/* Sentence Practice CSS */



/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: white;
    min-height: 100vh;
    color: #333;
}

/* Header Styles */
.header {
    background: white;
    border-bottom: 2px solid #e0e0e0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Translation Control */
.translation-control {
    position: relative;
}

.translation-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.translation-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: scale(1.05);
}

.translation-btn img {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%);
}

.translation-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 250px;
    z-index: 1000;
    margin-top: 8px;
}

.translation-dropdown.hidden {
    display: none;
}

.dropdown-header {
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
    font-size: 14px;
}

.toggle-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 14px;
}

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
    background: #ccc;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.3s;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

.toggle-switch input:checked + .slider {
    transform: translateX(20px);
}

.toggle-switch input:checked ~ .toggle-switch {
    background: #000;
}

/* Sound Container */
.sound-container {
    position: relative;
}

.sound-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.sound-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.sound-btn img {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%);
}

.sound-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 280px;
    z-index: 1000;
    margin-top: 8px;
    display: none;
}

.sound-dropdown.show {
    display: block;
}

.sound-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sound-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.sound-checkbox input[type="checkbox"] {
    margin-right: 8px;
    /* Custom checkbox styling */
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid #ccc;
    border-radius: 3px;
    background: white;
    cursor: pointer;
    position: relative;
    vertical-align: middle;
}

/* Checked state - black background */
.sound-checkbox input[type="checkbox"]:checked {
    background: black;
    border-color: black;
}

/* White checkmark */
.sound-checkbox input[type="checkbox"]:checked::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
    line-height: 1;
}

.sound-type-control, .volume-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sound-type-control label, .volume-control label {
    font-size: 12px;
    font-weight: 500;
}

.sound-type-control select {
    padding: 4px 8px;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 12px;
}

.volume-control input[type="range"] {
    width: 100%;
    margin-bottom: 5px;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: #ddd;
    border-radius: 3px;
    outline: none;
    transition: background 0.3s ease;
}

.volume-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: black;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.volume-control input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: black;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.volume-control input[type="range"]::-webkit-slider-track {
    background: linear-gradient(to right, black 0%, black var(--value, 50%), #ddd var(--value, 50%), #ddd 100%);
    border-radius: 3px;
}

.volume-control input[type="range"]::-moz-range-track {
    background: linear-gradient(to right, black 0%, black var(--value, 50%), #ddd var(--value, 50%), #ddd 100%);
    border-radius: 3px;
}

.preview-sound-btn, .reset-sound-btn {
    padding: 6px 12px;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.preview-sound-btn:hover, .reset-sound-btn:hover {
    background: #000;
    color: white;
}

/* Auto Pronounce Container */
.autopronounce-container {
    position: relative;
}

/* Dictation Mode Container */
.dictation-container {
    position: relative;
    display: inline-block;
    margin-left: 8px;
}

.dictation-btn {
    background: white;
    border: none;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.dictation-btn:hover {
    background: black;
    transform: translateY(-1px);
}

.dictation-btn.active {
    background: black;
}

.dictation-btn.active img {
    filter: brightness(0) invert(1);
}

.dictation-btn img {
    width: 20px;
    height: 20px;
    transition: filter 0.3s ease;
}

.dictation-btn:hover img {
    filter: brightness(0) invert(1);
}

.autopronounce-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.autopronounce-btn:hover {
    background: rgba(0, 0, 0, 0.1);
}

.autopronounce-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) saturate(100%);
}

.autopronounce-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    padding: 16px;
    min-width: 220px;
    z-index: 1000;
    margin-top: 8px;
    display: none;
}

.autopronounce-dropdown.show {
    display: block;
}

.autopronounce-title {
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
    font-size: 14px;
}

.autopronounce-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 14px;
}

.autopronounce-label {
    flex: 1;
}

/* Custom switch styling */
.switch {
    position: relative;
    width: 34px;
    height: 18px;
    background: #e5e5e5;
    border-radius: 9999px;
    border: none;
    cursor: pointer;
    padding: 2px;
    display: inline-flex;
    align-items: center;
    transition: background 150ms ease;
}

.switch .knob {
    width: 14px;
    height: 14px;
    background: #000;
    border-radius: 50%;
    transform: translateX(0);
    transition: transform 150ms ease;
}

.switch.on {
    background: #000;
}

.switch.on .knob {
    background: #000;
    transform: translateX(16px);
}

/* Preference Dropdown */
.preference-dropdown {
    position: relative;
}

.preference-btn {
    background: white;
    color: black;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.preference-btn:hover {
    background: black;
    color: white;
    transform: translateY(-1px);
}

.dropdown-content {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    min-width: 300px;
    max-width: 400px;
    z-index: 1001;
    display: none;
    padding: 20px;
    margin-top: 5px;
}

.dropdown-content.show {
    display: block;
}

.dropdown-content > div {
    margin-bottom: 15px;
}

.dropdown-content label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    color: #333;
}

.dropdown-content select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background: white;
}

.font-option, .font-size-option, .translation-language-option {
    margin-bottom: 16px;
}

.font-size-option label, .translation-language-option label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
    color: #333;
    font-size: 12px;
}

.font-size-option select, .translation-language-option select {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    border-radius: 3px;
    font-size: 12px;
    background-color: white;
}

.apply-translation-btn {
    margin-top: 8px;
    padding: 6px 12px;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.apply-translation-btn:hover {
    background: #000;
    color: white;
}

/* Speech Controls */
.speech-controls {
    border-top: 1px solid #e0e0e0;
    padding-top: 16px;
}

.speech-controls h4 {
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
    font-size: 14px;
}

.voice-option, .speed-option {
    margin-bottom: 12px;
}

.voice-option label, .speed-option label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
    color: #333;
    font-size: 12px;
}

.voice-option select {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid #d1d5db;
    border-radius: 3px;
    font-size: 12px;
    background-color: white;
    color: #000;
    margin-bottom: 8px;
}

.voice-option select:focus {
    outline: none;
    border-color: #000;
}

.voice-option select option {
    background-color: #fff;
    color: #000;
}

.voice-option select option:checked {
    background-color: #000;
    color: #fff;
}

.test-voice-btn, .reset-speed-btn {
    padding: 4px 8px;
    background: white;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.test-voice-btn:hover, .reset-speed-btn:hover {
    background: #000;
    color: white;
}

.current-voice {
    font-size: 11px;
    color: #666;
    margin-top: 4px;
}

.speed-option input[type="range"] {
    width: 100%;
    margin: 8px 0;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: #ddd;
    border-radius: 3px;
    outline: none;
}

/* Webkit browsers (Chrome, Safari, Edge) */
.speed-option input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: #000;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.speed-option input[type="range"]::-webkit-slider-track {
    background: linear-gradient(to right, #000 0%, #000 var(--value, 50%), #ddd var(--value, 50%), #ddd 100%);
    border-radius: 3px;
}

/* Firefox */
.speed-option input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: #000;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.speed-option input[type="range"]::-moz-range-track {
    background: linear-gradient(to right, #000 0%, #000 var(--value, 50%), #ddd var(--value, 50%), #ddd 100%);
    border-radius: 3px;
}

.speed-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #666;
    margin-bottom: 8px;
    text-align: center;
}

.speed-option label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
    color: #333;
    font-size: 12px;
    text-align: center;
}

/* Close Button */
.close-btn {
    background: white;
    border: 1px solid #d1d5db;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: #000;
    color: white;
}

/* Completion Popup */
.completion-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.completion-popup.show {
    opacity: 1;
    visibility: visible;
}

.completion-popup-content {
    background: white;
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.completion-close-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.completion-close-btn img {
    width: 16px;
    height: 16px;
    filter: brightness(0) saturate(100%);
}

.completion-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #333;
}

.completion-message {
    font-size: 16px;
    color: #666;
    margin-bottom: 24px;
    line-height: 1.5;
}

.completion-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.completion-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.play-again-btn {
    background: #000;
    color: white;
}

.play-again-btn:hover {
    background: #333;
    transform: translateY(-2px);
}

/* Game Container */
.game-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Progress Section */
.progress-section {
    margin-bottom: 32px;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: transparent;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

/* Sentence Info */
.sentence-info {
    text-align: center;
    margin-bottom: 32px;
}

.sentence-number {
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 12px;
}

.sentence-translation {
    font-size: 16px;
    color: #666;
    font-style: italic;
    min-height: 24px;
}

/* Sentence Display Area */
.sentence-display-area {
    background: transparent;
    border: 2px solid #000000;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 32px;
    text-align: center;
    min-height: 120px;
    width: var(--column-width, 800px);
    max-width: 90vw;
    margin-left: auto;
    margin-right: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: text;
    outline: none;
    transition: all 0.3s ease;
}

.sentence-display-area:focus {
    border: none;
    background: transparent;
}

.sentence-text {
    line-height: 1.6;
    color: #333;
    font-weight: 500;
    user-select: none;
    font-size: 12px;
}



/* Game Controls */
.game-controls {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.control-btn {
    padding: 12px 24px;
    background: white;
    border: 2px solid #000;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-btn:hover {
    background: #000;
    color: white;
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .game-container {
        padding: 0 16px;
        margin: 20px auto;
    }
    
    .sentence-display-area {
        padding: 24px;
        min-height: 100px;
    }
    

    
    .typing-input {
        font-size: 20px;
        padding: 12px 16px;
    }
    
    .game-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .control-btn {
        width: 200px;
    }
    
    .navbar-right {
        gap: 8px;
    }
    
    .translation-dropdown,
    .sound-dropdown,
    .autopronounce-dropdown,
    .preference-dropdown {
        min-width: 250px;
        right: -50px;
    }
}

/* Hidden words styling */
.word-blank {
    display: inline-block;
    width: 60px;
    height: 2px;
    background: #000;
    margin: 0 4px;
    vertical-align: middle;
}

.word-blank.filled {
    background: transparent;
    width: auto;
    height: auto;
    border-bottom: 2px solid #000;
    padding-bottom: 2px;
}

/* Character blanks for letter-by-letter typing */
.char-blanks-wrapper {
    display: inline-block;
    margin: 0 2px;
}

.char-blank {
    display: inline-block;
    width: 12px;
    height: 2px;
    background: #000;
    margin: 0 2px;
    vertical-align: middle;
    position: relative;
}

.char-blank.filled {
    background: transparent;
    width: auto;
    height: auto;
    border-bottom: none;
    padding-bottom: 0;
    color: #333;
}

.char-blank.filled.correct {
    color: #333;
}

.char-blank.filled.incorrect {
    color: #dc3545;
}

.char-blank.current {
    background: transparent;
    animation: none;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.5; }
}

/* Word-based display system */
.word {
    display: inline-block;
    margin: 0 2px;
    font-weight: 500;
}

.word.correct {
    color: #000000;
}

.word.incorrect {
    color: #dc3545;
}

.word.current {
    color: #333;
}

.word.blank {
    color: #666;
}

.completed-word {
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.completed-word:hover {
    background-color: #f0f0f0;
    border-radius: 2px;
    padding: 1px 2px;
}

.space-container {
    display: inline-block;
    width: 8px;
    min-height: 1em;
    border: none;
    background: transparent;
    outline: none;
    cursor: text;
    color: transparent;
    caret-color: transparent;
    user-select: none;
}

.space-container:focus {
    outline: none;
    border: none;
    background: transparent;
}

.space-container[contenteditable="true"] {
    outline: none;
    border: none;
    background: transparent;
}

.word-space {
    display: inline-block;
    width: 8px;
}

/* Character display within words */
.char {
    display: inline-block;
    margin: 0 1px;
    min-width: 8px;
    text-align: center;
    font-weight: 500;
}

/* Translation mode dropdown styles */
.translation-mode-dropdown {
    position: relative;
    display: inline-block;
}

.translation-mode-menu {
    position: absolute;
    top: 36px;
    right: 0;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.12);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    padding: 8px 10px;
    width: 280px;
    display: none;
    z-index: 20;
}

.translation-mode-menu.show { 
    display: block; 
}

.translation-mode-menu .menu-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 6px 2px;
}

.translation-mode-menu .menu-row span {
    font-size: 12px;
}

.small-switch {
    position: relative;
    width: 36px;
    height: 20px;
    border-radius: 9999px;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.2);
    cursor: pointer;
    padding: 0;
}

.small-switch .knob {
    position: absolute;
    width: 16px;
    height: 16px;
    left: 2px;
    top: 1px;
    border-radius: 50%;
    background: #9ca3af; /* gray when off */
    transition: transform 0.18s ease, background 0.18s ease;
}

.small-switch[aria-pressed="true"] {
    background: #000; /* black background when enabled */
    border-color: #000;
}

.small-switch[aria-pressed="true"] .knob {
    transform: translateX(16px);
    background: #000; /* black when on */
}

.char.correct {
    color: #333;
}

.char.incorrect {
    color: #dc3545;
}

.char.current {
    background: #000000;
    color: white;
    border-radius: 2px;
    padding: 0 1px;
    text-decoration: none;
}

.char.underscore {
    color: #000000;
    font-weight: normal;
}

.char {
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.char:hover {
    background-color: #f0f0f0;
}

.char.cursor-position {
    background-color: #000000;
    color: white;
    border-radius: 2px;
    padding: 1px 2px;
}



.punctuation {
    color: #333;
    font-weight: normal;
    margin-left: 1px;
}