:root{--font-primary: "Lexend", "Poppins", sans-serif;--primary-hue: 265;--secondary-hue: 165;--accent-hue: 335;--danger-hue: 0;--base-hue: 220;--border-radius-small: 6px;--border-radius-medium: 12px;--border-radius-large: 18px;--transition-fast: .2s ease;--shadow-color-hsl: var(--primary-hue), 30%, 60%;--bg-color-light: hsl(var(--base-hue), 40%, 98%);--card-bg-light: white;--modal-bg-light: white;--text-color-light: hsl(var(--base-hue), 30%, 15%);--text-light-light: hsl(var(--base-hue), 15%, 50%);--primary-color-light: hsl(var(--primary-hue), 65%, 65%);--primary-color-darker-light: hsl(var(--primary-hue), 60%, 55%);--secondary-color-light: hsl(var(--secondary-hue), 55%, 60%);--accent-color-light: hsl(var(--accent-hue), 80%, 70%);--danger-color-light: hsl(var(--danger-hue), 70%, 60%);--border-color-light: hsl(var(--base-hue), 25%, 88%);--shadow-light: .1;--shadow-medium: .12;--shadow-large: .15;--due-color-light: #e67e22;--new-color-light: #3498db;--learning-color-light: #f1c40f;--mastered-color-light: #27ae60;--button-bg-light: hsl(var(--base-hue), 30%, 95%);--button-bg-hover-light: hsl(var(--base-hue), 35%, 90%);--button-text-light: hsl(var(--base-hue), 25%, 35%);--scrollbar-track-light: hsl(var(--base-hue), 20%, 94%);--scrollbar-thumb-light: hsl(var(--base-hue), 20%, 78%);--scrollbar-thumb-hover-light: hsl(var(--base-hue), 25%, 70%);--bg-color-dark: hsl(var(--base-hue), 10%, 12%);--card-bg-dark: hsl(var(--base-hue), 10%, 18%);--modal-bg-dark: hsl(var(--base-hue), 10%, 20%);--text-color-dark: hsl(var(--base-hue), 15%, 90%);--text-light-dark: hsl(var(--base-hue), 10%, 65%);--primary-color-dark: hsl(var(--primary-hue), 65%, 75%);--primary-color-darker-dark: hsl(var(--primary-hue), 60%, 68%);--secondary-color-dark: hsl(var(--secondary-hue), 55%, 70%);--accent-color-dark: hsl(var(--accent-hue), 75%, 75%);--danger-color-dark: hsl(var(--danger-hue), 65%, 65%);--border-color-dark: hsl(var(--base-hue), 10%, 28%);--shadow-light-dark: .15;--shadow-medium-dark: .2;--shadow-large-dark: .25;--due-color-dark: #f39c12;--new-color-dark: #5dade2;--learning-color-dark: #f7dc6f;--mastered-color-dark: #82e0aa;--button-bg-dark: hsl(var(--base-hue), 10%, 25%);--button-bg-hover-dark: hsl(var(--base-hue), 10%, 32%);--button-text-dark: var(--text-color-dark);--scrollbar-track-dark: hsl(var(--base-hue), 10%, 15%);--scrollbar-thumb-dark: hsl(var(--base-hue), 10%, 45%);--scrollbar-thumb-hover-dark: hsl(var(--base-hue), 10%, 55%);--bg-color: var(--bg-color-light);--card-bg: var(--card-bg-light);--modal-bg: var(--modal-bg-light);--text-color: var(--text-color-light);--text-light: var(--text-light-light);--primary-color: var(--primary-color-light);--primary-color-darker: var(--primary-color-darker-light);--secondary-color: var(--secondary-color-light);--accent-color: var(--accent-color-light);--danger-color: var(--danger-color-light);--border-color: var(--border-color-light);--button-bg: var(--button-bg-light);--button-bg-hover: var(--button-bg-hover-light);--button-text: var(--button-text-light);--scrollbar-track: var(--scrollbar-track-light);--scrollbar-thumb: var(--scrollbar-thumb-light);--scrollbar-thumb-hover: var(--scrollbar-thumb-hover-light);--due-color: var(--due-color-light);--new-color: var(--new-color-light);--learning-color: var(--learning-color-light);--mastered-color: var(--mastered-color-light);--shadow-color-calc: var(--shadow-color-hsl);--shadow-opacity-light: var(--shadow-light);--shadow-opacity-medium: var(--shadow-medium);--shadow-opacity-large: var(--shadow-large)}body.dark-mode{--bg-color: var(--bg-color-dark);--card-bg: var(--card-bg-dark);--modal-bg: var(--modal-bg-dark);--text-color: var(--text-color-dark);--text-light: var(--text-light-dark);--primary-color: var(--primary-color-dark);--primary-color-darker: var(--primary-color-darker-dark);--secondary-color: var(--secondary-color-dark);--accent-color: var(--accent-color-dark);--danger-color: var(--danger-color-dark);--border-color: var(--border-color-dark);--button-bg: var(--button-bg-dark);--button-bg-hover: var(--button-bg-hover-dark);--button-text: var(--button-text-dark);--scrollbar-track: var(--scrollbar-track-dark);--scrollbar-thumb: var(--scrollbar-thumb-dark);--scrollbar-thumb-hover: var(--scrollbar-thumb-hover-dark);--due-color: var(--due-color-dark);--new-color: var(--new-color-dark);--learning-color: var(--learning-color-dark);--mastered-color: var(--mastered-color-dark);--shadow-color-calc: 0, 0%, 0%;--shadow-opacity-light: var(--shadow-light-dark);--shadow-opacity-medium: var(--shadow-medium-dark);--shadow-opacity-large: var(--shadow-large-dark)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:var(--font-primary);background-color:var(--bg-color);color:var(--text-color);min-height:100vh;display:flex;justify-content:center;align-items:flex-start;padding:40px 20px;transition:background-color .4s ease,color .4s ease;overflow-x:hidden;line-height:1.7}#app-container{width:100%;max-width:950px;display:flex;flex-direction:column;gap:40px}i[class^=ph-]{font-size:1.2em;vertical-align:middle;line-height:1;display:inline-block}button{cursor:pointer;font-family:var(--font-primary);border:none;background:none;color:inherit;transition:all var(--transition-fast)}input,textarea,select{font-family:var(--font-primary);font-size:1rem;color:var(--text-color);border-radius:var(--border-radius-medium);border:1px solid var(--border-color);background-color:var(--bg-color);padding:14px 18px;transition:all var(--transition-fast)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px hsla(var(--primary-hue),75%,70%,.4)}body.dark-mode input:focus,body.dark-mode textarea:focus,body.dark-mode select:focus{box-shadow:0 0 0 3px hsla(var(--primary-hue),75%,80%,.3)}hr{border:none;border-top:1px solid var(--border-color);margin:40px 0}.app-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:20px;border-bottom:1px solid var(--border-color);flex-wrap:wrap;gap:15px;position:relative;z-index:10}.app-header h1{font-size:1.8rem;font-weight:600;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;background-clip:text;color:transparent;display:inline-flex;align-items:center;gap:14px;margin-right:auto}.app-header h1 i{font-size:1.7rem}.settings-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.base-btn,.icon-btn-text,#controls-area button:not(.icon-btn),.modal-actions button,.quiz-controls button,.quiz-results-area button,#confirm-start-quiz-btn,#add-edit-form button[type=submit],#add-edit-form button[type=button],#import-btn,#export-btn,#clear-all-btn,#check-typing-btn{padding:10px 20px;font-size:.9rem;border:1px solid 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button:active,.quiz-controls button:active,.quiz-results-area button:active,#confirm-start-quiz-btn:active,#add-edit-form button[type=submit]:active,#add-edit-form button[type=button]:active,#import-btn:active,#export-btn:active,#clear-all-btn:active,#check-typing-btn:active{transform:translateY(0);box-shadow:0 2px 4px hsla(var(--shadow-color-calc),var(--shadow-opacity-light));background-color:hsl(var(--base-hue),30%,88%)}body.dark-mode .icon-btn-text:active,body.dark-mode #controls-area button:not(.icon-btn):active,body.dark-mode #check-typing-btn:active{background-color:hsl(var(--base-hue),10%,35%)}.icon-btn{padding:0;font-size:1.2rem;line-height:1;width:42px;height:42px;border-radius:50%;display:inline-flex;justify-content:center;align-items:center;background-color:var(--button-bg);color:var(--button-text);box-shadow:0 2px 5px hsla(var(--shadow-color-calc),var(--shadow-opacity-light));transition:all var(--transition-fast);border:1px solid transparent}.icon-btn:hover{background-color:var(--button-bg-hover);box-shadow:0 4px 8px hsla(var(--shadow-color-calc),var(--shadow-opacity-medium));transform:translateY(-1px) scale(1.05);border-color:var(--border-color)}.icon-btn:active{transform:translateY(0) scale(1);box-shadow:0 1px 3px hsla(var(--shadow-color-calc),var(--shadow-opacity-light))}.icon-btn i{margin:0;font-size:1.3em}.settings-controls button{margin-left:5px}.settings-controls .icon-btn-text{padding:9px 18px;font-size:.85rem}.settings-controls .icon-btn{width:40px;height:40px}.settings-controls .icon-btn i{font-size:1.2em}.settings-controls button.muted{opacity:.6}select#main-topic-filter,select#panel-topic-filter{padding:9px 35px 9px 18px;font-size:.85rem;border:1px solid var(--border-color);border-radius:var(--border-radius-large);background-color:var(--button-bg);color:var(--button-text);font-weight:500;box-shadow:0 1px 3px hsla(var(--shadow-color-calc),.05);cursor:pointer;-moz-appearance:none;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23667'%3E%3Cpath d='M12 15.5a1 1 0 0 1-.71-.29l-4-4a1 1 0 1 1 1.42-1.42L12 13.1l3.29-3.3a1 1 0 1 1 1.42 1.42l-4 4a1 1 0 0 1-.71.29Z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:20px;transition:all var(--transition-fast);margin-right:8px}body.dark-mode select#main-topic-filter,body.dark-mode select#panel-topic-filter{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23bbb'%3E%3Cpath d='M12 15.5a1 1 0 0 1-.71-.29l-4-4a1 1 0 1 1 1.42-1.42L12 13.1l3.29-3.3a1 1 0 1 1 1.42 1.42l-4 4a1 1 0 0 1-.71.29Z'/%3E%3C/svg%3E")}select#main-topic-filter:hover,select#panel-topic-filter:hover{background-color:var(--button-bg-hover);box-shadow:0 3px 7px hsla(var(--shadow-color-calc),.08);border-color:var(--border-color)}.main-content{display:flex;flex-direction:column;align-items:center;gap:25px;width:100%}#flashcard-area{width:100%;max-width:600px;margin-bottom:15px}.flashcard-perspective{width:100%;perspective:1500px}.flashcard{width:100%;min-height:350px;position:relative;transform-style:preserve-3d;box-shadow:0 10px 30px hsla(var(--shadow-color-calc),var(--shadow-opacity-large));border-radius:var(--border-radius-large)}.card-face{position:absolute;top:0;left:0;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:var(--border-radius-large);display:flex;flex-direction:column;padding:45px 50px;overflow:hidden;background-color:var(--card-bg);transition:opacity .2s ease}.card-front{z-index:2;align-items:center;justify-content:center;text-align:center}.card-back{transform:rotateY(180deg);z-index:1;justify-content:space-between;align-items:stretch;text-align:left}.card-front h2{font-size:2.8rem;margin-bottom:40px;font-weight:600;color:var(--primary-color);letter-spacing:.5px;word-break:break-word;line-height:1.3}.card-actions-front{position:absolute;bottom:35px;right:35px;display:flex;gap:18px}.card-back-content{width:100%;display:flex;flex-direction:column;gap:22px;margin-bottom:30px;flex-grow:1}.detail-row{display:grid;grid-template-columns:90px 1fr;gap:20px;align-items:baseline}.detail-row .label{font-weight:500;font-size:.9rem;color:var(--text-light);text-align:right;opacity:.8}.detail-row .content{font-size:1.15rem;word-break:break-word;line-height:1.6;font-weight:400}#card-vietnamese{font-weight:600;font-size:1.5rem;color:var(--primary-color)}#card-type,#card-pronunciation{font-size:1.05rem;opacity:.9}#card-pronunciation{font-style:italic}.pronounce-clickable:hover{color:var(--primary-color)}.tags-row .label{align-self:start}.tags-row .content{font-size:.85rem;font-style:italic;color:var(--secondary-color);display:flex;flex-wrap:wrap;gap:6px 8px}.example-row{grid-column:1 / -1;margin-top:15px;border-top:1px dashed var(--border-color);padding-top:20px}.example-row .label{align-self:start}#card-example{font-size:1rem;font-style:italic;opacity:.9;line-height:1.7}.card-actions-back{display:flex;justify-content:flex-end;align-items:center;width:100%;gap:15px;padding-top:20px;border-top:1px solid var(--border-color);flex-shrink:0}#star-btn i.ph-star{color:var(--text-light);opacity:.7}#star-btn i.ph-fill.ph-star{color:#f1c40f;opacity:1}#star-btn:hover i{transform:scale(1.15);opacity:1}.status-badge{font-size:.8rem;padding:6px 14px;border-radius:15px;font-weight:500;margin-right:auto;border:1.5px solid;text-align:center;min-width:85px}.status-badge.status-new{color:var(--new-color);border-color:var(--new-color)}.status-badge.status-learning{color:var(--learning-color);border-color:var(--learning-color)}.status-badge.status-mastered{color:var(--mastered-color);border-color:var(--mastered-color)}#controls-area{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:18px;margin-top:30px;width:100%;max-width:650px}#srs-feedback-buttons{display:flex;gap:18px}.srs-btn{min-width:110px}.srs-btn[data-rating="1"]:hover{background-color:hsla(var(--danger-hue),70%,90%,.5);border-color:var(--danger-color)}.srs-btn[data-rating="2"]:hover{background-color:hsla(var(--primary-hue),70%,92%,.5);border-color:var(--primary-color)}.srs-btn[data-rating="3"]:hover{background-color:hsla(var(--secondary-hue),60%,90%,.5);border-color:var(--secondary-color)}body.dark-mode .srs-btn[data-rating="1"]:hover{background-color:hsla(var(--danger-hue),60%,50%,.3);border-color:var(--danger-color)}body.dark-mode .srs-btn[data-rating="2"]:hover{background-color:hsla(var(--primary-hue),60%,60%,.2);border-color:var(--primary-color)}body.dark-mode .srs-btn[data-rating="3"]:hover{background-color:hsla(var(--secondary-hue),50%,60%,.2);border-color:var(--secondary-color)}#no-card-message{width:100%;text-align:center;color:var(--text-light);padding:30px 20px;font-size:1.1rem;opacity:.8}#stats-area{text-align:center;font-size:.9rem;color:var(--text-light);margin-top:35px;line-height:1.6;opacity:.9}#stats-area p{margin-bottom:8px}#stats-area strong{font-weight:600;margin-left:5px;color:var(--text-color)}#stats-area .stat-due strong{color:var(--due-color)}.sub-stats{font-size:.85rem}.sub-stats span{margin:0 12px}.sub-stats .stat-new strong{color:var(--new-color)}.sub-stats .stat-learning strong{color:var(--learning-color)}.sub-stats .stat-mastered strong{color:var(--mastered-color)}.modal{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1000;display:flex;justify-content:center;align-items:center;padding:15px}.modal.hidden{opacity:0;visibility:hidden;pointer-events:none}.modal-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background-color:hsla(var(--primary-hue),20%,10%,.65);z-index:1;cursor:pointer;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}body.dark-mode .modal-overlay{background-color:hsla(var(--primary-hue),15%,5%,.75)}.modal-content{position:relative;background:var(--modal-bg);border:none;border-radius:var(--border-radius-large);padding:40px 45px;box-shadow:0 15px 40px hsla(var(--shadow-color-calc),var(--shadow-opacity-large));max-height:85vh;z-index:2;width:100%;max-width:550px;overflow-y:auto}.modal-large .modal-content{max-width:900px}.small-modal .modal-content{max-width:420px;text-align:center;padding:45px}.modal-close-btn{position:absolute;top:18px;right:18px;background:none;border:none;font-size:1.6rem;cursor:pointer;padding:8px;opacity:.5;color:var(--text-light);line-height:1;border-radius:50%;transition:all var(--transition-fast);z-index:3}.modal-close-btn:hover{opacity:1;color:var(--accent-color);background-color:hsla(var(--accent-hue),50%,50%,.1);transform:rotate(90deg) scale(1.1)}.modal h2,.modal h3{margin-bottom:35px;color:var(--primary-color);font-weight:600;text-align:center;font-size:1.4rem}.modal h2 i{margin-right:14px;font-size:1.3em}.modal-actions{margin-top:35px;display:flex;justify-content:flex-end;gap:15px}.small-modal .modal-actions{justify-content:center}#add-edit-form{display:flex;flex-direction:column;gap:25px}.form-group{display:flex;flex-direction:column;gap:10px}.form-group label{font-size:.9rem;font-weight:500;color:var(--text-light)}.form-group textarea{resize:vertical;min-height:80px}#add-edit-form button[type=submit]{margin-top:20px;align-self:center;background-color:var(--primary-color);color:#fff;padding:12px 35px}#add-edit-form button[type=submit]:hover{background-color:var(--primary-color-darker)}#cancel-edit-btn{background-color:#ccc;color:#666}#cancel-edit-btn:hover{background-color:#b3b3b3}body.dark-mode #cancel-edit-btn{background-color:hsl(var(--base-hue),10%,30%);color:var(--text-light-dark)}body.dark-mode #cancel-edit-btn:hover{background-color:hsl(var(--base-hue),10%,40%)}.manage-controls{display:flex;gap:18px;margin-bottom:30px;align-items:center;flex-wrap:wrap}.manage-controls input[type=search]{flex-grow:1;border-radius:var(--border-radius-large);padding:10px 18px;font-size:.9rem}.manage-controls select,.manage-controls button{flex-shrink:0}#word-list-section{max-height:55vh;overflow-y:auto;border:1px solid var(--border-color);border-radius:var(--border-radius-medium);margin-bottom:30px;background-color:hsla(var(--bg-hue, var(--base-hue)),20%,97%,.3)}body.dark-mode #word-list-section{background-color:hsla(var(--bg-hue, var(--base-hue)),10%,15%,.3)}#word-list-display table{width:100%;border-collapse:collapse}#word-list-display th,#word-list-display td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border-color);font-size:.95rem;vertical-align:middle}#word-list-display th{font-weight:600;position:sticky;top:0;background:var(--modal-bg);z-index:1;font-size:.8rem;color:var(--text-light);text-transform:uppercase;letter-spacing:.8px;border-bottom:2px solid var(--border-color)}#word-list-display tbody tr:hover{background-color:hsla(var(--primary-hue),50%,92%,.6)}body.dark-mode #word-list-display tbody tr:hover{background-color:hsla(var(--primary-hue),20%,28%,.6)}.word-list-actions{white-space:nowrap;text-align:right;min-width:125px}.word-list-actions button{margin-left:10px;width:34px;height:34px;font-size:.9rem;opacity:.6}.word-list-actions button:hover{opacity:1}.word-list-tags{font-size:.8em;color:var(--text-light);opacity:.8;display:block;margin-top:3px}#manage-io-section h3{margin-bottom:20px;display:flex;align-items:center;gap:12px;justify-content:center;font-weight:600;font-size:1.25rem}#manage-io-section h3 i{font-size:1.3em;color:var(--primary-color)}.io-controls{display:flex;align-items:center;gap:15px;margin-bottom:20px;flex-wrap:wrap}.io-controls .form-group{flex-grow:1;display:flex;align-items:center;gap:10px;margin-bottom:0}.io-controls label{margin-bottom:0;flex-shrink:0;font-size:.9rem}.io-controls input[type=file]{flex-grow:1;border:none;background:none;padding:0;font-size:.9rem;color:var(--text-light)}.io-controls input[type=file]::file-selector-button{padding:6px 12px;border-radius:8px;background-color:var(--button-bg);color:var(--button-text);border:1px solid var(--border-color);cursor:pointer;transition:background-color var(--transition-fast);margin-right:12px;font-size:.85rem}.io-controls input[type=file]::file-selector-button:hover{background-color:var(--button-bg-hover)}#import-btn{margin-left:auto;flex-shrink:0}.io-actions{display:flex;gap:15px;margin-top:20px;margin-bottom:10px;flex-wrap:wrap;justify-content:center}.danger-btn{background-color:var(--danger-color);border-color:transparent;color:#fff}.danger-btn:hover{background-color:hsl(var(--danger-hue),75%,55%);border-color:transparent;filter:brightness(1.1)}body.dark-mode .danger-btn{background-color:var(--danger-color-dark)}body.dark-mode .danger-btn:hover{background-color:hsl(var(--danger-hue),70%,60%)}.small-note{font-size:.8rem;opacity:.65;margin-top:15px;line-height:1.5;text-align:center}#import-result{margin-top:15px;font-size:.9rem;font-weight:500;text-align:center;min-height:1.3em}.quiz-container{width:100%;max-width:750px;margin:20px auto;padding:40px 45px;background:var(--modal-bg);border-radius:var(--border-radius-large);box-shadow:0 10px 35px hsla(var(--shadow-color-calc),var(--shadow-opacity-medium));border:1px solid var(--border-color);display:flex;flex-direction:column;gap:35px}.quiz-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);padding-bottom:25px;flex-wrap:wrap;gap:15px}.quiz-header h2{color:var(--primary-color);margin-right:auto;font-weight:600;display:flex;align-items:center;gap:12px;font-size:1.6rem}.quiz-header h2 i{font-size:1.4rem}.quiz-info{display:flex;gap:25px;font-size:1rem;opacity:.9}.quiz-question-area{text-align:center;padding:20px 0}.quiz-prompt{opacity:.8;margin-bottom:12px;font-size:1.05rem}#quiz-vietnamese-prompt{font-size:2.3rem;font-weight:600;margin-bottom:35px;color:var(--secondary-color)}#quiz-answer-input{width:80%;max-width:480px;padding:16px 20px;font-size:1.3rem;text-align:center;border-radius:var(--border-radius-medium);margin-bottom:20px}.quiz-feedback{min-height:1.7em;font-weight:500;font-size:1.15rem;margin-top:15px}.quiz-feedback.correct{color:var(--mastered-color)}.quiz-feedback.incorrect{color:var(--danger-color)}.quiz-controls{text-align:center;margin-top:15px}#quiz-results-area{text-align:center;padding:35px;border-top:1px solid var(--border-color);margin-top:25px}#quiz-results-area h3{margin-bottom:30px;font-size:1.9rem;color:var(--primary-color)}#quiz-results-area p{margin-bottom:18px;font-size:1.25rem}#quiz-results-area button{margin:18px 10px 0}#quiz-setup-area{padding:35px;text-align:center;border-top:1px solid var(--border-color);margin-top:25px;display:flex;flex-direction:column;gap:25px;align-items:center}#quiz-setup-area h3{margin-bottom:15px;font-size:1.4rem}#quiz-setup-area label{font-weight:500;margin-right:10px}#quiz-setup-area select,#quiz-setup-area input[type=number]{padding:10px 15px;border-radius:var(--border-radius-medium)}#quiz-setup-area input[type=number]{width:80px}#confirm-start-quiz-btn{margin-top:20px;background-color:var(--primary-color);color:#fff;font-weight:500;padding:12px 30px}#confirm-start-quiz-btn:hover{background-color:var(--primary-color-darker)}.typing-input-container{width:100%;max-width:600px;margin-top:0;margin-bottom:20px;padding:30px 35px;background:var(--card-bg);border-radius:var(--border-radius-large);box-shadow:0 10px 25px hsla(var(--shadow-color-calc),var(--shadow-opacity-medium));border:1px solid var(--border-color);display:flex;flex-direction:column;align-items:center;gap:18px;transition:all .3s ease}.typing-prompt{font-size:1rem;color:var(--text-light);margin-bottom:5px}.typing-vietnamese-word{font-size:1.9rem;font-weight:600;color:var(--secondary-color);margin-bottom:18px}#typing-input{width:85%;max-width:380px;padding:14px 18px;font-size:1.2rem;text-align:center;border-radius:var(--border-radius-medium)}#check-typing-btn{margin-top:10px}.typing-feedback{min-height:1.6em;font-weight:500;font-size:1.05rem;margin-top:8px}.typing-feedback.correct{color:var(--mastered-color)}.typing-feedback.incorrect{color:var(--danger-color)}.hidden{display:none!important}@media (max-width: 768px){body{padding:30px 15px}#app-container{gap:30px}.app-header h1{font-size:1.6rem;gap:12px}.card-face{padding:35px 30px}.card-front h2{font-size:2.4rem}.detail-row{grid-template-columns:80px 1fr;gap:15px}.detail-row .content{font-size:1.1rem}#card-vietnamese{font-size:1.4rem}.modal-content{padding:30px 35px}.quiz-container{padding:30px 35px;gap:30px}#quiz-vietnamese-prompt{font-size:2rem}}@media (max-width: 600px){body{padding:25px 10px}#app-container{gap:25px}.app-header h1{font-size:1.5rem}.settings-controls{gap:8px}.icon-btn-text{padding:8px 16px;gap:8px}.icon-btn{width:38px;height:38px}.icon-btn i{font-size:1.1em}#flashcard-area{max-width:100%;margin-bottom:10px}.card-face{padding:30px 25px}.card-front h2{font-size:2rem;margin-bottom:30px}.detail-row{grid-template-columns:70px 1fr;gap:12px}.detail-row .content{font-size:1.05rem}#card-vietnamese{font-size:1.3rem}#controls-area{margin-top:20px;gap:15px}.srs-btn{min-width:90px;padding:9px 15px}.typing-input-container{padding:25px 20px;gap:15px}#typing-input{width:90%}.quiz-container{padding:25px 30px;gap:25px}#quiz-vietnamese-prompt{font-size:1.8rem;margin-bottom:30px}#quiz-answer-input{width:90%;font-size:1.1rem;padding:14px 18px}#quiz-results-area p{font-size:1.15rem}#quiz-setup-area{padding:30px;gap:20px}}@media (max-width: 420px){body{padding:20px 8px}.app-header h1{font-size:1.3rem;gap:10px}.app-header h1 i{font-size:1.3rem}.settings-controls{gap:5px}.icon-btn-text{padding:7px 12px;font-size:.75rem;gap:6px}.icon-btn{width:34px;height:34px}.icon-btn i{font-size:1em}#main-topic-filter,#panel-topic-filter{padding:8px 28px 8px 14px;font-size:.75rem;background-size:18px}.card-face{padding:25px 20px}.card-front h2{font-size:1.7rem}.detail-row{grid-template-columns:60px 1fr;gap:10px}.detail-row .label{font-size:.8rem}.detail-row .content{font-size:.95rem}#card-vietnamese{font-size:1.15rem}#card-example{font-size:.9rem}#controls-area button{padding:9px 18px;font-size:.85rem}.srs-btn{min-width:75px}.modal-content{padding:25px 20px}.modal h2,.modal h3{font-size:1.1rem;margin-bottom:25px}#add-edit-form{gap:20px}#add-edit-form button[type=submit]{padding:10px 25px}#quiz-vietnamese-prompt{font-size:1.6rem}#quiz-answer-input{padding:12px 15px;font-size:1rem}#quiz-results-area h3{font-size:1.6rem}#quiz-results-area p{font-size:1.1rem}}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--scrollbar-track);border-radius:5px}::-webkit-scrollbar-thumb{background-color:var(--scrollbar-thumb);border-radius:5px;border:2px solid transparent;background-clip:content-box}::-webkit-scrollbar-thumb:hover{background-color:var(--scrollbar-thumb-hover)}body{scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track);scrollbar-width:thin}.manage-controls{display:grid;grid-template-columns:1fr auto auto auto;gap:15px;align-items:center;margin-bottom:25px}.manage-controls input[type=search]{grid-column:1 / -1}@media (min-width: 600px){.manage-controls input[type=search]{grid-column:auto}}.word-list-cards-container{max-height:50vh;overflow-y:auto;padding-right:10px;margin:0 -10px;padding-left:10px}#word-list-display{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px}.word-card{background-color:var(--button-bg);border:1px solid var(--border-color);border-radius:var(--border-radius-medium);padding:20px;display:flex;flex-direction:column;gap:12px;transition:all var(--transition-fast);position:relative;overflow:hidden}.word-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px hsla(var(--shadow-color-calc),var(--shadow-opacity-medium));border-color:var(--primary-color)}.word-card.is-suspended{opacity:.6;background-color:hsl(var(--base-hue),10%,90%)}body.dark-mode .word-card.is-suspended{background-color:hsl(var(--base-hue),10%,22%)}.word-card-header{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px dashed var(--border-color);padding-bottom:10px}.word-card-header .word-english{font-size:1.4rem;font-weight:600;color:var(--primary-color)}.word-card-header .word-type{font-size:.8rem;font-style:italic;color:var(--text-light);margin-left:10px}.word-card-checkbox{margin-left:auto;transform:scale(1.2)}.word-card-body .word-vietnamese{font-size:1.1rem;font-weight:500}.word-card-body .word-pronunciation{font-size:.9rem;color:var(--text-light)}.word-card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px;border-top:1px dashed var(--border-color)}.word-card-tags{font-size:.8rem;font-style:italic;color:var(--secondary-color);max-width:60%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.word-card-actions{display:flex;gap:8px}.word-card-actions .icon-btn{width:32px;height:32px;opacity:.7}.word-card-actions .icon-btn:hover{opacity:1}.manage-actions-footer{padding-top:15px;text-align:right}.io-grid{display:grid;grid-template-columns:1fr;gap:30px;margin:20px 0}@media (min-width: 768px){.io-grid{grid-template-columns:1fr 1fr}}.io-column{border:1px solid var(--border-color);border-radius:var(--border-radius-medium);padding:25px;text-align:center}.io-column h4{font-size:1.1rem;margin-bottom:10px}.io-column .small-note{min-height:3em;margin-bottom:20px}.file-input{width:.1px;height:.1px;opacity:0;overflow:hidden;position:absolute;z-index:-1}.file-label{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;border:2px dashed var(--border-color);border-radius:var(--border-radius-medium);cursor:pointer;transition:all var(--transition-fast)}.file-label i{font-size:2.5rem;color:var(--primary-color);margin-bottom:10px}.file-label span{font-weight:500}.file-label:hover{border-color:var(--primary-color);background-color:var(--button-bg)}#import-preview-stats{background-color:var(--button-bg);padding:20px;border-radius:var(--border-radius-medium);margin-bottom:25px}#import-preview-stats ul{list-style:none;padding-left:10px}#import-preview-stats li{display:flex;align-items:center;gap:10px;margin-top:10px}#import-preview-stats i{font-size:1.3rem;color:var(--primary-color)}#import-preview-table-container{max-height:30vh;overflow-y:auto;border:1px solid var(--border-color);border-radius:var(--border-radius-medium)}#import-preview-table{width:100%;border-collapse:collapse}#import-preview-table th,#import-preview-table td{padding:10px 15px;text-align:left;border-bottom:1px solid var(--border-color);font-size:.9rem}#import-preview-table th{background-color:var(--button-bg);position:sticky;top:0}#typing-input{transition:border-color .3s ease,background-color .3s ease,box-shadow .3s ease}#typing-input.correct{border-color:var(--mastered-color);background-color:hsla(var(--mastered-color-hue, 145),63%,95%,1);box-shadow:0 0 0 3px hsla(var(--mastered-color-hue, 145),63%,80%,.7)}body.dark-mode #typing-input.correct{background-color:hsla(var(--mastered-color-hue, 145),63%,20%,.5);box-shadow:0 0 0 3px hsla(var(--mastered-color-hue, 145),63%,40%,.7)}#typing-input.incorrect{border-color:var(--danger-color);background-color:hsla(var(--danger-hue, 0),70%,95%,1);box-shadow:0 0 0 3px hsla(var(--danger-hue, 0),70%,80%,.7)}body.dark-mode #typing-input.incorrect{background-color:hsla(var(--danger-hue, 0),70%,20%,.5);box-shadow:0 0 0 3px hsla(var(--danger-hue, 0),70%,40%,.7)}:root{--mastered-color-hue: 145;--danger-hue: 0}#manual-sync-btn:hover i:not(.animate-spin){color:var(--primary-color);filter:drop-shadow(0 0 4px var(--primary-color))}@keyframes spin-glow{0%{transform:rotate(0);filter:drop-shadow(0 0 2px rgba(138,228,255,.4))}50%{filter:drop-shadow(0 0 12px rgba(86,204,242,.9))}to{transform:rotate(360deg);filter:drop-shadow(0 0 2px rgba(138,228,255,.4))}}#manual-sync-btn{width:42px!important;height:42px!important;border-radius:50%!important;display:inline-flex!important;justify-content:center!important;align-items:center!important;padding:0!important;flex-shrink:0}#manual-sync-btn i{font-size:1.4rem;line-height:1;margin:0!important;transition:all .3s ease}@keyframes wave-pulse{0%{box-shadow:0 0 #27ae60b3}70%{box-shadow:0 0 0 15px #27ae6000}to{box-shadow:0 0 #27ae6000}}.syncing-active{animation:wave-pulse 1.5s infinite;pointer-events:none;cursor:wait;background-color:#27ae6026!important}@keyframes spin{to{transform:rotate(360deg)}}.animate-spin{animation:spin 1s linear infinite;display:inline-block;color:#27ae60!important}#toggle-taskbar-btn{display:none}@media (max-width: 768px){.app-header{position:relative;flex-wrap:nowrap}#toggle-taskbar-btn{display:flex;margin-left:auto;z-index:101}#taskbar-menu{position:absolute;top:100%;right:0;background-color:var(--modal-bg);flex-direction:column;align-items:stretch;padding:15px;border-radius:var(--border-radius-medium);box-shadow:0 10px 30px hsla(var(--shadow-color-calc),var(--shadow-opacity-large));border:1px solid var(--border-color);z-index:100;min-width:240px;opacity:0;visibility:hidden;transform:translateY(-15px);transition:all .3s cubic-bezier(.4,0,.2,1)}#taskbar-menu.show{opacity:1;visibility:visible;transform:translateY(10px)}#taskbar-menu>*{margin:6px 0!important;width:100%;justify-content:flex-start;padding:12px 18px}#taskbar-menu .icon-btn{width:100%!important;border-radius:var(--border-radius-large)!important;justify-content:flex-start!important;padding:12px 18px!important;height:auto!important}#manual-sync-btn:after{content:"Đồng bộ Cloud";margin-left:10px;font-size:.95rem;font-weight:500;color:var(--text-color)}#toggle-dark-mode-btn:after{content:"Giao diện Tối/Sáng";margin-left:10px;font-size:.95rem;font-weight:500;color:var(--text-color)}#toggle-sound-btn:after{content:"Bật/Tắt Âm thanh";margin-left:10px;font-size:.95rem;font-weight:500;color:var(--text-color)}}