/* Morse Hero Chart 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 {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-shadow: 3px 3px 0px rgba(0, 0, 0, 0.3),
        0 0 15px rgba(243, 156, 18, 0.5);
    font-family: 'Fredoka', sans-serif;
    font-weight: 600;
    position: relative;
    display: inline-block;
}

h1::after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--secondary-color));
    border-radius: 2px;
}

h2 {
    font-size: 32px;
    margin: 30px 0 15px;
    color: var(--primary-color);
    text-shadow: 2px 2px 0px rgba(0, 0, 0, 0.2),
        0 0 10px rgba(52, 152, 219, 0.4);
    font-family: 'Fredoka', sans-serif;
    font-weight: 600;
}

.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);
    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);
}

.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;
}

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

    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 28px;
    }

    .morse-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 15px;
    }

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

    .character {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 24px;
    }

    .morse-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 10px;
    }

    .character {
        font-size: 24px;
    }

    .morse {
        font-size: 16px;
    }
}