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#2a2a2a);transition:var(--transition-normal)}.panel--analytics .reading-heatmap .heatmap-week .heatmap-day.active{background:var(--color-success, #22c55e)}.panel--analytics .reading-heatmap .heatmap-week .heatmap-day:hover{transform:scale(1.2)}.header{display:grid;grid-template-columns:1fr 3fr 1fr;padding:var(--spacing-sm) var(--spacing-md);background:var(--color-primary);color:var(--bg-white);box-shadow:var(--shadow-extra);border-radius:0 0 10px 10px;align-items:center}.header--desktop{grid-template-columns:auto 1fr auto;padding:var(--spacing-md) var(--spacing-md) var(--spacing-xs)}.header .config-btn{background-color:var(--gray-50);color:var(--text-primary);font-weight:700}@media (max-width: 1279px){.header{position:fixed;top:0;left:0;width:100%;z-index:1000;transform:translateY(0);transition:transform .2s ease;will-change:transform}.header--hidden{transform:translateY(-100%)}}@media (max-width: 1279px) and (prefers-reduced-motion: reduce){.header{transition:none}}.native .header{position:static;top:auto;left:auto;width:auto;z-index:auto;transform:none}.header-section{display:flex;align-items:center}.header-section.streak-section{justify-content:flex-start}.header-section.streak-section .streak-display{display:flex;border:1px solid var(--border-dark);border-radius:8px;padding:.7rem .5rem;background-color:var(--color-action);align-items:center;gap:var(--spacing-xs);color:var(--text-white);font-weight:700}.header-section.streak-section .streak-icon{font-size:1.25rem;line-height:1}.header-section.streak-section .streak-count{font-size:1rem;line-height:1;min-width:1ch;text-align:left}.header-section.logo-section{pointer-events:none;justify-content:center}.header-section.logo-section h1.logo-text{margin:0;line-height:1;font-size:1.5rem}.header-section.logo-section .header-logo-link{pointer-events:auto;text-decoration:none;color:var(--text-white);display:inline-flex;align-items:center}.header-section.user-section{justify-self:flex-end;font-size:2rem}.header-section.user-section .log-in-btn{font-size:var(--font-2xl);padding:0;margin:0;border:none;background-color:inherit}.header .toast-notification{position:fixed;top:150px;left:50%;transform:translate(-50%,-50%);background:#000;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);color:var(--text-white);padding:var(--spacing-lg) var(--spacing-xl);border-radius:12px;border:1px solid rgba(255,255,255,.2);box-shadow:0 8px 32px #0003,0 4px 16px rgba(var(--color-success-rgb),.3),inset 0 1px #fff3;z-index:10000;animation:toastFadeInCenter .3s ease-out;font-weight:500;font-size:var(--font-md);text-align:center;max-width:80vw;opacity:1;pointer-events:none;overflow:hidden;--toast-duration: 2s}.header .toast-notification:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;animation:headerToastProgress var(--toast-duration) linear}.header .toast-notification.show{opacity:1;transform:translate(-50%,-50%) scale(1)}@keyframes toastFadeInCenter{0%{opacity:0;transform:translate(-50%,-50%) scale(.8)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes headerToastProgress{0%{width:100%}to{width:0%}}.header--desktop .header-topbar{grid-column:1/-1;width:100%;display:flex;align-items:center;justify-content:center;margin-top:calc(var(--spacing-xs) * -1)}.header--desktop .header-section--left{justify-self:flex-start}.header--desktop .header-section--center{justify-self:center;flex:1;position:relative}.header--desktop .header-section--right{justify-self:flex-end;display:flex;align-items:flex-start;gap:var(--spacing-md)}.header--desktop .header-nav-main{display:flex;align-items:center;justify-content:center;gap:var(--spacing-lg);width:100%}.header--desktop .header-nav-item-wrapper{position:relative;display:flex;flex-direction:column;align-items:center}.header--desktop .header-nav-item{display:flex;align-items:center;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-medium);text-decoration:none;color:var(--text-white);font-weight:500;font-size:var(--font-sm);transition:var(--transition-normal);min-width:80px;justify-content:center}.header--desktop .header-nav-item:hover{background:#ffffff1a;transform:translateY(-2px)}.header--desktop .header-nav-item--active{background:#fff3;font-weight:600}.header--desktop .header-nav-item__label{font-size:var(--font-sm);line-height:1}.header--desktop .header-nav-submenu{position:absolute;top:100%;left:50%;transform:translate(-50%);background:var(--color-primary);border:1px solid var(--border-dark);border-radius:0 0 1rem 1rem;box-shadow:var(--shadow-large);min-width:120px;z-index:1000;opacity:0;visibility:hidden;transition:all .2s ease-out;margin-top:var(--spacing-xs)}.header--desktop .header-nav-submenu--visible{opacity:1;visibility:visible}.header--desktop .header-nav-submenu-item{display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border-light);border-radius:var(--radius-small);color:var(--text-white);font-size:var(--font-xs);font-weight:700;transition:var(--transition-fast);white-space:nowrap}.header--desktop .header-nav-submenu-item:hover{background:#fff3;transform:translateY(-1px)}.header--desktop .header-status{display:flex;align-items:center}.header--desktop .status-badge{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-small);font-size:var(--font-xs);font-weight:600}.header--desktop .status-badge--offline{background:#ffe8a1;color:#6b4e00}.header--desktop .header-user{position:relative}.header--desktop .header-user-btn{font-size:var(--font-xl);position:relative;padding:0;min-width:44px;min-height:44px}.header--desktop .header-user-btn .avatar-display{width:100%;height:100%;border-radius:50%}.header--desktop .header-user-btn .avatar-display.avatar-display--small,.header--desktop .header-user-btn .avatar-display .avatar-display__image,.header--desktop .header-user-btn .avatar-display .avatar-display__letter{width:100%;height:100%}.header--desktop .header-user-menu{position:absolute;top:100%;right:0;margin-top:var(--spacing-sm);background:var(--bg-primary);border:1px solid var(--border-light);border-radius:var(--radius-medium);box-shadow:var(--shadow-large);padding:var(--spacing-sm) 0;min-width:180px;z-index:1000;animation:fadeInDown .2s ease-out}.header--desktop .header-user-menu-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);text-decoration:none;font-size:var(--font-sm);width:100%;border:none;background:none;cursor:pointer;transition:var(--transition-fast)}.header--desktop .header-user-menu-item:hover{background:var(--bg-secondary)}.header--desktop .header-user-menu-item--action{color:var(--text-primary)}.header--desktop .header-user-menu-item--action:hover{background:var(--color-danger-light)}.header--desktop .header-user-menu-item__icon{font-size:1rem;width:1.2em;text-align:center}.header--desktop .header-user-menu-divider{border:none;border-top:1px solid var(--border-light);margin:var(--spacing-xs) 0}.header--desktop .header-section--left .streak-display{cursor:pointer;display:flex;border:1px solid var(--border-dark);border-radius:8px;padding:.7rem .5rem;background-color:var(--color-action);align-items:center;gap:var(--spacing-xs);color:var(--text-white);font-weight:700}.header--desktop .header-section--left .streak-display .streak-icon{font-size:1.25rem;line-height:1}.header--desktop .header-section--left .streak-display .streak-icon[src]{width:20px;height:20px;object-fit:contain;filter:brightness(1.1)}.header--desktop .header-section--left .streak-display .streak-count{font-size:1rem;line-height:1;min-width:1ch;text-align:left}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.main-navigation{width:100%;height:var(--navigation-height);background:var(--bg-dark);color:#fff;overflow:visible;position:fixed;bottom:0;left:0;z-index:100;flex-shrink:0;box-shadow:0 -2px 10px var(--black-20);border-top:1px solid var(--border-medium);transform:translateY(0);transition:transform .2s ease}.main-navigation-menu{display:flex;flex-direction:row;list-style:none;margin:0;padding:0;width:100%;justify-content:space-between;align-items:center}.main-navigation-menu li{margin-bottom:0;flex:1;display:flex;justify-content:center}.main-navigation-menu a{color:var(--text-muted);text-decoration:none;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:var(--spacing-sm) .3rem;border-radius:var(--radius-medium);transition:all .3s ease;position:relative;white-space:nowrap;width:100%;min-width:0;max-width:100%;gap:.25rem;flex:1 1 0}.main-navigation-menu a span{display:flex;justify-content:center}.main-navigation-menu a.active{background:var(--color-primary);color:var(--text-white);font-weight:700;outline:2px solid var(--color-primary);outline-offset:2px;box-shadow:0 0 0 2px var(--focus-ring)}.main-navigation-menu a.active .main-navigation-icon .nav-icon-img{filter:brightness(1.2) contrast(1.1)}.main-navigation-logo{display:none}.main-navigation-content{display:flex;justify-content:space-between;flex-direction:row;width:100%;height:var(--navigation-height);position:relative;overflow:hidden;align-items:center;padding:.8rem .5rem}.main-navigation-icon{font-size:1.4rem;min-width:24px;text-align:center;display:block}.main-navigation-icon .nav-icon-img{text-align:bottom;justify-content:flex-end;align-items:flex-end;align-self:flex-end;justify-self:flex-end;width:25px;height:25px;margin:5px 0 0;padding:0;object-fit:contain;filter:brightness(.7);transition:var(--transition-fast)}.main-navigation-text{opacity:1;width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.7rem;text-align:center;max-width:100%;font-weight:700;position:relative;display:flex;align-items:center;justify-content:center;gap:.25rem}.main-navigation .nav-count{background:var(--accent-primary);color:#fff;font-size:.6rem;font-weight:600;padding:.1rem .35rem;border-radius:10px;min-width:1.2rem;height:1.2rem;display:inline-flex;align-items:center;justify-content:center;line-height:1;margin-left:.2rem}.main-navigation--hidden{transform:translateY(100%)}@media (prefers-reduced-motion: reduce){.main-navigation{transition:none}}.user-info{display:flex;align-items:center;gap:.5rem;padding:.25rem;color:#fff;font-size:.8rem}.user-icon{font-size:1rem}.user-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.logout-button{display:flex;align-items:center;gap:.5rem;padding:.5rem;background:transparent;border:1px solid var(--border-medium);border-radius:4px;color:#fff;font-size:.8rem;cursor:pointer;transition:all .2s ease}.logout-button:hover{background:var(--red-dark);border-color:var(--red-medium)}.logout-icon{font-size:.9rem}.logout-text{font-weight:500}.auth-navigation{display:flex;flex-direction:column;gap:1rem;padding:1rem;height:100%;justify-content:center}.auth-nav-link{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;background:transparent;border:2px solid var(--border-medium);border-radius:8px;color:#fff;text-decoration:none;transition:all .2s ease;font-weight:600}.auth-nav-link:hover{background:#ffffff1a;border-color:var(--primary-medium);color:var(--primary-light)}.auth-nav-link.active{background:var(--primary-medium);border-color:var(--primary-medium);color:#fff}.auth-nav-icon{font-size:1.2rem}.auth-nav-text{font-size:.9rem}.dashboard-sidebar{display:flex;display:none;flex-direction:column;justify-content:flex-start;align-items:center;text-align:center;position:fixed;right:0;top:0;height:100vh;overflow-y:auto;z-index:100;width:300px;gap:1rem;padding:1rem;background:var(--bg-light);flex-shrink:0;border-left:1px solid var(--border-dark)}.dashboard-sidebar-section{background:var(--bg-white);margin-bottom:1.5rem;height:auto;width:16rem;padding:1rem;border-radius:8px;box-shadow:0 1px 3px var(--black-10)}.dashboard-sidebar-header{display:flex;justify-content:space-between}.story-card-container{width:100%}.panel--story{display:flex;flex-direction:column;gap:var(--spacing-md);position:relative;overflow:hidden;height:100%}.panel--story.read{border:2px solid black;background-color:var(--color-success-light);opacity:.9}.panel--story__header{display:flex;justify-content:space-between;align-items:center;padding:0}.panel--story__header .action-group{padding:0}.panel--story__header .story-card-read-indicator-btn{color:var(--color-success);font-weight:700;font-size:var(--font-lg)}.panel--story__main{display:flex;flex-direction:column;gap:.5rem;margin-bottom:var(--spacing-sm);width:100%;min-width:0}.panel--story__main--clickable{text-decoration:none;color:inherit;border-radius:var(--border-radius);background-color:inherit;padding:var(--spacing-xs);margin:calc(-1 * var(--spacing-xs));transition:background-color .2s ease}.panel--story__main--clickable:focus{outline:2px solid var(--accent-color);outline-offset:2px;text-decoration:none}.panel--story__title{display:block;font-size:var(--font-3xl);font-weight:600;color:var(--text-primary);margin:0;line-height:1.3;-webkit-hyphens:auto;-ms-hyphens:auto;hyphens:auto;word-wrap:break-word;overflow-wrap:break-word;word-break:break-word;min-width:0}.panel--story__content{font-family:Georgia,Times New Roman,Times,serif;font-size:var(--font-base);line-height:1.4;font-style:italic;-webkit-hyphens:auto;-ms-hyphens:auto;hyphens:auto;word-wrap:break-word;overflow-wrap:break-word;word-break:break-word;min-width:0}.panel--story__footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto}.story-card-actions{display:flex;gap:var(--spacing-xs);align-items:center}.story-card-actions .btn{flex-shrink:0}.story-card-actions .story-card-lesson-btn{display:flex;flex-direction:column;font-size:var(--font-sm);white-space:nowrap}.story-card-actions .story-card-lesson-btn:hover{background-color:var(--accent-color);color:var(--text-white);text-decoration:none}.story-card-actions .story-card-lesson-btn:focus{outline:2px solid var(--accent-color);outline-offset:2px}.flashcard-controls-section{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md)}.action-group--flashcard{-webkit-user-select:none;user-select:none}.action-group--flashcard .mode-btn{width:6rem}.action-group--flashcard .btn--primary.control-btn{display:flex;flex-direction:column;cursor:pointer;border-radius:8px;font-size:var(--font-base);min-width:3.5rem;min-height:3rem;transition:all .3s ease;line-height:.8;padding:.5rem .25rem;gap:.125rem}.action-group--flashcard .btn--primary.control-btn.last-pressed{border:2px solid var(--content-primary);box-shadow:0 0 0 1px #2c3e504d}.action-group--flashcard .btn--primary.control-btn .schedule-time{font-size:.75rem;font-weight:600;line-height:1;opacity:.9;text-align:center;min-height:.75rem;display:flex;align-items:center;justify-content:center}.action-group--flashcard .btn--primary.control-btn span:last-child{font-size:.8rem;font-weight:500;line-height:1;text-align:center}.action-group--flashcard .btn--primary.again-btn{background:var(--color-error)}.action-group--flashcard .btn--primary.again-btn:active{background:var(--color-error);filter:brightness(.8)}.action-group--flashcard .btn--primary.hard-btn{background:var(--color-warning)}.action-group--flashcard .btn--primary.hard-btn:active{background:var(--color-warning);filter:brightness(.8)}.action-group--flashcard .btn--primary.good-btn{background:var(--color-action)}.action-group--flashcard .btn--primary.good-btn:active{background:var(--color-success-hover);filter:brightness(.95)}.action-group--flashcard .btn--primary.easy-btn{background:var(--color-success)}.action-group--flashcard .btn--primary.easy-btn:active{background:var(--color-info);filter:brightness(.8)}.action-group--flashcard .btn--primary.disabled{opacity:.5;cursor:not-allowed;filter:grayscale(.5)}.action-group--flashcard .btn--primary.disabled:hover,.action-group--flashcard .btn--primary.disabled:active{transform:none;filter:grayscale(.5)}.auto-speed-controls{display:flex;align-items:center;justify-content:center;border-radius:8px;width:100%;padding:var(--spacing-sm);border:1px solid var(--border-medium);transition:all .3s ease}.auto-speed-controls .speed-buttons{display:flex;flex-direction:row;justify-content:space-around;align-items:center;border:none;border-radius:0;background:transparent;min-height:auto;width:100%}.auto-speed-controls .auto-speed-btn{width:5rem}.control-btn.last-pressed{border:2px solid var(--content-primary);box-shadow:0 0 0 1px #2c3e504d}.flashcard-main-text{font-size:var(--font-4xl);font-weight:700;color:var(--text-primary);line-height:1.2;text-align:center}.flashcard-translation{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-sm)}.flashcard-translation-text{font-size:var(--font-4xl);color:var(--text-primary);font-weight:700;text-align:center}.flashcard-example{font-size:var(--font-xl);color:var(--gray-600);font-style:italic;line-height:1.4;font-weight:400;text-align:center;margin-top:var(--spacing-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}.flashcard-gender-indicator{position:absolute;display:flex;align-items:center;justify-content:center;top:.5rem;left:.5rem;z-index:10}.flashcard-counter{color:var(--gray-600);font-size:var(--font-base);margin-bottom:var(--spacing-md)}.flashcard-counter.srs-breakdown{display:flex;gap:var(--spacing-sm);justify-content:center;flex-wrap:wrap}.srs-stat{font-size:var(--font-sm);font-weight:500;padding:.25rem .5rem;border-radius:4px;white-space:nowrap}.srs-stat.new{background:var(--color-success);color:#fff}.srs-stat.learning{background:var(--color-warning);color:var(--gray-900)}.srs-stat.review{background:#000;color:#fff}.srs-stat.total{background:var(--gray-200);color:var(--gray-700)}.flashcard-display-section .btn.auto-mode-toggle-btn{position:absolute;align-self:flex-end;opacity:1}.deck-info{text-align:center;width:100%}.deck-info .deck-name{background-color:var(--bg-secondary);font-size:var(--font-md);color:var(--color-text-secondary);display:inline-block;padding:.2rem .5rem;border-radius:var(--border-radius-sm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;box-shadow:var(--shadow-medium)}.deck-info .deck-name .deck-icon{margin-right:.35rem}.flashcard-display-section>.deck-info,.flashcard-display-section>.deck-info--flashcard{position:static;inset:auto;transform:none;text-align:center;width:100%}.panel--flashcard__content{position:relative;width:100%;height:100%;display:flex;flex-direction:column;padding:var(--spacing-md)}.panel--flashcard__content:after{content:"";display:block;width:75%;height:3px;background:var(--border-medium);border-radius:2px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2}.panel--flashcard__question{position:absolute;top:2rem;left:1rem;right:1rem;bottom:50%;display:flex;align-items:center;justify-content:center;z-index:1}.panel--flashcard__answer{position:absolute;top:50%;left:1rem;right:1rem;bottom:2rem;display:flex;align-items:center;justify-content:center;z-index:1}.swipe-indicator{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--black-80);color:#fff;padding:var(--spacing-md) 1.5rem;border-radius:var(--radius-medium);font-size:var(--font-xl);font-weight:600;pointer-events:none;z-index:10;transition:opacity .2s ease}.swipe-indicator-easy{background:var(--color-info);color:#fff}.swipe-indicator-hard{background:var(--color-warning);color:var(--gray-900)}.swipe-indicator-good{background:var(--color-success);color:#fff}.swipe-indicator-again{background:var(--color-error);color:#fff}.flashcard-controls-panel .action-group--flashcard{display:grid;grid-template-columns:repeat(3,1fr);justify-content:space-around;padding:var(--spacing-sm) 0;gap:.5rem;min-height:4rem}.flashcard-controls-panel .action-group--flashcard .btn--primary.control-btn{min-width:3.75rem;max-width:none;flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center}.flashcard-instructions,.flashcard-suspend-instructions{text-align:center;color:var(--gray-600);font-size:var(--font-sm);margin:var(--spacing-sm) 0;font-style:italic}.flashcard-instructions p,.flashcard-suspend-instructions p{margin:.25rem 0}.flashcard-instructions p.scroll-protection-hint,.flashcard-suspend-instructions p.scroll-protection-hint{display:block;background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:var(--radius-small);padding:var(--spacing-xs);margin-top:var(--spacing-sm);color:var(--gray-700);font-style:normal}.flashcard-instructions p.scroll-protection-hint small,.flashcard-suspend-instructions p.scroll-protection-hint small{font-size:.8em}.flashcard-instructions--rating{margin:0}.flashcard-instructions--rating p:last-child{display:none}.flashcard-suspend-section{display:flex;flex-direction:column;align-items:center;gap:0}.flashcard-suspend-section .flashcard-buttons-row{display:flex;flex-direction:row;gap:.75rem;align-items:center}.flashcard-suspend-section .btn--suspend{background:var(--gray-900);color:#fff;font-weight:700;border:1px solid var(--border-dark);padding:.5rem .75rem}@media (hover: hover) and (pointer: fine){.flashcard-suspend-section .btn--save-word:hover{background:var(--color-action-hover)}}.flashcard-suspend-section .btn--save-word.is-saved,.flashcard-suspend-section .btn--save-word:disabled{background:var(--bg-muted, var(--gray-700));color:var(--text-disabled, var(--gray-300));cursor:not-allowed;border-color:var(--border-dark)}.auto-mode-indicator{text-align:center;color:var(--gray-600);font-size:var(--font-sm);font-weight:500;margin:var(--spacing-sm) 0}.auto-mode-indicator span{display:none;color:var(--gray-600);font-size:var(--font-sm)}.flashcard-error{display:flex;align-items:center;justify-content:center;min-height:300px;background:var(--danger-light, var(--error-light-bg));border:2px solid var(--danger, var(--color-error));border-radius:var(--radius-medium);padding:var(--spacing-xl);margin:var(--spacing-md) 0}.flashcard-error-content{text-align:center;max-width:500px;width:100%;color:var(--danger, var(--color-error))}.flashcard-error-content 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.typewriter-text{display:inline;overflow:visible;text-overflow:unset;white-space:normal;max-width:100%;width:100%;position:relative;z-index:1;word-wrap:break-word;color:var(--text-primary)}.panel--story-vocab-test__progress{padding:var(--spacing-md);border-top:1px solid var(--gray-200);display:flex;justify-content:space-between;align-items:center;font-weight:700}.focus-mode-popup .action-group{gap:var(--spacing-md)}.focus-mode-popup .modal-popup__content{overflow-y:auto;-webkit-mask-image:linear-gradient(to bottom,black 80%,transparent 100%);mask-image:linear-gradient(to bottom,black 80%,transparent 100%)}.btn.focus-translation-btn{background-color:transparent;border:0;font-size:var(--font-6xl);height:44px;width:44px;margin-top:-4px}.btn.focus-translation-btn:disabled{opacity:.1;cursor:not-allowed;filter:grayscale(.3)}.focus-story-text p{margin-bottom:var(--spacing-lg);color:var(--color-dark);font-size:1.2rem;text-align:left}.hyperfocus-modal__popup .action-group--spaced 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var(--black-10);color:var(--gray-700);font-family:monospace;font-size:.8rem;font-weight:600;line-height:1;padding:var(--spacing-xs) .4rem;white-space:nowrap;margin:0 .2rem}.story-content.learning-mode{display:flex;flex-direction:column;text-align:center;gap:.5rem}.learning-mode-content-container{display:flex;flex-direction:column;gap:var(--spacing-md)}.learning-mode .flashcard-title{color:var(--color-dark);font-size:1.8rem;font-weight:600;text-align:center;margin-top:var(--spacing-lg);margin-bottom:var(--spacing-xl);padding-bottom:1.4rem;border-bottom:2px solid var(--gray-200)}.story-content .flashcard-panels-container{display:flex;justify-content:center}.flashcard-top-controls{display:flex;flex-direction:column;justify-content:center;align-content:center;align-items:stretch;gap:var(--spacing-xl);margin:var(--spacing-md) 0 .5rem;flex-wrap:wrap}.story-content.learning-mode .speed-buttons{display:flex;flex-direction:row}.story-content .auto-speed-controls{display:flex;flex-direction:row;border:none;background:var(--bg-lighter);border-radius:var(--radius-medium);padding:var(--spacing-sm);margin-bottom:0;border:1px solid var(--border-light)}.story-content .flashcard-display{margin-bottom:7rem}.flashcard-instructions p:last-child{display:none}.auto-mode-indicator span{display:none}.vocabulary-hidden{background:var(--gray-50);color:transparent;border:2px dashed var(--gray-300);border-radius:4px;padding:0;width:4rem;height:2rem;display:inline-block;cursor:pointer;position:relative;white-space:nowrap}.vocabulary-hidden:before{content:"___";color:var(--gray-500);position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-weight:400;letter-spacing:2px}.vocabulary-revealed{color:var(--color-success);font-weight:500;white-space:nowrap}.vocabulary-revealed-saved{background:var(--color-success-light);color:var(--color-success);border-color:var(--material-green)}.vocabulary-word-selected{border:2px solid 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.quiz-answer-btn{display:flex;position:relative;flex:1;align-items:center;justify-content:center;text-align:center;border:3px solid var(--border-strong);background:var(--bg-primary);font-size:var(--font-base);color:var(--text-dark-blue);font-weight:700;transition:background-color .3s ease,border-color .3s ease,color .3s ease,opacity .3s ease}.panel--study-quiz__answer .quiz-answer-btn.long-text{white-space:normal;text-overflow:ellipsis}.panel--study-quiz__answer .quiz-answer-btn.selected{color:var(--text-white);background:var(--color-action-light);border-color:var(--primary, var(--color-primary))}.panel--study-quiz__answer .quiz-answer-btn.correct{color:var(--text-white);background:var(--success, var(--color-success));border-color:var(--success, var(--color-success));opacity:1}.panel--study-quiz__answer .quiz-answer-btn.incorrect{color:var(--text-white);background:var(--danger, var(--color-error));border-color:var(--danger, var(--color-error));opacity:1}.panel--study-quiz__answer .quiz-answer-btn.disabled{opacity:.3;cursor:not-allowed}.panel--study-quiz__answer .quiz-answer-btn:disabled{cursor:not-allowed}.panel--study-quiz__answer .quiz-answer-btn .keyboard-shortcut{position:absolute;top:6px;left:10px;font-size:var(--font-xs);color:var(--text-muted, var(--gray-600));opacity:.7}.panel--study-quiz__answer .quiz-answer-btn .answer-text{display:flex;justify-content:center}.panel--study-quiz__answer .quiz-answer-btn.selected .keyboard-shortcut,.panel--study-quiz__answer .quiz-answer-btn.correct .keyboard-shortcut,.panel--study-quiz__answer .quiz-answer-btn.incorrect .keyboard-shortcut{color:var(--white-80)}.panel--study-quiz__answer .grid-2x2 .quiz-answer-btn-1{border-radius:0 0 30px;border-top:none;border-left:none}.panel--study-quiz__answer .grid-2x2 .quiz-answer-btn-2{border-radius:0 0 0 30px;border-top:none;border-right:none}.panel--study-quiz__answer .grid-2x2 .quiz-answer-btn-3{border-radius:0 30px 0 12px;border-bottom:none;border-left:none}.panel--study-quiz__answer .grid-2x2 .quiz-answer-btn-4{border-radius:30px 0 12px;border-bottom:none;border-right:none}.panel--study-quiz__answer .quiz-answer-container.row .quiz-answer-btn-1{border-radius:0 0 30px 12px;border-top:none;border-left:none}.panel--study-quiz__answer .quiz-answer-container.row .quiz-answer-btn-2{border-radius:0 0 30px 30px;border-top:none}.panel--study-quiz__answer .quiz-answer-container.row .quiz-answer-btn-3{border-radius:0 0 12px 30px;border-top:none;border-right:none}.game-status-display{display:flex;justify-content:center;height:5rem;position:relative;transition:var(--transition-fast)}.game-status-display:empty{display:none}.game-status-display.previous-answer-correct{animation:answerFeedbackCorrect 1s ease-in-out forwards}.game-status-display.previous-answer-incorrect{animation:answerFeedbackIncorrect 1s ease-in-out forwards}.game-status-display.lightning-mode .lives-display{position:absolute;display:flex;flex-direction:row;align-self:center;right:0;margin-right:.8rem}.game-status-display.critical-time{animation:urgentPulse .5s infinite alternate;background:linear-gradient(135deg,#ff9100,#fff700);border-color:var(--lightning-red);box-shadow:0 0 30px var(--red-light-alpha-60)}.timer-display{position:relative;display:flex;align-items:center;align-self:center;height:3.5rem;gap:1rem;background-color:var(--color-action);border:1px solid var(--border-dark);border-radius:8px;padding:var(--spacing-lg);box-shadow:var(--shadow-heavy)}.timer-display.lightning-timer{background:linear-gradient(135deg,#7f5fff,#ff3cac);border:2px solid var(--color-action-light);border-radius:50%;width:4rem;height:4rem;padding:0;overflow:visible;justify-content:center}.timer-display.lightning-timer .timer-text{background-color:transparent;border:none;color:var(--text-white);font-size:1.2rem;font-weight:900;text-shadow:0 0 10px var(--white-80);min-width:auto;padding:0}.timer-text{background-color:var(--bg-primary);font-weight:700;font-size:var(--font-3xl);border:1px solid var(--border-dark);min-width:50px;padding:.5rem}.lightning-heart{animation:lightningPulse 1.2s ease-in-out infinite;-webkit-user-select:none;user-select:none;pointer-events:none}.lightning-bolt{position:absolute;font-size:1.5rem;color:var(--lightning-yellow);text-shadow:0 0 10px var(--lightning-yellow);animation:lightningBolt 2s infinite;pointer-events:none}.lightning-bolt.lightning-bolt-1{top:-10px;right:-10px;animation-delay:0s}.lightning-bolt.lightning-bolt-2{bottom:-10px;left:-10px;animation-delay:.3s}.lightning-ring{position:absolute;inset:-5px;border:2px solid transparent;border-radius:50%;background:linear-gradient(45deg,transparent,var(--lightning-yellow),transparent,var(--lightning-yellow));background-size:400% 400%;animation:lightningRing 3s linear infinite}.lightning-flash{position:absolute;inset:0;background:linear-gradient(45deg,transparent,var(--yellow-alpha-30),transparent);animation:lightningFlash .5s ease-in-out}.auto-skip-message{position:absolute;top:50%;left:50%;width:12rem;transform:translate(-50%,-50%);background:red;color:var(--text-white);padding:.5rem;border-radius:20px;font-size:1.5rem;font-weight:700;text-shadow:0 0 5px var(--lightning-yellow);animation:skipMessage .5s ease-in-out;text-align:center}.lightning-skip-effect{position:absolute;inset:0;pointer-events:none;z-index:10}.lives-display{display:flex;gap:.5rem;align-items:center}.life-heart{font-size:1.5rem;transition:opacity .3s ease}.life-heart.active{opacity:1}.life-heart.lost{font-size:2.3rem;opacity:.6;padding:0 .2rem}.protection-display{margin-top:3px}.protection-display .survival-protection-btn{font-size:var(--font-5xl);transition:opacity .3s ease;background-color:var(--bg-primary);border:none}.protection-display .survival-protection-btn.active{opacity:1}.protection-display .survival-protection-btn.inactive{opacity:.3}.protection-display .survival-protection-btn.earning{opacity:1;animation:protection-blink 1.2s infinite ease-in-out}.game-over-message h3{font-size:var(--font-4xl);color:var(--color-error);text-align:center}.scoreboard{display:flex;justify-content:space-around}.score-item{display:flex;flex-direction:column;align-items:center;flex:1;box-shadow:0 1px 3px var(--bg-medium)}.score-label{font-size:.8rem;font-weight:600;color:var(--gray-600);margin-bottom:.3rem;text-transform:uppercase;letter-spacing:.5px}.score-value{font-size:1.8rem;font-weight:700;line-height:1;margin-bottom:.5rem}.current-score-item{margin-top:.5rem;position:relative}.current-score-item:before,.current-score-item:after{content:"";position:absolute;top:50%;width:1px;height:60%;background:var(--border-dark);transform:translateY(-50%)}.current-score-item:before{left:-.5rem}.current-score-item:after{right:-.5rem}.season-best{color:var(--color-success)}.current-score{color:var(--color-action-hover);font-size:2.2rem}.all-time-best{color:var(--color-warning);position:relative}.all-time-best:after{content:"👑";position:absolute;top:-.3rem;right:-1rem;font-size:.9rem}.all-time-date{font-size:var(--font-xs);color:var(--color-text-secondary);margin-top:.2rem;font-weight:400}.new-best{animation:newBestGlow 2s ease-in-out;position:relative}.new-best-indicator{font-size:1rem;margin-left:.5rem;animation:newBestBounce 1s ease-in-out infinite alternate}.scoreboard .deck-info{position:absolute;bottom:-1.5rem;left:50%;transform:translate(-50%);width:100%}.deck-name{font-size:var(--font-xs);color:var(--color-text-secondary);text-align:center;padding:.2rem .5rem;background:var(--bg-light);border-radius:var(--border-radius-sm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.deck-name .deck-icon{margin-right:.35rem}.deck-info--quiz{position:static;transform:none;margin-bottom:-1rem;width:100%;text-align:center}@keyframes newBestGlow{0%,to{text-shadow:none}50%{text-shadow:0 0 10px var(--color-success),0 0 20px var(--color-success)}}@keyframes lightningBolt{0%,to{opacity:1;filter:brightness(1);transform:scale(1) rotate(-5deg)}10%{opacity:.7;filter:brightness(1.5);transform:scale(1.4) rotate(0)}20%{opacity:1;filter:brightness(1.2);transform:scale(1) rotate(5deg)}30%{opacity:.8;filter:brightness(1.4);transform:scale(1.15) rotate(-5deg)}40%{opacity:1;filter:brightness(1);transform:scale(1) rotate(0)}}@keyframes newBestBounce{0%{transform:translateY(0)}to{transform:translateY(-3px)}}.toast-container{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);z-index:1000;display:flex;flex-direction:column;gap:.75rem;pointer-events:none;align-items:center}.toast-notification{background:var(--bg-panel);border:2px solid var(--border-medium);border-radius:var(--border-radius);padding:1rem 1.25rem;box-shadow:0 8px 32px #00000026;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);max-width:350px;min-width:280px;position:relative;overflow:hidden;pointer-events:auto;cursor:pointer;animation:toastSlideIn .4s cubic-bezier(.34,1.56,.64,1)}.toast-notification:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--toast-color, var(--color-success));animation:toastProgress var(--toast-duration, 4s) linear}.toast-notification.toast-daily-best{--toast-color: var(--color-success);border-color:var(--color-success)}.toast-notification.toast-all-time-best{--toast-color: var(--color-warning);border-color:var(--color-warning)}.toast-notification.toast-all-time-best:after{content:"✨";position:absolute;top:-5px;right:-5px;font-size:1.5rem;animation:toastSparkle 2s ease-in-out infinite}.toast-notification.toast-streak-milestone{--toast-color: var(--color-action);border-color:var(--color-action)}.toast-notification:hover{transform:translateY(-2px);box-shadow:0 12px 40px #0003;transition:transform .2s ease,box-shadow .2s ease}.toast-header{display:flex;align-items:center;gap:.75rem;margin-bottom:.5rem}.toast-icon{font-size:1.5rem;line-height:1;animation:toastIconPulse 1.5s ease-in-out infinite}.toast-title{font-size:1rem;font-weight:600;color:var(--toast-color, var(--color-success));margin:0;line-height:1.2}.toast-message{font-size:.875rem;color:var(--color-text);margin:0;line-height:1.4}.toast-score{font-weight:600;color:var(--toast-color, var(--color-success))}.toast-close{position:absolute;top:.5rem;right:.5rem;background:none;border:none;font-size:1.25rem;color:var(--color-text-secondary);cursor:pointer;padding:.25rem;border-radius:50%;line-height:1;opacity:.7}.toast-close:hover{opacity:1;background:var(--bg-hover)}@keyframes toastSlideIn{0%{transform:translate(100%) scale(.9);opacity:0}to{transform:translate(0) scale(1);opacity:1}}@keyframes toastProgress{0%{width:100%}to{width:0%}}@keyframes toastIconPulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}@keyframes toastSparkle{0%,to{transform:rotate(0) scale(1);opacity:.8}25%{transform:rotate(90deg) scale(1.2);opacity:1}50%{transform:rotate(180deg) scale(1);opacity:.9}75%{transform:rotate(270deg) scale(1.1);opacity:1}}@media (max-width: 768px){.toast-container{top:50%;left:50%;transform:translate(-50%,-50%);width:calc(100% - 2rem);max-width:400px}.toast-notification{max-width:none;min-width:auto;width:100%}}@keyframes answerFeedbackCorrect{0%{border-color:var(--border-medium);background-color:var(--bg-panel)}25%{border-color:var(--color-success);background-color:var(--color-success-light);box-shadow:0 0 15px var(--color-success)}to{border-color:var(--border-medium);background-color:var(--bg-panel);box-shadow:none}}@keyframes answerFeedbackIncorrect{0%{border-color:var(--border-medium);background-color:var(--bg-panel)}25%{border-color:var(--color-error);background-color:var(--color-error-light);box-shadow:0 0 15px var(--color-error)}to{border-color:var(--border-medium);background-color:var(--bg-panel);box-shadow:none}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes toastFadeIn{0%{opacity:0;transform:translate(-50%,-50%) scale(.8)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes fadeOutCheck{0%{opacity:1;transform:scale(1.1)}to{opacity:0;transform:scale(1)}}@keyframes slideInBottom{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInTop{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@media (min-width: 481px) and (max-width: 1279px){.app-body{flex-direction:row;width:100%;max-width:1024px;margin:var(--spacing-xs) auto 0}}@media (min-width: 1280px){.app-body{flex-direction:row;width:768px;max-width:768px;margin:var(--spacing-xs) auto 0}}@media (min-width: 481px){.page{border:1px solid var(--border-dark);border-top:none;max-width:100%}}@media (min-width: 481px){.modal-popup{max-height:98vh;max-width:750px;overflow:visible;margin:auto 0}}@media (min-width: 481px){.modal-popup__header{border-radius:8px 8px 0 0}}@media (min-width: 1280px){.modal-popup .modal-popup__content{overflow-x:visible;overflow-y:auto;padding:1.5rem;border-radius:12px}}@media (min-width: 1280px){.tooltip-overlay .tooltip-content{max-width:600px}}@media (min-width: 1280px){.preference-select{width:9cap;min-width:9rem;text-align:left;padding:0 .5rem}}@media (min-width: 1280px){.header .header-section--right{align-items:center;margin-bottom:6px}}@media (min-width: 481px) and (max-width: 1279px){.header .user-section{gap:1rem}}@media (min-width: 481px) and (max-width: 1279px){.header .user-section .header-theme-toggle{display:flex;justify-content:center}}@media (min-width: 1280px){.header{height:100%;gap:0}}@media (min-width: 1280px){.page-content.home-page-content{gap:var(--spacing-xxl)}}.theme-toggle:focus{background-color:none}@media (min-width: 481px){.theme-toggle--floating{display:none}}@media (min-width: 481px){.modes-container-btn{max-height:80px;padding:var(--spacing-xs)}}@media (min-width: 481px){.story-card-container{width:100%}}@media (min-width: 481px){.stories-grid{display:grid;grid-template-columns:repeat(2,1fr);align-items:stretch}}@media (min-width: 1280px){.content-filters .clear-filters-btn{margin-left:0}}@media (min-width: 1280px){.btn--toggle{margin-top:auto}}@media (min-width: 1280px){.panel--story .stats{margin-top:auto}}@media (min-width: 1280px){.section-header__toolbar{width:102%}}@media (min-width: 1280px){.panel--vocabulary__header{min-height:0}}@media (min-width: 1280px){.panel--vocabulary--collapsed .panel--vocabulary__content{max-height:5.5rem}}@media (min-width: 481px){.panel--vocabulary__list{padding:var(--spacing-sm) var(--spacing-xl)}}@media (min-width: 481px){.panel--vocabulary__help{justify-self:center;width:94%;margin-bottom:var(--spacing-md);background-color:var(--color-action-active)}}@media (min-width: 481px){.panel--story-vocab-test__items{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md)}}@media (min-width: 481px){.panel--story-vocab-test__controls .action-group--around{width:20rem}}.modal-popup.hyperfocus-modal__popup{overflow-x:hidden}@media (min-width: 1280px){.modal-popup.hyperfocus-modal__popup .modal-popup__content{padding:0}}@media (min-width: 1280px){.modal-popup.hyperfocus-modal__popup .hyperfocus-word-display-area{max-width:100%;min-width:min(420px,90vw);max-width:550px}}@media (min-width: 1280px){.modal-popup.lesson-mode-modal__popup{max-width:768px;height:99%;align-self:center}}@media (min-width: 481px){.modal-popup h3{margin-bottom:2rem}}@media (min-width: 481px) and (max-width: 1279px){.modal-popup .focus-reading-content{padding:0 var(--spacing-md)}}.modal-popup .vocabulary-step__preview-section{flex:0}@media (min-width: 481px){.modal-popup .vocabulary-step__preview-section .vocabulary-preview{margin-top:2rem;gap:3rem}}@media (min-width: 1280px){.modal-popup .vocabulary-step__preview-section .vocabulary-preview .progress-bar{width:50%;align-self:center}}@media (min-width: 481px){.modal-popup .vocabulary-step__preview-section .vocabulary-preview__navigation{justify-content:center;gap:var(--spacing-xxl)}}@media (min-width: 481px){.vocabulary-question__options{justify-self:center;max-width:25rem}}@media (min-width: 1280px){.flashcard-controls-section{align-self:center;width:70%}}@media (min-width: 481px){.flashcard-controls-section .auto-speed-controls .speed-buttons{justify-content:center;gap:2rem}}@media (min-width: 481px){.multiple-choice-popup.practice-mode{top:50%;left:50%;min-width:30rem;max-width:100%;transform:translate(-50%,-50%)}}@media (min-width: 481px){.multiple-choice-popup.practice-mode .multiple-choice-header{justify-content:space-between}}@media (min-width: 481px){.multiple-choice-popup.practice-mode .multiple-choice-header .btn-modal-close{margin-left:var(--spacing-md)}}@media (min-width: 481px){.study-hub-options-grid{gap:8rem}}@media (min-width: 481px) and (max-width: 1279px){.flashcard-panels-container{gap:5rem}}@media (min-width: 481px){.panel--study{height:25rem}}@media (min-width: 481px){.flashcard-main-text{font-size:var(--font-6xl)}}@media (min-width: 481px){.flashcard-translation-text{font-size:var(--font-6xl)}}@media (min-width: 481px){.flashcard-example{font-size:clamp(var(--font-xl),2.2vw,var(--font-3xl));white-space:normal;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2;max-width:100%;padding:0 .25rem;word-break:normal;overflow-wrap:anywhere}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.sr-only-focusable:focus{position:static;width:auto;height:auto;padding:inherit;margin:inherit;overflow:visible;clip:auto;white-space:normal}@media (prefers-contrast: high){.vocabulary-question__option--correct{background-color:green;color:#fff;border-color:green}.vocabulary-question__option--incorrect{background-color:#c00;color:#fff;border-color:#c00}.vocabulary-question__option--correct-answer{background-color:#004d00;color:#fff;border-color:#004d00}}@media (prefers-reduced-motion: reduce){.vocabulary-progress__fill{transition:none}.typewriter-text{animation:none}.vocabulary-question__option{transition:none}}[aria-live]{position:relative}[role=toolbar]{display:flex;gap:.5rem;align-items:center}.btn[aria-pressed=true]{background-color:var(--color-action);color:#fff}.btn[aria-expanded=true]{background-color:var(--bg-surface)}.skip-link{position:absolute;top:-40px;left:6px;background:var(--primary-color, #007acc);color:#fff;padding:8px;text-decoration:none;border-radius:0 0 4px 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