:root{--bg-primary:#303230;--bg-secondary:#363836;--bg-elevated:#3b3d3b;--bg-hover:#404240;--border:#464946;--border-strong:#5b5f5b;--border-dim:#3d403d;--text-primary:#d8dad7;--text-secondary:#afb2ae;--text-dim:#9a9d98;--text-muted:#898d89;--text-bright:#f1f2ef;--accent:#d9b64c;--accent-hover:#e5c45d;--accent-dim:#d9b64c21;--success:#7ecf82;--success-dim:#7ecf8224;--error:#f57da6;--error-dim:#f57da624;--warning:#ffb74d;--warning-dim:#ffb74d24;--danger:var(--error);--font-ui:"Open Sans", Arial, sans-serif;--font-mono:"Ubuntu Mono", "SFMono-Regular", Consolas, monospace;--fs-xs:.625rem;--fs-sm:.75rem;--fs-base:.875rem;--fs-lg:1.125rem;--fs-xl:1.5rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-7:3rem;--space-8:4rem;--h1:clamp(2rem, 6vw, 4.25rem);--h2:clamp(1.5rem, 4vw, 2.4rem);--h3:clamp(1.25rem, 4vw, 1.7rem);--h4:var(--fs-lg);--speed:.15s;--radius:2px;--on-accent:#111;--z-header:80;--z-mobile-menu:90;--z-dropdown:100;--z-bulk-actions:110;--z-offline:200;--z-modal:300;--z-toast:10000;--shadow-menu:var(--shadow-menu);--shadow-modal:var(--shadow-modal);--shadow-toast:var(--shadow-toast);--shadow-bulk:var(--shadow-bulk);--shadow-mobile:var(--shadow-mobile);--shadow-chip:var(--shadow-chip);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{background:var(--bg-primary);scrollbar-color:var(--border-strong) transparent;font-size:17px}body{background:var(--bg-primary);min-width:320px;min-height:100dvh;color:var(--text-primary);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}#root{flex-direction:column;min-height:100dvh;display:flex}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border)}input,textarea,select{font-family:var(--font-ui);font-size:var(--fs-base);border:none;border-bottom:1px solid var(--border);color:var(--text-primary);padding:var(--space-2) 0;width:100%;transition:border-color var(--speed);background:0 0;outline:none}input:focus,textarea:focus,select:focus{border-bottom-color:var(--accent)}input::placeholder,textarea::placeholder{color:var(--text-dim)}textarea{resize:vertical;border:1px solid var(--border);padding:var(--space-3);background:var(--bg-secondary);border-radius:2px}textarea:focus{border-color:var(--text-dim);outline:none}.hard-mode-input{width:100%;font-family:var(--font-mono);font-size:var(--fs-lg);padding:var(--space-4);text-align:center;border-bottom:2px solid var(--border);transition:border-color var(--speed);border-radius:0}.hard-mode-input:focus{border-color:var(--accent)}select{background:var(--bg-secondary);border:1px solid var(--border);padding:var(--space-2) var(--space-2);cursor:pointer;appearance:auto;border-radius:2px}select:focus{border-color:var(--accent)}label{font-size:var(--fs-sm);text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);margin-bottom:.3rem;font-weight:600;display:block}button,.btn{font-family:var(--font-ui);font-size:var(--fs-base);cursor:pointer;padding:var(--space-2) var(--space-4);font-weight:600;font-size:var(--fs-base);transition:background-color var(--speed), border-color var(--speed), color var(--speed), opacity var(--speed), transform var(--speed);-webkit-user-select:none;user-select:none;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;background:0 0;border:none;border-radius:2px;justify-content:center;align-items:center;gap:.4rem;font-weight:500;display:inline-flex}button:hover{color:var(--text-bright)}button:active{transform:scale(.97)}button:disabled{cursor:not-allowed;opacity:.52;transform:none}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[role=button]:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.btn-primary{background:var(--accent);color:var(--on-accent)}.btn-primary:hover{background:var(--accent-hover);color:var(--on-accent)!important}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--text-secondary);color:var(--text-bright)}.btn-danger{background:var(--bg-primary);border:1px solid var(--error-dim);color:var(--error)}.btn-danger:hover{background:var(--error-dim)}.btn-toggle{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-secondary);padding:.4rem .8rem}.btn-toggle.active{background:var(--accent-dim);color:var(--on-accent);border-color:var(--accent)}.btn-almost{background:var(--bg-primary);border:1px solid var(--warning-dim);color:var(--warning)}.btn-almost:hover{background:var(--warning-dim)}.btn-success{background:var(--bg-primary);border:1px solid var(--success-dim);color:var(--success)}.btn-success:hover{background:var(--success-dim)}.btn-ghost{color:var(--text-dim);background:0 0}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-hover)}.btn-primary,.btn-secondary,.btn-ghost{text-decoration:none}.shared-deck{width:min(960px,100%);min-height:calc(100dvh - 150px);padding:clamp(3rem, 8vw, 7rem) var(--space-5);grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);align-items:center;gap:clamp(2.5rem,8vw,7rem);margin:0 auto;display:grid}.shared-deck-copy{min-width:0}.shared-deck-kicker{margin-bottom:var(--space-4);color:var(--accent);font-family:var(--font-mono);font-size:var(--fs-sm);text-transform:uppercase;letter-spacing:.08em;display:block}.shared-deck h1{max-width:680px;color:var(--text-bright);font-size:var(--h1);letter-spacing:-.05em;overflow-wrap:anywhere;font-weight:400;line-height:1.04}.shared-deck-description{max-width:560px;color:var(--text-secondary);font-size:var(--fs-base);margin-top:1.25rem;line-height:1.7}.shared-deck-meta{gap:var(--space-3) var(--space-5);margin-top:var(--space-6);color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-base);flex-wrap:wrap;display:flex}.shared-deck-meta strong{color:var(--text-primary);font-weight:400}.shared-deck-actions{flex-wrap:wrap;gap:.6rem;margin-top:2.25rem;display:flex}.shared-deck-actions button{text-transform:none;letter-spacing:0;min-height:44px}.shared-deck-primary{min-width:140px}.shared-deck-note{max-width:540px;margin-top:var(--space-4);color:var(--text-dim);font-size:var(--fs-sm)}.shared-deck-preview{border:1px solid var(--border);background:var(--bg-secondary);border-radius:2px;min-width:0;padding:clamp(1.5rem,4vw,2.5rem)}.shared-deck-preview-label{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em}.shared-deck-front,.shared-deck-back{margin-top:var(--space-5);color:var(--text-primary);overflow-wrap:anywhere;font-size:clamp(1rem,2.5vw,1.35rem);line-height:1.55}.shared-deck-back{color:var(--text-secondary)}.shared-deck-divider{height:1px;margin-top:var(--space-5);background:var(--border)}.shared-deck-state{justify-content:center;align-items:flex-start;gap:var(--space-4);flex-direction:column;max-width:720px;min-height:auto;display:flex}.shared-deck-state h1{font-size:clamp(2rem,6vw,3.5rem)}.app-header{z-index:var(--z-header);padding:0 var(--space-5);padding-top:env(safe-area-inset-top,0);border-bottom:1px solid var(--border);background:var(--bg-primary);flex-shrink:0;justify-content:space-between;align-items:center;min-height:48px;display:flex;position:sticky;top:0}.app-logo{cursor:pointer;padding:var(--space-2) .55rem;text-transform:none;letter-spacing:0;align-items:center;gap:.6rem;margin-left:-.55rem;text-decoration:none;display:flex}.app-logo-mark{object-fit:contain;border-radius:2px;width:18px;height:18px}.app-logo-text{font-weight:600;font-size:var(--fs-base);color:var(--text-primary);letter-spacing:-.02em}.static-nav{align-items:center;gap:var(--space-4);display:flex}.static-nav a,.landing-text-link,.landing-text-button{color:var(--text-secondary);font-size:var(--fs-base);text-decoration:none}.static-nav a:hover,.landing-text-link:hover,.landing-text-button:hover{color:var(--accent)}.landing-text-button{text-transform:none;letter-spacing:0;min-height:auto;padding:0}.header-nav{gap:var(--space-2);align-items:center;display:flex}.language-selector{align-items:center;gap:var(--space-1);color:var(--text-secondary);margin-bottom:0;display:inline-flex}.language-selector:focus-within,.language-selector:hover{border-color:var(--border-strong);color:var(--text-bright)}.language-selector select{width:auto;min-width:76px;min-height:24px;padding:0 var(--space-2) 0 0;color:var(--text-secondary);font-size:var(--fs-base);cursor:pointer;text-transform:uppercase;letter-spacing:.05em;background-color:#0000;border:0}.language-selector select:hover{color:var(--accent)}.language-selector svg{margin-top:-1px}.language-selector select:focus{outline:0}.language-selector select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app-main{flex-direction:column;flex:1;min-width:0;display:flex}.view-loading{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-base);flex:1;place-items:center;display:grid}.sync-icon{font-size:var(--fs-base);letter-spacing:.1em;display:inline-flex}.sync-icon.spinning{animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.user-btn{padding:var(--space-1);justify-content:center;align-items:center;min-width:44px;min-height:44px;display:flex}.user-avatar{border-radius:50%;width:24px;height:24px;display:block}.user-avatar-fallback{background:var(--accent-dim);width:24px;height:24px;color:var(--accent);font-size:var(--fs-sm);border-radius:50%;justify-content:center;align-items:center;font-weight:700;display:flex}.sync-status{font-size:var(--fs-xs);color:var(--text-dim);font-family:var(--font-mono);text-overflow:ellipsis;white-space:nowrap;max-width:100px;padding-right:var(--space-2);overflow:hidden}.user-menu-wrap{position:relative}.user-menu-backdrop{z-index:var(--z-dropdown);position:fixed;inset:0}.user-menu{background:var(--bg-elevated);border:1px solid var(--border);min-width:200px;z-index:var(--z-dropdown);border-radius:2px;max-height:60vh;position:absolute;top:calc(100% + 8px);right:0;overflow-y:auto;box-shadow:0 10px 28px #00000040}.user-menu-info{padding:var(--space-3);flex-direction:column;gap:.15rem;display:flex}.user-menu-name{font-size:var(--fs-base);color:var(--text-bright);font-weight:600}.user-menu-email{font-size:var(--fs-xs);color:var(--text-dim);font-family:var(--font-mono)}.user-menu-divider{background:var(--border);height:1px}.user-menu-item{width:100%;padding:.6rem var(--space-3);font-size:var(--fs-base);color:var(--text-secondary);text-transform:none;letter-spacing:0;cursor:pointer;transition:background var(--speed);background:0 0;border:none;border-radius:0;display:flex}.user-menu-item:hover{background:var(--bg-hover);color:var(--text-bright)}.user-menu-item.danger:hover{background:var(--error-dim);color:var(--error)}.dash{width:100%;max-width:880px;padding:clamp(1.75rem, 5vw, 3.25rem) var(--space-5) 4rem;margin:0 auto}.dash-top{justify-content:space-between;align-items:center;gap:var(--space-5);margin-bottom:var(--space-5);display:flex}.dash-title{align-items:baseline;gap:var(--space-3);min-width:0;display:flex}.dash-heading{color:var(--text-bright);font-size:var(--fs-lg);letter-spacing:0;margin-bottom:.15rem;font-weight:600;line-height:1.3}.dash-intro{color:var(--text-dim);font-size:var(--fs-base)}.dash-actions{gap:var(--space-2);flex-wrap:wrap;display:flex}.dash-action{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-base);text-transform:uppercase;letter-spacing:.05em;min-height:auto;transition:color var(--speed);background:0 0;border:none;padding:0}.dash-action:hover{color:var(--text-bright)}.dash-overview{gap:var(--space-6);align-items:start;margin-bottom:2.5rem;display:flex}@media (width<=1024px){.dash-overview{gap:var(--space-5);flex-direction:column}.dash-metrics{margin-top:0}}.dash-metrics{gap:var(--space-4);flex:1;grid-template-columns:repeat(2,1fr);grid-auto-rows:1fr;align-content:start;margin-top:0;display:grid}.metric-box{background:var(--bg-elevated);padding:1rem var(--space-3);border:1px solid var(--border);border-radius:2px;flex-direction:column;justify-content:center;align-items:center;min-width:0;display:flex}.metric-value{font-family:var(--font-mono);font-size:var(--fs-xl);color:var(--text-bright);margin-bottom:var(--space-1);white-space:nowrap;font-weight:700;line-height:1.1}.metric-value--compact{font-size:var(--fs-lg)}.metric-label{font-size:var(--fs-xs);color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em;text-align:center;line-height:1.3}.activity-heatmap{font-family:var(--font-mono);font-size:var(--fs-base);color:var(--text-secondary)}.heatmap-header{justify-content:space-between;align-items:center;gap:var(--space-4);margin-bottom:var(--space-3);flex-wrap:wrap;display:flex}.heatmap-title,.heatmap-range{display:block}.heatmap-title{color:var(--text-bright);font-weight:600}.heatmap-goal-wrap{white-space:nowrap}.goal-display{color:var(--text-primary);border:1px dashed var(--border);padding:var(--space-1) var(--space-2);cursor:pointer;font-family:inherit;font-size:inherit;background:0 0;border-radius:2px}.goal-display:hover{border-color:var(--text-dim)}.goal-input{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border-strong);padding:var(--space-1) var(--space-2);font-family:inherit;font-size:inherit;border-radius:2px;width:60px}.heatmap-streak{color:var(--text-bright)}.heatmap-container{gap:var(--space-1);padding-bottom:var(--space-2);flex-direction:column;display:flex;overflow-x:auto}.heatmap-streak-icon{font-size:var(--fs-lg)}.heatmap-months{font-size:var(--fs-sm);color:var(--text-dim);gap:3px;min-width:max-content;margin-left:2px;display:grid}.heatmap-grid{gap:3px;min-width:max-content;display:grid}.heatmap-col{grid-template-rows:repeat(7,12px);gap:3px;display:grid}.heatmap-cell{background-color:var(--bg-elevated);border-radius:2px;width:12px;height:12px}.heatmap-cell.level-0{background-color:var(--bg-elevated)}.heatmap-cell.level-1{background-color:#5d5332}.heatmap-cell.level-2{background-color:#7f6e3a}.heatmap-cell.level-3{background-color:#ab9243}.heatmap-cell.level-4{background-color:var(--accent)}.heatmap-cell.today{outline:2px solid var(--border-strong);outline-offset:1px}.heatmap-legend{font-size:var(--fs-sm);color:var(--text-dim);margin-top:var(--space-2);justify-content:flex-end;align-self:flex-end;align-items:center;gap:.35rem;width:max-content;display:flex}.deck-section-head{margin-bottom:var(--space-2);color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-sm);justify-content:space-between;align-items:center;display:flex}.deck-section-title{font-size:inherit;text-transform:none;letter-spacing:0;color:var(--text-secondary);font-weight:600}.deck-list{border-top:1px solid var(--border);flex-direction:column;display:flex;overflow:visible}.deck-row{justify-content:space-between;align-items:center;gap:var(--space-5);border-bottom:1px solid var(--border);min-height:76px;transition:background-color var(--speed);padding:.9rem 0;display:flex;position:relative}.deck-row.menu-open{z-index:20}.deck-row:hover{background:var(--bg-hover)}.deck-info{gap:var(--space-1);flex-direction:column;flex:1;min-width:0;display:flex}.deck-name-line{align-items:center;gap:var(--space-3);min-width:0;display:flex}.deck-name{font-size:var(--fs-base);color:var(--text-bright);white-space:nowrap;text-overflow:ellipsis;word-break:break-word;font-weight:600;overflow:hidden}.deck-due{color:var(--accent);font-family:var(--font-mono);font-size:var(--fs-sm);flex-shrink:0}.deck-desc{max-width:580px;font-size:var(--fs-sm);color:var(--text-dim);white-space:normal;-webkit-line-clamp:3;word-break:break-word;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.deck-meta{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-sm)}.deck-right{flex-shrink:0;align-items:center;display:flex}.deck-btns{align-items:center;gap:var(--space-1);display:flex}.deck-study{border:1px solid var(--border-strong);min-width:90px;min-height:34px;color:var(--text-primary);background:var(--bg-secondary);font-family:var(--font-mono);font-size:var(--fs-base);text-transform:none;letter-spacing:0;border-radius:2px;font-weight:400}.deck-study:hover{border-color:var(--accent);color:var(--text-bright);background:var(--bg-hover)}.deck-quiz{border:1px solid var(--border-dim);min-width:52px;min-height:34px;color:var(--accent);font-family:var(--font-mono);font-size:var(--fs-sm);text-transform:none;letter-spacing:0;background:0 0;border-radius:2px;font-weight:400}.deck-quiz:hover{border-color:var(--accent);color:var(--text-bright);background:var(--accent-dim)}.deck-menu-wrap{position:relative}.deck-menu-button{width:34px;height:34px;color:var(--text-dim);font-size:var(--fs-lg);letter-spacing:0;border-radius:2px;padding:0}.deck-menu-button:hover{color:var(--text-primary);background:var(--bg-hover)}.deck-menu-backdrop{z-index:10;position:fixed;inset:0}.deck-menu{z-index:11;border:1px solid var(--border);background:var(--bg-secondary);width:180px;max-width:calc(100vw - 2rem);max-height:60vh;box-shadow:var(--shadow-menu);border-radius:2px;flex-direction:column;padding:.35rem;display:flex;position:absolute;top:calc(100% + .4rem);right:0;overflow-y:auto}.deck-menu button{min-height:38px;padding:var(--space-2) .6rem;color:var(--text-secondary);text-transform:none;letter-spacing:0;border-radius:2px;justify-content:flex-start}.deck-menu button:hover{color:var(--text-bright);background:var(--bg-hover)}.empty-state{text-align:left;padding:var(--space-7) 0;color:var(--text-dim)}.empty-state h3{font-size:var(--fs-base);color:var(--text-primary);margin-bottom:.4rem;font-weight:600}.empty-state p{font-size:var(--fs-base);color:var(--text-dim)}.empty-actions{gap:var(--space-2);margin-top:1.25rem;display:flex}.ingest{width:100%;max-width:880px;padding:var(--space-6) var(--space-5);margin:0 auto}.ingest-head{margin-bottom:var(--space-6);flex-wrap:wrap;justify-content:space-between;align-items:center;display:flex}.ingest-head h1{font-size:var(--fs-base);text-transform:uppercase;letter-spacing:.1em;color:var(--text-secondary);font-weight:600}.ingest-grid{grid-template-columns:1fr 1.2fr;gap:2.5rem;display:grid}.ingest-section{gap:var(--space-4);flex-direction:column;display:flex}.ingest-section h3{font-size:var(--fs-sm);text-transform:uppercase;letter-spacing:.08em;color:var(--text-secondary);border-bottom:1px solid var(--border);padding-bottom:.4rem;font-weight:600}.ingest-kicker{margin-bottom:var(--space-1);color:var(--accent);font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.08em;text-transform:uppercase;font-weight:700;display:block}.ingest-paste-section{border:1px solid var(--border-strong);background:var(--bg-secondary);align-self:start;padding:1.25rem}.ingest-paste-section h3{color:var(--text-primary);font-size:var(--fs-base);border:0;margin:0;padding:0}.ingest-paste-input{resize:vertical;background:var(--bg-primary)}.ingest-paste-input:focus{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.ingest-section p{font-size:var(--fs-base);color:var(--text-dim);line-height:1.5}.ingest-save-details{margin-top:var(--space-2);align-self:flex-start}.ingest-copy{width:100%;min-height:40px;margin-bottom:var(--space-4);text-transform:none;letter-spacing:0}.ingest-copy.copied{background:var(--success)}.ingest-ai-links{gap:var(--space-2);display:flex}.ingest-ai-links a{min-height:38px;color:var(--text-primary);text-align:center;text-transform:none;letter-spacing:0;flex:1;justify-content:center;align-items:center;text-decoration:none;display:inline-flex}.ingest-file-label{cursor:pointer;text-transform:none;letter-spacing:0;align-items:center;min-height:34px;margin:0;display:inline-flex}.prompt-display{background:var(--bg-secondary);border:1px solid var(--border);padding:var(--space-3);font-family:var(--font-mono);font-size:var(--fs-sm);color:var(--text-secondary);white-space:pre-wrap;border-radius:2px;max-height:130px;line-height:1.6;overflow-y:auto}.ingest-feedback{font-size:var(--fs-base);padding:var(--space-2) 0;align-items:center;gap:.4rem;display:flex}.ingest-feedback.ok{color:var(--success)}.ingest-feedback.err{color:var(--error);background:var(--error-dim);padding:var(--space-2) var(--space-3);border-radius:2px}.dropzone{border:1px dashed var(--border-strong);min-height:120px;color:var(--text-secondary);text-align:center;cursor:pointer;transition:background-color var(--speed), border-color var(--speed), color var(--speed);border-radius:2px;place-items:center;padding:1.25rem;display:grid}.dropzone:hover,.dropzone.active{border-color:var(--accent);background:var(--accent-dim);color:var(--text-primary)}.preview-wrap{border-top:1px solid var(--border);padding-top:var(--space-5);margin-top:2.5rem}.preview-wrap h3{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);margin-bottom:var(--space-4);font-weight:600}.preview-table{border-collapse:collapse;width:100%;font-size:var(--fs-base)}.preview-table th{padding:var(--space-2) var(--space-2) var(--space-2) 0;text-align:left;color:var(--text-dim);font-weight:600;font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--border)}.preview-table td{padding:var(--space-2) var(--space-2) var(--space-2) 0;border-bottom:1px solid var(--bg-hover);vertical-align:top}.preview-table td:first-child{font-family:var(--font-mono);color:var(--text-secondary)}.preview-table td:nth-child(2){font-family:var(--font-mono);color:var(--text-primary);font-weight:500}.preview-table td:nth-child(3){color:var(--text-dim);font-style:italic;font-size:var(--fs-base)}.arena-counter{font-family:var(--font-mono);font-size:var(--fs-base);color:var(--text-secondary)}.arena-score{font-family:var(--font-mono);font-size:var(--fs-base);font-weight:500}.arena-score.ok{color:var(--success)}.arena-score.ko{color:var(--error)}.progress-track{background:var(--border);width:100%;height:2px;margin-bottom:0}.progress-fill{background:var(--accent);height:100%;transition:width .2s}.quiz-card{width:100%;max-width:540px;padding:var(--space-5);gap:var(--space-4);flex-direction:column;display:flex}.quiz-question{font-size:var(--fs-lg);text-align:center;color:var(--text-bright);word-break:break-word;margin:0;font-weight:500;line-height:1.5}.quiz-context{font-size:var(--fs-base);color:var(--text-dim);text-align:center;margin:0;font-style:italic}.quiz-options{gap:var(--space-2);margin-top:var(--space-2);flex-direction:column;display:flex}.quiz-option{align-items:center;gap:var(--space-3);width:100%;padding:var(--space-3) var(--space-4);border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-primary);font-size:var(--fs-base);text-align:left;cursor:pointer;border-radius:2px;font-family:inherit;transition:background .1s,border-color .1s;display:flex}.quiz-option:hover:not(:disabled){border-color:var(--accent);background:var(--bg-hover)}.quiz-option.correct{border-color:var(--success);background:var(--success-dim)}.quiz-option.incorrect{border-color:var(--error);background:var(--error-dim)}.quiz-option.dim{opacity:.4}.quiz-option:disabled{cursor:default}.quiz-option-letter{border:1px solid var(--border);width:24px;height:24px;font-size:var(--fs-base);font-weight:600;font-family:var(--font-mono);border-radius:2px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.quiz-option-text{word-break:break-word;flex:1}.quiz-option-icon{font-size:var(--fs-base);flex-shrink:0;font-weight:700}.card-text.answer{color:var(--accent)}.card-context{font-size:var(--fs-base);color:var(--text-dim);text-align:center;border-top:1px solid var(--border);max-width:80%;padding-top:var(--space-4);word-break:break-word;margin-top:1.25rem;font-style:italic;line-height:1.5}.kbd-hud{align-items:center;gap:var(--space-2);padding:var(--space-5) 0 var(--space-2);border-top:1px solid var(--border);flex-direction:column;margin-top:auto;display:flex}.kbd-hint{font-family:var(--font-mono);font-size:var(--fs-sm);color:var(--text-dim);opacity:.6}.kbd-hud-label{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.12em;color:var(--text-dim);font-weight:600}.kbd-row{gap:.4rem;display:flex}.kbd-key{font-family:var(--font-mono);font-size:var(--fs-sm);color:var(--text-dim);background:var(--bg-secondary);border:1px solid var(--border);padding:var(--space-1) var(--space-2);min-width:2rem;height:1.6rem;transition:all var(--speed);border-bottom-width:2px;border-radius:2px;justify-content:center;align-items:center;gap:.3rem;font-weight:500;display:inline-flex}.kbd-key.pressed{background:var(--accent);color:var(--on-accent);border-color:var(--accent);border-bottom-width:1px;transform:translateY(1px)}.kbd-action{font-size:var(--fs-xs);color:var(--text-dim);font-family:var(--font-ui);text-transform:uppercase;letter-spacing:.04em}.session-done{text-align:center;align-items:center;gap:var(--space-4);flex-direction:column;display:flex}.session-done h2{font-size:var(--h4);color:var(--text-primary);font-weight:600}.session-done p{font-size:var(--fs-base);color:var(--text-secondary);max-width:400px}.session-stats{gap:var(--space-6);margin:var(--space-2) 0 var(--space-4);display:flex}.session-stat{flex-direction:column;align-items:center;display:flex}.session-stat .num{font-family:var(--font-mono);font-size:var(--fs-xl);font-weight:500;line-height:1.2}.session-stat .num.ok{color:var(--success)}.session-stat .num.ko{color:var(--error)}.session-stat .lbl{font-size:var(--fs-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);font-weight:600}.modal-overlay{z-index:var(--z-modal);padding:var(--space-4);background:#00000094;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-elevated);border:1px solid var(--border);width:100%;max-width:400px;padding:var(--space-5);box-shadow:var(--shadow-modal);border-radius:2px;flex-direction:column;gap:1.25rem;display:flex}.modal-content h3{font-size:var(--fs-base);white-space:normal;overflow-wrap:anywhere;font-weight:500}.toast-container{z-index:var(--z-toast);gap:var(--space-2);pointer-events:none;flex-direction:column;display:flex;position:fixed;bottom:1.5rem;right:1.5rem}.toast{align-items:center;gap:var(--space-2);background:var(--bg-elevated);border:1px solid var(--border);color:var(--text-bright);font-size:var(--fs-base);box-shadow:var(--shadow-toast);pointer-events:auto;border-radius:2px;max-width:360px;padding:.65rem .9rem;animation:.2s toast-in;display:flex}.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--error)}.toast-info{border-left:3px solid var(--accent)}.toast-warning{border-left:3px solid var(--warning)}.toast-icon{width:1.2rem;height:1.2rem;font-size:var(--fs-sm);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex}.toast-success .toast-icon{background:var(--success-dim);color:var(--success)}.toast-error .toast-icon{background:var(--error-dim);color:var(--error)}.toast-info .toast-icon{background:var(--accent-dim);color:var(--accent)}.toast-warning .toast-icon{background:var(--warning-dim);color:var(--warning)}.toast-message{line-height:1.4}@keyframes toast-in{0%{opacity:0;transform:translateY(.5rem)}to{opacity:1;transform:translateY(0)}}@media (width<=520px){.toast-container{bottom:.75rem;left:.75rem;right:.75rem}.toast{max-width:100%}}.flex-between{justify-content:space-between;align-items:center;display:flex}.card-compare{align-items:center;gap:var(--space-5);flex-direction:column;width:100%;display:flex}.card-compare-side{flex-direction:column;align-items:center;width:100%;display:flex}.card-compare-divider{background:var(--border);width:50px;height:2px}.card-text.dim{color:var(--text-dim);font-size:var(--fs-lg)}.breakdown-section{padding-bottom:var(--space-5);border-bottom:1px solid var(--border);margin-bottom:2.5rem}.breakdown-bar{background:var(--bg-hover);width:100%;height:4px;margin-bottom:var(--space-3);border-radius:2px;display:flex;overflow:hidden}.breakdown-segment{height:100%;transition:width .3s}.breakdown-segment.new{background:var(--accent)}.breakdown-segment.learning{background:#ffb74d}.breakdown-segment.mastered{background:var(--success)}.breakdown-legend{gap:var(--space-5);margin-top:var(--space-4);font-size:var(--fs-xs);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;flex-wrap:wrap;font-weight:600;display:flex}.breakdown-legend-item{align-items:center;gap:.35rem;display:flex}.dot{border-radius:50%;width:8px;height:8px}.dot.new{background:var(--accent)}.dot.learning{background:#ffb74d}.dot.mastered{background:var(--success)}.deck-mastery-pct{font-family:var(--font-mono);font-size:var(--fs-base);color:var(--text-dim);margin-left:var(--space-4);font-weight:500}.deck-mastery-bar{background:var(--bg-hover);width:100%;height:3px;margin-top:var(--space-2);border-radius:2px;display:flex;overflow:hidden}.app-footer{border-top:1px solid var(--border);padding:var(--space-4) var(--space-5);justify-content:center;align-items:center;gap:var(--space-4);text-align:center;font-size:var(--fs-sm);color:var(--text-dim);flex-wrap:wrap;display:flex}.app-footer nav{gap:var(--space-3);display:flex}.app-footer a{color:var(--text-secondary);text-decoration:none}.app-footer a:hover{color:var(--accent)}.app-footer-brand{align-items:center;gap:.4rem;display:inline-flex}.app-footer-brand .app-logo-mark{width:14px;height:14px}.footer-social{gap:var(--space-4);margin-left:var(--space-4);align-items:center;display:flex}.footer-social a{color:var(--text-dim);justify-content:center;align-items:center;transition:color .2s;display:flex}.footer-social a:hover{color:var(--text-secondary)}.footer-social svg{fill:currentColor;width:1.2rem;height:1.2rem}.community{width:min(960px,100%);padding:clamp(1.75rem, 5vw, 3.25rem) var(--space-5) 4rem;margin:0 auto}.community-head{justify-content:space-between;align-items:end;gap:var(--space-6);margin-bottom:var(--space-5);display:flex}.community-kicker,.setup-kicker{color:var(--accent);font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.08em;text-transform:uppercase;margin-bottom:.35rem;font-weight:600;display:block}.community h1{color:var(--text-bright);font-size:var(--h4);font-weight:600}.community-search{align-items:end;gap:.65rem;width:min(360px,100%);display:flex}.community-search button{text-transform:none;letter-spacing:0;min-height:36px}.community-categories{padding:var(--space-2) 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);scrollbar-width:thin;gap:.15rem;margin-bottom:1.75rem;display:flex;overflow-x:auto}.community-category{min-height:34px;color:var(--text-dim);font-size:var(--fs-sm);text-transform:none;letter-spacing:0;border:1px solid #0000;border-radius:2px;flex:none;justify-content:center;align-items:center;padding:.35rem .65rem;font-weight:400;text-decoration:none;display:inline-flex}.community-category:hover{color:var(--text-primary);background:var(--bg-hover)}.community-category.active{color:var(--on-accent);background:var(--accent)}.community-state{padding:var(--space-7) 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);color:var(--text-dim);font-size:var(--fs-base);text-align:center}.community-list{border-top:1px solid var(--border)}.community-deck{justify-content:space-between;align-items:center;gap:var(--space-6);border-bottom:1px solid var(--border);min-height:150px;padding:1.35rem 0;display:flex}.community-deck-copy{flex:1;min-width:0}.community-deck-title{align-items:baseline;gap:var(--space-3);min-width:0;display:flex}.community-deck-title h2{color:var(--text-bright);font-size:var(--fs-base);text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.community-deck-category{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-xs);flex-shrink:0}.community-deck-description{max-width:680px;margin-top:var(--space-2);color:var(--text-secondary);font-size:var(--fs-base);line-height:1.6}.community-deck-tags{margin-top:var(--space-3);flex-wrap:wrap;gap:.35rem;display:flex}.community-deck-tags button{border:1px solid var(--border);min-height:0;color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-xs);text-transform:none;letter-spacing:0;border-radius:2px;padding:.15rem .35rem;font-weight:400}.community-deck-tags 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(width<=400px){html{font-size:14px}.app-header{min-height:48px}.app-logo-text{font-size:var(--fs-base)}.header-nav button{min-height:40px;font-size:var(--fs-xs);padding:.3rem .48rem}.dash{padding:var(--space-4) var(--space-3)}.dash-summary{margin-bottom:1.75rem}.deck-btns button{min-height:44px;padding:.35rem .6rem}.deck-quiz{min-height:44px}.arena{padding:var(--space-3) var(--space-3) var(--space-4)}.arena-bar{gap:.3rem}.card-text{font-size:var(--fs-lg);line-height:1.6}.modal-overlay{padding:var(--space-2)}.modal-content{padding:1.25rem}.language-selector select{min-width:44px;min-height:44px}.app-footer{font-size:var(--fs-xs)}}@media (hover:none) and (pointer:coarse){button,.btn{min-height:44px;padding:var(--space-2) var(--space-3)}.deck-btns button{min-width:40px;min-height:40px}.quiz-option{min-height:44px}.rating-row button{min-height:48px;font-size:var(--fs-base)}.kbd-hud{display:none}.card-zone{cursor:default;-webkit-tap-highlight-color:transparent}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.deck-tags{margin-top:var(--space-1);flex-wrap:wrap;gap:.35rem;display:flex}.deck-tag{color:var(--text-dim);font-family:var(--font-mono);font-size:var(--fs-sm);text-transform:uppercase;letter-spacing:.05em;align-items:center;display:inline-flex}.deck-tag:not(:last-child):after{content:"•";color:var(--border-strong);margin-left:.35rem}.deck-lang-badge{font-size:var(--fs-sm);font-family:var(--font-mono);color:var(--accent);text-transform:uppercase;letter-spacing:.05em;background:0 0;align-items:center;padding:0;display:inline-flex}.deck-lang-badge:after{content:"•";color:var(--border-strong);margin-left:.35rem}.mobile-menu-button,.mobile-menu,.mobile-menu-backdrop{display:none}.user-menu-username{color:var(--accent);font-size:var(--fs-base)}.danger-text,.deck-menu button.danger{color:var(--error)}.deck-menu button.danger{margin-top:var(--space-1);border-top:1px solid var(--border)}.deck-menu button.danger:hover{color:var(--error);background:var(--error-dim)}.deck-section-head{gap:var(--space-3) var(--space-4);flex-wrap:wrap}.deck-section-count,.deck-section-tools{align-items:center;gap:.65rem;display:flex}.deck-sort{width:auto;min-height:36px;padding:.3rem var(--space-6) .3rem .55rem}.deck-section-tools>button{min-height:36px;padding:.35rem var(--space-3)}.deck-select-wrap{padding-right:var(--space-3);align-items:center;display:flex}.deck-select-wrap input{cursor:pointer;width:20px;height:20px}.deck-info.selectable{cursor:pointer}.bulk-actions{left:50%;bottom:calc(.75rem + env(safe-area-inset-bottom));z-index:var(--z-bulk-actions);width:min(520px,100vw - 2rem);padding:var(--space-3);border:1px solid var(--border-strong);background:var(--bg-elevated);box-shadow:var(--shadow-bulk);border-radius:2px;align-items:center;gap:.65rem;display:flex;position:fixed;transform:translate(-50%)}.bulk-actions>span{font-size:var(--fs-base);margin-right:auto;font-weight:600}.nav-links{gap:var(--space-4);align-items:center;display:flex}.nav-link{color:var(--text-muted);font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover{color:var(--text-primary)}.nav-link.active{color:var(--accent)}.bulk-delete{background:var(--error-dim)}.ingest-side-panel{gap:var(--space-6);flex-direction:column;display:flex}.ingest-ready{justify-content:space-between;align-items:center;gap:var(--space-4);padding-top:var(--space-2);display:flex}.preview-table-wrap{max-height:260px;overflow:auto}.preview-cards{display:none}.arena{max-width:820px;padding:1.25rem var(--space-5) var(--space-5);flex-direction:column;flex:1;width:100%;margin:0 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