/* Custom styles for Kana Trainer - Dark Theme */

/* Color Palette - Centralized theme colors */
:root {
    /* Primary colors */
    --color-bg-primary: #131f24;
    --color-bg-secondary: #202f36;
    --color-bg-tertiary: #37464f;
    
    /* Text colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #d1d5db;
    --color-text-tertiary: #9ca3af;
    
    /* Accent colors */
    --color-accent-blue: #49c0f8;
    --color-accent-blue-hover: #3ba8e0;
    --color-accent-green: #93d333;
    --color-accent-green-hover: #79b933;
    
    /* Status colors */
    --color-error: #f44646;
    --color-error-hover: #d32f2f;
    --color-warning: #f59e0b;
    --color-warning-hover: #fbbf24;
    
    /* Border colors */
    --color-border-primary: #37464f;
    --color-border-accent-blue: #49c0f8;
    --color-border-accent-green: #93d333;
    --color-border-error: #d32f2f;
    
    /* Interactive states */
    --color-hover-overlay: rgba(255, 255, 255, 0.1);
    --color-disabled: #37464f;
    --color-disabled-text: #9ca3af;
    
    /* Shadows and effects */
    --shadow-default: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-progress: 2px 0 4px rgba(0, 0, 0, 0.2);
    
    /* Animation values */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Animation durations (for use with animation property) */
    --duration-fast: 0.2s;
    --duration-medium: 0.3s;
    --duration-slow: 0.5s;
}

* {
    -webkit-tap-highlight-color: transparent;
}

/* Base styles */
body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-bg-primary) !important;
    color: var(--color-text-primary);
}

/* Button text styling */
button {
    font-family: 'Quicksand', sans-serif !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
}

/* Preserve Japanese text formatting */
.japanese-text {
    font-family: 'Noto Sans JP', sans-serif !important;
    text-transform: none !important;
}

.option-btn {
    font-family: 'Noto Sans JP', sans-serif !important;
    text-transform: none !important;
}

/* Mic button text styling */
#mic-text {
    font-size: 1rem !important;
}

/* Typography */
.japanese-text {
    font-family: 'Noto Sans JP', sans-serif;
    font-feature-settings: 'kern' 1;
    text-rendering: optimizeLegibility;
    white-space: nowrap;
}

#kana-display {
    font-feature-settings: 'kern' 1;
    text-rendering: optimizeLegibility;
    white-space: nowrap;
}

/* Color palette classes */
.bg-dark-primary {
    background-color: var(--color-bg-primary);
}

.bg-dark-secondary {
    background-color: var(--color-bg-secondary);
}

.border-dark-primary {
    border-color: var(--color-border-primary);
}

.border-accent-green {
    border-color: var(--color-border-accent-green);
}

.border-accent-dark-green {
    border-color: var(--color-accent-green-hover);
}

.bg-accent-green {
    background-color: var(--color-accent-green);
}

.bg-accent-dark-green {
    background-color: var(--color-accent-green-hover);
}

.text-accent-blue {
    color: var(--color-accent-blue);
}

.border-accent-blue {
    border-color: var(--color-border-accent-blue);
}

.bg-accent-blue {
    background-color: var(--color-accent-blue);
}

.bg-error {
    background-color: var(--color-error);
}

.border-error {
    border-color: var(--color-border-error);
}

.text-error {
    color: var(--color-error);
}

/* Base component styles */
.card {
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    border-width: 2px;
    border-style: solid;
    border-radius: 0.5rem;
    padding: 2rem;
}

.card-header {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-primary);
}

/* Button base styles */
.btn-base {
    transition: all var(--transition-fast);
    border-width: 2px;
    border-style: solid;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-base:hover {
    transform: translateY(-1px);
}

.btn-base:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Primary button styles */
.btn-primary {
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    color: var(--color-text-secondary);
}

.btn-primary:hover {
    background-color: var(--color-bg-secondary);
}

.btn-primary-selected {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-accent-green);
    color: var(--color-text-primary);
}

/* Success button styles */
.btn-success {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    color: var(--color-text-primary);
}

.btn-success:hover {
    background-color: var(--color-accent-green-hover);
}

.btn-success-dark {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    color: var(--color-bg-primary);
}

.btn-success-dark:hover {
    background-color: var(--color-accent-green-hover);
}

/* Accent button styles */
.btn-accent {
    background-color: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
    color: var(--color-bg-primary);
}

/* Session option buttons */
.session-option-btn {
    transition: all var(--transition-fast);
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    border-width: 2px;
    color: var(--color-text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
}

.session-option-btn:hover {
    background-color: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.session-option-btn.selected {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-accent-green);
    color: var(--color-text-primary);
}

/* Addon toggle containers */
.addon-toggles {
    margin-top: 1.5rem;
}

/* Disabled state for addon toggles */
#dakuten-toggle.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#yoon-toggle.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Disabled state for session option buttons */
.session-option-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Addon toggle active states */
#dakuten-checkbox:checked + .addon-toggle-slider {
    background-color: var(--color-accent-blue);
}

#yoon-checkbox:checked + .addon-toggle-slider {
    background-color: var(--color-accent-blue);
}

/* Listen mode positioning - move container up by 20% */
#listen-mode-content:not(.hidden) {
    transform: translateY(-10vh);
}

/* Speak mode positioning - move container up by 20% */
#speak-mode-content:not(.hidden) {
    transform: translateY(-10vh);
}

/* Word progress display */
#word-progress-display {
    position: absolute;
    top: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 15;
    width: 100%;
    max-width: 600px;
    text-align: center;
}

#word-display {
    font-family: var(--font-japanese);
    letter-spacing: normal;
    text-align: center;
    display: block;
    width: 100%;
    line-height: 1.2;
}

/* Character slots for word mode */
.character-slot {
    width: 3rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.character-placeholder {
    width: 1rem;
    height: 1rem;
    background-color: white;
    border-radius: 0.25rem;
    transition: transform 0.3s ease-out;
    position: absolute;
}

.character-content {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-japanese);
    color: var(--color-text-primary);
    transition: transform 0.3s ease-out;
    transform: scale(0);
    position: absolute;
}

.character-content.revealed {
    transform: scale(1);
}

.character-placeholder.hidden {
    transform: scale(0);
}



#word-translation {
    color: var(--color-accent-blue);
    font-weight: 600;
}

.word-completion-animation {
    animation: wordCompletionBounce 1s ease-out;
}

@keyframes wordCompletionBounce {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Option buttons for listening mode */
.option-btn {
    font-feature-settings: 'kern' 1;
    text-rendering: optimizeLegibility;
    transition: all var(--transition-fast);
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    border-width: 2px;
    color: var(--color-text-secondary);
    height: 6rem;
    border-radius: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Noto Sans JP', sans-serif;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.option-btn:hover:not(:disabled) {
    background-color: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.option-btn.selected {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-accent-green);
    color: var(--color-text-primary);
}

.option-btn.correct {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    color: var(--color-text-primary);
}

.option-btn.correct .option-romaji {
    color: var(--color-text-primary);
}

.option-btn.incorrect {
    background-color: var(--color-error);
    border-color: var(--color-error-hover);
    color: var(--color-text-primary);
}

.option-btn:disabled {
    cursor: not-allowed;
}

/* Debug log for admin mode */
.debug-log {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background-color: rgba(55, 65, 81, 0.8);
    border: 1px solid rgba(107, 114, 128, 0.4);
    border-radius: 0.5rem;
    font-family: 'SF Mono', Consolas, 'Monaco', 'Inconsolata', 'Fira Code', monospace;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
}

.debug-log-content {
    text-align: left;
}

/* Option button content styling */
.option-kana {
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Noto Sans JP', sans-serif;
    white-space: nowrap;
}

.option-romaji {
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

/* Speak mode button styles */
.speak-btn {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 16px;
    gap: 8px;
    transition: all var(--transition-fast);
    border: 2px solid var(--color-border-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-accent-blue);
    cursor: pointer;
    border-radius: 0.5rem;
}

.speak-btn:hover {
    background-color: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.speak-btn.recording {
    background-color: transparent !important;
    border-color: var(--color-border-primary) !important;
    color: var(--color-accent-blue);
    cursor: not-allowed;
}

.speak-btn.processing {
    background-color: transparent !important;
    border-color: var(--color-border-primary) !important;
    color: var(--color-accent-blue);
    cursor: not-allowed;
}

.speak-btn.success {
    background-color: var(--color-bg-secondary) !important;
    border-color: var(--color-accent-green) !important;
    color: var(--color-accent-green);
    cursor: default;
    pointer-events: none;
}

.speak-btn.success:hover {
    background-color: var(--color-bg-secondary) !important;
    transform: none;
}

.speak-btn.error {
    background-color: var(--color-error) !important;
    border-color: var(--color-error-hover) !important;
    color: var(--color-text-primary);
}

.speak-btn.error:hover {
    background-color: var(--color-error-hover) !important;
    transform: translateY(-1px);
}

/* Play button styles */
.play-btn {
    width: 6rem;
    height: 6rem;
    border-radius: 0.75rem;
    background-color: var(--color-accent-blue);
    border-color: var(--color-accent-blue);
    border-width: 2px;
    color: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.play-btn:hover:not(:disabled) {
    background-color: var(--color-accent-blue-hover);
    border-color: var(--color-accent-blue-hover);
    transform: translateY(-2px);
}

.play-btn:disabled {
    cursor: not-allowed;
}

/* Hint audio button */
.hint-audio-btn {
    width: 4rem;
    height: 60px;
    border-radius: 0.5rem;
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    border-width: 2px;
    color: var(--color-accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    cursor: pointer;
    font-weight: 500;
}

.hint-audio-btn:hover:not(:disabled) {
    background-color: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.hint-audio-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Mode toggle buttons */
#speak-mode, #listen-mode {
    transition: all var(--transition-fast);
}

#speak-mode.active {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    color: var(--color-text-primary);
}

#listen-mode.active {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    color: var(--color-text-primary);
}

/* Character audio button */
.character-audio-btn {
    background-color: transparent;
    border: none;
    color: var(--color-accent-blue);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0.5rem;
    border-radius: 50%;
}

.character-audio-btn:hover {
    background-color: rgba(73, 192, 248, 0.1);
    transform: scale(1.1);
}

.character-audio-btn:active {
    transform: scale(0.95);
}

/* Character display container for speaking mode */
.character-display-container {
    background-color: var(--color-bg-primary);
    border-radius: 0.5rem;
    padding: 1rem;
    display: inline-block;
    margin: 0 auto;
}

/* Speak button container */
.speak-button-container {
    margin-top: 1.5rem;
    padding: 0;
    width: 100%;
}

/* Full width speak button */
.speak-btn-full {
    height: 96px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 16px;
    transition: all var(--transition-fast);
    border: 2px solid var(--color-border-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-accent-blue);
    cursor: pointer;
    border-radius: 0.5rem;
    position: relative;
}

.speak-btn-full:hover {
    background-color: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.speak-btn-full.recording {
    background-color: transparent !important;
    border-color: var(--color-border-primary) !important;
    color: var(--color-accent-blue);
    cursor: not-allowed;
}

.speak-btn-full.processing {
    background-color: transparent !important;
    border-color: var(--color-border-primary) !important;
    color: var(--color-accent-blue);
    cursor: not-allowed;
    position: relative;
    overflow: hidden;
}

.speak-btn-full.processing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background-color: rgba(126, 214, 255, 0.05);
    transition: none;
    z-index: 0;
}

.speak-btn-full.processing.animate-progress::before {
    animation: progress-fill var(--progress-duration, 2s) linear forwards;
}

@keyframes progress-fill {
    from { width: 0%; }
    to { width: 100%; }
}

.speak-btn-content {
    position: relative;
    z-index: 1;
}

.speak-btn-full.success {
    background-color: var(--color-bg-secondary) !important;
    border-color: var(--color-accent-green) !important;
    color: var(--color-accent-green);
    cursor: default;
    pointer-events: none;
}

.speak-btn-full.success:hover {
    background-color: var(--color-bg-secondary) !important;
    transform: none;
}

.speak-btn-full.error {
    background-color: var(--color-error) !important;
    border-color: var(--color-error-hover) !important;
    color: var(--color-bg-primary) !important;
}

.speak-btn-full.error .text-accent-blue {
    color: var(--color-bg-primary) !important;
}

.speak-btn-full.error:hover {
    background-color: var(--color-error-hover) !important;
    transform: translateY(-1px);
}

/* Speak button content (icon + text) */
.speak-btn-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

/* Audio visualizer */
.audio-visualizer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    height: 48px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
}

.audio-bar {
    width: 6px;
    background-color: var(--color-accent-blue);
    border-radius: 3px;
    transition: height 0.1s ease;
    height: 8px;
    min-height: 8px;
}

.audio-bar.active {
    animation: audioBarPulse 0.5s ease-in-out infinite alternate;
}

@keyframes audioBarPulse {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

/* Animations */
@keyframes processingPulse {
    0% { 
        background-color: var(--color-warning);
        transform: scale(1);
    }
    50% { 
        background-color: var(--color-warning-hover);
        transform: scale(1.02);
    }
    100% { 
        background-color: var(--color-warning);
        transform: scale(1);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(244, 70, 70, 0.7);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(244, 70, 70, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(244, 70, 70, 0);
    }
}

/* Feedback animations */
#feedback-overlay {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.feedback-enter {
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Bottom confirmation area */
#continue-btn {
    transition: all var(--transition-medium);
    z-index: 20;
}

/* Feedback backpanel */
#continue-feedback-panel {
    background-color: var(--color-bg-secondary);
    animation: slideUpFromBottom var(--duration-slow) cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 10;
    min-height: 200px;
    bottom: -50px;
}

#continue-feedback-text {
    opacity: 0;
    animation: fadeInText 0.4s ease-out 0.4s forwards;
    margin-top: 1rem;
}

/* Error state for feedback text */
#continue-feedback-text.text-error {
    color: var(--color-error) !important;
}

@keyframes slideUpFromBottom {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeInText {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#continue-btn button {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    border-width: 2px;
    color: var(--color-bg-primary) !important;
    transition: all var(--transition-fast);
}

#continue-btn button:hover {
    background-color: var(--color-accent-green-hover);
    transform: translateY(-1px);
}

/* Disabled state for continue button */
#continue-btn button.btn-disabled {
    background-color: var(--color-disabled);
    border-color: var(--color-disabled);
    color: var(--color-disabled-text) !important;
    cursor: not-allowed;
}

#continue-btn button.btn-disabled:hover {
    background-color: var(--color-disabled);
    transform: none;
}

/* Error state for continue button */
#continue-btn button.btn-error {
    background-color: var(--color-error);
    border-color: var(--color-error-hover);
    color: var(--color-text-primary) !important;
}

#continue-btn button.btn-error:hover {
    background-color: var(--color-error-hover);
    transform: translateY(-1px);
}

/* Session complete button */
#session-complete-btn {
    /* No background or border - clean floating button */
}

#session-complete-btn button {
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    border-width: 2px;
    color: var(--color-bg-primary) !important;
    transition: all var(--transition-fast);
}

#session-complete-btn button:hover {
    background-color: var(--color-accent-green-hover);
    transform: translateY(-1px);
}

/* Settings modal */
#settings-modal {
    z-index: 50;
}

.settings-modal-container {
    background-color: var(--color-bg-primary);
    padding: 1.5rem;
    max-width: 100%;
    width: 100%;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
}

/* Romaji toggle styling */
#romaji-toggle:checked + .romaji-toggle-slider {
    background-color: var(--color-accent-blue);
}

/* Mobile optimizations */
@media (max-width: 640px) {
    #kana-display {
        font-size: 5rem;
    }
    
    .option-btn {
        font-size: 1.5rem;
    }
    
    .speak-btn-full {
        height: 96px;
        font-size: 18px;
    }
    
    #mic-status {
        font-size: 14px;
        margin-top: 16px;
    }
}

/* Audio playback animation for play button */
.play-btn.playing {
    animation: borderGrow 1.5s linear forwards;
}

@keyframes borderGrow {
    0% {
        box-shadow: 0 0 0 0 rgba(73, 192, 248, 0);
        border-color: var(--color-accent-blue);
    }
    25% {
        box-shadow: 0 0 0 3px rgba(73, 192, 248, 1);
        border-color: var(--color-accent-blue-hover);
    }
    100% {
        box-shadow: 0 0 0 12px rgba(73, 192, 248, 0);
        border-color: var(--color-accent-blue);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    .audio-bar {
        animation: none !important;
    }
    
    #mic-button {
        animation: none !important;
    }
}

/* Focus and active states for keyboard navigation */
.option-btn:focus:not(.selected):not(.correct):not(.incorrect) {
    outline: none;
}

.option-btn.selected:focus,
.option-btn.correct:focus,
.option-btn.incorrect:focus,
.option-btn:active {
    outline: none;
}

.session-option-btn:focus:not(.selected) {
    outline: none;
}

.session-option-btn.selected:focus,
.session-option-btn:active {
    outline: none;
}

.speak-btn:focus:not(.success):not(.error):not(.recording):not(.processing),
.speak-btn-full:focus:not(.success):not(.error):not(.recording):not(.processing) {
    outline: none;
}

.speak-btn.success:focus,
.speak-btn.error:focus,
.speak-btn.recording:focus,
.speak-btn.processing:focus,
.speak-btn:active,
.speak-btn-full.success:focus,
.speak-btn-full.error:focus,
.speak-btn-full.recording:focus,
.speak-btn-full.processing:focus,
.speak-btn-full:active {
    outline: none;
}

/* Remove outline for all button active states */
button:active {
    outline: none;
}

/* Settings button and progress bar */
#settings-btn:hover {
    color: var(--color-text-secondary);
}

/* Start session button */
#start-session:hover {
    background-color: var(--color-accent-green-hover);
    transform: translateY(-1px);
}

/* Progress bar animation */
#progress-bar {
    height: 16px !important; /* Increased from 12px */
    position: relative;
}

#progress-fill {
    transition: width var(--duration-slow) ease-in-out;
    position: relative;
    /* Add drop shadow on the right side */
    box-shadow: var(--shadow-progress);
}

/* Add shine effect to progress fill */
#progress-fill::before {
    content: '';
    position: absolute;
    top: 4px;
    left: 8px;
    right: 8px;
    height: 5px;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.3) 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        rgba(255, 255, 255, 0.3) 100%);
    border-radius: 2px;
    pointer-events: none;
}

/* Session info */
#session-info {
    font-weight: 500;
}

/* Retry mode indicator - removed */

/* Text styling utilities */
.text-feedback-success {
    color: var(--color-accent-green);
    font-weight: 500;
}

.text-feedback-error {
    color: var(--color-error);
    font-weight: 500;
}

.text-feedback-neutral {
    color: var(--color-text-tertiary);
    font-weight: 500;
}

/* Interactive state utilities */
.interactive-disabled {
    cursor: not-allowed;
}

.interactive-hidden {
    opacity: 0;
    pointer-events: none;
}

/* Layout utilities */
.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.button-container {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 1rem;
}

/* Grid layouts */
.grid-3-cols {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.grid-2-cols {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

/* Spacing utilities */
.space-y-6 > * + * {
    margin-top: 1.5rem;
}

.space-y-4 > * + * {
    margin-top: 1rem;
}

.space-y-3 > * + * {
    margin-top: 0.75rem;
}

/* Reward page styles */
.reward-page-container {
    padding: 2rem;
    margin-top: 2rem;
}

.reward-icon {
    width: 6rem;
    height: 6rem;
    margin: 0 auto 1.5rem auto;
    border-radius: 50%;
    background-color: var(--color-accent-green);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px) scale(0.8);
}

.reward-icon.animate-star-entrance {
    animation: starEntrance 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

.reward-icon svg {
    width: 3rem;
    height: 3rem;
    color: var(--color-text-primary);
}

.reward-title {
    font-family: 'Quicksand', sans-serif;
    font-weight: 700;
    font-size: 2.5rem;
    color: var(--color-text-primary);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out 0.4s forwards;
}

.session-stats {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    line-height: 1.75;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease-out 0.8s forwards;
}

.session-stats div {
    margin-bottom: 0.5rem;
}

@keyframes starEntrance {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.8) rotate(-10deg);
    }
    50% {
        opacity: 1;
        transform: translateY(-10px) scale(1.1) rotate(5deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0deg);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Feedback overlay styles */
.feedback-overlay-content {
    background-color: var(--color-bg-primary);
    border-color: var(--color-border-primary);
    border-width: 2px;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
}

.feedback-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem auto;
}

/* Main menu styles */
.main-menu-container {
    background-color: var(--color-bg-primary);
    border-color: transparent;
    border-width: 0;
    border-radius: 0.5rem;
    padding: 0;
    text-align: center;
    width: 100%;
}

.main-menu-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 2rem;
    font-family: 'Noto Sans JP', sans-serif;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
}

/* Start session button specific styles */
.start-session-btn {
    width: 100%;
    margin-top: 2rem;
    padding: 1rem;
    color: var(--color-bg-primary);
    font-weight: 500;
    border-radius: 0.75rem;
    font-size: 1rem;
    transition: all var(--transition-fast);
    background-color: var(--color-accent-green);
    border-color: var(--color-accent-green-hover);
    border-width: 2px;
    border-style: solid;
    cursor: pointer;
}

.start-session-btn:hover {
    background-color: var(--color-accent-green-hover);
    transform: translateY(-1px) scale(1.05);
}

/* Word Service Loading and Error States */
.loading-overlay, .error-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-content, .error-modal {
    background: var(--color-bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    max-width: 400px;
    margin: 1rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top: 3px solid var(--color-accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    color: var(--color-text-secondary);
    margin: 0;
    font-size: 0.9rem;
}

.error-content h3 {
    color: var(--color-error);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.error-content p {
    color: var(--color-text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.5;
    font-size: 0.9rem;
}

.error-button {
    background: var(--color-accent-blue);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.error-button:hover {
    background: var(--color-accent-blue-dark);
}