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

:root {
    --bg-grad-1-dark: #1a1a1a;
    --bg-grad-2-dark: #333333;
    --text-color-dark: white;
    --container-bg-dark: rgba(0, 0, 0, 0.2);
    --number-bg-dark: rgba(255, 255, 255, 0.1);
    --number-text-dark: #fff;
    --glow-1-dark: rgba(0, 255, 255, 0.5);
    --glow-2-dark: rgba(255, 0, 255, 0.5);
    --glow-1-hover-dark: rgba(0, 255, 255, 0.8);
    --glow-2-hover-dark: rgba(255, 0, 255, 0.8);
    --h1-shadow-1-dark: rgba(0, 255, 255, 0.8);
    --h1-shadow-2-dark: rgba(255, 0, 255, 0.8);
    --toggle-btn-bg-dark: rgba(255, 255, 255, 0.1);
    --toggle-btn-hover-dark: rgba(255, 255, 255, 0.2);
    --toggle-btn-text-dark: #fff;

    --bg-grad-1-light: #f0f0f0;
    --bg-grad-2-light: #dcdcdc;
    --text-color-light: #333;
    --container-bg-light: rgba(255, 255, 255, 0.8);
    --number-bg-light: rgba(0, 0, 0, 0.05);
    --number-text-light: #333;
    --glow-1-light: rgba(0, 100, 100, 0.3);
    --glow-2-light: rgba(100, 0, 100, 0.3);
    --glow-1-hover-light: rgba(0, 100, 100, 0.5);
    --glow-2-hover-light: rgba(100, 0, 100, 0.5);
    --h1-shadow-1-light: rgba(0, 100, 100, 0.4);
    --h1-shadow-2-light: rgba(100, 0, 100, 0.4);
    --toggle-btn-bg-light: rgba(0, 0, 0, 0.1);
    --toggle-btn-hover-light: rgba(0, 0, 0, 0.2);
    --toggle-btn-text-light: #333;
}

body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    overflow: hidden;
    transition: background 0.5s ease;
}

body[data-theme="dark"] {
    background: linear-gradient(45deg, var(--bg-grad-1-dark), var(--bg-grad-2-dark));
    color: var(--text-color-dark);
}

body[data-theme="light"] {
    background: linear-gradient(45deg, var(--bg-grad-1-light), var(--bg-grad-2-light));
    color: var(--text-color-light);
}

.theme-switch-container {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 10;
}

#theme-toggle-button {
    background: var(--toggle-btn-bg-dark); /* Default to dark theme button bg */
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 1.5em;
    transition: background 0.3s ease, transform 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    color: var(--toggle-btn-text-dark);
    position: relative; /* For absolute positioning of icons */
    overflow: hidden;
}

body[data-theme="light"] #theme-toggle-button {
    background: var(--toggle-btn-bg-light);
    color: var(--toggle-btn-text-light);
}

#theme-toggle-button:hover {
    transform: scale(1.1);
    background: var(--toggle-btn-hover-dark); /* Default to dark theme button hover */
}

body[data-theme="light"] #theme-toggle-button:hover {
    background: var(--toggle-btn-hover-light);
}

#theme-toggle-button .icon {
    position: absolute;
    transition: all 0.3s ease;
}

body[data-theme="dark"] .sun-icon {
    transform: translateY(100%);
    opacity: 0;
}

body[data-theme="dark"] .moon-icon {
    transform: translateY(0);
    opacity: 1;
}

body[data-theme="light"] .sun-icon {
    transform: translateY(0);
    opacity: 1;
}

body[data-theme="light"] .moon-icon {
    transform: translateY(-100%);
    opacity: 0;
}


.container {
    text-align: center;
    padding: 40px;
    border-radius: 20px;
    animation: float 6s ease-in-out infinite;
    position: relative;
    transition: background 0.5s ease, box-shadow 0.5s ease;
}

body[data-theme="dark"] .container {
    background: var(--container-bg-dark);
    box-shadow: 0 0 30px var(--glow-1-dark), 0 0 60px var(--glow-2-dark);
}

body[data-theme="light"] .container {
    background: var(--container-bg-light);
    box-shadow: 0 0 20px var(--glow-1-light), 0 0 40px var(--glow-2-light);
}


@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

h1 {
    font-size: 3em;
    font-weight: 700;
    margin-bottom: 30px;
    transition: text-shadow 0.5s ease;
}

body[data-theme="dark"] h1 {
    text-shadow: 0 0 10px var(--h1-shadow-1-dark), 0 0 20px var(--h1-shadow-2-dark);
}

body[data-theme="light"] h1 {
    text-shadow: 0 0 5px var(--h1-shadow-1-light), 0 0 10px var(--h1-shadow-2-light);
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
}

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.8em;
    font-weight: 600;
    border: 2px solid transparent;
    transition: all 0.5s ease;
    transform: scale(0);
    opacity: 0;
}

body[data-theme="dark"] .number {
    background-color: var(--number-bg-dark);
    color: var(--number-text-dark);
}

body[data-theme="light"] .number {
    background-color: var(--number-bg-light);
    color: var(--number-text-light);
}

.number.generated {
    transform: scale(1);
    opacity: 1;
}

#generate-btn {
    background: linear-gradient(45deg, #00ffff, #ff00ff);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2em;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
}

body[data-theme="dark"] #generate-btn {
    box-shadow: 0 0 15px var(--glow-1-dark), 0 0 30px var(--glow-2-dark);
}

body[data-theme="light"] #generate-btn {
    box-shadow: 0 0 10px var(--glow-1-light), 0 0 20px var(--glow-2-light);
}


#generate-btn:hover {
    transform: scale(1.1);
}

body[data-theme="dark"] #generate-btn:hover {
    box-shadow: 0 0 25px var(--glow-1-hover-dark), 0 0 50px var(--glow-2-hover-dark);
}

body[data-theme="light"] #generate-btn:hover {
    box-shadow: 0 0 15px var(--glow-1-hover-light), 0 0 30px var(--glow-2-hover-light);
}