:root {
    --bg-color: #f0f0f0;
    --card-bg: #ffffff;
    --text-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --btn-bg: #4CAF50;
    --btn-hover: #45a049;
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --btn-bg: #388E3C;
    --btn-hover: #2E7D32;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.lotto-machine {
    position: relative;
    text-align: center;
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed);
    max-width: 500px;
    width: 90%;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 5px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

h1 {
    margin-top: 0;
    margin-bottom: 2rem;
    font-size: 2rem;
    font-weight: 700;
}

.numbers-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    margin-bottom: 2.5rem;
    min-height: 350px;
}

.number {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

@keyframes bounceIn {
    0% { transform: scale(0); opacity: 0; }
    60% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

#generate-btn {
    background-color: var(--btn-bg);
    color: white;
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--shadow-color);
    transition: background-color var(--transition-speed), transform 0.2s, box-shadow var(--transition-speed);
}

#generate-btn:hover {
    background-color: var(--btn-hover);
    transform: translateY(-2px);
}

#generate-btn:active {
    transform: translateY(0);
}