/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', 'Noto Sans KR', sans-serif;
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
    min-height: 100vh;
    color: #e0e0e0;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Page Transitions */
.page {
    display: none;
    min-height: 100vh;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease-in-out;
}

.page.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Input Page Styles */
.header {
    text-align: center;
    margin-bottom: 50px;
    color: white;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    background: linear-gradient(45deg, #00ffff, #ffffff, #ffd700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

.subtitle {
    font-size: 1.3rem;
    font-weight: 300;
    opacity: 0.9;
    color: #00ffff;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.form-section {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    max-width: 500px;
    margin: 0 auto;
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #00ffff;
    font-size: 1rem;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(0, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: rgba(0, 0, 0, 0.5);
    color: #ffffff;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.input-group select option {
    background: #1a1a2e;
    color: #ffffff;
    border: none;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #00ffff;
    box-shadow: 0 0 0 3px rgba(0, 255, 255, 0.2), 0 0 20px rgba(0, 255, 255, 0.4);
    transform: translateY(-2px);
}

.start-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, #00ffff, #0080ff);
    color: #000000;
    border: none;
    border-radius: 12px;
    font-size: 1.2rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(0, 255, 255, 0.3);
    text-shadow: none;
}

.start-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 12px 25px rgba(102, 126, 234, 0.4);
}

.start-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Game Page Styles */
#gamePage {
    height: 100vh;
    overflow: hidden;
}

#gamePage .container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 15px;
}

.game-header {
    text-align: center;
    margin-bottom: 15px;
    color: #00ffff;
    flex-shrink: 0;
}

.game-header h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

.timer {
    font-size: 1.2rem;
    font-weight: 500;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 255, 255, 0.3);
    padding: 8px 16px;
    border-radius: 25px;
    display: inline-block;
    backdrop-filter: blur(10px);
    color: #00ffff;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
}

.morse-reference {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 255, 255, 0.3);
    padding: 15px;
    border-radius: 15px;
    margin-bottom: 15px;
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.morse-reference h3 {
    margin-bottom: 10px;
    color: #00ffff;
    font-weight: 600;
    font-size: 1rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.morse-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 8px;
}

.morse-item {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 255, 255, 0.2);
    padding: 6px 8px;
    border-radius: 8px;
    text-align: center;
    font-family: 'Courier New', monospace;
    font-weight: 500;
    color: #ffffff;
    font-size: 0.8rem;
    box-shadow: 0 0 5px rgba(0, 255, 255, 0.1);
}

.input-section {
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(0, 255, 255, 0.3);
    padding: 20px;
    border-radius: 20px;
    margin-bottom: 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 15px 35px rgba(0, 255, 255, 0.1);
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.target-text {
    text-align: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
    flex-shrink: 0;
}

.target-text h3 {
    margin-bottom: 8px;
    color: #00ffff;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.target-morse {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    color: #ffd700;
    font-weight: bold;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.input-display {
    margin-bottom: 15px;
    flex-shrink: 0;
}

.current-input,
.current-text {
    margin-bottom: 10px;
}

.current-input label,
.current-text label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #00ffff;
    font-size: 0.9rem;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.morse-display,
.text-display {
    min-height: 40px;
    padding: 12px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    line-height: 1.4;
    word-break: break-all;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.morse-display {
    color: #ffd700;
    font-weight: bold;
    letter-spacing: 1px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.text-display {
    color: #00ff00;
    font-weight: 600;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
}

.touch-area {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 2px solid rgba(0, 255, 255, 0.3);
    color: #00ffff;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    margin-bottom: 15px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 255, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.touch-area:hover {
    transform: scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 255, 255, 0.3);
    border-color: #00ffff;
}

.touch-area:active {
    transform: scale(0.98);
}

.touch-area.active {
    background: linear-gradient(135deg, #ffd700, #ff8f00);
    color: #000000;
    border-color: #ffd700;
    transform: scale(0.95);
    box-shadow: inset 0 5px 15px rgba(0,0,0,0.2), 0 0 20px rgba(255, 215, 0, 0.5);
}

.touch-area p {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 15px;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.touch-area.active p {
    text-shadow: none;
}

.instructions {
    font-size: 0.8rem;
    opacity: 0.9;
    line-height: 1.4;
}

.instructions div {
    margin-bottom: 3px;
}

.progress {
    margin-top: 15px;
    flex-shrink: 0;
}

.progress-bar {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 255, 255, 0.3);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    background: linear-gradient(90deg, #00ff00, #00ffff);
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.progress-text {
    text-align: center;
    font-weight: 500;
    color: #00ffff;
    font-size: 0.9rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.reset-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #ff4444, #cc0000);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(255, 68, 68, 0.3);
}

.reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 68, 68, 0.4);
}

/* Score Page Styles */
.score-header {
    text-align: center;
    margin-bottom: 40px;
    color: #00ffff;
}

.score-header h2 {
    font-size: 3rem;
    margin-bottom: 15px;
    text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    background: linear-gradient(45deg, #00ffff, #ffd700);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.score-header p {
    color: #00ffff;
    font-size: 1.2rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.score-card {
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.3);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.user-info {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 2px solid #e9ecef;
}

.user-info h3 {
    font-size: 1.8rem;
    color: #00ffff;
    margin-bottom: 5px;
    text-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

.user-info p {
    color: #ffd700;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.score-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.score-item {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.1);
}

.score-label {
    display: block;
    font-weight: 500;
    color: #00ffff;
    margin-bottom: 8px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.score-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #ffd700;
    text-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
}

.ranking-preview {
    margin-bottom: 30px;
}

.ranking-preview h3 {
    margin-bottom: 15px;
    color: #00ffff;
    font-size: 1.3rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.ranking-list {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 10px;
    padding: 15px;
}

.ranking-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    color: #ffffff;
}

.ranking-item:last-child {
    border-bottom: none;
}

.ranking-item.user-rank {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.2), rgba(255, 215, 0, 0.2));
    border-radius: 8px;
    font-weight: bold;
    border: 2px solid #00ffff;
    margin: 5px 0;
    padding: 15px 10px;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.ranking-rank {
    font-weight: 700;
    color: #ffd700;
    width: 30px;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.ranking-name {
    flex: 1;
    margin: 0 15px;
    font-weight: 500;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.country-flag {
    font-size: 1.2em;
    margin-right: 5px;
}

.ranking-time {
    font-family: 'Courier New', monospace;
    color: #00ffff;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.play-again-btn,
.share-btn {
    padding: 15px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.play-again-btn {
    background: linear-gradient(135deg, #00ff00, #00cc00);
    color: #000000;
    box-shadow: 0 4px 15px rgba(0, 255, 0, 0.3);
}

.share-btn {
    background: linear-gradient(135deg, #00ffff, #0080ff);
    color: #000000;
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.3);
}

.play-again-btn:hover,
.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    #gamePage .container {
        padding: 10px;
    }
    
    .title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .form-section {
        padding: 25px;
    }
    
    .input-section {
        padding: 15px;
    }
    
    .morse-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 6px;
    }
    
    .morse-item {
        padding: 4px 6px;
        font-size: 0.7rem;
    }
    
    .touch-area {
        padding: 20px 15px;
    }
    
    .touch-area p {
        font-size: 1rem;
        margin-bottom: 10px;
    }
    
    .instructions {
        font-size: 0.7rem;
    }
    
    .score-info {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .score-value {
        font-size: 1.5rem;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .game-header h2 {
        font-size: 1.5rem;
    }
    
    .timer {
        font-size: 1rem;
        padding: 6px 12px;
    }
    
    .morse-reference {
        padding: 12px;
        margin-bottom: 12px;
    }
    
    .morse-reference h3 {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
}

@media (max-width: 480px) {
    #gamePage .container {
        padding: 8px;
        height: 100vh;
    }
    
    .title {
        font-size: 2rem;
    }
    
    .form-section {
        padding: 20px;
    }
    
    .input-section {
        padding: 12px;
    }
    
    .score-card {
        padding: 25px;
    }
    
    .touch-area {
        padding: 15px 10px;
    }
    
    .touch-area p {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }
    
    .instructions {
        font-size: 0.65rem;
    }
    
    .instructions div {
        margin-bottom: 2px;
    }
    
    .morse-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 4px;
    }
    
    .morse-item {
        padding: 3px 4px;
        font-size: 0.65rem;
    }
    
    .target-morse {
        font-size: 0.8rem;
        word-break: break-all;
    }
    
    .morse-display,
    .text-display {
        min-height: 35px;
        padding: 10px;
        font-size: 0.9rem;
    }
    
    .game-header h2 {
        font-size: 1.3rem;
        margin-bottom: 8px;
    }
    
    .timer {
        font-size: 0.9rem;
        padding: 5px 10px;
    }
    
    .morse-reference {
        padding: 10px;
        margin-bottom: 10px;
    }
    
    .morse-reference h3 {
        font-size: 0.8rem;
        margin-bottom: 6px;
    }
    
    .reset-btn {
        padding: 10px;
        font-size: 0.9rem;
    }
}

/* Animations */
/* Success and Error Effects - 완전히 새로운 실시간 제어 방식 */
:root {
    --glow-opacity: 0;
    --glow-intensity: 0;
    --glow-color-r: 0;
    --glow-color-g: 255;
    --glow-color-b: 0;
}

.screen-flash {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: var(--glow-opacity);
    
    /* 사각형 테두리 제거하고 자연스러운 빛 효과로 교체 */
    border: none;
    border-radius: 0;
    
    /* 화면 가장자리에서 안쪽으로 퍼지는 빛 효과 - 세기 강화 */
    background: 
        /* 상단 빛 - 더 강하게 */
        radial-gradient(ellipse 100% calc(var(--glow-intensity) * 75px) at 50% 0%, 
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.95)) 0%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.65)) 25%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.25)) 50%,
            transparent 100%),
        /* 하단 빛 - 더 강하게 */
        radial-gradient(ellipse 100% calc(var(--glow-intensity) * 75px) at 50% 100%, 
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.95)) 0%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.65)) 25%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.25)) 50%,
            transparent 100%),
        /* 좌측 빛 - 더 강하게 */
        radial-gradient(ellipse calc(var(--glow-intensity) * 75px) 100% at 0% 50%, 
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.95)) 0%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.65)) 25%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.25)) 50%,
            transparent 100%),
        /* 우측 빛 - 더 강하게 */
        radial-gradient(ellipse calc(var(--glow-intensity) * 75px) 100% at 100% 50%, 
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.95)) 0%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.65)) 25%,
            rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.25)) 50%,
            transparent 100%);
    
    /* 외부 빛 확산 효과 - 세기 강화 */
    box-shadow: 
        /* 화면 밖으로 퍼지는 빛 - 더 강하게 */
        0 0 calc(var(--glow-intensity) * 100px) calc(var(--glow-intensity) * 30px) rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.8)),
        0 0 calc(var(--glow-intensity) * 200px) calc(var(--glow-intensity) * 60px) rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.5)),
        0 0 calc(var(--glow-intensity) * 300px) calc(var(--glow-intensity) * 90px) rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.25)),
        0 0 calc(var(--glow-intensity) * 400px) calc(var(--glow-intensity) * 120px) rgba(var(--glow-color-r), var(--glow-color-g), var(--glow-color-b), calc(var(--glow-opacity) * 0.12));
    
    transition: none;
}

.text-char {
    display: inline-block;
    width: auto;
    min-width: 0.6em;
    text-align: center;
    transition: all 0.3s ease;
    font-family: 'Courier New', monospace;
    letter-spacing: 0.1em;
}

.text-char.correct {
    color: #00ff00;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.8);
    animation: correctPulse 0.5s ease-out;
}

.text-char.incorrect {
    color: #ff0000;
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.8);
    animation: incorrectShake 0.5s ease-out;
    background: rgba(255, 0, 0, 0.1);
    padding: 2px 4px;
    border-radius: 4px;
    margin: 0 1px;
}

.text-char.pending {
    color: #ffffff;
    opacity: 0.5;
}

.text-char.space {
    min-width: 1em;
}

@keyframes correctPulse {
    0% { 
        transform: scale(1);
        text-shadow: 0 0 10px rgba(0, 255, 0, 0.8);
    }
    50% { 
        transform: scale(1.2);
        text-shadow: 0 0 20px rgba(0, 255, 0, 1);
    }
    100% { 
        transform: scale(1);
        text-shadow: 0 0 10px rgba(0, 255, 0, 0.8);
    }
}

@keyframes incorrectShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-3px); }
    20%, 40%, 60%, 80% { transform: translateX(3px); }
}

.input-section.success-glow {
    border-color: #00ff00;
    box-shadow: 0 0 30px rgba(0, 255, 0, 0.5), inset 0 0 20px rgba(0, 255, 0, 0.1);
    animation: successGlow 0.8s ease-out;
}

.input-section.error-glow {
    border-color: #ff0000;
    box-shadow: 0 0 30px rgba(255, 0, 0, 0.5), inset 0 0 20px rgba(255, 0, 0, 0.1);
    animation: errorGlow 0.8s ease-out;
}

@keyframes successGlow {
    0% { 
        border-color: rgba(0, 255, 255, 0.3);
        box-shadow: 0 15px 35px rgba(0, 255, 255, 0.1);
    }
    50% { 
        border-color: #00ff00;
        box-shadow: 0 0 40px rgba(0, 255, 0, 0.8), inset 0 0 30px rgba(0, 255, 0, 0.2);
    }
    100% { 
        border-color: rgba(0, 255, 255, 0.3);
        box-shadow: 0 15px 35px rgba(0, 255, 255, 0.1);
    }
}

@keyframes errorGlow {
    0% { 
        border-color: rgba(0, 255, 255, 0.3);
        box-shadow: 0 15px 35px rgba(0, 255, 255, 0.1);
    }
    50% { 
        border-color: #ff0000;
        box-shadow: 0 0 40px rgba(255, 0, 0, 0.8), inset 0 0 30px rgba(255, 0, 0, 0.2);
    }
    100% { 
        border-color: rgba(0, 255, 255, 0.3);
        box-shadow: 0 15px 35px rgba(0, 255, 255, 0.1);
    }
}

@keyframes titleGlow {
    0% { 
        text-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    }
    100% { 
        text-shadow: 0 0 30px rgba(0, 255, 255, 0.8), 0 0 40px rgba(255, 215, 0, 0.3);
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.touch-area.pulse {
    animation: pulse 0.3s ease-in-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page.active {
    animation: fadeInUp 0.4s ease-out;
}

/* Success Animation */
@keyframes success {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.text-display.complete {
    animation: success 0.5s ease-in-out;
    background: linear-gradient(135deg, #00ff00, #00ffff);
    color: #000000;
    border-color: #00ff00;
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.5);
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
.start-btn:focus,
.reset-btn:focus,
.play-again-btn:focus,
.share-btn:focus {
    outline: 3px solid #00ffff;
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(0, 255, 255, 0.3);
}

.input-group input:focus,
.input-group select:focus {
    outline: 3px solid #00ffff;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .title {
        color: #00ffff;
        text-shadow: 0 0 10px #00ffff;
    }
    
    .touch-area {
        border: 3px solid #00ffff;
    }
    
    body {
        background: #000000;
    }
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}