:root {
    --primary-color-light: #2c3e50;
    --secondary-color-light: #3498db;
    --background-color-light: #f8f9fa;
    --text-color-light: #2c3e50;
    --container-bg-light: white;
    --joke-bg-light: #f8f9fa;
    --icon-color-light: #2c3e50;

    --primary-color-dark: #ecf0f1;
    --secondary-color-dark: #3498db;
    --background-color-dark: #1a1a1a;
    --text-color-dark: #ecf0f1;
    --container-bg-dark: #2c3e50;
    --joke-bg-dark: #34495e;
    --icon-color-dark: #ecf0f1;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: var(--primary-color-dark);
        --secondary-color: var(--secondary-color-dark);
        --background-color: var(--background-color-dark);
        --text-color: var(--text-color-dark);
        --container-bg: var(--container-bg-dark);
        --joke-bg: var(--joke-bg-dark);
        --icon-color: var(--icon-color-dark);
    }
}

@media (prefers-color-scheme: light) {
    :root {
        --primary-color: var(--primary-color-light);
        --secondary-color: var(--secondary-color-light);
        --background-color: var(--background-color-light);
        --text-color: var(--text-color-light);
        --container-bg: var(--container-bg-light);
        --joke-bg: var(--joke-bg-light);
        --icon-color: var(--icon-color-light);
    }
}

[data-theme="dark"] {
    --primary-color: var(--primary-color-dark);
    --secondary-color: var(--secondary-color-dark);
    --background-color: var(--background-color-dark);
    --text-color: var(--text-color-dark);
    --container-bg: var(--container-bg-dark);
    --joke-bg: var(--joke-bg-dark);
    --icon-color: var(--icon-color-dark);
}

[data-theme="light"] {
    --primary-color: var(--primary-color-light);
    --secondary-color: var(--secondary-color-light);
    --background-color: var(--background-color-light);
    --text-color: var(--text-color-light);
    --container-bg: var(--container-bg-light);
    --joke-bg: var(--joke-bg-light);
    --icon-color: var(--icon-color-light);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.1);
    transform: scale(1.1);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.material-icons-round {
    color: var(--icon-color);
    font-size: 24px;
    transition: transform 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--container-bg);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    transition: background-color 0.3s ease;
}

h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

#joke-container {
    background-color: var(--joke-bg);
    padding: 2rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

#joke {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-color);
}

.button-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

#refresh-btn {
    padding: 0.8rem 1.5rem;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
}

#refresh-btn:hover {
    background-color: #2980b9;
    transform: translateY(-1px);
}

#refresh-btn:active {
    transform: translateY(1px);
}

#loading {
    text-align: center;
    margin-top: 1rem;
    height: 20px;
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    #joke {
        font-size: 1rem;
    }

    .theme-toggle {
        top: 10px;
        right: 10px;
    }
}