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var(--border);background:none;color:inherit;font:inherit;text-align:left;cursor:pointer;transition:background .14s ease}.plate-menu-row:last-child{border-bottom:0}.plate-menu-row:hover{background:var(--brass-wash)}.plate-menu-row:focus-visible{outline:2px solid var(--accent-light);outline-offset:-2px}.plate-menu-row-title{display:block;margin-bottom:3px;font-family:var(--font-heading);font-size:1.15rem;font-weight:400;color:var(--text-primary)}.plate-menu-row-desc{display:block;font-size:.8rem;line-height:1.4;color:var(--text-secondary)}.prompt-trigger{display:inline-flex;align-items:center;justify-content:center}.btn-caret{width:9px;height:9px;margin-left:8px;opacity:.7;flex-shrink:0}.login-plate{min-width:276px}.login-plate-body{display:flex;flex-direction:column;gap:9px;padding:12px 14px 13px}.login-plate-label{color:var(--brass)}.login-plate-desc,.login-plate-sent{margin:0;font-size:.84rem;line-height:1.45;color:var(--text-secondary)}.login-plate-address{color:var(--text-primary);overflow-wrap:anywhere}.auth-menu-id{padding:12px 14px 11px}.auth-menu-label{display:block;margin-bottom:5px;font-size:.62rem;color:var(--brass)}.auth-menu-email{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-mono);font-size:.8rem;color:var(--text-primary)}.login-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:200}.login-modal-card{position:relative;padding:28px;display:flex;flex-direction:column;gap:12px;width:100%;max-width:340px}.login-modal-card form{display:flex;flex-direction:column;gap:12px}.login-modal-card .btn:disabled{animation:btn-pulse 1.4s ease-in-out infinite;cursor:default}@keyframes btn-pulse{0%,to{opacity:1}50%{opacity:.6}}.login-modal-desc{color:var(--text-secondary);margin:0;font-size:.9rem}.login-modal-error{color:var(--incorrect);font-size:.85rem;margin:0}.login-email-input{background:#e9e6e00d;border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;color:var(--text-primary);font-size:.95rem}.login-email-input:focus{outline:none;border-color:var(--accent-light)}.modal-close{position:absolute;top:12px;right:12px;background:none;border:none;color:var(--text-secondary);font-size:1.2rem;line-height:1;padding:4px}.modal-close:hover{color:var(--text-primary)}#error-toast{position:fixed;bottom:32px;left:50%;transform:translate(-50%) translateY(200px);opacity:0;background:#1c0d0c;border:1px solid var(--incorrect);border-radius:var(--radius);color:#ffb3ad;padding:16px 20px;max-width:480px;width:calc(100% - 48px);font-size:.9rem;white-space:pre-wrap;z-index:100;transition:transform .3s ease,opacity .3s ease;pointer-events:none}#error-toast.visible{transform:translate(-50%) translateY(0);opacity:1;pointer-events:auto}#error-toast .toast-close{position:absolute;top:10px;right:12px;background:none;border:none;color:#ffb3ad;font-size:1.1rem;cursor:pointer}.progress-header{display:flex;align-items:center;gap:16px;margin-bottom:28px}.abandon-btn{background:none;border:none;color:var(--text-secondary);font-size:1rem;padding:4px 8px;flex-shrink:0}.abandon-btn:hover{color:var(--text-primary)}.progress-text{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--brass);white-space:nowrap;flex-shrink:0}.progress-bar{flex:1;height:3px;background:var(--border);border-radius:0;overflow:hidden}.progress-fill{height:100%;width:100%;background:var(--accent);border-radius:0;transform-origin:left;transform:scaleX(0);transition:transform .3s ease}.graph-area{height:240px;margin-bottom:20px;border-radius:var(--radius);overflow:hidden;position:relative;padding:26px 10px 22px 42px}.graph-area canvas{display:block;width:100%!important;height:100%!important}.graph-title{position:absolute;top:4px;left:0;right:0;text-align:center;font-size:.8rem;color:#e1e5ebd9}.graph-xlabel{position:absolute;bottom:2px;left:0;right:0;text-align:center;font-size:.78rem;color:#e1e5eb99}.graph-ylabel-wrap{position:absolute;left:0;top:0;width:42px;height:100%;display:flex;align-items:center;justify-content:center;transform:rotate(-90deg)}.graph-ylabel{font-size:.78rem;color:#e1e5eb99;white-space:nowrap}.graph-title .katex,.graph-xlabel .katex,.graph-ylabel .katex{font-size:1em}.graph-tooltip{position:fixed;z-index:300;max-width:200px;padding:5px 9px;background:#080d16f2;border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:.72rem;line-height:1.3;text-align:center;white-space:normal;word-break:break-word;pointer-events:none;box-shadow:0 4px 14px #00000073;animation:graph-tooltip-in .1s ease-out}.graph-tooltip--top{transform:translate(-50%,-100%)}.graph-tooltip--bottom{transform:translate(-50%)}.graph-tooltip--right{transform:translateY(-50%)}@keyframes graph-tooltip-in{0%{opacity:0}to{opacity:1}}.graph-error{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:.9rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.table-area{position:relative;margin-bottom:20px;padding:18px 0 8px;overflow:hidden}.table-area caption{padding:0 20px 12px;text-align:center;font-size:.8rem;color:#e1e5ebd9}.table-scroll{overflow-x:auto}.table-area table{width:100%;border-collapse:collapse;font-size:.9rem}.table-area th,.table-area td{padding:10px 20px;text-align:left;white-space:nowrap}.table-area thead th{color:var(--text-primary);font-weight:600;border-bottom:1px solid var(--border)}.table-area tbody td{color:var(--text-secondary);border-bottom:1px solid rgba(233,230,224,.05)}.table-area tbody tr:last-child td{border-bottom:none}.table-area th.table-cell-numeric,.table-area td.table-cell-numeric{text-align:right;font-variant-numeric:tabular-nums}.table-area th .katex,.table-area td .katex,.table-area caption .katex{font-size:1em}.table-fade{position:absolute;top:18px;bottom:8px;width:32px;pointer-events:none;opacity:0;transition:opacity .15s ease}.table-fade.visible{opacity:1}.table-fade-left{left:0;background:linear-gradient(to right,var(--surface),transparent)}.table-fade-right{right:0;background:linear-gradient(to left,var(--surface),transparent)}.question-text{font-family:var(--font-heading);font-size:1.5rem;font-weight:400;line-height:1.5;letter-spacing:-.005em;margin-bottom:30px;max-width:62ch}.fill-blank-text{line-height:2.1}.fill-blank-seg{white-space:pre-wrap}.fill-blank-input{display:inline-block;vertical-align:baseline;max-width:100%;min-width:0;margin:0 1px;padding:0 3px 2px;background:transparent;border:none;border-bottom:1px solid var(--text-secondary);border-radius:0;color:var(--text-primary);font-family:var(--font-mono);font-size:.86em;letter-spacing:.01em;text-align:center;transition:border-color .15s,background-color .15s}.fill-blank-input:focus{outline:none;border-bottom-color:var(--accent-light);background:#93b8f514}.fill-blank-input:disabled{opacity:1;cursor:default}.fill-blank-input.correct-answer{border:1px solid var(--correct);border-radius:var(--radius-sm);background:#63bd801f}.fill-blank-input.wrong-answer{border:1px solid var(--incorrect);border-radius:var(--radius-sm);background:#e35f5a1f}.answer-btn{display:flex;align-items:center;gap:16px;width:100%;text-align:left;background:none;border:1px solid transparent;border-bottom-color:var(--border);border-radius:var(--radius-md);padding:15px 18px;margin-bottom:2px;color:var(--text-primary);font-size:1rem;transition:background .14s,border-color .14s,transform 90ms}.answer-btn:not(:disabled):not(.selected-answer):hover{background:var(--brass-wash);border-bottom-color:var(--border-strong)}.answer-btn:not(:disabled):active{transform:translateY(1px)}.answer-btn:disabled{cursor:default}.answer-btn.correct-answer{background:#63bd801f!important;border-color:var(--correct)!important;opacity:1!important}.answer-btn.wrong-answer{background:#e35f5a1f!important;border-color:var(--incorrect)!important;opacity:1!important}.answer-btn.selected-answer{border-color:var(--accent);background:var(--accent-wash)}.answer-label{font-family:var(--font-mono);font-size:.72rem;font-weight:500;letter-spacing:.08em;color:var(--brass-dim);flex-shrink:0;width:18px;transition:color .14s}.answer-btn:hover .answer-label{color:var(--brass)}.answer-btn.selected-answer .answer-label{color:var(--accent-light)}.answer-text{flex:1}.answer-checkbox{font-size:1.05rem;flex-shrink:0;width:18px;color:var(--accent-light)}.order-list{margin-bottom:10px;position:relative}.order-list.dragging{touch-action:none}.order-item{display:flex;align-items:center;gap:12px;width:100%;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:12px 16px;margin-bottom:8px;color:var(--text-primary);transition:background .15s,border-color .15s;cursor:grab;user-select:none;-webkit-user-select:none;touch-action:pan-y}.order-item:not(.order-item-locked):hover{border-color:var(--border-strong)}.order-item:not(.order-item-locked):active{cursor:grabbing}.order-item-locked{cursor:default}.order-item.correct-answer{background:#63bd801f!important;border-color:var(--correct)!important}.order-item.wrong-answer{background:#e35f5a1f!important;border-color:var(--incorrect)!important}.order-item-placeholder{background:transparent;border:1px dashed var(--border)}.order-item-placeholder>*{visibility:hidden}.order-item-floating{z-index:20;pointer-events:none;box-shadow:0 8px 24px #0006;border-color:var(--accent-light)}.order-handle{color:var(--brass-dim);flex-shrink:0;font-size:1rem}.order-index{font-family:var(--font-mono);font-size:.72rem;font-weight:500;letter-spacing:.08em;color:var(--brass);flex-shrink:0;width:18px}.order-text{flex:1}.numeric-text-input{display:block;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;color:var(--text-primary);font-size:1rem;margin-bottom:10px;transition:border-color .15s}.numeric-text-input:focus{outline:none;border-color:var(--accent-light)}.numeric-text-input.correct-answer{border-color:var(--correct)!important;background:#63bd801f!important}.numeric-text-input.wrong-answer{border-color:var(--incorrect)!important;background:#e35f5a1f!important}.numeric-slider-wrap{display:flex;flex-direction:column;align-items:center;gap:10px;margin-bottom:16px}.numeric-slider-value{font-family:var(--font-mono);font-size:1rem;font-weight:500;letter-spacing:.04em;color:var(--accent-light)}.numeric-slider-wrap.correct-answer .numeric-slider-value{color:var(--correct)}.numeric-slider-wrap.wrong-answer .numeric-slider-value{color:var(--incorrect)}.numeric-slider{width:100%;height:22px;background:transparent;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none}.numeric-slider:disabled{cursor:default}.numeric-slider::-webkit-slider-runnable-track{height:6px;border-radius:1px;border:1px solid var(--border);background:linear-gradient(to right,var(--accent) var(--fill-pct, 0%),var(--surface-hover) var(--fill-pct, 0%))}.numeric-slider::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:18px;border-radius:1px;background:var(--accent);border:2px solid var(--text-primary);margin-top:-7px;transition:transform .1s}.numeric-slider:not(:disabled)::-webkit-slider-thumb:active{transform:scale(1.15)}.numeric-slider::-moz-range-track{height:6px;border-radius:1px;background:var(--surface-hover);border:1px solid var(--border)}.numeric-slider::-moz-range-progress{height:6px;border-radius:1px;background:var(--accent)}.numeric-slider::-moz-range-thumb{width:14px;height:18px;border-radius:1px;background:var(--accent);border:2px solid var(--text-primary)}.quiz-check-btn{width:100%;margin-bottom:10px}.format-unsupported{padding:18px;text-align:center;color:var(--text-secondary);margin-bottom:10px}.code-editor{border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;margin-bottom:12px}.code-editor .cm-scroller{min-height:160px;max-height:420px}.code-editor-fallback{display:block;width:100%;min-height:160px;background:var(--surface);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-md);font-family:var(--font-mono);font-size:.9rem;padding:12px;resize:vertical}.code-results{display:flex;flex-direction:column;gap:6px;margin-bottom:10px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);font-size:.85rem}.code-results.correct-answer{border-color:var(--correct)!important}.code-results.wrong-answer{border-color:var(--incorrect)!important}.code-results-running{flex-direction:row;align-items:center;gap:8px;color:var(--text-secondary)}.code-results-spinner{width:14px;height:14px;border-radius:50%;border:2px solid var(--border-strong);border-top-color:var(--accent-light);animation:code-spin .7s linear infinite}@keyframes code-spin{to{transform:rotate(360deg)}}.code-result-row code{font-family:var(--font-mono)}.code-result-pass{color:var(--correct)}.code-result-fail{color:var(--incorrect)}.code-review-checks{display:flex;flex-direction:column;gap:6px;margin-bottom:10px;padding:14px 16px;font-size:.85rem;color:var(--text-secondary)}.code-check-row code{font-family:var(--font-mono);color:var(--text-primary)}.code-breakdown-block{margin:6px 0 0;padding:10px 12px;background:var(--surface-hover);border:1px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:.82rem;white-space:pre-wrap;word-break:break-word;color:var(--text-primary)}.code-breakdown-expected{color:var(--text-secondary)}#quiz-feedback{margin-top:16px;min-height:22px}#quiz-feedback-msg{font-size:.9rem}#quiz-feedback-msg.correct{color:var(--correct)}#quiz-feedback-msg.incorrect{color:var(--incorrect)}.quiz-nav-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;margin-top:24px}#quiz-feedback+.quiz-nav-row{margin-top:8px}.quiz-nav-row button:disabled{opacity:.35;cursor:default}.quiz-nav-back{grid-column:1;justify-self:start}.quiz-nav-mid{grid-column:2;justify-self:center}.quiz-nav-next{grid-column:3;justify-self:end}#quiz-timer{color:var(--brass);font-size:.72rem;font-weight:500;letter-spacing:.1em;font-variant-numeric:tabular-nums;font-family:var(--font-mono)}.screen-header{display:flex;align-items:center;gap:16px;margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid var(--border)}.screen-header h2{margin:0}#mode-screen .deck-subtitle{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--brass);margin:0 0 36px}.mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:28px}.mode-card{padding:22px 20px 20px;cursor:pointer;text-align:left;border:1px solid var(--border);background:none;border-radius:var(--radius-md);transition:border-color .15s,background .15s;-webkit-user-select:none;user-select:none}.mode-card:hover{background:var(--brass-wash);border-color:var(--border-strong)}.mode-card.selected{border-color:var(--accent);background:var(--accent-wash)}.mode-card .mode-icon{display:flex;align-items:center;margin-bottom:14px;color:var(--brass-dim);transition:color .15s}.mode-card:hover .mode-icon{color:var(--brass)}.mode-card .mode-icon svg{width:24px;height:24px}.mode-card.selected .mode-icon{color:var(--accent-light)}.mode-card .mode-name{font-family:var(--font-heading);font-weight:400;font-size:1.3rem;color:var(--text-primary);margin-bottom:6px}.mode-card .mode-desc{font-size:.82rem;color:var(--text-secondary);line-height:1.5}.toggle-label{position:relative;display:flex;align-items:center;gap:10px;cursor:pointer;color:var(--text-secondary);font-size:.9rem;-webkit-user-select:none;user-select:none}.toggle-label input[type=checkbox]{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.toggle-label input:focus-visible+.toggle-track{border-color:var(--accent-light)}.toggle-track{width:38px;height:20px;background:var(--surface-hover);border:1px solid var(--border);border-radius:var(--radius-sm);position:relative;transition:background .2s,border-color .2s;flex-shrink:0}.toggle-track:after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;background:var(--text-secondary);border-radius:1px;transition:transform .2s,background .2s}.toggle-label input:checked+.toggle-track{background:var(--accent);border-color:var(--accent)}.toggle-label input:checked+.toggle-track:after{transform:translate(18px);background:#fff}.mode-start-row{display:flex;align-items:center;gap:20px}#mode-start-btn{padding:12px 36px;font-size:1rem;flex-shrink:0}.mode-order-toggle{opacity:0;transform:translate(-14px);visibility:hidden;transition:opacity .18s ease,transform .18s ease,visibility 0s linear .18s}.mode-order-toggle.shown{opacity:1;transform:none;visibility:visible;transition:opacity .22s ease,transform .22s ease,visibility 0s}.mode-order-name{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--brass)}@media (prefers-reduced-motion: reduce){.mode-order-toggle,.mode-order-toggle.shown{transform:none;transition:opacity 1ms linear,visibility 0s}}.stats-summary{display:flex;align-items:center;gap:32px;margin-bottom:32px;flex-wrap:wrap}.stats-pie-wrap{position:relative;width:150px;height:150px;flex-shrink:0}.stats-pie-center{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;pointer-events:none}#stats-score-pct{font-family:var(--font-heading);font-size:2.2rem;font-weight:400;line-height:1;color:var(--text-primary)}#stats-score-line{font-family:var(--font-heading);font-size:1.6rem;font-weight:400;margin-bottom:8px}#stats-duration-line{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--brass)}.breakdown-item{padding:14px 4px;margin-bottom:0;background:none;border:0;border-bottom:1px solid var(--border);border-radius:0}.breakdown-item:before,.breakdown-item:after{display:none}.breakdown-item:hover{background:none}.breakdown-correct-top{display:flex;align-items:center;gap:10px}.breakdown-check{color:var(--correct);flex-shrink:0}.breakdown-q-collapsed{flex:1;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.92rem}.breakdown-item.wrong .breakdown-q-text{margin-bottom:12px;font-size:1rem;line-height:1.5}.breakdown-answer-row{font-size:.88rem;margin-bottom:6px}.breakdown-answer-row.wrong-row{color:var(--incorrect)}.breakdown-answer-row.correct-row{color:var(--correct)}.copy-ai-btn{margin-top:8px;font-size:.82rem;padding:6px 14px}.stats-actions{display:flex;gap:12px;margin-top:24px}.review-progress-text{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--brass);margin-left:auto}.review-nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;margin-top:24px}.review-nav button:disabled{opacity:.35;cursor:default}.review-nav-prev{grid-column:1;justify-self:start}.review-nav-mid{grid-column:2;justify-self:center}.review-nav-next{grid-column:3;justify-self:end}@property --mode-tint{syntax: "<color>"; inherits: true; initial-value: #3a6dc0;}@property --mode-light{syntax: "<color>"; inherits: true; initial-value: #93b8f5;}@property --mode-fill{syntax: "<color>"; inherits: true; initial-value: #35619f;}@property --mode-veil{syntax: "<color>"; inherits: true; initial-value: rgba(20,38,66,.55);}#flashcard-screen{display:flex;flex-direction:column;min-height:calc(100vh - 168px);min-height:calc(100dvh - 168px);--mode-tint: var(--mode-standard-tint);--mode-light: var(--mode-standard-light);--mode-fill: var(--mode-standard-fill);--mode-veil: var(--mode-standard-veil);transition:--mode-tint .7s ease,--mode-light .7s ease,--mode-fill .7s ease,--mode-veil .7s ease}#flashcard-screen[data-mode=mastery]{--mode-tint: var(--mode-mastery-tint);--mode-light: var(--mode-mastery-light);--mode-fill: var(--mode-mastery-fill);--mode-veil: var(--mode-mastery-veil)}@media (prefers-reduced-motion: reduce){#flashcard-screen{transition:none}}#flashcard-screen .btn:not(.btn-danger){background:var(--mode-fill);border-color:var(--mode-fill)}#flashcard-screen .btn:not(.btn-danger):hover{background:var(--mode-tint);border-color:var(--mode-tint)}#flashcard-screen .toggle-label input:checked+.toggle-track{background:var(--mode-tint);border-color:var(--mode-tint)}#flashcard-screen .toggle-label input:focus-visible+.toggle-track{border-color:var(--mode-light)}.flash-options{display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;min-height:38px;margin-bottom:18px}.mode-pill{position:relative;display:inline-flex;padding:3px;background:var(--surface);border:1px solid color-mix(in srgb,var(--mode-tint) 22%,var(--border));border-radius:var(--radius-md)}.mode-pill-thumb{position:absolute;top:3px;bottom:3px;left:3px;width:calc((100% - 6px)/2);background:var(--mode-fill);border-radius:var(--radius-sm);transition:transform .22s cubic-bezier(.4,0,.2,1)}.mode-pill-thumb[data-mode=mastery]{transform:translate(100%)}.mode-pill-option{position:relative;cursor:pointer;-webkit-user-select:none;user-select:none;flex:1 0 0;min-width:78px;text-align:center;padding:5px 14px;font-size:.88rem}.mode-pill-option span{display:block;font-family:var(--font-mono);font-size:.68rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--text-secondary);transition:color .2s}.mode-pill-option input[type=radio]{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.mode-pill-option input:checked+span{color:#fff}.mode-pill-option input:focus-visible+span{outline:1px solid var(--mode-light);outline-offset:4px;border-radius:999px}@media (prefers-reduced-motion: reduce){.mode-pill-thumb{transition:none}}.flash-settings-btn{display:inline-flex;align-items:center;gap:10px;padding:6px 12px;font-size:.82rem}.flash-settings-btn svg{flex:none}.flash-progress-text{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--mode-light)}.flash-streak{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:4px}.flash-streak-track{display:flex;gap:4px}.flash-streak-seg{width:34px;height:4px;border-radius:999px;background:color-mix(in srgb,var(--mode-tint) 26%,var(--border));transition:background .26s ease,box-shadow .26s ease}.flash-streak-seg[data-on=yes]{background:var(--mode-light)}.flash-streak[data-mastered=yes] .flash-streak-seg{box-shadow:0 0 8px color-mix(in srgb,var(--mode-light) 55%,transparent)}.flash-streak-label{min-width:74px;font-family:var(--font-mono);font-size:.66rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--text-secondary)}.flash-streak[data-mastered=yes] .flash-streak-label{color:var(--mode-light)}@media (prefers-reduced-motion: reduce){.flash-streak-seg{transition:none}}.flash-settings-wrap{position:relative;margin-left:auto;z-index:30}.flash-settings-btn[aria-expanded=true]{color:var(--mode-light);border-color:color-mix(in srgb,var(--mode-tint) 55%,var(--border))}.flash-settings-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:30;width:260px;max-width:calc(100vw - 48px);padding:14px;background:var(--surface);border:1px solid color-mix(in srgb,var(--mode-tint) 30%,var(--border));border-radius:var(--radius-md);box-shadow:0 14px 34px #0000006b}.flash-settings-toggle{align-items:flex-start;margin-bottom:10px;color:var(--text);font-size:.82rem}.flash-settings-toggle:last-child{margin-bottom:0}.flash-settings-toggle .toggle-track{margin-top:1px}.flash-settings-name{display:flex;flex-direction:column}.flash-settings-reset{display:block;width:100%;margin-top:12px;padding:9px 0 0;border:0;border-top:1px solid var(--border);background:none;color:var(--incorrect);font:inherit;font-size:.82rem;text-align:left;cursor:pointer}.flash-settings-reset:hover{color:color-mix(in srgb,var(--incorrect) 70%,#fff)}.flash-settings-reset:focus-visible{outline:2px solid var(--incorrect);outline-offset:2px;border-radius:4px}#flash-active-area{position:relative;display:flex;flex-direction:column;flex:1;min-height:0}#flash-active-area:before{content:"";position:absolute;top:-40px;right:-24px;bottom:-64px;left:-24px;background:radial-gradient(ellipse 46% 44% at 50% 50%,var(--mode-veil),transparent 100%);pointer-events:none}.flash-ambience{--amb-standard: var(--mode-standard-light);--amb-mastery: var(--mode-mastery-light);position:absolute;top:-32px;left:-24px;width:calc(100% + 48px);height:calc(100% + 104px);pointer-events:none;-webkit-mask-image:radial-gradient(ellipse 78% 82% at 50% 50%,#000 55%,transparent 100%);mask-image:radial-gradient(ellipse 78% 82% at 50% 50%,#000 55%,transparent 100%);opacity:.85}@media (max-width: 560px){.flash-ambience{height:calc(100% + 200px)}#flash-active-area:before{top:-32px;right:-24px;bottom:-160px;left:-24px}.flash-options{column-gap:14px;min-height:44px}.flash-options .flash-undo-btn{width:44px;height:44px}.flash-settings-btn{padding:10px}.flash-settings-word{display:none}#flashcard-screen .screen-header{flex-wrap:wrap;row-gap:6px}#flashcard-screen .flash-progress-text{flex-basis:100%;margin-left:0}}#flash-card-wrap{position:relative;display:flex;flex:1;justify-content:center;min-height:280px;max-height:500px;margin:28px 0 20px}#flash-card{width:100%;max-width:760px;align-self:stretch;perspective:1400px;cursor:pointer;touch-action:pan-y;-webkit-user-select:none;user-select:none;transition:transform .3s cubic-bezier(.22,1,.36,1)}#flash-card[data-dragging=yes]{transition:none;cursor:grabbing}#flash-card[data-swipe=right]{--swipe-hue: var(--mode-tint);--swipe-ink: var(--mode-light);--swipe-wash: 90deg}#flash-card[data-swipe=left]{--swipe-hue: var(--incorrect);--swipe-ink: var(--incorrect);--swipe-wash: 270deg}@media (max-width: 560px){#flash-card-wrap{min-height:300px;max-height:420px;margin:20px 0 16px}#flashcard-screen{min-height:calc(100dvh - 96px)}}#flashcard-screen[data-actions=hidden] #flash-card-wrap{max-height:560px;margin-bottom:14px}@media (max-height: 820px){#flash-card{max-width:640px}}@media (max-height: 680px){#flashcard-screen{min-height:0}#flash-card{max-width:560px}#flash-card-wrap{margin:20px 0 16px}}.card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .4s ease}#flash-card.flipped .card-inner{transform:rotateY(180deg)}.card-front,.card-back{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;padding:clamp(32px,4.5vw,56px);text-align:center;font-family:var(--font-heading);font-weight:400;font-size:clamp(1.45rem,1.1rem + 1vw,2.05rem);line-height:1.4;letter-spacing:-.005em;background:linear-gradient(158deg,color-mix(in srgb,var(--mode-tint) 9%,var(--surface)) 0%,var(--surface) 62%);border:1px solid color-mix(in srgb,var(--mode-tint) 32%,var(--border));border-radius:var(--radius)}.card-back{transform:rotateY(180deg);color:var(--mode-light)}.card-front>*,.card-back>*{opacity:calc(1 - var(--swipe-p, 0) * 2.8);transition:opacity .2s ease}#flash-card[data-dragging=yes] .card-front>*,#flash-card[data-dragging=yes] .card-back>*{transition:none}.flash-swipe-cue{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;padding:24px;transform:translateZ(1px);border:2px solid var(--swipe-hue, transparent);border-radius:var(--radius);background:linear-gradient(var(--swipe-wash, 90deg),transparent 34%,color-mix(in srgb,var(--swipe-hue, transparent) 26%,transparent) 100%);box-shadow:0 0 34px -8px color-mix(in srgb,var(--swipe-hue, transparent) 70%,transparent);opacity:calc(var(--swipe-p, 0) * 1.9);transition:opacity .2s ease;pointer-events:none}#flash-card[data-dragging=yes] .flash-swipe-cue,#flash-card[data-dragging=yes] .flash-swipe-cue span{transition:none}.flash-swipe-cue span{opacity:calc((var(--swipe-p, 0) - .34) * 3.3);transition:opacity .2s ease;font-family:var(--font-heading);font-weight:700;font-size:clamp(1.4rem,1.1rem + .95vw,1.9rem);letter-spacing:-.01em;line-height:1.2;text-align:center;color:var(--swipe-ink, var(--text))}.card-front.has-graph,.card-back.has-graph{flex-direction:column;gap:14px;padding:clamp(18px,3vw,32px)}.has-graph .graph-area{height:auto;flex:1 1 auto;min-height:0;width:100%;margin-bottom:0}.has-graph .card-text{flex:0 0 auto;font-size:clamp(1rem,.9rem + .4vw,1.2rem);line-height:1.45}#flash-card.flash-exit-right{animation:flash-exit-right .35s ease forwards}#flash-card.flash-exit-left{animation:flash-exit-left .35s ease forwards}@keyframes flash-exit-right{0%{transform:translate3d(var(--exit-from, 0px),0,0) rotate(var(--exit-rot, 0deg));opacity:1}to{transform:translate(120%,7%) rotate(5deg);opacity:0}}@keyframes flash-exit-left{0%{transform:translate3d(var(--exit-from, 0px),0,0) rotate(var(--exit-rot, 0deg));opacity:1}to{transform:translate(-120%,7%) rotate(-5deg);opacity:0}}.flash-hint{position:relative;text-align:center;font-family:var(--font-mono);font-size:.68rem;font-weight:500;letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--text-secondary);max-height:3rem;margin:0 0 24px;overflow:hidden;transition:opacity .24s ease,max-height .24s ease,margin-bottom .24s ease}.flash-hint.is-gone{opacity:0;max-height:0;margin-bottom:0}@media (prefers-reduced-motion: reduce){.flash-hint{transition:none}}.flash-actions{position:relative;display:flex;justify-content:center;align-items:center;gap:16px}#flashcard-screen[data-actions=hidden] .flash-actions{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.flash-nav-btn{display:inline-flex;align-items:center;justify-content:center;width:88px;height:46px;background:var(--surface-hover);color:var(--text-primary);border:1px solid var(--border);border-radius:var(--radius-md);font-size:1.25rem;line-height:1;transition:background .15s,border-color .15s,transform .1s ease}.flash-nav-btn:hover:not(:disabled){background:color-mix(in srgb,var(--surface-hover) 88%,#fff);border-color:color-mix(in srgb,var(--mode-tint) 45%,var(--border-strong))}.flash-nav-btn:active:not(:disabled){transform:translateY(1px)}.flash-nav-btn:disabled{opacity:.35;cursor:default}.flash-undo-btn{display:inline-flex;align-items:center;justify-content:center;flex:none;width:38px;height:38px;padding:0;background:transparent;color:var(--text-secondary);border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:background .15s,border-color .15s,color .15s,transform .1s ease}.flash-undo-btn:hover:not(:disabled){background:var(--surface-hover);border-color:var(--border);color:var(--text-primary)}.flash-undo-btn:active:not(:disabled){transform:translateY(1px)}.flash-undo-btn:disabled{opacity:.3;cursor:default;color:var(--text-secondary);border-color:transparent;background:transparent}#flash-complete-area{display:flex;flex:1;align-items:center;justify-content:center;padding:40px 0}.flash-complete-card{padding:32px;text-align:center;max-width:420px;border-color:color-mix(in srgb,var(--mode-tint) 28%,var(--border))}.flash-complete-card h3{margin-bottom:12px}.flash-complete-card p{color:var(--text-secondary);margin-bottom:20px}.share-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000008c;display:flex;align-items:center;justify-content:center;z-index:200}.share-modal-card{position:relative;padding:28px;display:flex;flex-direction:column;gap:14px;width:100%;max-width:420px}.share-modal-desc{color:var(--text-secondary);margin:0;font-size:.9rem;line-height:1.5}.share-modal-desc strong{color:var(--text-primary);font-weight:600}.share-modal-error{color:var(--incorrect);font-size:.85rem;margin:0}.share-modal-working{animation:btn-pulse 1.4s ease-in-out infinite}.share-link-input{background:#e9e6e00d;border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;color:var(--text-primary);font-family:var(--font-mono);font-size:.82rem;width:100%;overflow-x:auto}.share-link-input:focus{outline:none;border-color:var(--accent-light)}.share-hero{padding-bottom:8px;margin-bottom:24px}.share-hero-inner{position:relative;z-index:1;padding:32px 16px 16px}.share-hero-inner .subtitle{margin-bottom:0}.share-panel{padding:28px;max-width:520px;margin:0 auto;display:flex;flex-direction:column;gap:14px}.share-panel h3{margin:0}.share-panel-desc{color:var(--text-secondary);margin:0;line-height:1.55}.share-panel-note{margin-top:8px;font-size:.88em}.share-panel-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}