/* Morse Hero Main 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;
}

* {
    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%);
    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;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 30px 20px;
    text-align: center;
    width: 100%;
}

h1 {
    color: var(--secondary-color);
    text-shadow:
        0 0 15px rgba(243, 156, 18, 0.4),
        3px 3px 0px rgba(231, 76, 60, 0.6);
    font-size: 4.5em;
    margin-bottom: 20px;
    margin-top: 0.5rem;
    letter-spacing: 2px;
    font-weight: 700;
    font-family: 'Fredoka', sans-serif;
    position: relative;
    display: inline-block;
}

h1::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
    border-radius: 2px;
}

.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;
}

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;
}

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;
}

.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-green 0.8s infinite alternate;
}

.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;
}

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

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

@keyframes shake {

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

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

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

.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;
}

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

.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);
}

.title-link {
    color: inherit;
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    display: inline-block;
}

.title-link:hover {
    color: var(--secondary-color);
    text-shadow: 0 0 15px rgba(243, 156, 18, 0.6);
}

.footer {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    font-size: 16px;
    color: var(--text-dim);
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer 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;
}

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

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

.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;
}

.chart-link {
    margin-top: 25px;
    font-size: 18px;
    display: inline-block;
}

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

.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 {
    color: var(--secondary-color);
}

.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-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);
}

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

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

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

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

    h1 {
        font-size: 3.5em;
    }

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

    .options {
        gap: 15px;
    }

    .option-button {
        font-size: 28px;
        padding: 20px 10px;
        min-height: 110px;
    }

    .start-button {
        font-size: 26px;
        padding: 18px 30px;
        max-width: 250px;
    }

    #startScreen {
        padding: 30px 20px;
        margin: 30px 0;
    }

    #startScreen p {
        font-size: 24px;
        margin-bottom: 30px;
    }

    #startScreen .chart-link {
        max-width: 250px;
    }

    #startScreen .chart-link a {
        padding: 10px 20px;
        font-size: 16px;
    }

    .settings {
        padding: 20px 15px;
    }

    .settings label {
        font-size: 18px;
    }

    .settings select {
        padding: 10px 15px;
        font-size: 16px;
    }

    .hint-setting {
        margin-left: 15px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2.8em;
    }

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

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

    .start-button {
        font-size: 22px;
        padding: 15px 25px;
        max-width: 220px;
        margin-bottom: 20px;
    }

    #startScreen {
        padding: 25px 15px;
        margin: 20px 0;
    }

    #startScreen p {
        font-size: 20px;
        margin-bottom: 25px;
    }

    #startScreen .chart-link {
        max-width: 220px;
    }

    #startScreen .chart-link a {
        padding: 8px 16px;
        font-size: 15px;
    }

    .settings {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

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