:root {
    --bg-color: #f7f9fc;
    --container-bg: #ffffff;
    --text-color: #1a1a1a;
    --number-bg: #f0f0f0;
    --number-text: #1a1a1a;
    --button-bg: #3b82f6;
    --button-hover: #2563eb;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --border-color: #e5e7eb;
}

body.dark-mode {
    --bg-color: #0f172a;
    --container-bg: #1e293b;
    --text-color: #f1f5f9;
    --number-bg: #334155;
    --number-text: #f8fafc;
    --button-bg: #60a5fa;
    --button-hover: #93c5fd;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --border-color: #334155;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.4s cubic-bezier(0.4, 0, 0.2, 1), color 0.4s ease;
}

#lotto-machine {
    text-align: center;
    background-color: var(--container-bg);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 25px -5px var(--shadow-color), 0 8px 10px -6px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: background-color 0.4s, border-color 0.4s, box-shadow 0.4s;
    width: 90%;
    max-width: 500px;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

#numbers {
    display: flex;
    gap: 0.75rem;
    margin: 2.5rem 0;
    justify-content: center;
    flex-wrap: wrap;
}

.number {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background-color: var(--number-bg);
    color: var(--number-text);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 700;
    transition: background-color 0.3s, transform 0.2s, color 0.3s;
    box-shadow: 0 4px 6px -1px var(--shadow-color);
}

.number:hover {
    transform: translateY(-2px);
}

#draw-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    background-color: var(--button-bg);
    color: #ffffff;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

#draw-button:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

#draw-button:active {
    transform: translateY(0);
}

#dark-mode-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    padding: 0.6rem 1.2rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background-color: var(--container-bg);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px var(--shadow-color);
}

#dark-mode-toggle:hover {
    border-color: var(--button-bg);
    transform: scale(1.05);
}

.icon {
    font-size: 1.1rem;
}