.lang-switcher{position:relative}.lang-trigger{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);background:var(--bg-secondary);border-radius:8px;font-size:.875rem;color:var(--text-secondary);transition:var(--transition-fast)}.lang-trigger:hover{background:var(--border-light)}.lang-name{display:none}@media (min-width: 480px){.lang-name{display:inline}}.lang-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--bg-card);border:1px solid var(--border-light);border-radius:12px;box-shadow:var(--shadow-soft);min-width:140px;overflow:hidden;animation:fadeIn .2s ease;z-index:1000}.lang-option{display:flex;align-items:center;gap:var(--space-sm);width:100%;padding:var(--space-sm) var(--space-md);font-size:.875rem;color:var(--text-secondary);transition:var(--transition-fast)}.lang-option:hover{background:var(--bg-secondary)}.lang-option.active{background:var(--accent-gentle);color:var(--text-primary)}.header{background:var(--bg-card);border-bottom:1px solid var(--border-light);position:sticky;top:0;z-index:100}.header-content{max-width:800px;margin:0 auto;padding:var(--space-md) var(--space-lg);display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:var(--space-sm)}.logo-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;color:#fff}.logo-text{font-family:var(--font-display);font-size:1.75rem;font-weight:600;color:var(--text-primary)}.header-actions{display:flex;align-items:center;gap:var(--space-md)}.progress-card{display:flex;align-items:center;justify-content:center;gap:var(--space-lg);padding:var(--space-lg);background:linear-gradient(135deg,var(--accent-gentle) 0%,var(--bg-secondary) 100%);border-radius:16px;margin-bottom:var(--space-xl)}.progress-stat{display:flex;flex-direction:column;align-items:center;gap:var(--space-xs)}.progress-value{font-size:1.75rem;font-weight:700;color:var(--text-primary)}.progress-value.streak{font-size:1.5rem}.progress-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.progress-divider{width:1px;height:40px;background:var(--border-light)}@media (max-width: 480px){.progress-card{gap:var(--space-md);padding:var(--space-md)}.progress-value{font-size:1.25rem}.progress-label{font-size:.625rem}}.task-input-form{display:flex;flex-direction:column;gap:var(--space-md);margin-bottom:var(--space-xl)}.input-wrapper{position:relative}.task-input{width:100%;padding:var(--space-md) var(--space-lg);font-size:1rem;background:var(--bg-card);border:2px solid var(--border-light);border-radius:12px;transition:var(--transition-fast)}.task-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 4px #ff8c691a}.task-input::placeholder{color:var(--text-muted)}.input-actions{display:flex;gap:var(--space-sm)}.btn{padding:var(--space-sm) var(--space-lg);font-size:.875rem;font-weight:600;border-radius:8px;transition:var(--transition-fast);white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #ff8c694d}.btn-secondary{background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-light)}.btn-secondary:hover:not(:disabled){background:var(--accent-gentle);color:var(--text-primary)}@media (max-width: 480px){.input-actions{flex-direction:column}.btn{width:100%}}.task-item{display:flex;align-items:flex-start;gap:var(--space-md);padding:var(--space-md);background:var(--bg-card);border:1px solid var(--border-light);border-radius:12px;transition:var(--transition-normal);animation:fadeIn .3s ease}.task-item:hover{box-shadow:var(--shadow-card);transform:translateY(-1px)}.task-item.completed{opacity:.7;background:var(--bg-secondary)}.task-item.completed .task-title{text-decoration:line-through;color:var(--text-muted)}.task-item.deleting{animation:fadeOut .3s ease forwards}@keyframes fadeOut{to{opacity:0;transform:translate(20px)}}.task-checkbox{width:28px;height:28px;min-width:28px;border:2px solid var(--border-light);border-radius:8px;display:flex;align-items:center;justify-content:center;transition:var(--transition-fast);background:transparent}.task-checkbox:hover{border-color:var(--accent-success);background:var(--accent-gentle)}.task-item.completed .task-checkbox{background:var(--accent-success);border-color:var(--accent-success)}.checkmark{color:#fff;font-weight:700;animation:pop .3s ease}.task-content{flex:1;min-width:0}.task-title{font-size:1rem;font-weight:500;color:var(--text-primary);word-wrap:break-word}.task-description{font-size:.875rem;color:var(--text-secondary);margin-top:var(--space-xs)}.task-delete{opacity:0;width:28px;height:28px;font-size:1.25rem;color:var(--text-muted);border-radius:8px;transition:var(--transition-fast)}.task-item:hover .task-delete{opacity:1}.task-delete:hover{background:#fee;color:#e74c3c}.task-list{display:flex;flex-direction:column;gap:var(--space-xl)}.task-section{display:flex;flex-direction:column;gap:var(--space-md)}.section-title{font-family:var(--font-display);font-size:1.25rem;color:var(--text-secondary);padding-left:var(--space-sm)}.section-title.completed{opacity:.6}.task-items{display:flex;flex-direction:column;gap:var(--space-sm)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-2xl);text-align:center}.empty-icon{font-size:3rem;margin-bottom:var(--space-md);animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.empty-text{font-size:1.125rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-xs)}.empty-hint{font-size:.875rem;color:var(--text-secondary)}.buddy-toggle{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;font-size:1.5rem;box-shadow:0 4px 20px #ff8c6966;transition:var(--transition-normal);z-index:1000}.buddy-toggle:hover{transform:scale(1.1)}.buddy-toggle.open{font-size:1.75rem}.buddy-panel{position:fixed;bottom:96px;right:24px;width:340px;max-height:480px;background:var(--bg-card);border-radius:20px;box-shadow:0 8px 40px #00000026;display:flex;flex-direction:column;overflow:hidden;animation:slideUp .3s ease;z-index:999}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.buddy-header{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md);background:linear-gradient(135deg,var(--accent-gentle),var(--bg-secondary));border-bottom:1px solid var(--border-light)}.buddy-avatar{font-size:1.5rem}.buddy-name{font-weight:600;color:var(--text-primary)}.buddy-messages{flex:1;overflow-y:auto;padding:var(--space-md);display:flex;flex-direction:column;gap:var(--space-sm);max-height:320px}.buddy-message{max-width:85%;padding:var(--space-sm) var(--space-md);border-radius:16px;font-size:.875rem;line-height:1.5}.buddy-message.user{align-self:flex-end;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border-bottom-right-radius:4px}.buddy-message.ai{align-self:flex-start;background:var(--bg-secondary);color:var(--text-primary);border-bottom-left-radius:4px}.buddy-message.typing{display:flex;gap:4px;padding:var(--space-md)}.dot{width:8px;height:8px;background:var(--text-muted);border-radius:50%;animation:bounce 1.4s infinite}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}@keyframes bounce{0%,60%,to{transform:translateY(0)}30%{transform:translateY(-8px)}}.buddy-input-area{display:flex;gap:var(--space-sm);padding:var(--space-md);border-top:1px solid var(--border-light)}.buddy-input{flex:1;padding:var(--space-sm) var(--space-md);background:var(--bg-secondary);border-radius:20px;font-size:.875rem}.buddy-send{width:36px;height:36px;border-radius:50%;background:var(--accent-primary);color:#fff;font-size:1rem;transition:var(--transition-fast)}.buddy-send:hover:not(:disabled){background:var(--accent-secondary)}.buddy-send:disabled{opacity:.5}@media (max-width: 480px){.buddy-panel{right:12px;left:12px;width:auto;bottom:80px}.buddy-toggle{right:16px;bottom:16px}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;padding:var(--space-md);z-index:2000;animation:fadeIn .2s ease}.modal-content{position:relative;width:100%;max-width:480px;max-height:90vh;overflow-y:auto;background:var(--bg-card);border-radius:20px;padding:var(--space-xl);animation:slideUp .3s ease}.modal-close{position:absolute;top:var(--space-md);right:var(--space-md);width:32px;height:32px;font-size:1.25rem;color:var(--text-muted);border-radius:8px;transition:var(--transition-fast)}.modal-close:hover{background:var(--bg-secondary);color:var(--text-primary)}.modal-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-lg)}.modal-icon{font-size:1.5rem}.modal-title{font-family:var(--font-display);font-size:1.5rem;color:var(--text-primary)}.label{display:block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:var(--space-xs)}.original-task{padding:var(--space-md);background:var(--bg-secondary);border-radius:12px;margin-bottom:var(--space-lg)}.original-task p{font-weight:500;color:var(--text-primary)}.subtasks-list{margin-bottom:var(--space-lg)}.subtask-item{display:flex;align-items:flex-start;gap:var(--space-md);padding:var(--space-md);background:var(--bg-card);border:1px solid var(--border-light);border-radius:10px;margin-top:var(--space-sm);animation:fadeIn .3s ease;animation-fill-mode:both}.subtask-item:nth-child(2){animation-delay:.1s}.subtask-item:nth-child(3){animation-delay:.2s}.subtask-item:nth-child(4){animation-delay:.3s}.subtask-item:nth-child(5){animation-delay:.4s}.subtask-item:nth-child(6){animation-delay:.5s}.subtask-number{width:24px;height:24px;min-width:24px;background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700}.subtask-text{color:var(--text-primary);font-size:.9375rem}.encouragement{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md);background:linear-gradient(135deg,var(--accent-gentle),var(--bg-secondary));border-radius:12px;margin-bottom:var(--space-lg)}.encouragement-icon{font-size:1.5rem}.encouragement p{font-style:italic;color:var(--text-secondary)}.modal-actions{display:flex;gap:var(--space-md);justify-content:flex-end}@media (max-width: 480px){.modal-actions{flex-direction:column-reverse}.modal-actions .btn{width:100%}}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;max-width:640px;margin:0 auto;padding:var(--space-xl) var(--space-lg);width:100%}.hero{text-align:center;margin-bottom:var(--space-xl)}.hero-title{font-family:var(--font-display);font-size:2rem;font-weight:600;color:var(--text-primary);margin-bottom:var(--space-sm)}.hero-subtitle{font-size:1rem;color:var(--text-secondary)}@media (max-width: 480px){.main-content{padding:var(--space-md)}.hero-title{font-size:1.5rem}}:root{--bg-primary: #FFF9F5;--bg-secondary: #FFF3EB;--bg-card: #FFFFFF;--text-primary: #2D3436;--text-secondary: #636E72;--text-muted: #B2BEC3;--accent-primary: #FF8C69;--accent-secondary: #FFB347;--accent-success: #88D498;--accent-gentle: #B8E0D2;--border-light: #F0E6DF;--shadow-soft: 0 4px 20px rgba(255, 140, 105, .1);--shadow-card: 0 2px 12px rgba(0, 0, 0, .04);--font-display: "Caveat", cursive;--font-body: "Nunito", sans-serif;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh}:lang(zh),:lang(ja),:lang(ko){font-family:var(--font-body),"Noto Sans SC","Noto Sans JP","Noto Sans KR",sans-serif}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit;border:none;outline:none}a{color:inherit;text-decoration:none}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pop{0%{transform:scale(1)}50%{transform:scale(1.1)}to{transform:scale(1)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes celebrate{0%{transform:scale(1) rotate(0)}25%{transform:scale(1.1) rotate(-5deg)}50%{transform:scale(1.2) rotate(5deg)}75%{transform:scale(1.1) rotate(-5deg)}to{transform:scale(1) rotate(0)}}