--border-light);--modal-title-text: var(--text-primary);--modal-close-button-color: var(--text-secondary);--modal-close-button-hover-color: var(--accent-color);--modal-body-text: var(--text-secondary);--modal-list-item-border: rgba(var(--border-primary-rgb), .3);--modal-list-item-hover-bg: var(--background-hover);--modal-list-item-label-text: var(--text-primary);--modal-list-item-label-span-text: var(--text-tertiary);--modal-footer-border: var(--border-light);--sparkle-light-color: #ffffff;--sparkle-accent-color: #fef08a;--sidebar-bg: var(--background-secondary);--sidebar-width: 280px;--sidebar-item-hover: var(--background-tertiary);--sidebar-item-active-bg: var(--accent-color-light);--sidebar-item-active-text: var(--accent-color);--sidebar-icon-size: 1.25rem;--avatar-bg: var(--accent-color);--avatar-text: #ffffff;--premium-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);--premium-text: #ffffff;--context-badge-bg: #e5e7eb;--context-badge-text: #4b5563;--context-badge-border: #d1d5db;--difficulty-easy-bg: #def7ec;--difficulty-easy-text: #059669;--difficulty-medium-bg: #fef3c7;--difficulty-medium-text: #d97706;--difficulty-hard-bg: #fee2e2;--difficulty-hard-text: #dc2626;--timer-icon-color: #4b5563;--timer-bg-light: #f3f4f6;--option-selected-border-color: var(--accent-color);--topic-badge-bg: #e0e7ff;--topic-badge-text: #4338ca}:root.dark-mode{color-scheme:dark;--btn-action-assign-bg: rgba(79, 70, 229, .15);--btn-action-assign-text: #818CF8;--btn-action-assign-border: #4338CA;--btn-action-review-bg: rgba(5, 150, 105, .15);--btn-action-review-text: #34D399;--btn-action-review-border: #065F46;--btn-action-print-bg: rgba(124, 58, 237, .15);--btn-action-print-text: #A78BFA;--btn-action-print-border: #5B21B6;--btn-action-key-bg: rgba(234, 88, 12, .15);--btn-action-key-text: #FB923C;--btn-action-key-border: #9A3412;--btn-action-report-bg: rgba(37, 99, 235, .15);--btn-action-report-text:#60A5FA;--btn-action-report-border: #1E40AF;--btn-action-sheet-bg: rgba(219, 39, 119, .15);--btn-action-sheet-text: #F472B6;--btn-action-sheet-border: #831843;--accent-color: hsl(var(--brand-hue), var(--brand-saturation), 65%);--accent-color-hover: hsl(var(--brand-hue), var(--brand-saturation), 70%);--accent-color-light: rgba(var(--brand-rgb-components), .2);--text-primary: #F3F4F6;--text-secondary: #9CA3AF;--text-tertiary: #6B7280;--text-accent: var(--accent-color);--text-on-accent: hsl(var(--brand-hue), 30%, 10%);--background-primary: #111827;--background-secondary: #1F2937;--background-tertiary: #374151;--background-hover: hsl(var(--brand-hue), 15%, 25%);--border-primary: #374151;--border-secondary: #4B5563;--border-accent: rgba(var(--brand-rgb-components), .3);--purple-accent-base: #A78BFA;--purple-accent-light: rgba(167, 139, 250, .2);--purple-accent-dark: #8B5CF6;--text-on-purple-accent: #111827;--background-accent: var(--accent-color-light);--background-elevation-1: #2c3747;--text-primary-rgb: 243, 244, 246;--text-placeholder: #6B7280;--text-subject-header: var(--text-accent);--text-on-primary-button: var(--text-on-accent);--border-light: var(--border-primary);--border-question: var(--border-accent);--border-primary-rgb: 55, 65, 81;--input-bg: var(--background-tertiary);--input-focus-shadow: 0 0 0 3px rgba(var(--brand-rgb-components), .3);--form-select-arrow-light: url(data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%239CA3AF%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E);--button-primary-bg: var(--accent-color);--button-primary-hover-bg: var(--accent-color-hover);--button-secondary-bg: #374151;--button-secondary-hover-bg: #4B5563;--button-secondary-text: #F3F4F6;--button-secondary-accent-bg: var(--accent-color-light);--button-secondary-accent-hover-bg: rgba(var(--brand-rgb-components), .25);--button-secondary-accent-text: var(--text-accent);--button-secondary-accent-border: var(--border-accent);--button-danger-hover-bg: #F87171;--button-success-hover-bg: #34D399;--button-info-bg: var(--accent-color);--button-info-hover-bg: var(--accent-color-hover);--button-disabled-bg: #4B5563;--button-disabled-border: #4B5563;--button-disabled-text: #9CA3AF;--success-color: #4ADE80;--success-bg: rgba(74, 222, 128, .15);--success-border: #22C55E;--danger-color: #F87171;--danger-bg: rgba(248, 113, 113, .15);--danger-border: #EF4444;--warning-color: #FACC15;--warning-bg: rgba(250, 204, 21, .15);--warning-border: #F59E0B;--info-color: var(--accent-color);--info-bg: var(--accent-color-light);--info-border: #3B82F6;--box-shadow: 0 4px 6px -1px rgba(0,0,0,.5), 0 2px 4px -1px rgba(0,0,0,.4);--box-shadow-md: 0 6px 10px -2px rgba(0,0,0,.5), 0 4px 6px -2px rgba(0,0,0,.4);--scrollbar-thumb: #4B5563;--scrollbar-track: #1F2937;--scrollbar-thumb-hover: #6B7280;--modal-backdrop-bg: rgba(0, 0, 0, .85);--modal-list-item-border: rgba(var(--border-primary-rgb), .3);--sparkle-light-color: #4B5563;--sparkle-accent-color: #a4800c;--context-badge-bg: #374151;--context-badge-text: #d1d5db;--context-badge-border: #4b5563;--difficulty-easy-bg: #064e3b;--difficulty-easy-text: #6ee7b7;--difficulty-medium-bg: #713f12;--difficulty-medium-text: #fcd34d;--difficulty-hard-bg: #991b1b;--difficulty-hard-text: #fca5a5;--timer-icon-color: #9ca3af;--timer-bg-light: #374151;--option-selected-border-color: var(--accent-color);--topic-badge-bg: #3730a3;--topic-badge-text: #c7d2fe}@media (max-width: 768px){:root{--font-size-root: 15px}}@media (max-width: 480px){:root{--font-size-root: 14.5px}}@keyframes animated-ellipsis-frames{0%{content:"."}33%{content:".."}66%,to{content:"..."}}.animated-ellipsis:after{display:inline-block;text-align:left;width:1.25em;content:".";animation:animated-ellipsis-frames 1.4s infinite;color:var(--text-secondary);vertical-align:bottom}:root{--button-action-assign-bg: #eef2ff;--button-action-assign-border: #c7d2fe;--button-action-assign-text: #4338ca;--button-action-review-bg: #f0fdfa;--button-action-review-border: #99f6e4;--button-action-review-text: #0f766e;--button-action-print-bg: #f5f3ff;--button-action-print-border: #ddd6fe;--button-action-print-text: #6d28d9;--button-action-sheet-bg: #fdf2f8;--button-action-sheet-border: #fbcfe8;--button-action-sheet-text: #be185d;--button-action-report-bg: #fff7ed;--button-action-report-border: #fed7aa;--button-action-report-text: #9a3412}.dark-mode{--button-action-assign-bg: #3730a3;--button-action-assign-border: #4f46e5;--button-action-assign-text: #e0e7ff;--button-action-review-bg: #115e59;--button-action-review-border: #14b8a6;--button-action-review-text: #ccfbf1;--button-action-print-bg: #5b21b6;--button-action-print-border: #7c3aed;--button-action-print-text: #ede9fe;--button-action-sheet-bg: #9d174d;--button-action-sheet-border: #db2777;--button-action-sheet-text: #fce7f3;--button-action-report-bg: #7c2d12;--button-action-report-border: #f97316;--button-action-report-text: #ffedd5}html{box-sizing:border-box;font-size:var(--font-size-root, 16px);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;color-scheme:light;touch-action:pan-x pan-y;overscroll-behavior-y:none}html.dark-mode{color-scheme:dark}body{font-family:var(--font-family-sans);margin:0;background-color:var(--background-primary);color:var(--text-primary);font-size:var(--font-size-base);line-height:var(--line-height-normal, 1.6);transition:background-color .2s ease-in-out,color .2s ease-in-out;overflow-x:hidden;overscroll-behavior-y:none;-webkit-touch-callout:none}h1,h2,h3,h4,h5,h6{color:var(--text-primary);margin:0 0 1rem;font-weight:600;line-height:var(--line-height-tight, 1.3)}h1{font-size:var(--font-size-xl, 1.75rem)}h2{font-size:var(--font-size-lg, 1.375rem)}h3{font-size:var(--font-size-md, 1.125rem)}h4{font-size:var(--font-size-base, 1rem)}h5{font-size:var(--font-size-sm, .9rem)}p{margin:0 0 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.contact-link{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;color:var(--text-secondary);background-color:var(--background-primary);border:1px solid var(--border-primary);transition:all .2s ease-in-out}.sidebar .contact-link:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);color:#fff}.sidebar .contact-link.whatsapp:hover{background-color:#25d366;border-color:#25d366}.sidebar .contact-link.phone:hover{background-color:var(--info-color, #3B82F6);border-color:var(--info-color, #3B82F6)}.sidebar .contact-link.email:hover{background-color:var(--brand-color, var(--accent-color));border-color:var(--brand-color, var(--accent-color))}.sidebar .contact-link svg{width:18px;height:18px}@media (max-width: 768px){.sidebar{width:var(--sidebar-width-mobile, 280px);transform:translate(-100%);box-shadow:var(--shadow-xl)}.sidebar.sidebar--open{transform:translate(0)}.sidebar .sidebar-header{padding:.75rem 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.sidebar::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover-dark, rgba(255, 255, 255, .4))}.sidebar .scrollable-list::-webkit-scrollbar{width:5px}.sidebar .scrollable-list::-webkit-scrollbar-thumb{border-radius:2.5px}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--background-overlay, rgba(0, 0, 0, .65));display:flex;justify-content:center;align-items:center;z-index:99999!important;opacity:0;visibility:hidden;transition:opacity .3s ease-in-out,visibility 0s linear .3s}.modal-overlay.modal-overlay--visible{opacity:1!important;visibility:visible!important;transition-delay:0s}.modal{background:var(--background-secondary, #ffffff);color:var(--text-primary, #111827);padding:var(--spacing-lg, 24px);border-radius:var(--border-radius-lg, .75rem);box-shadow:var(--shadow-lg, 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05));width:90%;max-width:550px;max-height:90vh;overflow-y:auto;position:relative;z-index:100000!important;transform:scale(.95) translateY(10px);opacity:0;transition:transform .3s ease-out,opacity .3s ease-out}.modal-overlay--visible .modal{transform:scale(1) translateY(0);opacity:1}.modal-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-primary, #e5e7eb);padding-bottom:var(--spacing-md, 16px);margin-bottom:var(--spacing-md, 16px)}.modal-header h2{margin:0;font-size:1.375rem;font-weight:600;color:var(--text-primary);line-height:1.3}.btn-close{background:transparent;border:none;font-size:1.5rem;color:var(--text-secondary, #6b7280);cursor:pointer;padding:var(--spacing-xs, 4px);line-height:1;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--border-radius-sm)}.btn-close:hover{color:var(--text-primary, #111827);background-color:var(--background-hover, 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0}.share-options-title{font-size:1rem;font-weight:500;margin-bottom:var(--spacing-md, 16px);color:var(--text-primary, #111827);text-align:center}.share-buttons-container{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--spacing-md, 16px)}.btn-share{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;padding:0;border-radius:var(--border-radius-round, 50%);font-size:1.6rem;border:none;transition:var(--transition, all .2s ease-in-out);color:#fff;box-shadow:var(--shadow-sm)}.btn-share:hover:not(:disabled){opacity:.85;transform:translateY(-2px) scale(1.05);box-shadow:var(--shadow-md)}.btn-share:disabled{background-color:var(--button-disabled-bg, #9ca3af)!important;color:var(--button-disabled-text, #ffffff)!important;opacity:var(--button-disabled-opacity, .6)!important;cursor:not-allowed!important}.btn-share.native-share{background-color:var(--button-secondary-bg, #e5e7eb);color:var(--button-secondary-text, 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.btn-close-modal:hover{color:var(--accent-color)}.change-password-modal-body{flex-grow:1;overflow-y:auto}.change-password-modal-body .modal-step-info{font-size:.9rem;color:var(--text-secondary);margin-bottom:var(--spacing-lg, 24px);padding-bottom:var(--spacing-sm, 8px);border-bottom:1px dashed var(--border-light);text-align:center}.change-password-modal-body .form-group{margin-bottom:var(--spacing-lg, 1.25rem)}.change-password-modal-body label{display:block;margin-bottom:var(--spacing-sm, 8px);font-size:.9rem;font-weight:500;color:var(--text-secondary-strong, var(--text-secondary))}.change-password-modal-body .form-control{width:100%;padding:var(--input-padding-y, .65rem) var(--input-padding-x, .85rem);font-size:1rem;line-height:1.5;color:var(--input-text);background-color:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--border-radius-md);transition:border-color .15s ease-in-out,box-shadow .15s ease-in-out}.change-password-modal-body 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.display-message.error{background-color:var(--danger-bg);color:var(--danger-text-strong, var(--danger-color));border:1px solid var(--danger-border)}.change-password-modal-body .display-message svg{margin-right:var(--spacing-sm, .5em);flex-shrink:0;font-size:1.1em}.pricing-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#f3f4f780;display:flex;align-items:center;justify-content:center;z-index:var(--z-index-modal, 3000);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);animation:fadeIn .3s ease;padding:1rem}:root.dark-mode .pricing-modal-overlay{background-color:#16181d99}.pricing-modal-content{background:var(--background-primary);padding:1.5rem 2rem;border-radius:var(--border-radius-xl, 16px);width:100%;max-width:880px;position:relative;box-shadow:0 20px 40px -15px #0003;border:1px solid var(--border-primary);animation:slideInUp .4s cubic-bezier(.25,1,.5,1);max-height:95vh;display:flex;flex-direction:column;overflow-y:auto}@keyframes 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var(--border-primary);flex-shrink:0;flex-wrap:nowrap}.billing-cycle-toggle button{padding:.4rem 1.1rem;border:none;background-color:transparent;color:var(--text-secondary);font-weight:600;border-radius:var(--border-radius-full);cursor:pointer;transition:all .3s ease;white-space:nowrap;font-size:.85rem}.billing-cycle-toggle button.active{background-color:var(--brand-color, var(--accent-color));color:#fff;box-shadow:0 3px 10px rgba(var(--brand-rgb-components, 37, 99, 235),.3)}.save-badge{background-color:var(--success-color);color:#fff;font-size:.65rem;padding:2px 6px;border-radius:var(--border-radius-full);margin-left:.5rem;font-weight:500}.pricing-tiers-container{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}.pricing-tier-card{display:flex;flex-direction:column;background:var(--background-secondary);border:1px solid var(--border-primary);border-radius:var(--border-radius-lg);padding:1.5rem;text-align:center;transition:all .3s ease;position:relative}.pricing-tier-card:hover{transform:translateY(-8px);box-shadow:0 12px 25px #00000014}:root.dark-mode .pricing-tier-card:hover{box-shadow:0 12px 25px #0003}.tier-card-body{display:flex;flex-direction:column;flex-grow:1}.pricing-tier-card.popular{border-color:var(--purple-accent-base);transform:scale(1.05);background:var(--background-primary)}.pricing-tier-card.popular:hover{transform:scale(1.05) translateY(-8px)}.popular-badge{position:absolute;top:-1px;right:-1px;background:var(--purple-accent-base);color:#fff;padding:.35rem 1rem;font-size:.75rem;font-weight:600;border-radius:0 var(--border-radius-lg) 0 var(--border-radius-lg)}.tier-header{display:flex;align-items:center;justify-content:center;gap:.6rem;margin-bottom:.5rem}.tier-icon{font-size:1.5rem}.pricing-tier-card:nth-child(1) .tier-icon{color:var(--success-color)}.pricing-tier-card:nth-child(2) .tier-icon{color:var(--info-color)}.pricing-tier-card:nth-child(3) .tier-icon{color:var(--purple-accent-base)}.tier-header h3{font-size:1.25rem;font-weight:600;color:var(--text-primary);margin:0}.tier-description{color:var(--text-secondary);font-size:.85rem;min-height:2.5em;margin-bottom:.75rem}.tier-price{margin:.5rem 0 1.25rem}.price-amount{font-size:2rem;font-weight:700;color:var(--text-primary)}.original-price{font-size:1rem;color:var(--text-disabled);text-decoration:line-through;margin-left:.4rem}.price-cycle{font-size:.85rem;color:var(--text-secondary)}.contact-text{font-size:1rem;font-weight:500;color:var(--text-primary);min-height:44px;display:flex;align-items:center;justify-content:center}.tier-features{list-style:none;padding:0;margin:1.5rem 0;text-align:left}.tier-features li{display:flex;align-items:center;gap:.6rem;margin-bottom:.75rem;font-size:.875rem;color:var(--text-primary);transition:color .2s ease}.tier-features li.disabled{color:var(--text-disabled)}.feature-icon-wrapper{width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.feature-icon-wrapper.enabled{background-color:hsla(var(--success-h),var(--success-s),var(--success-l),.15);color:var(--success-color)}.feature-icon-wrapper.disabled{background-color:var(--background-tertiary);color:var(--text-disabled)}.feature-icon-wrapper svg{width:12px;height:12px}.feature-note{margin-left:auto;font-size:.7rem;font-weight:500;padding:3px 7px;border-radius:var(--border-radius-md);white-space:nowrap}.feature-note.limit{background-color:hsla(var(--warning-h),var(--warning-s),var(--warning-l),.15);color:var(--warning-color-dark)}:root.dark-mode .feature-note.limit{color:var(--warning-color-light)}.feature-note.unlimited{background-color:hsla(var(--success-h),var(--success-s),var(--success-l),.15);color:var(--success-color-dark)}:root.dark-mode .feature-note.unlimited{color:var(--success-color-light)}.tier-cta-button-wrapper{margin-top:auto;padding-top:1rem}.tier-cta-btn{width:100%;padding:.7rem 1rem;border-radius:var(--border-radius-md);font-size:.9rem;font-weight:600;cursor:pointer;transition:all .3s ease;border:2px solid transparent;display:flex;align-items:center;justify-content:center;gap:.5rem}.pricing-tier-card.popular .tier-cta-btn:not(.institute-cta){background-color:var(--purple-accent-base);color:#fff;border-color:var(--purple-accent-base)}.pricing-tier-card:not(.popular) .tier-cta-btn:not(.institute-cta){background:transparent;color:var(--brand-color);border-color:var(--brand-color)}.pricing-tier-card:not(.popular) .tier-cta-btn:not(.institute-cta):hover:not(:disabled){background:var(--brand-color);color:#fff}.tier-cta-btn.institute-cta{background:transparent;color:var(--text-primary);border-color:var(--border-secondary)}.tier-cta-btn.institute-cta:hover:not(:disabled){background:var(--background-hover);border-color:var(--border-primary)}.pricing-tier-card.current .tier-cta-btn{background-color:var(--background-tertiary);border-color:var(--border-primary);color:var(--text-secondary);cursor:default}.tier-cta-btn:disabled:not(.current){opacity:.4;cursor:not-allowed}.tier-cta-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px -2px #0000001a}.tier-cta-btn:disabled:hover{transform:none;box-shadow:none}.coupon-section{text-align:center;margin-top:1.5rem;padding:.75rem;background-color:var(--background-secondary);border-radius:var(--border-radius-md);border:1px dashed var(--brand-color);color:var(--text-secondary);font-size:.85rem;flex-shrink:0}.coupon-section span{color:var(--text-primary);font-weight:600}.coupon-code{background-color:var(--brand-color-light);color:var(--brand-color)!important;padding:3px 8px;border-radius:var(--border-radius-sm);margin:0 5px}@media (max-width: 800px){.pricing-tiers-container{grid-template-columns:1fr;gap:1.25rem}.pricing-tier-card.popular{transform:scale(1)}}@media (max-width: 480px){.pricing-modal-overlay{padding:0;align-items:flex-end}.pricing-modal-content{border-radius:var(--border-radius-xl) var(--border-radius-xl) 0 0;max-height:90vh;animation:slideInFromBottom .4s ease-out}@keyframes slideInFromBottom{0%{transform:translateY(100%)}to{transform:translateY(0)}}.billing-cycle-toggle{width:100%}.billing-cycle-toggle button{flex:1}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:var(--modal-backdrop-bg, rgba(0, 0, 0, .65));display:flex;justify-content:center;align-items:center;z-index:var(--z-index-modal, 1050);padding:var(--spacing-md, 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.admin-filter-select{min-width:220px;flex-shrink:0}.admin-pagination-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1.5rem;padding:var(--spacing-md) var(--spacing-lg);border-top:1px solid var(--border-primary);font-size:var(--font-size-sm);color:var(--text-secondary)}.pagination-controls{display:flex;align-items:center;gap:.5rem}.admin-pagination-footer .btn-icon{border:1px solid var(--border-secondary);font-weight:500;min-width:28px;width:auto;height:28px;padding:0 .4rem;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--border-radius-sm);white-space:nowrap;transition:background-color .2s,border-color .2s}.admin-pagination-footer .btn-icon:disabled{opacity:.5;background-color:transparent;cursor:not-allowed}.admin-pagination-footer .btn-icon:not(:disabled):hover{background-color:var(--background-tertiary);border-color:var(--border-primary)}.admin-pagination-footer .page-number.active{background-color:var(--accent-color);border-color:var(--accent-color);color:var(--text-on-accent);font-weight:700}.ellipsis{padding:0 .5rem;color:var(--text-tertiary);-webkit-user-select:none;user-select:none}.pagination-goto{display:flex;align-items:center;gap:.75rem}.pagination-goto label{font-weight:500}.goto-input{width:70px;height:36px;text-align:center;border-radius:var(--border-radius-sm);border:1px solid var(--border-secondary);background-color:var(--input-bg);color:var(--input-text);font-size:var(--font-size-base)}.goto-input:focus{outline:none;border-color:var(--accent-color);box-shadow:var(--input-focus-shadow)}@media (max-width: 768px){.pagination-text{display:none}.admin-pagination-footer .btn-icon{padding:0 .2rem;min-width:24px;height:24px;font-size:.8rem}.pagination-controls{gap:.25rem}}.batch-manager-container{display:flex;flex-direction:column;gap:var(--spacing-md)}.batch-manager-container .admin-form-group{margin:0}.batch-manager-container 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0;color:var(--text-color)}.permission-list-item-empty{font-size:.9rem;color:var(--text-color-lighter);font-style:italic}.centered-content-small{display:flex;align-items:center;justify-content:center;gap:.5rem;padding:1rem;color:var(--text-color-light)}.loading-icon-small{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.batch-manage-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-lg)}.batch-column{display:flex;flex-direction:column;gap:var(--spacing-md);background-color:var(--background-primary);padding:var(--spacing-md);border-radius:var(--border-radius-lg)}.column-title{font-size:var(--font-size-md);font-weight:600;color:var(--text-primary);margin-bottom:0}.results-list{list-style:none;padding:0;margin:0;height:350px;overflow-y:auto;display:flex;flex-direction:column;gap:var(--spacing-sm)}.list-item{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 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1fr}.admin-content-wrapper{display:flex;flex-direction:column;overflow-y:auto;background-color:var(--background-primary)}.admin-main-header{display:flex;align-items:center;justify-content:space-between;padding:.75rem var(--spacing-lg);border-bottom:1px solid var(--border-primary);background-color:var(--background-secondary);position:sticky;top:0;z-index:900}.mobile-menu-trigger{display:none;font-size:1.5rem;color:var(--text-secondary);background-color:transparent;border:none;padding:.5rem;margin-right:1rem;border-radius:var(--border-radius-md)}.mobile-menu-trigger:hover{background-color:var(--background-tertiary);color:var(--text-primary)}.global-filter-container{margin-left:auto}.admin-filter-select{min-width:250px;font-size:var(--font-size-sm);padding:.5rem 1rem;background-color:var(--input-bg);border:1px solid var(--border-secondary)}.admin-main-content{flex-grow:1;padding:var(--spacing-lg)}@media (max-width: 992px){.admin-layout{grid-template-columns:1fr}.admin-layout .admin-sidebar{position:fixed;left:0;top:0;bottom:0;transform:translate(-100%);transition:transform .3s ease-in-out;z-index:1001;box-shadow:var(--box-shadow-lg)}.admin-layout.mobile-menu-open .admin-sidebar{transform:translate(0)}.mobile-menu-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background-color:#00000080;z-index:1000;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.mobile-menu-trigger{display:block}.admin-sidebar .collapse-button{display:none}.admin-main-header{justify-content:flex-start}.admin-main-content{padding:var(--spacing-md)}}.sidebar.teacher-sidebar{display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden}.teacher-sidebar .sidebar-inner{display:flex;flex-direction:column;min-height:100%;padding:0;overflow:visible}.teacher-sidebar .teacher-nav-section{flex-grow:1;padding:.75rem .5rem;display:flex;flex-direction:column}.teacher-sidebar .sidebar-section--footer{margin-top:auto;padding:1rem;border-top:1px solid var(--border-primary);background-color:var(--background-secondary)}.teacher-sidebar .sidebar-header{padding:1rem;border-bottom:1px solid var(--border-primary)}.teacher-sidebar .teacher-logo-wrapper{padding-bottom:1rem;margin-bottom:1rem;border-bottom:1px solid var(--border-primary);display:flex;justify-content:center;align-items:center}.teacher-sidebar .teacher-logo{max-height:36px;max-width:150px;object-fit:contain;transition:all .2s ease}.teacher-sidebar .plan-expiry{font-size:.75rem;font-weight:500;color:var(--text-secondary);margin-top:.25rem}.teacher-nav-item{width:100%;display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;border:1px solid transparent;background:transparent;color:var(--text-secondary);border-radius:var(--border-radius-md);cursor:pointer;margin-bottom:.35rem;font-size:.9rem;font-weight:500;text-align:left;transition:all .2s 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.leaderboard-title{display:flex;align-items:center;flex-grow:1;cursor:pointer;font-size:.9rem;font-weight:700;color:var(--text-primary);gap:.6rem;-webkit-user-select:none;user-select:none}.teacher-sidebar .leaderboard-title>svg:first-child{color:gold;font-size:1.1rem;filter:drop-shadow(0 2px 3px rgba(0,0,0,.1))}.teacher-sidebar .leaderboard-toggle-spacer svg{color:var(--text-primary);filter:none}.teacher-sidebar .leaderboard-toggle-spacer{margin-left:auto;padding-right:.75rem;display:flex;align-items:center;justify-content:center;color:var(--text-primary);font-size:1.1rem;opacity:.8;transition:opacity .2s ease}.teacher-sidebar .leaderboard-title:hover .leaderboard-toggle-spacer{opacity:1;color:var(--text-primary)}.teacher-sidebar .leaderboard-title:hover{color:var(--accent-color)}.teacher-sidebar .leaderboard-refresh-btn{background:transparent;border:1px solid var(--border-primary);color:var(--text-primary);padding:0;border-radius:50%;width:32px;height:32px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;flex-shrink:0;font-size:1rem}.teacher-sidebar .leaderboard-refresh-btn:hover:not(:disabled){color:var(--accent-color);background-color:var(--background-tertiary);border-color:var(--accent-color);transform:rotate(180deg);box-shadow:0 2px 5px #0000000d}.teacher-sidebar .leaderboard-refresh-btn:disabled{opacity:.5;cursor:not-allowed}.teacher-sidebar .sidebar-theme-switch-row{margin-top:.75rem;padding-top:.75rem;border-top:1px dotted var(--border-primary)}.teacher-sidebar .sidebar-theme-switch-row .theme-label{font-size:.75rem;font-weight:600;color:var(--text-secondary)}.teacher-sidebar .btn-change-password,.teacher-sidebar .btn-signout{width:100%;display:flex;align-items:center;justify-content:center;gap:.75rem;padding:.65rem .75rem;font-weight:500;border-radius:var(--border-radius-md);transition:all .2s ease;font-size:.875rem}.teacher-sidebar .btn-change-password{background-color:var(--button-secondary-bg, hsl(210, 15%, 95%));color:var(--button-secondary-text, hsl(210, 10%, 40%));border:1px solid var(--button-secondary-border, hsl(210, 15%, 88%))}.teacher-sidebar .btn-change-password:hover:not(:disabled){background-color:var(--button-secondary-hover-bg, hsl(210, 15%, 90%));color:var(--button-secondary-hover-text, hsl(210, 10%, 20%))}.teacher-sidebar .btn-signout{background-color:transparent;border:1px solid var(--danger-color);color:var(--danger-color);font-weight:600}.teacher-sidebar .btn-signout:hover:not(:disabled){background-color:var(--danger-color);color:#fff;border-color:var(--danger-color)}.teacher-sidebar .btn-change-password .sidebar-icon svg,.teacher-sidebar .btn-signout .sidebar-icon svg{width:16px;height:16px}