:root{--color-white: #ffffff;--color-gray-50: #f8f8f8;--color-gray-100: #f5f5f5;--color-gray-200: #e8e8e8;--color-gray-300: #d0d0d0;--color-gray-400: #b0b0b0;--color-gray-500: #808080;--color-gray-600: #505050;--color-gray-700: #333333;--color-gray-800: #2a2a2a;--color-gray-900: #1a1a1a;--color-success: #4caf50;--color-success-light: #e8f5e9;--color-success-dark: #2e7d32;--color-error: #d32f2f;--color-error-light: #ffebee;--color-error-dark: #c62828;--color-warning: #ffa500;--color-warning-light: #fff3e0;--color-warning-dark: #e65100;--color-info: #2196f3;--color-info-light: #e3f2fd;--color-info-dark: #1565c0;--color-belt-white: #f0f0f0;--color-belt-yellow: #ffc400;--color-belt-orange: #ff8c00;--color-belt-green: #4caf50;--color-belt-blue: #2196f3;--color-belt-brown: #8b6914;--color-belt-black: #1a1a1a;--color-primary: #646cff;--color-primary-light: #f0f4ff;--color-primary-dark: #535bf2;--color-surface-bg: #ffffff;--color-surface-raised: #ffffff;--color-surface-overlay: rgba(0, 0, 0, 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var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface-raised);font-size:var(--font-size-sm);color:var(--color-text-primary);transition:all var(--motion-normal);margin-bottom:var(--spacing-md)}.back-button:hover{background-color:var(--color-gray-100);border-color:var(--color-text-secondary)}.item-card{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--spacing-lg);background-color:var(--color-surface-raised);color:var(--color-text-primary);transition:all var(--motion-normal);box-shadow:var(--shadow-sm)}.item-card-content{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-md)}.item-card-text h3{margin-top:0;margin-bottom:var(--spacing-sm);font-size:var(--font-size-lg);color:var(--color-text-primary)}.item-card-text p{margin:0 0 var(--spacing-sm) 0;color:var(--color-text-secondary)}.item-card-type{background-color:var(--color-gray-200);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-full);font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-left:var(--spacing-md)}.item-card-description{color:var(--color-text-secondary);margin-bottom:var(--spacing-md);font-size:var(--font-size-base)}.item-card-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);margin-bottom:var(--spacing-md)}.item-card-tag{background-color:var(--color-info-light);color:var(--color-info-dark);padding:2px var(--spacing-sm);border-radius:var(--radius-full);font-size:var(--font-size-xs);transition:all var(--motion-normal)}.item-card-tag:hover{background-color:var(--color-info);color:#fff}.item-card-difficulty{color:var(--color-belt-orange);font-size:var(--font-size-lg)}.practice-item-card{background-color:var(--color-surface-raised);border-radius:var(--radius-lg);padding:var(--spacing-2xl);box-shadow:var(--shadow-md);max-width:600px;margin:0 auto;color:var(--color-text-primary)}.practice-item-card-header{text-align:center;margin-bottom:var(--spacing-2xl)}.practice-item-card-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--spacing-md)}.practice-item-card-jp{font-size:32px;font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-lg);color:var(--color-text-primary)}.practice-item-card-answer{font-size:var(--font-size-2xl);text-align:center;margin-bottom:var(--spacing-2xl);color:var(--color-text-primary)}.practice-item-card-alternative{font-size:var(--font-size-base);text-align:center;margin-bottom:var(--spacing-2xl);color:var(--color-text-secondary)}.error-message{padding:var(--spacing-lg);background-color:var(--color-error-light);border:1px solid #ffcccc;border-radius:var(--radius-md);color:var(--color-error-dark);text-align:center}.exercise-start{display:flex;flex-direction:column;gap:var(--spacing-2xl);margin-top:var(--spacing-lg)}.lesson-info{text-align:center;padding:var(--spacing-lg);background-color:var(--color-gray-100);border-radius:var(--radius-md)}.direction-selector{padding:var(--spacing-lg);border:1px solid var(--color-border);border-radius:var(--radius-md)}.radio-group{display:flex;flex-direction:column;gap:var(--spacing-lg);margin-top:var(--spacing-lg)}.radio-label{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);border:2px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all var(--motion-normal);background-color:var(--color-surface-raised)}.radio-label:hover{background-color:var(--color-gray-100);border-color:var(--color-primary)}.radio-label input[type=radio]:checked+span{font-weight:var(--font-weight-bold);color:var(--color-primary)}.radio-label input[type=radio]{cursor:pointer}.button{padding:var(--spacing-md) var(--spacing-lg);cursor:pointer;border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface-raised);font-size:var(--font-size-base);color:var(--color-text-primary);transition:all var(--motion-normal)}.button:hover{background-color:var(--color-gray-100);border-color:var(--color-primary)}.button:disabled{opacity:.5;cursor:not-allowed}.button-primary{background-color:var(--color-primary);color:#fff;border:none;font-weight:var(--font-weight-bold)}.button-primary:hover:not(:disabled){background-color:var(--color-primary-dark);box-shadow:var(--shadow-md);transform:translateY(-1px)}.exercise-header{text-align:center;margin-bottom:var(--spacing-lg)}.direction-label{color:var(--color-text-secondary);font-size:var(--font-size-sm);margin-top:var(--spacing-sm)}.progress-bar-container{margin:var(--spacing-lg) 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var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface-raised);cursor:pointer;font-size:var(--font-size-lg);text-align:left;transition:all var(--motion-normal);color:var(--color-text-primary)}.answer-option.selected{border-color:var(--color-primary);background-color:var(--color-primary-light);color:var(--color-primary-dark)}.answer-option.correct{border-color:var(--color-success);background-color:var(--color-success-light);color:var(--color-success-dark)}.answer-option.incorrect{border-color:var(--color-error);background-color:var(--color-error-light);color:var(--color-error-dark)}.answer-option:disabled{cursor:not-allowed}.feedback{margin-top:var(--spacing-lg);padding:var(--spacing-lg);border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:var(--font-weight-bold);text-align:center;animation:slideIn var(--motion-normal) ease-out}.feedback.correct{background-color:var(--color-success-light);color:var(--color-success-dark)}.feedback.incorrect{background-color:var(--color-error-light);color:var(--color-error-dark)}.exercise-actions{display:flex;justify-content:center;margin-top:var(--spacing-2xl);gap:var(--spacing-md)}.exercise-summary{display:flex;flex-direction:column;gap:var(--spacing-2xl);align-items:center;padding:var(--spacing-2xl) var(--spacing-lg)}.summary-card{width:100%;max-width:500px;background-color:var(--color-surface-raised);padding:var(--spacing-2xl);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);text-align:center}.summary-stats{display:flex;justify-content:space-around;margin:var(--spacing-2xl) 0}.stat-item{display:flex;flex-direction:column;gap:var(--spacing-sm)}.stat-value{font-size:36px;font-weight:var(--font-weight-bold);color:var(--color-primary)}.stat-label{font-size:var(--font-size-sm);color:var(--color-text-secondary);text-transform:uppercase;letter-spacing:.05em}.score-message{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);padding:var(--spacing-lg);border-radius:var(--radius-md);margin-top:var(--spacing-lg);animation:slideIn var(--motion-slow) ease-out}.score-message.excellent{background-color:var(--color-success-light);color:var(--color-success-dark)}.score-message.good{background-color:var(--color-warning-light);color:var(--color-warning-dark)}.score-message.needs-practice{background-color:var(--color-error-light);color:var(--color-error-dark)}.summary-actions{display:flex;gap:var(--spacing-md);flex-wrap:wrap;justify-content:center}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.matching-exercise{max-width:900px;margin:0 auto;padding:var(--spacing-lg)}.matching-instructions{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-2xl)}.matching-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-xl);margin:var(--spacing-2xl) 0}.matching-column{display:flex;flex-direction:column;gap:var(--spacing-md)}.matching-column h3{text-align:center;margin-bottom:var(--spacing-md);color:var(--color-text-primary)}.matching-item{padding:var(--spacing-lg);background-color:var(--color-surface-raised);border:2px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all var(--motion-normal);display:flex;justify-content:space-between;align-items:center;min-height:60px;color:var(--color-text-primary)}.matching-item:hover:not(.matched){border-color:var(--color-primary);transform:translate(5px);box-shadow:var(--shadow-md)}.matching-item.selected{border-color:var(--color-primary);background-color:var(--color-primary-light);box-shadow:var(--shadow-md)}.matching-item.matched{border-color:var(--color-success);background-color:var(--color-success-light);cursor:default;color:var(--color-success-dark)}.matching-item.clickable{cursor:pointer}.matching-item-image{display:flex;gap:var(--spacing-md);align-items:center}.matching-item-image img{width:40px;height:40px;object-fit:cover;border-radius:var(--radius-sm)}.check-mark{color:var(--color-success);font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold)}.matching-actions{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md);margin-top:var(--spacing-2xl)}.matching-progress{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin:0}.typing-exercise{max-width:600px;margin:0 auto;padding:var(--spacing-lg)}.typing-input{width:100%;padding:var(--spacing-lg);font-size:var(--font-size-lg);border:2px solid var(--color-border);border-radius:var(--radius-md);margin:var(--spacing-lg) 0;transition:all var(--motion-normal);background-color:var(--color-surface-raised);color:var(--color-text-primary);font-family:inherit}.typing-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.typing-input:disabled{background-color:var(--color-gray-200);cursor:not-allowed;opacity:.6}.feedback-warning{background-color:var(--color-warning-light);color:var(--color-warning-dark)}.feedback-error{background-color:var(--color-error-light);color:var(--color-error-dark)}.feedback-success{background-color:var(--color-success-light);color:var(--color-success-dark)}.hint{font-size:var(--font-size-sm);margin-top:var(--spacing-md);font-style:italic;color:var(--color-text-secondary)}.correct-answer{font-size:var(--font-size-base);margin-top:var(--spacing-md);font-weight:var(--font-weight-bold);color:var(--color-success-dark)}.typing-hints{margin-top:var(--spacing-lg);text-align:center}.hint-text{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-style:italic}.ordering-exercise{max-width:700px;margin:0 auto;padding:var(--spacing-lg)}.ordering-instructions{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-2xl)}.ordering-list{display:flex;flex-direction:column;gap:var(--spacing-md);margin:var(--spacing-2xl) 0}.ordering-item{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-lg);background-color:var(--color-surface-raised);border:2px solid var(--color-border);border-radius:var(--radius-md);cursor:move;transition:all var(--motion-normal);color:var(--color-text-primary)}.ordering-item:hover{border-color:var(--color-primary);transform:translate(5px);box-shadow:var(--shadow-md)}.ordering-item.misplaced{border-color:var(--color-error);background-color:var(--color-error-light);color:var(--color-error-dark)}.ordering-item.correct{border-color:var(--color-success);background-color:var(--color-success-light);color:var(--color-success-dark)}.ordering-item-number{min-width:40px;height:40px;display:flex;align-items:center;justify-content:center;background-color:var(--color-primary);color:#fff;border-radius:50%;font-weight:var(--font-weight-bold);font-size:var(--font-size-lg);flex-shrink:0}.ordering-item.correct .ordering-item-number{background-color:var(--color-success)}.ordering-item-text{flex:1;font-size:var(--font-size-base);color:var(--color-text-primary)}.ordering-item-controls{display:flex;gap:var(--spacing-sm)}.ordering-button{width:36px;height:36px;border:1px solid var(--color-border);border-radius:var(--radius-md);background-color:var(--color-surface-raised);cursor:pointer;font-size:var(--font-size-base);transition:all var(--motion-normal);color:var(--color-text-primary)}.ordering-button:hover:not(:disabled){background-color:var(--color-primary-light);border-color:var(--color-primary);color:var(--color-primary)}.ordering-button:disabled{opacity:.3;cursor:not-allowed}.ordering-actions{display:flex;justify-content:center;margin-top:var(--spacing-2xl)}.correct-order-hint{margin-top:var(--spacing-lg);padding:var(--spacing-lg);background-color:var(--color-gray-100);border-radius:var(--radius-md);border-left:4px solid var(--color-primary)}.correct-order-hint ol{text-align:left;margin:var(--spacing-md) 0 0 var(--spacing-lg);color:var(--color-text-primary)}.correct-order-hint li{margin:var(--spacing-sm) 0}.exercise-type-selector{margin:var(--spacing-2xl) 0}.exercise-type-selector 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var(--color-primary))}.section-card-description{margin:0;font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:var(--line-height-normal)}.section-card-progress{margin-top:var(--spacing-md);padding-top:var(--spacing-md);border-top:1px solid var(--color-border)}.section-progress-bar{height:8px;background-color:var(--color-gray-300);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:var(--spacing-sm)}.section-progress-fill{height:100%;background-color:var(--accent-color, var(--color-primary));transition:width var(--motion-normal) ease-out;border-radius:var(--radius-lg)}.section-progress-text{font-size:var(--font-size-sm);color:var(--color-text-secondary);display:flex;justify-content:space-between;align-items:center}.section-progress-text strong{color:var(--color-text-primary)}.section-card.completed{border-color:var(--color-success);background-color:var(--color-success-light)}.section-card.completed .section-card-title{color:var(--color-success-dark)}.section-card.completed:before{background-color:var(--color-success);width:100%;opacity:.2}.section-card.locked{opacity:.6;cursor:not-allowed;border-style:dashed}.section-card.locked:hover{box-shadow:var(--shadow-sm);transform:none;border-color:var(--color-border)}.section-card.locked:before{width:4px}.section-card.in-progress:before{background-color:var(--color-warning)}.section-card-status{position:absolute;top:var(--spacing-md);right:var(--spacing-md);background-color:var(--accent-color, var(--color-primary));color:#fff;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-full);font-size:var(--font-size-xs);font-weight:var(--font-weight-bold);text-transform:uppercase;letter-spacing:.05em}.section-card.completed .section-card-status{background-color:var(--color-success);content:"✓ Complete"}.section-card.locked .section-card-status{background-color:var(--color-gray-400);content:"Locked"}@media(prefers-color-scheme:dark){.section-card{background-color:var(--color-surface-raised);border-color:var(--color-border)}.section-card:hover{border-color:var(--accent-color, var(--color-primary))}.section-card.completed{background-color:var(--color-success-light)}}@media(max-width:768px){.section-card{padding:var(--spacing-md)}.section-card-title{font-size:var(--font-size-xl)}.section-card-description{font-size:var(--font-size-sm)}.section-card-status{top:var(--spacing-sm);right:var(--spacing-sm);font-size:var(--font-size-xs)}}.section-cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--spacing-lg);margin:var(--spacing-lg) 0}@media(max-width:768px){.section-cards-grid{grid-template-columns:1fr;gap:var(--spacing-md)}}.section-card:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.section-card[role=button]:focus-visible{outline:3px solid var(--color-primary)}.streak-badge{display:flex;flex-direction:column;align-items:center;padding:var(--spacing-xl);background-color:var(--color-surface);border-radius:var(--radius-lg);border:3px solid var(--streak-color, var(--color-gray-400));box-shadow:var(--shadow-md);transition:transform var(--motion-normal),box-shadow var(--motion-normal);animation:scaleIn var(--motion-normal) ease-out}.streak-badge:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.streak-emoji{font-size:48px;margin-bottom:var(--spacing-md);animation:float 3s ease-in-out infinite;-webkit-user-select:none;user-select:none}.streak-number{font-size:var(--font-size-5xl);font-weight:var(--font-weight-bold);color:var(--streak-color, var(--color-gray-600));margin-bottom:var(--spacing-xs);line-height:1;animation:popIn var(--motion-normal) ease-out}.streak-label{font-size:var(--font-size-lg);color:var(--color-gray-600);margin-bottom:var(--spacing-md);font-weight:var(--font-weight-semibold);text-transform:uppercase;letter-spacing:1px}.streak-best{font-size:var(--font-size-sm);color:var(--color-gray-500);text-align:center;padding:var(--spacing-xs) var(--spacing-sm);background-color:var(--color-gray-50);border-radius:var(--radius-sm);margin-top:var(--spacing-xs)}.streak-best:before{content:"🏆 ";opacity:.8}.streak-message{font-size:var(--font-size-sm);color:var(--color-gray-500);text-align:center;margin-top:var(--spacing-md);font-style:italic;max-width:240px}.streak-message.encourage{color:var(--color-primary);font-weight:var(--font-weight-semibold)}.streak-badge.streak-0{--streak-color: var(--color-gray-400);border-style:dashed}.streak-badge.streak-3{--streak-color: var(--color-success)}.streak-badge.streak-7{--streak-color: #ffd700}.streak-badge.streak-7 .streak-emoji{animation:float 3s ease-in-out infinite,pulse 2s ease-in-out infinite}.streak-badge.streak-14{--streak-color: var(--color-warning)}.streak-badge.streak-14 .streak-emoji{animation:float 3s ease-in-out infinite,pulse 2s ease-in-out infinite}.streak-badge.streak-30{--streak-color: #ff6b6b;box-shadow:0 0 20px #ff6b6b4d}.streak-badge.streak-30 .streak-emoji{animation:float 3s ease-in-out infinite,pulse 1.5s ease-in-out infinite}.streak-badge.streak-30:hover{box-shadow:0 0 30px #ff6b6b80,var(--shadow-xl)}.streak-badge.milestone{animation:scaleIn var(--motion-normal) ease-out,shimmer 2s ease-in-out}.streak-badge.milestone:after{content:"✨";position:absolute;top:-10px;right:-10px;font-size:24px;animation:rotate360 2s linear infinite}@media(prefers-color-scheme:dark){.streak-badge{background-color:var(--color-surface-dark)}.streak-label{color:var(--color-gray-400)}.streak-best{background-color:var(--color-gray-800);color:var(--color-gray-400)}.streak-message{color:var(--color-gray-400)}.streak-message.encourage{color:var(--color-primary-light)}.streak-badge.streak-0{--streak-color: var(--color-gray-600)}}@media(max-width:768px){.streak-badge{padding:var(--spacing-lg)}.streak-emoji{font-size:40px}.streak-number{font-size:var(--font-size-4xl)}.streak-label{font-size:var(--font-size-base)}}@media(max-width:480px){.streak-badge{padding:var(--spacing-md)}.streak-emoji{font-size:32px}.streak-number{font-size:var(--font-size-3xl)}}.session-summary{background-color:var(--color-surface);border-radius:var(--radius-lg);padding:var(--spacing-2xl);box-shadow:var(--shadow-lg);max-width:600px;margin:0 auto;text-align:center;animation:scaleIn var(--motion-normal) ease-out}.session-summary-emoji{font-size:48px;margin-bottom:var(--spacing-lg);animation:popIn var(--motion-normal) ease-out;-webkit-user-select:none;user-select:none}.session-summary-heading{margin-bottom:var(--spacing-xl);font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);color:var(--color-gray-900)}.session-summary-score{margin-bottom:var(--spacing-xl)}.session-summary-score-number{font-size:48px;font-weight:var(--font-weight-bold);color:var(--color-success);margin-bottom:var(--spacing-sm);animation:fadeIn var(--motion-normal) ease-out}.session-summary-score-label{font-size:var(--font-size-lg);color:var(--color-gray-600)}.session-summary-stats{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.session-summary-stat{background-color:var(--color-gray-50);padding:var(--spacing-lg);border-radius:var(--radius-md);transition:transform var(--motion-fast),box-shadow var(--motion-fast)}.session-summary-stat:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.session-summary-stat-number{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-xs)}.session-summary-stat-number.reviewed{color:var(--color-primary)}.session-summary-stat-number.new{color:var(--color-info)}.session-summary-stat-label{font-size:var(--font-size-sm);color:var(--color-gray-600);text-transform:uppercase;letter-spacing:.5px}.session-summary-actions{display:flex;flex-direction:column;gap:var(--spacing-sm)}.session-summary-actions .btn{width:100%;justify-content:center}.session-summary-message{margin-top:var(--spacing-lg);padding:var(--spacing-md);background-color:var(--color-primary-light);color:var(--color-primary);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold)}@media(prefers-color-scheme:dark){.session-summary{background-color:var(--color-surface-dark)}.session-summary-heading{color:var(--color-gray-100)}.session-summary-stat{background-color:var(--color-gray-800)}.session-summary-stat-label,.session-summary-score-label{color:var(--color-gray-400)}.session-summary-message{background-color:var(--color-primary);color:var(--color-white)}}@media(max-width:768px){.session-summary{padding:var(--spacing-xl)}.session-summary-emoji{font-size:40px}.session-summary-heading{font-size:var(--font-size-2xl)}.session-summary-score-number{font-size:40px}.session-summary-stats{gap:var(--spacing-md)}.session-summary-stat{padding:var(--spacing-md)}.session-summary-stat-number{font-size:var(--font-size-2xl)}}@media(max-width:480px){.session-summary{padding:var(--spacing-lg)}.session-summary-stats{grid-template-columns:1fr;gap:var(--spacing-sm)}.session-summary-actions{gap:var(--spacing-xs)}}.milestone-overlay{position:fixed;inset:0;background-color:#000000b3;display:flex;align-items:center;justify-content:center;z-index:9999;animation:fadeIn 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var(--spacing-xl);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);background-color:var(--color-success);color:var(--color-white);border:none;border-radius:var(--radius-md);cursor:pointer;transition:transform var(--motion-fast),background-color var(--motion-fast);animation:slideInUp var(--motion-normal) ease-out .2s;animation-fill-mode:both}.milestone-dismiss:hover{transform:translateY(-2px);background-color:var(--color-success-dark)}.milestone-dismiss:active{transform:translateY(0)}.milestone-content.streak{border:3px solid #ff6b6b}.milestone-content.streak .milestone-title{color:#ff6b6b}.milestone-content.streak-7{border:3px solid #ffd700}.milestone-content.streak-7 .milestone-title{color:gold}.milestone-content.streak-30{border:3px solid #ff6b6b;box-shadow:0 0 30px #ff6b6b66,var(--shadow-xl)}.milestone-content.streak-30 .milestone-title{color:#ff6b6b;text-shadow:0 0 10px rgba(255,107,107,.3)}.milestone-content.streak-100{border:3px solid #ff6b6b;box-shadow:0 0 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infinite}@media(prefers-color-scheme:dark){.milestone-overlay{background-color:#000000d9}.milestone-content{background-color:var(--color-surface-dark)}.milestone-title{color:var(--color-gray-100)}.milestone-message{color:var(--color-gray-400)}}@media(max-width:768px){.milestone-content{padding:var(--spacing-xl);max-width:90%}.milestone-emoji{font-size:56px}.milestone-title{font-size:var(--font-size-2xl)}.milestone-message{font-size:var(--font-size-base)}}@media(max-width:480px){.milestone-content{padding:var(--spacing-lg)}.milestone-emoji{font-size:48px}.milestone-title{font-size:var(--font-size-xl)}}@media(prefers-reduced-motion:reduce){.milestone-emoji{animation:none}.milestone-content:before,.milestone-content:after{animation:none}}.star-display{display:inline-flex;gap:.25rem;align-items:center}.star-icon{width:1.25rem;height:1.25rem;transition:transform .2s 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