:root{--color-primary: #10b981;--color-primary-rgb: 16, 185, 129;--color-primary-hover: #059669;--color-primary-hover-rgb: 5, 150, 105;--color-primary-soft: #d1fae5;--color-primary-soft-rgb: 209, 250, 229;--color-navy: #0d1b3d;--color-navy-rgb: 13, 27, 61;--color-bg-light: #f7faf9;--color-bg-dark: #0b1110;--color-surface-dark: #121a18;--color-surface-dark-rgb: 18, 26, 24;--color-surface-dark-raised: #18231f;--color-text-light: #0d1b3d;--color-text-dark: #f5f7fa;--color-border-light: #d8e3dd;--color-border-dark: rgba(148, 163, 184, 0.18);--color-white: #ffffff;--color-black: #000000;--bg: var(--color-bg-light);--surface: #ffffff;--surface-raised: #ffffff;--surface-subtle: #eef7f2;--field-bg: #ffffff;--card-bg: #ffffff;--bg-overlay: rgba(255, 255, 255, 0.92);--text: var(--color-text-light);--text-rgb: var(--color-navy-rgb);--text-muted: #52645f;--muted-text: var(--text-muted);--accent: var(--color-primary);--accent-rgb: var(--color-primary-rgb);--accent-hover: 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.nav-button{width:100%;justify-content:center;padding:1.15rem;font-size:1.05rem;border-radius:1.25rem}}.nav-button{padding:.65rem 1.6rem;border-radius:100px;font-weight:750;font-size:.9rem;text-decoration:none;display:flex;align-items:center;gap:.6rem;transition:all .4s cubic-bezier(0.16, 1, 0.3, 1);border:1.5px solid rgba(0,0,0,0)}.nav-button--register{color:var(--text);background:rgba(0,0,0,0);border-color:var(--border)}.nav-button--register:hover{background:var(--nav-link-hover-bg);border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}.nav-button--login{background:var(--accent-gradient);color:var(--accent-contrast);box-shadow:0 10px 25px -5px rgba(var(--accent-rgb), 0.5);border:1.5px solid hsla(0,0%,100%,.1)}.nav-button--login:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 16px 35px -8px rgba(var(--accent-rgb), 0.6);filter:saturate(1.2) brightness(1.05)}.nav-button--login:active{transform:translateY(0)}html:not(.dark) .nav-button--login{background:var(--accent-gradient)}.main-nav__user-avatar{height:44px;width:44px;border-radius:50%;object-fit:contain;object-position:center;display:block;border:1px solid hsla(0,0%,100%,.5);box-shadow:0 4px 10px rgba(0,0,0,.06);transition:all .4s cubic-bezier(0.34, 1.56, 0.64, 1)}html.dark .main-nav__user-avatar{border-color:hsla(0,0%,100%,.1);box-shadow:0 4px 10px rgba(0,0,0,.2)}.main-nav__user-avatar:hover{transform:scale(1.08);border-color:var(--accent);box-shadow:0 6px 15px rgba(var(--accent-rgb), 0.15)}.main-nav__test-info{display:none;align-items:center;gap:1.25rem;padding:.35rem 1rem;background:var(--glass-bg);border:1px solid var(--glass-border);border-radius:100px;margin:0 1.5rem;box-shadow:var(--shadow-sm);animation:slideDownFade .4s cubic-bezier(0.16, 1, 0.3, 1)}@media(max-width: 900px){.main-nav__test-info{gap:.75rem;margin:0 .75rem;padding:.3rem .7rem}}@media(max-width: 767.98px){.main-nav__test-info{display:none 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.nav-test-pause-btn{background:var(--accent);color:var(--color-white);border:none;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:.8rem;transition:all .3s cubic-bezier(0.175, 0.885, 0.32, 1.275);box-shadow:0 4px 12px rgba(var(--accent-rgb), 0.3);animation:buttonPopIn .5s cubic-bezier(0.34, 1.56, 0.64, 1) backwards;animation-delay:.2s}.main-nav .nav-test-pause-btn:hover{transform:scale(1.1) rotate(-10deg);background:var(--accent-hover);box-shadow:0 6px 16px rgba(var(--accent-rgb), 0.4)}.main-nav .nav-test-pause-btn:active{transform:scale(0.95)}@media(prefers-reduced-motion: reduce){.main-nav__hamburger,.main-nav__hamburger span,.main-nav__drawer,.main-nav__item,.nav-overlay{transition:none !important;animation:none !important}}.quiz-card{max-width:800px;margin:0 auto;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:3rem 2.5rem 2.5rem 2.5rem;box-shadow:var(--shadow-lg);animation:fadeInSlideUp .6s cubic-bezier(0.16, 1, 0.3, 1) forwards;transition:all .4s ease}@media(max-width: 768px){.quiz-card{padding:2rem 1.25rem 1.5rem 1.25rem}}.quiz-card__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;min-height:44px;gap:1.5rem;border-bottom:1px solid var(--subtle-border);padding-bottom:1.25rem}@media(max-width: 768px){.quiz-card__header{flex-direction:column;align-items:flex-start;gap:1rem;border-bottom:none;padding-bottom:.5rem;margin-bottom:1rem}}.quiz-card__header-left{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}.quiz-card__header-actions{display:flex;align-items:center;gap:.75rem;margin-left:auto}@media(max-width: 768px){.quiz-card__header-actions{width:100%;margin-left:0;justify-content:space-between}}.quiz-card__save-btn{background:var(--bg);border:1px solid var(--subtle-border);color:var(--muted-text);width:38px;height:38px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s cubic-bezier(0.4, 0, 0.2, 1);font-size:1.1rem;box-shadow:0 2px 8px rgba(0,0,0,.05)}.quiz-card__save-btn:hover{border-color:#ef4444;color:#ef4444;background:rgba(239,68,68,.05);transform:translateY(-2px);box-shadow:0 4px 12px rgba(239,68,68,.1)}.quiz-card__save-btn .fas.fa-heart{color:#ef4444}.quiz-card__save-btn:disabled{opacity:.5;cursor:not-allowed}.quiz-card__source{margin:-1.25rem 0 1.5rem;color:var(--muted-text);font-size:.85rem}.quiz-card__source i{margin-right:.35rem}.quiz-card__question-number{font-size:.9rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted-text);display:flex;align-items:center;gap:.75rem;margin:0}.quiz-card__id{font-family:var(--font-family-base);font-weight:500;color:var(--muted-text);font-size:.85rem;background:var(--bg);border:1px solid var(--subtle-border);padding:.35rem .75rem;border-radius:var(--radius-sm);display:inline-flex;align-items:center;gap:.4rem;box-shadow:0 2px 4px rgba(0,0,0,.02);transition:all .2s ease}.quiz-card__id::before{content:"#";opacity:.5;font-weight:800;color:var(--accent)}.quiz-card__image-container{margin-bottom:1.5rem;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--subtle-border);box-shadow:0 4px 12px rgba(0,0,0,.05)}.quiz-card__image{display:block;width:100%;height:auto;max-height:400px;object-fit:contain;background-color:var(--field-bg)}.quiz-card__question-text{font-size:1.15rem;font-weight:700;color:var(--text);line-height:1.5;margin:0 0 1.5rem 0}.quiz-card__answers{display:grid;gap:.75rem}.quiz-card__answers[data-answered=true] .quiz-card__answer{cursor:default;pointer-events:none}.quiz-card__answers[data-answered=true] .quiz-card__answer:hover{transform:none;box-shadow:none;border-color:var(--subtle-border)}.quiz-card__answers[data-answered=true] .quiz-card__answer--correct{border-color:rgba(34,197,94,.3)}.quiz-card__answers[data-answered=true] .quiz-card__answer--incorrect{border-color:rgba(239,68,68,.3)}.quiz-card__answer{display:flex;align-items:center;padding:.75rem 1rem;min-height:3.25rem;border:2px solid var(--subtle-border);border-radius:var(--radius-sm);cursor:pointer;transition:all .2s cubic-bezier(0.4, 0, 0.2, 1);position:relative;background:var(--bg);color:var(--text);font-weight:600;font-size:.95rem}.quiz-card__answer input[type=radio]{display:none}.quiz-card__answer-prefix{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:28px;height:28px;border-radius:var(--radius-sm);background:var(--field-bg);color:var(--muted-text);font-weight:800;margin-right:1rem;font-size:.8rem;transition:all .2s ease}.quiz-card__answer:hover{border-color:var(--accent);background:var(--field-bg);transform:translateY(-2px);box-shadow:0 4px 12px rgba(var(--accent-rgb), 0.1)}.quiz-card__answer:hover 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var(--space-5);box-shadow:none;display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);text-decoration:none;color:var(--text);font-weight:var(--font-weight-bold);transition:border-color .2s ease,box-shadow .2s ease}.search-picker-card i{color:var(--accent);font-size:var(--font-size-sm);transition:transform .2s ease}.search-picker-card:hover{border-color:rgba(var(--accent-rgb), 0.35);box-shadow:var(--shadow-accent-md)}.search-picker-card:hover i{transform:translateX(3px)}.settings-page{max-width:800px;margin:2rem auto 4rem;padding:0 1.5rem}.settings-accordion{display:flex;flex-direction:column;gap:1.5rem;margin:0 auto}.settings-card{background:hsla(0,0%,100%,.7);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid hsla(0,0%,100%,.8);border-radius:1.75rem;overflow:hidden;transition:all .4s cubic-bezier(0.4, 0, 0.2, 1);font-family:var(--font-family-base);box-shadow:0 4px 15px rgba(0,0,0,.03)}html.dark .settings-card{background:rgba(22,26,29,.6);border-color:hsla(0,0%,100%,.08);box-shadow:0 10px 30px rgba(0,0,0,.2)}.settings-card:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(0,0,0,.05)}.settings-card__header{display:flex;justify-content:space-between;align-items:center;padding:2rem;cursor:pointer;user-select:none;transition:background-color .3s ease}.settings-card__header:hover{background-color:rgba(var(--accent-rgb), 0.03)}@media(max-width: 576px){.settings-card__header{padding:1.25rem 1.5rem}}.settings-card__title-group{flex:1;display:flex;flex-direction:column;gap:.25rem}.settings-card__title{font-size:1.35rem;font-weight:700;margin:0;color:var(--text);display:flex;align-items:center;gap:.75rem}@media(max-width: 576px){.settings-card__title{font-size:1.15rem}}.settings-card__title i{color:var(--accent);background:rgba(var(--accent-rgb), 0.1);padding:8px;border-radius:10px;font-size:1.1rem}.settings-card__description{font-size:1rem;color:var(--muted-text);margin:0;opacity:.8;padding-left:2.75rem}@media(max-width: 576px){.settings-card__description{font-size:.9rem;padding-left:0;margin-top:.5rem}}.settings-card__icon{font-size:1.1rem;color:var(--muted-text);margin-left:1rem;transition:transform .5s cubic-bezier(0.34, 1.56, 0.64, 1);opacity:.5}.settings-card__content{max-height:0;opacity:0;padding:0 2rem;overflow:hidden;transition:max-height .5s cubic-bezier(0.4, 0, 0.2, 1),padding .5s ease,opacity .3s ease}@media(max-width: 576px){.settings-card__content{padding:0 1.5rem}}.settings-card__content form{max-width:500px;padding:1.5rem 0 2rem 2.75rem}@media(max-width: 576px){.settings-card__content form{padding-left:0}}.settings-card__content .info-card__message{background:rgba(var(--accent-rgb), 0.05);border:1px solid rgba(var(--accent-rgb), 0.1);padding:1.25rem;border-radius:1.25rem;margin:1rem 2.75rem 2rem 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li::before{content:"";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--accent);font-size:.7rem}.settings-card.is-open{border-color:rgba(var(--accent-rgb), 0.3)}.settings-card.is-open .settings-card__icon{transform:rotate(180deg);color:var(--accent);opacity:1}.settings-card.is-open .settings-card__content{max-height:1200px;opacity:1;padding-top:.75rem;padding-bottom:1rem}.settings-card.is-open .settings-card__header{background-color:rgba(var(--accent-rgb), 0.02)}.avatar-manager{max-width:500px;margin:0 auto;padding:.5rem 0 2rem 0}@media(max-width: 576px){.avatar-manager{padding-left:0}}.avatar-manager__preview{display:flex;flex-direction:column;align-items:center;gap:1.5rem}.avatar-manager__img-wrapper{position:relative;width:120px;height:120px;border-radius:50%;overflow:hidden;background:rgba(0,0,0,.05);border:3px solid hsla(0,0%,100%,.5);box-shadow:0 8px 24px rgba(0,0,0,.1)}html.dark .avatar-manager__img-wrapper{border-color:hsla(0,0%,100%,.1);background:hsla(0,0%,100%,.05)}.avatar-manager__img{width:100%;height:100%;object-fit:contain;object-position:center;display:block;transition:opacity .3s ease}.avatar-manager__spinner{position:absolute;top:50%;left:50%;transform:translate(-50%, -50%);font-size:2rem;color:var(--accent);opacity:0;transition:opacity .3s ease;z-index:2}.avatar-manager #avatar-loader.is-active .avatar-manager__img{opacity:.3;filter:blur(2px)}.avatar-manager #avatar-loader.is-active .avatar-manager__spinner{opacity:1}.avatar-manager__divider{display:flex;align-items:center;text-align:center;margin:2rem 0;color:var(--muted-text);font-size:.85rem;font-weight:600;letter-spacing:1px}.avatar-manager__divider::before,.avatar-manager__divider::after{content:"";flex:1;border-bottom:1px solid rgba(0,0,0,.1)}html.dark .avatar-manager__divider::before,html.dark .avatar-manager__divider::after{border-bottom-color:hsla(0,0%,100%,.1)}.avatar-manager__divider span{padding:0 1rem;opacity:.6}.avatar-manager__defaults-title{font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:1rem;text-align:center}.avatar-manager__grid{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.avatar-manager .default-avatar-btn{width:64px;height:64px;border-radius:50%;border:2px solid rgba(0,0,0,0);padding:0;background:rgba(0,0,0,0);cursor:pointer;overflow:hidden;transition:all .3s cubic-bezier(0.4, 0, 0.2, 1);box-shadow:0 4px 10px rgba(0,0,0,.05)}.avatar-manager .default-avatar-btn:hover{transform:scale(1.1) translateY(-2px);box-shadow:0 8px 15px rgba(var(--accent-rgb), 0.2);border-color:var(--accent)}.avatar-manager .default-avatar-btn img{width:100%;height:100%;object-fit:contain;object-position:center;display:block}.sheets-page{padding:var(--space-10) var(--space-6)}@media(max-width: 768px){.sheets-page{padding:var(--space-16) var(--space-4)}}.sheets-page__container{max-width:900px;margin:0 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var(--border);border-radius:var(--radius-pill);background:var(--surface);color:var(--text-muted);padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);transition:all .2s ease}.sheets-filters__btn:hover{border-color:rgba(var(--accent-rgb), 0.4);color:var(--accent)}.sheets-filters__btn:focus-visible{outline:none;border-color:var(--accent);box-shadow:var(--shadow-focus)}.sheets-filters__btn.is-active{background:var(--accent);border-color:var(--accent);color:var(--color-white)}@media(max-width: 576px){.sheets-filters{flex-direction:column;align-items:stretch}}.sheets-topic{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:0;box-shadow:var(--shadow-sm);overflow:hidden}.sheets-topic__header{appearance:none;border:0;background:rgba(0,0,0,0);color:inherit;font:inherit;padding:0;cursor:pointer;width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-5) var(--space-6);text-align:left}.sheets-topic__header:focus-visible{outline:none;border-color:var(--accent);box-shadow:var(--shadow-focus)}.sheets-topic__title{font-size:var(--font-size-xl);font-weight:var(--font-weight-bold);color:var(--text);margin:0}.sheets-topic__description{margin:var(--space-1) 0 0;color:var(--text-muted);font-size:var(--font-size-sm)}.sheets-topic__meta{display:flex;align-items:center;gap:var(--space-3);flex-shrink:0}.sheets-topic__arrow{color:var(--text-muted);transition:transform .25s ease}.sheets-topic__body{display:none;border-top:1px solid var(--subtle-border)}.sheets-topic__list{list-style:none;margin:0;padding:var(--space-3);display:flex;flex-direction:column;gap:var(--space-2)}.sheets-topic.is-open .sheets-topic__body{display:block}.sheets-topic.is-open .sheets-topic__arrow{transform:rotate(180deg)}.sheet-card{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-4) var(--space-5);border:1px solid var(--subtle-border);border-radius:var(--radius-md);background:var(--surface);text-decoration:none;color:var(--text);transition:border-color .2s ease,box-shadow .2s ease}.sheet-card:hover{border-color:rgba(var(--accent-rgb), 0.35);box-shadow:var(--shadow-accent-sm)}.sheet-card:hover .sheet-card__arrow{transform:translateX(3px);color:var(--accent)}.sheet-card__thumb{width:4.5rem;height:4.5rem;flex-shrink:0;border-radius:var(--radius-sm);object-fit:cover;background:var(--surface-subtle)}.sheet-card__thumb--placeholder{display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:var(--font-size-xl)}.sheet-card__main{display:flex;flex-direction:column;gap:var(--space-1);min-width:0;flex:1}.sheet-card__title{font-weight:var(--font-weight-semibold);font-size:var(--font-size-base);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.sheet-card__meta{display:flex;flex-wrap:wrap;gap:var(--space-3);color:var(--text-muted);font-size:var(--font-size-xs)}.sheet-card__meta-item{display:inline-flex;align-items:center;gap:var(--space-1)}.sheet-card__side{display:flex;align-items:center;gap:var(--space-3);flex-shrink:0}.sheet-card__note-badge{display:inline-flex;align-items:center;gap:var(--space-1);border-radius:var(--radius-pill);background:rgba(var(--accent-rgb), 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.75rem;font-size:var(--font-size-xs);font-weight:var(--font-weight-extrabold);letter-spacing:.05em;white-space:nowrap}.difficulty-badge--easy{background:var(--success-bg);border-color:var(--success-border);color:var(--success-text)}.difficulty-badge--medium{background:var(--warning-bg);border-color:var(--warning-border);color:var(--warning-text)}.difficulty-badge--hard{background:var(--danger-bg);border-color:var(--danger-border);color:var(--danger-text)}.sheet-detail__card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-8);box-shadow:var(--shadow-md);display:flex;flex-direction:column;gap:var(--space-5)}.sheet-detail__header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4)}@media(max-width: 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var(--subtle-border);padding-top:var(--space-4)}.sheet-note{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-8);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:var(--space-5)}.sheet-note__title{display:flex;align-items:center;gap:var(--space-3);margin:0;font-size:var(--font-size-xl);color:var(--text)}.sheet-note__title i{color:var(--accent)}.sheet-note__login-prompt{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-4);color:var(--text-muted)}.sheet-note__login-prompt p{margin:0}.sheet-note-form{display:flex;flex-direction:column;gap:var(--space-5)}.sheet-note-form__scale{border:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-3)}.sheet-note-form__label{font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--text-muted)}.sheet-note-form__field{display:flex;flex-direction:column;gap:var(--space-2)}.sheet-note-form__field textarea{background:var(--field-bg);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);padding:var(--space-3);font-size:var(--font-size-md);font-family:inherit;resize:vertical}.sheet-note-form__field textarea:focus{outline:none;border-color:var(--accent);box-shadow:var(--shadow-focus)}.sheet-note-form__actions{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-4)}.sheet-note-form__saved-at{color:var(--text-muted);font-size:var(--font-size-xs)}.sheet-preview{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:var(--space-6);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:var(--space-4)}.sheet-preview__title{display:flex;align-items:center;gap:var(--space-3);margin:0;font-size:var(--font-size-xl);color:var(--text)}.sheet-preview__title i{color:var(--accent)}.sheet-preview__frame{width:100%;height:70vh;min-height:420px;border:1px solid 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576px){.sheet-note-card__header{flex-direction:column}}.sheet-note-card__thumb{width:4rem;height:4rem;flex-shrink:0;border-radius:var(--radius-sm);object-fit:cover;background:var(--surface-subtle)}.sheet-note-card__thumb--placeholder{display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:var(--font-size-lg)}@media(max-width: 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.stats-card__locked-overlay{background:hsla(0,0%,100%,.3)}.stats-card__lock-icon{font-size:1.25rem;margin-bottom:1.5rem;background:var(--bg);width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 16px rgba(0,0,0,.06);color:var(--muted-text)}.stats-card__lock-text{font-weight:700;font-size:.85rem;color:var(--text-muted);margin-bottom:.5rem;max-width:250px}.stats-card__locked-overlay .stats-card__lock-text{font-size:1.1rem;color:var(--text);margin-bottom:2rem}.stats-card__unlock-progress{width:100%;max-width:200px}.stats-card__unlock-text{text-align:right;font-size:.75rem;margin-top:.25rem;color:var(--text-muted)}.stats-card__topic-badge{display:inline-block;padding:.35rem .85rem;border-radius:99px;background:linear-gradient(135deg, rgba(var(--accent-rgb), 0.1), rgba(var(--color-navy-rgb), 0.1));color:var(--accent);font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;border:1px solid rgba(var(--accent-rgb), 0.2);margin-right:.75rem;white-space:nowrap;vertical-align:middle;transition:all .3s ease}.stats-card__badge{padding:4px 10px;border-radius:8px;font-size:.75rem;font-weight:800;min-width:50px;text-align:center;flex-shrink:0;box-shadow:0 2px 8px rgba(0,0,0,.05)}.stats-card__badge--danger{background:rgba(239,68,68,.1);color:#ef4444;border:1px solid rgba(220,38,38,.1)}html.dark .stats-card__badge--danger{background:rgba(127,29,29,.4);color:#fca5a5;border-color:rgba(248,113,113,.3)}.stats-card__action{margin-top:1rem;text-align:center}.stats-card__lock-row{display:flex;align-items:flex-start;gap:.75rem;width:100%}.stats-card__lock-body{flex:1}.stats-card__topic-counts{text-align:right}.stats-card__topic-attempted{font-size:.7rem;color:var(--muted-text);font-weight:600;display:block;padding-right:4px}.stats-card__item-btn-group{display:flex;gap:.5rem;white-space:nowrap;flex-shrink:0}.stats-card__chart-container{height:250px;width:100%}.stats-card__score-value{margin-left:.5rem}.stats-card__empty-hint{font-size:.85rem;opacity:.7;margin-top:.5rem;font-style:italic}.stats-card__progress-label{font-size:.75rem;color:var(--muted-text);font-weight:700;margin:0;text-align:center}.stats-card__empty-progress{width:100%;max-width:250px;margin-top:1.5rem}.stats-card__progress-bar--sm{height:6px;background:var(--border);border-radius:3px;overflow:hidden}.stats-card__progress-bar--md{height:8px;background:rgba(var(--text-rgb), 0.1);border-radius:4px;overflow:hidden;margin-bottom:1rem}.stats-card__mastery-activity--mb{margin-bottom:.25rem}.stats-card__mastery-activity--sm{font-size:.75rem;opacity:.7;margin-top:0}.stats-card__title--no-margin{margin-bottom:0 !important}.stats-card__see-all-icon{font-size:.8em}.stats-card__heart-icon{color:var(--accent);margin-right:8px;margin-left:0}.stats-card__empty-title{font-weight:800;font-size:1.5rem;margin-bottom:1rem;color:var(--text)}.stats-card__empty-message{max-width:450px;margin-bottom:2rem;color:var(--muted-text);line-height:1.6}.stats-card__question-text--strong{font-weight:700;color:var(--text)}.sheet-notes-widget{display:flex;flex-direction:column;gap:var(--space-4)}.sheet-notes-widget__empty{color:var(--muted-text);font-size:var(--font-size-sm);line-height:1.6;margin:0}.sheet-notes-widget__stats{display:grid;grid-template-columns:repeat(3, 1fr);gap:var(--space-2);text-align:center}.sheet-notes-widget__stats strong{display:block;font-size:var(--font-size-xl);font-weight:var(--font-weight-black);color:var(--accent)}.sheet-notes-widget__stats span{font-size:var(--font-size-xs);color:var(--muted-text)}.sheet-notes-widget__subtitle{margin:0;font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--muted-text)}.sheet-notes-widget__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-2)}.sheet-notes-widget__item{display:flex;align-items:center;justify-content:space-between;gap:var(--space-2);font-size:var(--font-size-sm)}.sheet-notes-widget__item a{color:var(--text);text-decoration:none;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sheet-notes-widget__item a:hover{color:var(--accent)}.sheet-notes-widget__rating{flex-shrink:0;font-weight:var(--font-weight-bold);color:var(--accent)}.sheet-notes-widget__cta{align-self:flex-start}body.test-page{background-color:var(--bg);background-image:linear-gradient(180deg, rgba(var(--accent-rgb), 0.055), transparent 360px),linear-gradient(90deg, rgba(var(--color-navy-rgb), 0.035), transparent 42%);position:relative;min-height:100vh;overflow-x:clip}html.dark body.test-page{background-color:var(--bg);background-image:linear-gradient(180deg, rgba(var(--accent-rgb), 0.08), transparent 360px),linear-gradient(90deg, rgba(245, 247, 250, 0.025), transparent 42%)}body.test-page::before,body.test-page::after{content:"";position:fixed;width:600px;height:600px;border-radius:50%;filter:blur(120px);z-index:-1;opacity:.035;pointer-events:none;animation:float 20s infinite alternate}html.dark body.test-page::before,html.dark body.test-page::after{opacity:.025;filter:blur(150px)}body.test-page::before{top:10%;left:-200px;background:radial-gradient(circle, var(--accent), transparent 70%)}body.test-page::after{bottom:10%;right:-200px;background:radial-gradient(circle, var(--color-navy), transparent 70%)}body.test-page .stats-page__decorations{display:none}.test-container{max-width:850px;margin:2rem auto;padding:0;position:relative;z-index:5}.test-container .quiz-card{border-radius:var(--radius-lg);background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);margin-bottom:3rem;transition:transform .4s cubic-bezier(0.175, 0.885, 0.32, 1.275),box-shadow .4s ease}.test-container .quiz-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}.test-container--active{min-height:100vh}.test-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:8rem 2rem;min-height:400px;background:var(--surface);backdrop-filter:blur(12px);border-radius:var(--radius-lg);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);position:relative;overflow:hidden}.test-loading::before{content:"";position:absolute;width:200px;height:200px;background:radial-gradient(circle, var(--accent), transparent 70%);top:-100px;right:-100px;opacity:.1;z-index:-1}.test-loading h2{font-size:2rem;font-weight:900;color:var(--text);margin-bottom:1rem;letter-spacing:0}.test-loading p{font-size:1.1rem;color:var(--muted-text);max-width:400px}.test-loading .spinner{margin:3rem auto;width:60px;height:60px;border:5px solid rgba(var(--accent-rgb), 0.1);border-radius:50%;border-left-color:var(--accent);animation:spin .8s cubic-bezier(0.5, 0.1, 0.5, 0.9) infinite;box-shadow:0 0 20px rgba(var(--accent-rgb), 0.1)}#test-view{padding:0 1.5rem 3rem 1.5rem;background-color:rgba(0,0,0,0);border-radius:0}.test-header{position:sticky;top:100px;background:var(--surface);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:1.25rem 1.75rem;margin:0 0 3.5rem 0;border:1px solid var(--border);z-index:var(--z-sticky);display:flex;justify-content:space-between;align-items:center;gap:1.5rem;transition:all .4s cubic-bezier(0.16, 1, 0.3, 1)}body.test-scrolled-past-header .test-header{opacity:0;pointer-events:none;transform:translateY(-10px)}.test-header{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);animation:slideDown .5s cubic-bezier(0.175, 0.885, 0.32, 1.275);will-change:transform}.test-header__title{margin:0;font-size:1.1rem;font-weight:800;color:var(--text);display:flex;align-items:center;gap:.75rem}@media(max-width: 767.98px){.test-header__title{font-size:.95rem}}.test-header__title::before{content:"";width:8px;height:8px;background:var(--accent);border-radius:2px;box-shadow:0 0 10px var(--accent)}.test-header__content-left{display:flex;flex-direction:column;gap:.1rem;min-width:0;flex-shrink:0}.test-header--sticky{box-shadow:0 10px 30px rgba(0,0,0,.05)}@media(max-width: 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0.3)}.test-header__meta{display:flex;align-items:center;gap:1.5rem;flex-shrink:0}@media(max-width: 576px){.test-header__meta{gap:.75rem}}.test-header .timer{background:var(--surface-subtle);color:var(--accent);padding:.6rem 1.5rem;border-radius:var(--radius-sm);font-family:var(--font-main, "Outfit", sans-serif);font-weight:800;font-size:1.25rem;font-variant-numeric:tabular-nums;border:1px solid rgba(var(--accent-rgb), 0.15);display:flex;align-items:center;gap:.6rem;box-shadow:0 4px 12px rgba(0,0,0,.03)}@media(max-width: 576px){.test-header .timer{padding:.4rem 1rem;font-size:1.1rem}}.test-header .timer::before{content:"";font-family:"Font Awesome 6 Free";font-weight:900;font-size:.9em;opacity:.7}.test-header .timer--warning{background:rgba(239,68,68,.1);color:#ef4444;border-color:rgba(239,68,68,.2);animation:pulse-red 1s infinite alternate}.test-header__pause-btn{background:var(--surface-subtle);color:var(--accent);border:1px solid rgba(var(--accent-rgb), 0.15);width:48px;height:48px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s cubic-bezier(0.175, 0.885, 0.32, 1.275);font-size:1.1rem}@media(max-width: 576px){.test-header__pause-btn{width:40px;height:40px;border-radius:10px}}.test-header__pause-btn:hover{background:var(--accent);color:var(--accent-contrast);transform:scale(1.05);box-shadow:0 10px 20px rgba(var(--accent-rgb), 0.2)}.test-header__pause-btn i{transition:transform .3s ease}.test-header__pause-btn:hover i{transform:rotate(-15deg) scale(1.1)}.test-pause-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg-overlay);backdrop-filter:blur(25px);-webkit-backdrop-filter:blur(25px);z-index:var(--z-modal);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;animation:fadeIn .4s ease}.test-pause-overlay__content{background:var(--surface);padding:3.5rem 2.5rem;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-lg);max-width:500px;width:90%;animation:scaleIn .5s cubic-bezier(0.34, 1.56, 0.64, 1)}.test-pause-overlay__icon{font-size:3.5rem;color:var(--accent);margin-bottom:2rem;background:rgba(var(--accent-rgb), 0.1);width:110px;height:110px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-lg);margin-left:auto;margin-right:auto;border:2px dashed rgba(var(--accent-rgb), 0.3);animation:pulse-soft 2s infinite}.test-pause-overlay h2{font-size:2.2rem;font-weight:800;margin-bottom:1rem;color:var(--text);letter-spacing:0}.test-pause-overlay p{color:var(--muted-text);margin-bottom:2.5rem;font-size:1.15rem;line-height:1.6}.questions-wrapper--blurred{filter:blur(18px);opacity:.3;pointer-events:none;user-select:none;transition:all .5s ease}.test-footer{text-align:center;margin-top:5rem;padding:4rem 0;border-top:1px solid var(--subtle-border);position:relative;background-color:rgba(0,0,0,0)}.test-footer::before{content:"";position:absolute;top:-1px;left:50%;transform:translateX(-50%);width:60px;height:3px;background:var(--accent);border-radius:100px}.test-footer .btn--primary{padding:1rem 3rem;font-size:1.1rem;font-weight:800;box-shadow:0 15px 35px rgba(var(--accent-rgb), 0.25);border-radius:var(--radius-md)}.test-footer .btn--primary:hover{box-shadow:0 20px 45px rgba(var(--accent-rgb), 0.35);transform:translateY(-4px) scale(1.02)}.results-container{padding:2.5rem;text-align:center;background-color:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.results-container__title{font-size:2rem;margin-bottom:2rem}.results-container__actions{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--subtle-border);display:flex;justify-content:center;gap:1rem;flex-wrap:wrap}.results-container__stats-info{width:100%;text-align:center;margin-bottom:1.5rem;font-size:1rem;color:var(--muted-text);line-height:1.6}.results-container__stats-info a{color:var(--accent);font-weight:600;text-decoration:none}.results-container__stats-info a:hover{text-decoration:underline}.score-summary{display:grid;grid-template-columns:1.5fr 1fr;align-items:center;gap:3rem;max-width:600px;margin:0 auto 3.5rem auto;text-align:left}.score-circle{position:relative;display:grid;place-items:center;width:180px;height:180px;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--score) * 1%), rgba(var(--accent-rgb), 0.1) 0);justify-self:center;box-shadow:0 15px 35px rgba(var(--accent-rgb), 0.2)}html.dark .score-circle{background:conic-gradient(var(--accent) calc(var(--score) * 1%), rgba(var(--accent-rgb), 0.15) 0)}.score-circle::before{content:"";position:absolute;width:85%;height:85%;background:var(--surface);backdrop-filter:blur(10px);border-radius:50%;box-shadow:inset 0 4px 10px rgba(0,0,0,.05)}.score-circle__percent{position:relative;font-size:3.5rem;font-weight:900;background:linear-gradient(135deg, var(--accent) 0%, var(--color-navy) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:rgba(0,0,0,0);letter-spacing:0}.score-stats{display:flex;flex-direction:column;gap:1.5rem}.stat-item{display:flex;align-items:center;gap:1rem}.stat-item__icon{font-size:1.5rem;color:var(--muted-text);width:30px;text-align:center}.stat-item__label{font-size:1rem;color:var(--muted-text);margin:0}.stat-item__value{font-size:1.5rem;font-weight:700;color:var(--text);margin:0}.results-details .quiz-card{margin:0 auto 2.5rem auto;padding:2rem;box-shadow:none;border:1px solid var(--subtle-border)}.results-details .quiz-card__answer{cursor:default}.results-details .quiz-card__answer:hover--correct{border-color:var(--success-border);background:var(--success-bg);color:var(--success-text)}.results-details .quiz-card__answer:hover--incorrect{border-color:var(--error-border);background:var(--error-bg);color:var(--error-text)}.results-details .quiz-card__answer:hover--skipped{border-color:var(--warning-border);background:var(--warning-bg);color:var(--warning-text)}.results-details .quiz-card__answer:hover:not(.quiz-card__answer--correct):not(.quiz-card__answer--incorrect):not(.quiz-card__answer--skipped){background-color:var(--field-bg);border-color:var(--border)}.hidden{display:none !important}.questions-wrapper .quiz-card,.results-details .quiz-card{border-radius:var(--radius-lg);background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow);margin:0 auto 3rem auto;transition:transform .4s cubic-bezier(0.175, 0.885, 0.32, 1.275),box-shadow .4s ease}.questions-wrapper .quiz-card:hover,.results-details .quiz-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}.questions-wrapper .quiz-card__header,.results-details .quiz-card__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--subtle-border)}.questions-wrapper .quiz-card__question-number,.results-details .quiz-card__question-number{font-size:.9rem;font-weight:600;color:var(--muted-text)}.quiz-card__answer--correct{border-color:var(--success-border) !important;background:var(--success-bg) !important}.quiz-card__answer--correct .quiz-card__answer-text{color:var(--success-text) !important;font-weight:600}.quiz-card__answer--correct .quiz-card__answer-prefix{background-color:var(--success) !important;color:var(--color-white) !important;border-color:var(--success) !important}.btn--secondary.btn--small{padding:.5rem 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.quiz-card__answer-text{color:var(--text);font-weight:600}.centered{display:flex;margin-top:1rem;justify-content:center;width:100%}.text-center{text-align:center}.text-success{color:var(--success) !important}.text-danger{color:var(--error) !important}.file-input--hidden{display:none}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border:0}.centered--push-down{display:flex;margin-top:4rem;margin-bottom:4rem;justify-content:center;width:100%}.text-gradient{background-image:var(--brand-gradient);-webkit-background-clip:text;background-clip:text;color:rgba(0,0,0,0)}.sparkling{font-size:17px;display:inline-block;animation:sparkle 1.5s infinite ease-in-out}.link{color:var(--muted-text);text-decoration:none;font-weight:400}.link:hover{text-decoration:underline}