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var(--radius-md);box-shadow:var(--box-shadow-weak);overflow:hidden}@media(max-width:768px){.app__main:before{content:"";position:absolute;top:0;left:0;right:0;height:20px;background:linear-gradient(var(--primary),transparent);z-index:1;pointer-events:none}.app__main:has(.pdf-reader):before{display:none}}.app__content{flex:1;overflow-y:auto;overflow-x:hidden;view-transition-name:main-content}::view-transition-group(root),::view-transition-group(main-content),::view-transition-group(mobile-dock),::view-transition-group(landing){animation:none}::view-transition-old(landing){animation:vt-fade-out .12s ease-out forwards}::view-transition-new(landing){animation:vt-fade-in .15s ease-in forwards}@keyframes vt-fade-out{to{opacity:0}}@keyframes vt-fade-in{0%{opacity:0}}::view-transition-old(root),::view-transition-new(root){animation:none}::view-transition-old(mobile-dock){display:none}::view-transition-new(mobile-dock){animation:none}@keyframes vt-scale-exit{to{opacity:0;transform:scale(.98)}}@keyframes vt-scale-enter{0%{opacity:0;transform:scale(.98)}}::view-transition-image-pair(main-content){isolation:isolate}::view-transition-old(main-content){animation:vt-scale-exit .15s ease-out forwards;mix-blend-mode:normal}::view-transition-new(main-content){animation:vt-scale-enter .2s cubic-bezier(.22,1,.36,1) 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var(--space-4)}}*,*:before,*:after{box-sizing:border-box}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}*{margin:0;-webkit-tap-highlight-color:transparent}button{outline:none}svg{flex-shrink:0}:root{--desktop-nav-height: 0px;--safe-area-bottom: env(safe-area-inset-bottom, 0px);--safe-area-top: env(safe-area-inset-top, 0px);--mobile-dock-height: 56px;--deck-indent: 20px;--bg-color: #F9F8F4;--overlay-color: #0000000C;--primary: #FBFAF9;--primary-highlight: #F5F4F2;--primary-weak-highlight: #F8F7F5;--secondary: #E3E0D8;--secondary-highlight: #D6D2C9;--secondary-strong-highlight: #C8C3B9;--secondary-weak: #EBE8E2;--secondary-extra-weak: #F0EDE8;--text-color: #2C2C2C;--text-color-medium: #383838;--text-color-weak: #5C5C5C;--text-color-extra-weak: #808080;--text-color-extra-extra-weak: #A0A0A0;--text-color-highlight: #2D2929;--text-color-accent: #FAF8F5;--text-color-accent-hover: #F3F1EC;--surface-accent: #2D2929;--surface-accent-highlight: 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.15s;--duration-normal: .2s;--duration-slow: .3s;--duration-slower: .5s;--font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-serif: "Vollkorn", ui-serif, serif;--font-review: var(--font-sans);--font-size-base: 15px;--status-new: var(--secondary-strong-highlight);--status-learning: var(--text-color-extra-weak);--status-review: var(--text-color-highlight);--status-relearning: var(--text-color-extra-extra-weak);--button-primary-bg: #2D2929;--button-primary-bg-hover: #3D3838;--button-primary-text: #FAF8F5;--color-success: #22c55e;--color-error: #ef4444;--color-warning: #f59e0b;--color-danger: #dc3545;--color-danger-bg: rgba(220, 53, 69, .1);color-scheme:light}:root.dark{--bg-color: #1A1918;--overlay-color: #00000060;--primary: #1E1D1B;--primary-highlight: #262523;--primary-weak-highlight: #201F1D;--secondary: #333130;--secondary-highlight: #3E3C3A;--secondary-strong-highlight: #4A4846;--secondary-weak: #2B2928;--secondary-extra-weak: #242220;--text-color: #E8E8E8;--text-color-medium: #D8D8D8;--text-color-weak: #B0B0B0;--text-color-extra-weak: #888888;--text-color-extra-extra-weak: #606060;--text-color-highlight: #F5F5F5;--text-color-accent: #F5F5F5;--text-color-accent-hover: #E8E8E8;--surface-accent: #1A1918;--surface-accent-highlight: #2B2928;--box-shadow-weak: 0 1px 4px 0 rgba(0, 0, 0, .25), 0 1px 2px -1px rgba(0, 0, 0, .25);--box-shadow: 0 4px 12px -2px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .25);--box-shadow-strong: 0 10px 25px -5px rgba(0, 0, 0, .35), 0 4px 8px -4px rgba(0, 0, 0, .3);--border-color: #302E2C;--border-color-weak: #292726;--button-primary-bg: #F0F0F0;--button-primary-bg-hover: #F5F5F5;--button-primary-text: #1A1918;--color-success: #22c55e;--color-error: #ef4444;--color-warning: #f59e0b;--color-danger: #dc3545;--color-danger-bg: rgba(220, 53, 69, .15);color-scheme:dark}.reduce-motion::view-transition-old(*),.reduce-motion::view-transition-new(*){animation:none!important}.reduce-motion .review-mode__card{transition:none!important}.reduce-motion .review-mode__card--transitioning{animation:none!important}.reduce-motion .review-mode__show-btn-wrapper,.reduce-motion .review-mode__rating-buttons .review-mode__rating-column,.reduce-motion .review-mode__dock-buttons--revealed .review-mode__show-btn-wrapper,.reduce-motion .review-mode__dock-buttons--revealed .review-mode__rating-buttons .review-mode__rating-column{transition:none!important}.reduce-motion .modal,.reduce-motion .drawer{animation-duration:0s!important;transition-duration:0s!important}html{font-size:var(--font-size-base, 15px)}@media(max-width:768px){html{font-size:calc(var(--font-size-base, 15px) + 1px)}:root{--text-2xl: 1.2rem;--text-3xl: 1.35rem;--deck-indent: 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var(--desktop-nav-height));margin-top:var(--desktop-nav-height)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--secondary-highlight);border-radius:var(--radius-pill)}::-webkit-scrollbar-thumb:hover{background:var(--secondary-strong-highlight)}*{scrollbar-width:thin;scrollbar-color:var(--secondary-highlight) transparent}.status-dot{width:var(--space-2);height:var(--space-2);border-radius:50%;flex-shrink:0;background-color:var(--text-color-extra-weak)}.status-dot--new{background-color:var(--status-new)}.status-dot--learning{background-color:var(--status-learning)}.status-dot--review{background-color:var(--status-review)}.status-dot--relearning{background-color:var(--status-relearning)}.label-uppercase{font-size:var(--text-sm);font-weight:500;text-transform:uppercase;letter-spacing:.03rem;color:var(--text-color-extra-weak)}.due-limited{text-decoration:underline dotted;text-underline-offset:2px;cursor:help}.kbd{display:inline-flex;align-items:center;justify-content:center;min-width:24px;height:22px;padding:0 var(--space-1-5);background:var(--secondary);border:1px solid var(--border-color-weak);border-radius:var(--radius-sm);font-size:var(--text-base);font-family:var(--font-sans);color:var(--text-color-weak)}.kbd--small{min-width:20px;height:20px;padding:0 var(--inset-sm);font-size:var(--text-sm)}.kbd[role=button]{cursor:pointer;transition:background-color .1s}.kbd[role=button]:hover{background-color:var(--secondary-highlight)}.kbd[role=button]:active{background-color:var(--secondary-strong-highlight)}@media(max-width:768px){.kbd{display:none}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.skeleton-shimmer{background:linear-gradient(90deg,var(--secondary) 25%,var(--secondary-highlight) 50%,var(--secondary) 75%);background-size:200% 100%;border-radius:var(--radius-sm);animation:shimmer 2.5s infinite,fadeIn .5s forwards}@keyframes progress-slide{0%{left:-30%;width:30%}50%{width:40%}to{left:100%;width:30%}}.progress-slide{position:absolute;bottom:0;left:0;height:2px;border-radius:1px;background:var(--surface-accent);animation:progress-slide 2s ease-in-out infinite}.drop-indicator{position:absolute;height:2px;background:var(--text-color-extra-weak);border-radius:1px;opacity:0;pointer-events:none;transition:opacity var(--duration-normal) ease}.drop-indicator--visible{opacity:1}.drop-indicator:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:6px;height:6px;background:var(--text-color-extra-weak);border-radius:50%}.root-drop-zone{display:flex;align-items:center;justify-content:center;min-height:36px;margin-top:var(--space-2);padding:var(--space-2);border:1px dashed var(--border-color);border-radius:var(--radius-md);font-size:var(--text-sm);color:var(--text-color-extra-weak);transition:border-color var(--duration-normal) ease,background var(--duration-normal) ease,color var(--duration-normal) ease}.root-drop-zone--active{border-color:var(--text-color-extra-weak);background:var(--secondary-extra-weak);color:var(--text-color-weak)}.drag-overlay{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--primary);border:1px solid var(--border-color-weak);border-radius:var(--radius-md);box-shadow:var(--box-shadow-strong);font-size:var(--text-base);font-weight:500;color:var(--text-color);pointer-events:none}