:root{--bg-color: #f4f4f9;--card-color: #ffffff;--primary-color: #0055a5;--primary-dark-color: color-mix(in srgb, var(--primary-color), black 20%);--on-primary-text: #ffffff;--text-color: #333;--success-color: #28a745;--error-color: #dc3545;--mastery-new-bg: #dee2e6;--mastery-new-text: #495057;--mastery-incorrect-bg: var(--error-color);--mastery-incorrect-text: #ffffff;--mastery-learning-low-bg: color-mix( in srgb, var(--success-color), white 80% );--mastery-learning-low-text: color-mix( in srgb, var(--success-color), black 60% );--mastery-learning-high-bg: color-mix( in srgb, var(--success-color), white 40% );--mastery-learning-high-text: #ffffff;--mastery-mastered-low-bg: #ffd700;--mastery-mastered-low-text: #5c4d00;--mastery-mastered-high-bg: #ffcc00;--mastery-mastered-high-text: #5c4d00;--neutral-100: #ffffff;--neutral-200: #f8f9fa;--neutral-300: #dee2e6;--neutral-700: #495057;--border-color: #ddd;--border-light: #eee;--border-dashed: #ccc;--border-subtle: #f0f0f0;--text-muted: #666;--text-muted-light: #999;--highlight-bg: color-mix(in srgb, var(--primary-color), white 90%);--feedback-bg: color-mix(in srgb, var(--primary-color), white 92%);--success-light-bg: color-mix(in srgb, var(--success-color), white 90%);--error-light-bg: color-mix(in srgb, var(--error-color), white 92%);--error-alert-bg: color-mix(in srgb, var(--error-color), white 80%);--error-alert-text: color-mix(in srgb, var(--error-color), black 40%);--learning-text: color-mix(in srgb, var(--success-color), gray 40%)}@media(prefers-color-scheme:dark){body:not(.light-mode){--bg-color: #121212;--card-color: #1e1e1e;--primary-color: #4da3ff;--primary-dark-color: color-mix(in srgb, var(--primary-color), white 20%);--on-primary-text: #000000;--text-color: #e0e0e0;--success-color: #4cd964;--error-color: #ff3b30;--mastery-new-bg: #2c2c2c;--mastery-new-text: #adb5bd;--mastery-incorrect-bg: color-mix(in srgb, var(--error-color), black 80%);--mastery-incorrect-text: color-mix(in srgb, var(--error-color), white 60%);--mastery-learning-low-bg: color-mix( in srgb, var(--success-color), black 80% );--mastery-learning-low-text: color-mix( in srgb, var(--success-color), white 60% );--mastery-learning-high-bg: color-mix( in srgb, var(--success-color), black 60% );--mastery-learning-high-text: #ffffff;--mastery-mastered-low-bg: #8b6b00;--mastery-mastered-low-text: #ffe066;--mastery-mastered-high-bg: #ffd700;--mastery-mastered-high-text: #5c4d00;--neutral-100: #2d2d2d;--neutral-200: #333333;--neutral-300: #444444;--neutral-700: #bbbbbb;--border-color: #444;--border-light: #333;--border-dashed: #555;--border-subtle: #2a2a2a;--text-muted: #aaaaaa;--text-muted-light: #777777;--highlight-bg: #1a2733;--feedback-bg: #1a2733;--success-light-bg: color-mix(in srgb, var(--success-color), black 80%);--error-light-bg: color-mix(in srgb, var(--error-color), black 90%);--error-alert-bg: color-mix(in srgb, var(--error-color), black 80%);--error-alert-text: color-mix(in srgb, var(--error-color), white 60%);--learning-text: color-mix(in srgb, var(--success-color), white 60%)}}body.dark-mode{--bg-color: #121212;--card-color: #1e1e1e;--primary-color: #4da3ff;--primary-dark-color: color-mix(in srgb, var(--primary-color), white 20%);--on-primary-text: #000000;--text-color: #e0e0e0;--success-color: #4cd964;--error-color: #ff3b30;--mastery-new-bg: #2c2c2c;--mastery-new-text: #adb5bd;--mastery-incorrect-bg: color-mix(in srgb, var(--error-color), black 80%);--mastery-incorrect-text: color-mix(in srgb, var(--error-color), white 60%);--mastery-learning-low-bg: color-mix( in srgb, var(--success-color), black 80% );--mastery-learning-low-text: color-mix( in srgb, var(--success-color), white 60% );--mastery-learning-high-bg: color-mix( in srgb, var(--success-color), black 60% );--mastery-learning-high-text: #ffffff;--mastery-mastered-low-bg: #8b6b00;--mastery-mastered-low-text: #ffe066;--mastery-mastered-high-bg: #ffd700;--mastery-mastered-high-text: #5c4d00;--neutral-100: #2d2d2d;--neutral-200: #333333;--neutral-300: #444444;--neutral-700: #bbbbbb;--border-color: #444;--border-light: #333;--border-dashed: #555;--border-subtle: #2a2a2a;--text-muted: #aaaaaa;--text-muted-light: #777777;--highlight-bg: #1a2733;--feedback-bg: #1a2733;--success-light-bg: color-mix(in srgb, var(--success-color), black 80%);--error-light-bg: color-mix(in srgb, var(--error-color), black 90%);--error-alert-bg: color-mix(in srgb, var(--error-color), black 80%);--error-alert-text: color-mix(in srgb, var(--error-color), white 60%);--learning-text: color-mix(in srgb, var(--success-color), white 60%)}.m-new{background-color:var(--mastery-new-bg)!important;color:var(--mastery-new-text)!important}.m-review{background-color:var(--mastery-incorrect-bg)!important;color:var(--mastery-incorrect-text)!important}.m-learning{background-color:var(--mastery-learning-high-bg)!important;color:var(--mastery-learning-high-text)!important}.m-mastered{background-color:var(--mastery-mastered-high-bg)!important;color:var(--mastery-mastered-high-text)!important}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);margin:0;padding:0;min-height:100vh;font-size:1rem}*{box-sizing:border-box}#app{background:var(--card-color);width:100%;max-width:600px;padding:30px;border-radius:8px;box-shadow:0 4px 6px #0000001a;margin:20px auto;position:relative}.theme-toggle-container{position:absolute;top:10px;right:10px}#theme-toggle{background:none;border:1px solid var(--border-color);border-radius:50%;width:48px;height:48px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1.5rem;transition:all .2s;color:var(--text-color)}#theme-toggle:hover{background-color:var(--neutral-200);transform:scale(1.1)}h1{margin-top:0;color:var(--primary-color);font-size:1.5rem}.back-btn{background:var(--neutral-200);border:1px solid var(--border-color);padding:8px 16px;border-radius:6px;cursor:pointer;font-size:1rem;color:var(--text-color);display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s;min-height:44px}.back-btn:hover{background-color:var(--neutral-300);border-color:var(--primary-color)}.stats-bar{display:flex;justify-content:space-between;margin-bottom:20px;font-size:1.1rem;color:var(--text-muted);border-bottom:1px solid var(--border-light);padding-bottom:10px;align-items:center}.mastery-badge-container{display:flex;align-items:center;gap:8px;margin-bottom:15px}.mastery-badge-arrow{font-weight:700;font-size:1.2rem;color:var(--neutral-500)}.mastery-badge{display:inline-block;padding:4px 10px;border-radius:4px;font-size:.95rem;font-weight:700;transition:all .3s ease;white-space:nowrap}@keyframes mastery-pulse{0%{box-shadow:0 0 0 0 var(--pulse-color, rgba(0, 85, 165, .4))}70%{box-shadow:0 0 0 10px var(--pulse-color-transparent, rgba(0, 85, 165, 0))}to{box-shadow:0 0 0 0 var(--pulse-color-transparent, rgba(0, 85, 165, 0))}}.mastery-badge.animate-glow{animation:mastery-pulse .8s ease-out}.mastery-badge.m-mastered{border:1px solid gold!important;--pulse-color: rgba(255, 215, 0, .6);--pulse-color-transparent: rgba(255, 215, 0, 0)}button.menu-btn.m-review:hover{filter:brightness(1.1)}.question-text{font-size:1.4rem;font-weight:600;margin-bottom:25px;line-height:1.5}.question-image-container{margin-bottom:20px;text-align:center}.question-image-container img{max-width:100%;height:auto;border-radius:6px;box-shadow:0 2px 4px #0000000d;touch-action:manipulation}.options-grid{display:flex;flex-direction:column;gap:10px}.options-grid.grid-2x2{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto auto}button.option-btn{background:var(--neutral-100);border:2px solid var(--border-color);padding:18px;text-align:left;border-radius:6px;cursor:pointer;font-size:1.1rem;transition:all .2s;display:flex;align-items:flex-start;gap:10px;color:var(--text-color)}#options-container .option-btn{padding-right:50px}.option-label{font-weight:700;flex-shrink:0;min-width:1.5rem}.option-text{flex-grow:1}.options-grid.grid-2x2 .option-btn{justify-content:center;align-items:center;text-align:center}.options-grid.grid-2x2 .option-label{min-width:0}button.option-btn:hover:not(:disabled){border-color:var(--primary-color);background-color:var(--highlight-bg)}button.option-btn:disabled{cursor:default}button.option-btn small{display:block;font-size:1rem;color:var(--text-muted)}.split-container{display:flex;width:100%}.split-left{flex:1;border-top-right-radius:0!important;border-bottom-right-radius:0!important;border-right:2px solid var(--border-color)!important;margin-right:-2px;z-index:0}.split-left:hover{border-color:var(--primary-color)!important;z-index:2}.split-right{width:auto;border-top-left-radius:0!important;border-bottom-left-radius:0!important;padding:18px 25px!important;justify-content:center!important;align-items:center!important;flex-shrink:0;font-weight:700;border:2px solid var(--border-color)!important;z-index:1}.split-right:hover{filter:brightness(1.1);border-color:var(--primary-color)!important;z-index:2}.split-left.full-width{border-radius:6px!important;border-right-width:2px!important;margin-right:0!important;z-index:1}.option-btn.correct{background-color:var(--mastery-learning-low-bg)!important;border-color:var(--success-color)!important;color:var(--mastery-learning-low-text);position:relative;font-weight:600}.option-btn.correct:after{content:"✓";position:absolute;right:15px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:var(--success-color);text-shadow:0 0 2px white}.option-btn.incorrect{background-color:var(--error-alert-bg)!important;border:2px solid var(--error-color)!important;color:var(--error-alert-text);position:relative;opacity:.8}.option-btn.incorrect:after{content:"×";position:absolute;right:15px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:var(--error-color);text-shadow:0 0 2px white}@media(prefers-color-scheme:dark){.option-btn.correct:after,.option-btn.incorrect:after{text-shadow:0 0 2px black}}#loading{text-align:center}.stats-list{display:flex;flex-direction:column;gap:10px}.stat-item{background:var(--neutral-100);border:1px solid var(--border-color);padding:15px;border-radius:6px;display:flex;justify-content:space-between;align-items:center}.stat-item.good-day{border-left:5px solid var(--success-color);background-color:var(--success-light-bg)}.stat-item.bad-day{border-left:5px solid var(--error-color);background-color:var(--error-light-bg)}.legend-container{background-color:var(--neutral-200);border-radius:6px;padding:15px;margin-bottom:20px;font-size:1rem;line-height:1.5;border:1px solid var(--border-light)}.legend-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:12px}.legend-text{flex:1;line-height:1.4}.legend-item:last-child{margin-bottom:0}.algorithm-container{background-color:var(--feedback-bg);border-radius:6px;padding:15px;margin-bottom:20px;font-size:1rem;line-height:1.6;border-left:4px solid var(--primary-color)}.algorithm-container p{margin-top:0;margin-bottom:10px}.algorithm-container ul{margin:0 0 10px;padding-left:20px}.algorithm-container li{margin-bottom:5px}.algorithm-container p:last-child{margin-bottom:0}.progress-bar-container{background-color:var(--neutral-300);border-radius:4px;height:10px;width:100%;overflow:hidden;display:flex}.progress-bar-fill{height:100%;background-color:var(--success-color);transition:width .3s ease}.stat-item.column-layout{flex-direction:column;align-items:stretch;gap:5px}.section-header{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%}.section-title{flex-grow:1;min-width:0}.section-title strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.section-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}.stat-item.clickable{cursor:pointer;transition:background-color .2s}.stat-item.clickable:hover{background-color:var(--neutral-200)}.stat-details{display:none;margin-top:10px;padding-top:10px;border-top:1px dashed var(--border-dashed);font-size:1rem}.stat-details.expanded{display:block}.question-row{padding:5px 0;display:flex;justify-content:space-between;align-items:flex-start;gap:10px;border-bottom:1px solid var(--border-subtle)}.question-row.clickable{cursor:pointer;transition:background-color .2s}.question-row.clickable:hover{background-color:var(--highlight-bg)}.question-row:last-child{border-bottom:none}.empty-state{color:var(--neutral-500);font-style:italic;padding:10px 0;text-align:center}.mastery-dot{width:10px;height:10px;border-radius:50%;display:inline-block;flex-shrink:0;margin-top:6px}.glitter-particle{position:fixed;top:-5vh;pointer-events:none;z-index:9999;-webkit-user-select:none;user-select:none;animation:glitter-rain linear forwards}@keyframes glitter-rain{0%{transform:translateY(0) rotate(0);opacity:1}to{transform:translateY(110vh) rotate(360deg);opacity:0}}#topic-label{display:block;font-size:1rem;font-weight:600;text-align:center;color:var(--primary-color);margin:5px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 10px}@media(max-width:480px){.stats-bar{flex-wrap:wrap;justify-content:center;gap:10px}#topic-label{width:100%;order:3;font-size:1rem}}.topic-select{width:100%;padding:15px;margin-bottom:0;background-color:var(--neutral-100);border:2px solid var(--border-color);border-radius:6px;font-size:1.1rem;color:var(--text-color);cursor:pointer;min-height:50px}.topic-select:focus{border-color:var(--primary-color);outline:none}.practice-topic-btn{background-color:var(--primary-color);color:var(--on-primary-text);border:none;padding:8px 12px;border-radius:4px;font-size:1rem;cursor:pointer;transition:background-color .2s;min-height:44px;min-width:44px;display:flex;align-items:center;justify-content:center}.practice-topic-btn:hover{background-color:var(--primary-dark-color);transform:scale(1.1)}.explanation-box{background-color:var(--highlight-bg);border-left:4px solid var(--primary-color);padding:15px;margin-top:20px;border-radius:4px;font-size:1.1rem;line-height:1.6;color:var(--text-color);display:none}#next-btn-container{display:none}#next-btn{margin-top:20px;width:100%;padding:15px;background-color:var(--primary-color);color:var(--on-primary-text);border:3px solid transparent;border-radius:6px;font-size:1.2rem;cursor:pointer;display:none;min-height:50px}@media(max-width:480px){#next-btn-container{position:sticky;bottom:0;margin:0 -30px -30px;padding:20px 30px 30px;background-color:var(--card-color);box-shadow:0 -10px 15px -5px #0000001a;z-index:100}#next-btn{margin-top:0}}#timer-text{font-weight:700;color:var(--error-color)}#topic-label{font-style:italic}#question-image{max-width:100%;height:auto;border-radius:4px;margin-bottom:20px}#insights-stats{margin-bottom:20px}#results-container{text-align:center}.flex-between{display:flex;justify-content:space-between;width:100%}.insights-header{font-size:1.1rem;font-weight:700;margin-bottom:10px;color:var(--primary-color)}.insight-item{display:flex;align-items:center;gap:10px}.insight-item.mb-8{margin-bottom:8px}.insight-icon{font-size:1.5rem}.insight-subtitle{color:var(--text-muted)}.forecast-details{font-size:1rem;color:var(--text-muted)}.section-stats-text{font-size:1rem;text-align:right;margin-top:2px}.question-text-span{flex-grow:1}.m-text-success{color:var(--success-color);font-weight:700}.m-text-mastered{color:var(--mastery-mastered-high-text);font-weight:700}.m-text-learning{color:var(--mastery-learning-high-text)}.m-text-review{color:var(--mastery-incorrect-text)}.text-muted{color:var(--text-muted-light)}.flashcard-container{perspective:1000px;width:100%;height:280px;margin-bottom:20px;cursor:pointer;max-width:70%;margin-left:auto;margin-right:auto}.flashcard-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s;transform-style:preserve-3d;box-shadow:0 4px 8px #0000001a;border-radius:8px}.no-transition{transition:none!important}.flashcard-container.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;background-color:var(--card-color);border:1px solid var(--border-color);overflow-y:auto}.flashcard-front{color:var(--text-color)}.flashcard-back{color:var(--text-color);transform:rotateY(180deg);border:2px solid var(--primary-color)}.flashcard-back-content{font-size:1.2rem;font-weight:700}.flashcard-hint{text-align:center;font-size:.8rem;color:var(--text-muted);margin-top:10px}#flashcard-front-content img{max-width:100%;max-height:150px;margin-top:10px;border-radius:4px}#flashcard-back-content{font-size:1.3rem;font-weight:700;color:var(--primary-color)}