:root {
    --font-primary: 'Poppins', sans-serif;

    /* Light Theme (Default) */
    --color-bg: #f4f7f6;
    --color-card: #ffffff;
    --color-primary: #4f5d75;
    --color-accent: #b56576;
    --color-text: #333333;
    --color-text-dim: #666666;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-border: #eeeeee;

    --shadow-deep: 0 10px 20px var(--color-shadow), 0 6px 6px var(--color-shadow);
    --shadow-soft: 0 4px 8px rgba(0,0,0,0.05);
}

[data-theme='dark'] {
    --color-bg: #1a1a1d;
    --color-card: #2c2c31;
    --color-text: #ffffff;
    --color-text-dim: #cccccc;
    --color-shadow: rgba(0, 0, 0, 0.4);
    --color-border: #3a3a3f;
}

body {
    margin: 0;
    padding: 2rem;
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
    background-image: linear-gradient(rgba(0,0,0,0.02) 2px, transparent 2px),
    linear-gradient(90deg, rgba(0,0,0,0.02) 2px, transparent 2px);
    background-size: 50px 50px;
}

[data-theme='dark'] body {
    background-image: linear-gradient(rgba(255,255,255,0.01) 2px, transparent 2px),
    linear-gradient(90deg, rgba(255,255,255,0.01) 2px, transparent 2px);
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.75rem;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 100;
}

.theme-toggle:hover {
    transform: rotate(15deg) scale(1.1);
    box-shadow: var(--shadow-deep);
}

.lotto-card {
    background-color: var(--color-card);
    padding: 2rem 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-deep);
    text-align: center;
    max-width: 400px;
    width: 100%;
    transition: transform 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--color-border);
}

.lotto-card:hover {
    transform: translateY(-5px);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.card-header .la-dice-d20 {
    font-size: 2.5rem;
    color: var(--color-accent);
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}

.numbers-display {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    min-height: 50px;
}

.number-bubble {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    box-shadow: var(--shadow-soft);
    animation: popIn 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55) forwards;
}

@keyframes popIn {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.generate-btn {
    background: linear-gradient(45deg, var(--color-primary), var(--color-accent));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(181, 101, 118, 0.3);
    transition: all 0.3s ease;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(181, 101, 118, 0.4);
}

.generate-btn .la-arrow-right {
    transition: transform 0.3s ease;
}

.generate-btn:hover .la-arrow-right {
    transform: translateX(4px);
}