@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
    --background-color: #f0f2f5;
    --primary-color: #4a90e2;
    --secondary-color: #50e3c2;
    --text-color: #333;
    --card-bg: #ffffff;
    --white: #fff;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --primary-color: #64b5f6;
    --secondary-color: #4db6ac;
    --text-color: #e0e0e0;
    --card-bg: #2d2d2d;
    --white: #fff;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 2rem 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    position: relative;
    text-align: center;
    background-color: var(--card-bg);
    padding: 3rem 4rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: 10px;
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.theme-text {
    font-size: 0.9rem;
    font-weight: 600;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    font-weight: 700;
}

.numbers-display {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.number-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.number-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.number-circle:hover {
    transform: scale(1.1);
}

#generate-button {
    padding: 1rem 2.5rem;
    border: none;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
}

#generate-button:hover {
    background-color: #357ABD;
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.5);
    transform: translateY(-2px);
}

#generate-button:active {
    transform: translateY(0);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
}