:root {
    /* Dark Theme Palette */
    --background-color: #2c3e50;
    --text-color: #ecf0f1;
    --accent-color: #3498db;
    --ball-background: #424242;
    --ball-text-color: #f0f0f0;
    --ball-shadow: 0 0 10px rgba(255,255,255,0.1), 0 0 20px rgba(255,255,255,0.05);
    --button-background: #34495e;
    --button-text-color: #ecf0f1;
    --button-border-color: var(--accent-color);
    --button-hover-bg: var(--accent-color);
    --button-hover-text: var(--background-color);
    --button-glow: 0 0 15px var(--accent-color);
    --input-background: #3a506b;
    --input-border: #2980b9;
    --input-text: #ecf0f1;
    --range-track-bg: #555;
    --range-thumb-bg: var(--accent-color);
}

:root[data-theme="light"] {
    /* Light Theme Palette */
    --background-color: #ecf0f1;
    --text-color: #2c3e50;
    --accent-color: #2980b9;
    --ball-background: #e0e0e0;
    --ball-text-color: #2c3e50;
    --ball-shadow: 0 0 10px rgba(0,0,0,0.1), 0 0 20px rgba(0,0,0,0.05);
    --button-background: #bdc3c7;
    --button-text-color: #2c3e50;
    --button-border-color: var(--accent-color);
    --button-hover-bg: var(--accent-color);
    --button-hover-text: #ffffff;
    --button-glow: 0 0 15px var(--accent-color);
    --input-background: #ffffff;
    --input-border: #bdc3c7;
    --input-text: #2c3e50;
    --range-track-bg: #ccc;
    --range-thumb-bg: var(--accent-color);
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: none;
    transition: background-color 0.5s ease, color 0.5s ease;
    overflow-y: auto;
    padding: 20px;
}

.container {
    text-align: center;
    padding: 2.5rem;
    background: var(--button-background);
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    transition: background 0.5s ease, box-shadow 0.5s ease;
    max-width: 800px;
    width: 90%;
    position: relative;
    border: 1px solid rgba(255,255,255,0.05);
}

:root[data-theme="light"] .container {
    background: #ffffff;
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border: 1px solid rgba(0,0,0,0.05);
}

h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
    text-shadow: none;
    margin-bottom: 1.5rem;
    letter-spacing: normal;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.9rem;
    color: var(--text-color);
}

.controls input[type="text"] { /* Keep text inputs styled */
    background-color: var(--input-background);
    color: var(--input-text);
    border: 1px solid var(--input-border);
    border-radius: 5px;
    padding: 0.5rem 0.8rem;
    font-size: 1rem;
    width: 180px;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

.controls input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(var(--accent-color), 0.2);
}

/* Styling for range input */
input[type="range"] {
    -webkit-appearance: none; /* Override default look */
    width: 180px;
    height: 8px; /* Track height */
    background: var(--range-track-bg);
    border-radius: 5px;
    outline: none;
    margin: 0;
    padding: 0;
    cursor: grab;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px; /* Thumb size */
    height: 20px; /* Thumb size */
    border-radius: 50%;
    background: var(--range-thumb-bg);
    cursor: grab;
    margin-top: -6px; /* Center thumb vertically on track */
    box-shadow: 0 0 5px rgba(0,0,0,0.3);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--range-thumb-bg);
    cursor: grab;
    box-shadow: 0 0 5px rgba(0,0,0,0.3);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

input[type="range"] + span { /* Style for the value display span */
    margin-left: 10px;
    font-weight: bold;
    color: var(--accent-color);
}


#generate-button {
    background-color: var(--button-background);
    color: var(--button-text-color);
    border: 2px solid var(--button-border-color);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
}

#generate-button:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
    box-shadow: var(--button-glow);
    transform: none;
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: var(--button-background);
    color: var(--text-color);
    border: 1px solid var(--accent-color);
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-weight: normal;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 3px rgba(0,0,0,0.2);
    z-index: 1000;
}

#theme-toggle:hover {
    background-color: var(--accent-color);
    color: var(--button-background);
    box-shadow: none;
}

#lotto-results-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

.lotto-set {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
    padding: 1rem;
    background: rgba(0,0,0,0.1);
    border-radius: 8px;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.1);
}

:root[data-theme="light"] .lotto-set {
    background: rgba(255,255,255,0.7);
    box-shadow: inset 0 0 5px rgba(0,0,0,0.05);
}