/* Morse Hero Base Styles */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #f39c12;
    --secondary-dark: #e67e22;
    --accent-color: #e74c3c;
    --accent-dark: #c0392b;
    --success-color: #2ecc71;
    --success-dark: #27ae60;
    --bg-dark: #2c3e50;
    --bg-darker: #1a2530;
    --bg-light: #34495e;
    --text-light: #ecf0f1;
    --text-dim: rgba(255, 255, 255, 0.7);
    --border-radius-sm: 12px;
    --border-radius-md: 20px;
    --border-radius-lg: 30px;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 15px 30px rgba(0, 0, 0, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --card-bg: rgba(52, 73, 94, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --header-height: 70px;
    --footer-height: 100px;
    --glow-color: rgba(243, 156, 18, 0.6);
}

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

body {
    font-family: 'Poppins', 'Fredoka', sans-serif;
    margin: 0;
    padding: 0;
    background: radial-gradient(ellipse at top, var(--bg-dark) 0%, var(--bg-darker) 100%);
    background-attachment: fixed;
    color: var(--text-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/img/morse-pattern.svg') repeat;
    opacity: 0.03;
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 20px;
    text-align: center;
    width: 100%;
    position: relative;
    z-index: 1;
}

button {
    cursor: pointer;
    font-family: 'Poppins', 'Fredoka', sans-serif;
    transition: all var(--transition-normal);
    font-weight: 600;
    letter-spacing: 1px;
    text-shadow: 1px 1px 0px rgba(0, 0, 0, 0.2);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

button::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

button:hover::after {
    opacity: 1;
}

button:active {
    transform: translateY(2px);
    box-shadow: var(--shadow-sm);
}

.title-link {
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    display: inline-block;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
}

.title-link:hover {
    color: var(--secondary-color);
    text-shadow: 0 0 15px var(--glow-color);
}

.title-link::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--secondary-color);
    transition: width var(--transition-normal);
    box-shadow: 0 0 10px var(--glow-color);
}

.title-link:hover::after {
    width: 80%;
}

.footer {
    margin-top: 60px;
    padding: 40px 20px;
    background: linear-gradient(to top, rgba(26, 37, 48, 0.9), rgba(26, 37, 48, 0.7));
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-unified {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    font-size: 5.5em;
    margin-top: 0.5rem;
    letter-spacing: 2px;
    font-weight: 700;
    text-shadow:
        0 0 15px rgba(231, 76, 60, 0.6),
        3px 3px 0px rgba(192, 57, 43, 0.8);
    cursor: pointer;
    transition: transform 0.2s ease;
    color: var(--secondary-color);
    font-family: 'Fredoka', sans-serif;
    position: relative;
    display: inline-block;
}

h1:hover {
    transform: scale(1.03);
}

h1::after {
    width: 80px;
}

.footer-sections {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    text-align: left;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-light);
    position: relative;
    display: inline-block;
}

.footer-section h3::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-color);
}

.footer-section p {
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.footer-section a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--primary-color);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-section a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* Media queries for responsiveness */
@media (max-width: 768px) {
    .footer-sections {
        flex-direction: column;
        gap: 20px;
    }

    .footer-section {
        min-width: 100%;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content > p {
        max-width: 100%;
    }
}

.game-container {
    background: linear-gradient(145deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: none;
    position: relative;
    overflow: hidden;
}

.game-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 1;
}

.options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}

.start-button {
    background: linear-gradient(145deg, var(--accent-color) 0%, #c0392b 100%);
    color: white;
    border: none;
    padding: 20px 50px;
    font-size: 32px;
    font-weight: 700;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 30px;
    width: 100%;
    max-width: 300px;
    position: relative;
    z-index: 1;
}

.start-button:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(145deg, #e74c3c 0%, var(--accent-color) 100%);
}

.start-button:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.option-button {
    background: linear-gradient(145deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius-md);
    font-size: 36px;
    padding: 25px 15px;
    box-shadow: 0 8px 0 var(--primary-dark),
        var(--shadow-md);
    min-height: 130px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.option-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 13px 0 var(--primary-dark),
        var(--shadow-lg);
}

.option-button:active {
    transform: translateY(3px);
    box-shadow: 0 5px 0 var(--primary-dark),
        var(--shadow-sm);
}

.option-button.correct {
    background: linear-gradient(145deg, var(--success-color), var(--success-dark));
    box-shadow: 0 8px 0 var(--success-dark),
        0 0 30px rgba(46, 204, 113, 0.5);
    animation: pulse 0.5s;
}

.option-button.incorrect {
    background: linear-gradient(145deg, var(--accent-color), var(--accent-dark));
    box-shadow: 0 8px 0 var(--accent-dark),
        0 0 30px rgba(231, 76, 60, 0.5);
    animation: shake 0.5s;
}

.char-display {
    font-size: 38px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.morse-hint {
    display: block;
    font-size: 18px;
    margin-top: 10px;
    color: var(--text-dim);
    font-family: monospace;
    letter-spacing: 2px;
}

.key-label {
    position: absolute;
    top: 8px;
    right: 12px;
    font-size: 14px;
    color: var(--text-dim);
    font-family: monospace;
    background-color: rgba(0, 0, 0, 0.2);
    padding: 2px 8px;
    border-radius: 10px;
}

.key-pressed {
    transform: translateY(3px) !important;
    box-shadow: 0 5px 0 var(--primary-dark) !important;
    transition: transform 0.05s, box-shadow 0.05s;
}

.chart-link {
    margin-top: 20px;
    font-size: 18px;
}

.chart-link a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.chart-link a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.chart-link a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: -2px;
    left: 0;
    background-color: var(--primary-color);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.chart-link a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
    background-color: var(--secondary-color);
}

#startScreen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(145deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
    border-radius: var(--border-radius-lg);
    padding: 40px 30px;
    margin: 40px 0;
    position: relative;
    border: 2px dashed rgba(52, 152, 219, 0.3);
    box-shadow: var(--shadow-md);
}

#startScreen::before {
    content: '';
    position: absolute;
    left: 50%;
    top: -2px;
    transform: translateX(-50%);
    width: 80%;
    height: 4px;
    background: linear-gradient(90deg, rgba(52, 152, 219, 0) 0%, rgba(52, 152, 219, 0.8) 50%, rgba(52, 152, 219, 0) 100%);
    border-radius: 2px;
}

#startScreen p {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 40px;
    text-shadow: var(--text-shadow);
}

#startScreen .chart-link {
    margin-top: 0;
    width: 100%;
    max-width: 300px;
}

#startScreen .chart-link a {
    display: block;
    width: 100%;
    padding: 12px 25px;
    background: linear-gradient(145deg, rgba(52, 152, 219, 0.2) 0%, rgba(52, 152, 219, 0.3) 100%);
    border-radius: var(--border-radius-md);
    color: var(--text-light);
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid rgba(52, 152, 219, 0.3);
    box-shadow: var(--shadow-sm);
    box-sizing: border-box;
}

#startScreen .chart-link a:hover {
    background: linear-gradient(145deg, rgba(52, 152, 219, 0.3) 0%, rgba(52, 152, 219, 0.4) 100%);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    color: var(--primary-color);
    border-color: rgba(52, 152, 219, 0.5);
}

.score-container {
    margin-bottom: 20px;
    width: 100%;
}

.score-widget {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: 15px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

.score-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-right: 15px;
    min-width: 100px;
}

.score-label {
    font-size: 18px;
    margin-bottom: 5px;
    color: var(--text-dim);
}

.score-value {
    font-size: 24px;
    font-weight: bold;
    color: var(--secondary-color);
}

.score-tracker {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    max-width: 100%;
    margin-top: 5px;
}

.score-marker {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin: 2px;
    transition: all 0.3s ease;
}

.score-marker.correct {
    background-color: var(--success-color);
    box-shadow: 0 0 5px rgba(46, 204, 113, 0.7);
}

.score-marker.incorrect {
    background-color: var(--accent-color);
    box-shadow: 0 0 5px rgba(231, 76, 60, 0.7);
}

.score-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin: 2px;
    transition: all 0.3s ease;
}

.score-dot.correct {
    background-color: var(--success-color);
    box-shadow: 0 0 5px rgba(46, 204, 113, 0.7);
}

.score-dot.incorrect {
    background-color: var(--accent-color);
    box-shadow: 0 0 5px rgba(231, 76, 60, 0.7);
}

.feedback {
    height: 40px;
    margin-top: 30px;
    font-weight: bold;
    font-size: 28px;
    color: var(--secondary-color);
    text-shadow: 0 0 10px rgba(243, 156, 18, 0.5);
}

.score {
    font-size: 32px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 30px;
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.3),
        0 0 10px rgba(243, 156, 18, 0.3);
}

.score-display {
    font-size: 24px;
    font-weight: bold;
    margin: 15px 0;
    color: var(--secondary-color);
}

.settings {
    background: linear-gradient(145deg, rgba(52, 73, 94, 0.7) 0%, rgba(44, 62, 80, 0.7) 100%);
    padding: 25px;
    border-radius: var(--border-radius-md);
    margin-top: 30px;
    font-size: 20px;
    border: none;
    box-shadow: var(--shadow-md);
}

.settings label {
    font-size: 20px;
    margin-right: 15px;
    color: var(--primary-color);
    font-weight: 600;
}

.settings select {
    padding: 12px 20px;
    font-size: 18px;
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--primary-dark);
    background-color: rgba(44, 62, 80, 0.7);
    color: var(--text-light);
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.settings select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
}

.settings select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 15px rgba(243, 156, 18, 0.3);
}

.hint-setting {
    display: inline-block;
    margin-left: 30px;
}

.hint-icon {
    display: inline-block;
    margin-right: 8px;
}

.hint-setting input[type="checkbox"] {
    width: 20px;
    height: 20px;
    vertical-align: middle;
    cursor: pointer;
    margin-right: 8px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.control-button {
    background: linear-gradient(145deg, var(--bg-light), #2d3e50);
    color: var(--text-light);
    border-radius: var(--border-radius-sm);
    padding: 12px 25px;
    font-size: 16px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.control-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(145deg, #3a5269, var(--bg-light));
}

.control-button:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm);
}

.play-again-button {
    background: linear-gradient(145deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    border-radius: var(--border-radius-md);
    padding: 15px 30px;
    font-size: 20px;
    margin-top: 20px;
    box-shadow: 0 6px 0 var(--secondary-dark),
        var(--shadow-md);
}

.play-again-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 11px 0 var(--secondary-dark),
        var(--shadow-lg);
}

.play-again-button:active {
    transform: translateY(3px);
    box-shadow: 0 3px 0 var(--secondary-dark),
        var(--shadow-sm);
}

.progress-container {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    height: 10px;
    width: 100%;
    margin: 20px 0;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    height: 100%;
    border-radius: 20px;
    transition: width 0.5s ease;
}

.instructions {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 25px;
    margin-bottom: 30px;
    text-align: left;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.instructions h2 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 24px;
}

.instructions p {
    margin-bottom: 10px;
    font-size: 16px;
    line-height: 1.6;
}

.instructions ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

.instructions li {
    margin-bottom: 5px;
}

@keyframes pulse {
    0% {
        box-shadow: 0 8px 0 var(--success-dark), 0 0 20px rgba(46, 204, 113, 0.5);
    }

    50% {
        box-shadow: 0 8px 0 var(--success-dark), 0 0 40px rgba(46, 204, 113, 0.8);
    }

    100% {
        box-shadow: 0 8px 0 var(--success-dark), 0 0 20px rgba(46, 204, 113, 0.5);
    }
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-10px);
    }

    40%,
    80% {
        transform: translateX(10px);
    }
}

/* Game Area */
#gameArea {
    display: none;
}

/* When game is active, JavaScript will override this */
body.game-active #gameArea {
    display: block;
}

body.game-active #startScreen {
    display: none;
}

@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }

    .game-container {
        padding: 30px 20px;
    }

    .options {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .option-button {
        font-size: 30px;
        padding: 20px 15px;
        min-height: 110px;
    }

    button {
        font-size: 16px;
    }

    .start-button {
        font-size: 28px;
        padding: 15px 40px;
    }

    .score-container {
        flex-direction: column;
        align-items: center;
    }

    .score-widget {
        margin-bottom: 15px;
    }

    .settings-toggle {
        margin-left: 0;
        margin-top: 10px;
    }

    /* Chart specific media queries */
    .morse-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 15px;
    }

    .morse-item {
        padding: 15px 10px;
    }

    .character {
        font-size: 28px;
    }

    .morse {
        font-size: 16px;
    }

    h2 {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px 10px;
    }

    .game-container {
        padding: 25px 15px;
    }

    .option-button {
        font-size: 24px;
        padding: 15px 10px;
        min-height: 90px;
    }

    .start-button {
        font-size: 24px;
        padding: 12px 30px;
    }

    .hint-setting {
        margin-left: 0;
        margin-top: 10px;
    }
}

/* Chart Styles */
.chart-section {
    background: linear-gradient(145deg, var(--bg-light) 0%, #2d3e50 100%);
    border-radius: var(--border-radius-md);
    padding: 30px 25px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.chart-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    z-index: 1;
}

.morse-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 20px;
    margin: 0 auto;
}

.morse-item {
    background: linear-gradient(145deg, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0.2) 100%);
    border-radius: var(--border-radius-sm);
    padding: 20px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid rgba(52, 152, 219, 0.2);
}

.morse-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(145deg, rgba(52, 152, 219, 0.2) 0%, rgba(52, 152, 219, 0.3) 100%);
    border-color: rgba(52, 152, 219, 0.3);
}

.morse-item.playing {
    background: linear-gradient(145deg, rgba(243, 156, 18, 0.2) 0%, rgba(243, 156, 18, 0.3) 100%);
    box-shadow: 0 0 20px rgba(243, 156, 18, 0.4);
    border-color: rgba(243, 156, 18, 0.4);
}

.character {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 10px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

.morse {
    font-family: monospace;
    font-size: 18px;
    letter-spacing: 2px;
    color: var(--text-dim);
}

.back-link {
    margin-top: 40px;
    font-size: 18px;
}

.back-link a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    padding: 10px 20px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    display: inline-block;
}

.back-link a:hover {
    color: var(--secondary-color);
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.back-link a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: 5px;
    left: 0;
    background-color: var(--primary-color);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.back-link a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
    background-color: var(--secondary-color);
}

.option-button {
    background: linear-gradient(145deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius-md);
    font-size: 36px;
    padding: 20px;
    margin: 10px;
    width: calc(50% - 20px);
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-md), inset 0 1px rgba(255, 255, 255, 0.15);
}

.option-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg), inset 0 1px rgba(255, 255, 255, 0.15);
}

.option-button:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm), inset 0 1px rgba(255, 255, 255, 0.15);
}

.option-button.correct {
    background: linear-gradient(145deg, var(--success-color), var(--success-dark));
    animation: correct-pulse 1s infinite;
}

.option-button.incorrect {
    background: linear-gradient(145deg, var(--accent-color), var(--accent-dark));
    animation: incorrect-shake 0.5s;
}

/* Start screen styles */
#startScreen {
    max-width: 600px;
    margin: 0 auto;
    padding: 30px;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.8s ease-out;
}

#startScreen p {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    line-height: 1.6;
}

.start-button {
    background: linear-gradient(145deg, var(--secondary-color), var(--secondary-dark));
    color: white;
    font-size: 1.5rem;
    padding: 15px 40px;
    border-radius: var(--border-radius-md);
    margin: 20px 0;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md), 0 0 15px rgba(243, 156, 18, 0.3);
}

.start-button:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(243, 156, 18, 0.5);
}

.start-button:active {
    transform: translateY(1px);
}

.chart-link {
    margin-top: 20px;
}

.chart-link a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    position: relative;
    padding: 5px 10px;
    border-radius: var(--border-radius-sm);
}

.chart-link a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.chart-link a:hover {
    color: var(--primary-color);
}

.chart-link a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Game area styles */
#gameArea {
    animation: fadeIn 0.5s ease-out;
}

.game-container {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 20px 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

/* Chart page styles */
.chart-section {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 30px 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.5s ease-out;
}

.chart-section h2 {
    margin-bottom: 20px;
    color: var(--secondary-color);
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.chart-section h2::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 3px;
}

/* New animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes correct-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.4);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(46, 204, 113, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
    }
}

@keyframes incorrect-shake {

    0%,
    100% {
        transform: translateX(0);
    }

    20%,
    60% {
        transform: translateX(-5px);
    }

    40%,
    80% {
        transform: translateX(5px);
    }
}

/* Media queries for responsiveness */
@media (max-width: 768px) {
    .title-link {
        font-size: 2.5rem;
    }

    .option-button {
        font-size: 28px;
        height: 100px;
    }

    .chart-section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .title-link {
        font-size: 2rem;
    }

    .option-button {
        font-size: 24px;
        height: 90px;
        width: calc(50% - 10px);
        margin: 5px;
    }

    .start-button {
        font-size: 1.2rem;
        padding: 12px 30px;
    }
}

/* Hero content styles */
.hero-content {
    text-align: center;
}

.hero-content h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.hero-content>p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.feature-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 20px;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.1);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.feature-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* CTA container */
.cta-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin: 30px 0;
}

.button-morse {
    display: block;
    font-size: 0.8rem;
    margin-top: 5px;
    opacity: 0.8;
}

.how-to-play-button {
    background: transparent;
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.how-to-play-button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* How to play section */
.how-to-play {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 20px;
    margin: 20px 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeIn 0.5s ease-out;
}

.how-to-play h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.how-to-play ol {
    text-align: left;
    padding-left: 30px;
    margin-bottom: 20px;
}

.how-to-play li {
    margin-bottom: 10px;
    color: var(--text-light);
}

.morse-fact {
    background: rgba(52, 152, 219, 0.1);
    border-radius: var(--border-radius-sm);
    padding: 15px;
    border-left: 3px solid var(--primary-color);
    text-align: left;
}

.morse-fact h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.morse-fact p {
    font-size: 0.9rem;
    color: var(--text-dim);
}

/* Game instructions */
.game-instructions {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.game-instructions p {
    margin-bottom: 15px;
}

.replay-button {
    background: linear-gradient(145deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 8px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.replay-icon {
    font-size: 1.2rem;
}

/* Settings styles */
.settings {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.setting-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.reset-button {
    background: linear-gradient(145deg, var(--accent-color), var(--accent-dark));
    color: white;
    padding: 8px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
}

.keyboard-tip {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-dim);
    font-style: italic;
}

/* Enhanced footer */
.footer {
    margin-top: 60px;
    padding: 40px 20px;
    background: linear-gradient(to top, rgba(26, 37, 48, 0.9), rgba(26, 37, 48, 0.7));
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-unified {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-sections {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    text-align: left;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-light);
    position: relative;
    display: inline-block;
}

.footer-section h3::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary-color);
}

.footer-section p {
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 10px;
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: 10px;
}

.footer-section a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
}

.footer-section a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--primary-color);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-section a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* Media queries for responsiveness */
@media (max-width: 768px) {
    .footer-sections {
        flex-direction: column;
        gap: 20px;
    }

    .footer-section {
        min-width: 100%;
    }
}

/* Chart page specific styles */
.page-intro {
    text-align: center;
    margin-bottom: 30px;
}

.page-intro h2 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.page-intro p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-dim);
}

.morse-info-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 30px 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.5s ease-out;
    text-align: left;
}

.morse-info-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.morse-info-card p {
    line-height: 1.7;
    margin-bottom: 20px;
}

.morse-tips {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 20px;
    border-left: 3px solid var(--secondary-color);
}

.morse-tips h4 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.morse-tips ul {
    padding-left: 20px;
}

.morse-tips li {
    margin-bottom: 10px;
    color: var(--text-dim);
}

.morse-history {
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    margin: 30px 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    animation: fadeIn 0.5s ease-out;
    text-align: left;
}

.morse-history h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-align: center;
}

.history-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.history-content p {
    line-height: 1.7;
    color: var(--text-dim);
}

.morse-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 15px;
    margin: 20px 0;
}

.morse-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-md);
    padding: 15px 10px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.morse-item:hover {
    transform: translateY(-3px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.1);
}

.morse-item.playing {
    background: rgba(52, 152, 219, 0.2);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(52, 152, 219, 0.3);
    animation: pulse 1s infinite;
}

.morse-item .character {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.morse-item .morse {
    font-size: 1rem;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.back-link {
    margin: 40px 0;
    text-align: center;
}

.back-link a {
    display: inline-block;
    background: linear-gradient(145deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 12px 25px;
    border-radius: var(--border-radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.back-link a:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.back-link a:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
    .morse-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
        gap: 10px;
    }

    .morse-item .character {
        font-size: 1.5rem;
    }

    .morse-item .morse {
        font-size: 0.9rem;
    }

    .morse-info-card,
    .morse-history,
    .chart-section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .morse-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
        gap: 8px;
    }

    .morse-item {
        padding: 10px 5px;
    }

    .morse-item .character {
        font-size: 1.3rem;
    }

    .morse-item .morse {
        font-size: 0.8rem;
    }
}