body {
    margin: 0;
    padding: 0;
    font-family: Inter, sans-serif;
    font-weight: 400;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    color: #2c3e50;
    line-height: 1.6;
}

:root {
    --border: 1.5px solid rgba(0, 0, 0, 0.08);
    --text-col: #2c3e50;
    --text-light: #546e7a;
    --accent-col: #2c3e50;
    --accent-dark: #1a252f;
    --accent-light: #34495e;
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

button[type="button"] {
    font-size: 1.5em;
    padding: 0.5em 0.75em;
    border: none;
    background: var(--accent-col);
    color: #fff;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

button[type="button"]:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
    background: var(--accent-dark);
}