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

:root {
    --bg-color: linear-gradient(135deg, #6e8efb, #a777e3);
    --text-color: white;
    --container-bg: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.18);
    --lotto-number-bg: #a777e3;
    --button-bg: white;
    --button-text: #6e8efb;
    --input-bg: rgba(255, 255, 255, 0.2);
    --input-border: rgba(255, 255, 255, 0.5);
    --button-hover-bg: #f0f0f0;
    --button-hover-shadow: rgba(0, 0, 0, 0.15);
}

body.dark-mode {
    --bg-color: linear-gradient(135deg, #2c3e50, #34495e);
    --text-color: white;
    --container-bg: rgba(0, 0, 0, 0.3);
    --border-color: rgba(255, 255, 255, 0.05);
    --lotto-number-bg: #3498db;
    --button-bg: #34495e;
    --button-text: white;
    --input-bg: rgba(255, 255, 255, 0.1);
    --input-border: rgba(255, 255, 255, 0.3);
    --button-hover-bg: #4a6984;
    --button-hover-shadow: rgba(0, 0, 0, 0.25);
}

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

.container {
    background: var(--container-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    transition: background 0.3s ease, border-color 0.3s ease;
}

h1 {
    margin-bottom: 2rem;
    font-weight: 600;
}

.theme-toggle {
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 1rem;
    transition: background 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover {
    background: var(--button-hover-bg);
    box-shadow: 0 4px 15px var(--button-hover-shadow);
}

.input-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

#sets-input {
    width: 60px;
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-color);
    text-align: center;
    font-size: 1rem;
    transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.lotto-numbers {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
    align-items: center;
}

.lotto-set {
    display: flex;
    gap: 1rem;
}

.lotto-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--lotto-number-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: background 0.3s ease;
}

#generate-btn {
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 10px;
    background: var(--button-bg);
    color: var(--button-text);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}

#generate-btn:hover {
    background: var(--button-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--button-hover-shadow);
}