/* Basis-Designvariablen im Light-Theme */
:root {
    /* Farben */
    --primary-color: #4a6cfa;
    --secondary-color: #f5f7ff;
    --text-color: #333;
    --bg-color: #fff;
    --card-bg: #f5f7ff;
    --header-bg: #4a6cfa;
    --header-text: #fff;
    --accent-color: #3DD6D0;
    --success-color: #4CAF50;
    --border-color: #e0e0e0;
    --footer-bg: #f8f9fa;
    --footer-text: #777;

    /* Schatten */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 6px 15px rgba(74, 108, 250, 0.3);

    /* Border-Radius */
    --border-radius-sm: 8px;
    --border-radius-md: 10px;
    --border-radius-lg: 50px;

    /* Abstände */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Übergänge */
    --transition-fast: 0s;   /* Ursprünglich 0.2s */
    --transition-normal: 0s; /* Ursprünglich 0.3s */
    --transition-slow: 0s;   /* Ursprünglich 0.5s */
}

/* Dark-Theme-Variablen */
[data-theme="dark"] {
    --primary-color: #6d8eff;
    --secondary-color: #2a2d3e;
    --text-color: #e0e0e0;
    --bg-color: #121418;
    --card-bg: #2a2d3e;
    --header-bg: #2a2d3e;
    --header-text: #e0e0e0;
    --accent-color: #3DD6D0;
    --success-color: #5CDF65;
    --border-color: #444;
    --footer-bg: #2a2d3e;
    --footer-text: #999;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 6px 15px rgba(109, 143, 255, 0.956);
}

/* Basis-Reset und Übergänge */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color var(--transition-normal),
                color var(--transition-normal),
                border-color var(--transition-normal);
}

/* HTML & Body Setup */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
}

main {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: var(--spacing-xxl) auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

/* Header */
header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: var(--spacing-sm);
    width: 100%;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Footer */
footer {
    background-color: var(--footer-bg);
    padding: var(--spacing-lg);
    text-align: center;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-normal);
    padding: var(--spacing-xs);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.copyright {
    color: var(--footer-text);
    font-size: 0.9rem;
}

h1 {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.description {
    margin-bottom: var(--spacing-xl);
    font-size: clamp(0.9rem, 3vw, 1.1rem);
    color: var(--text-color);
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

a {
    text-decoration: none;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
}

.logo img {
    width: 100%;
    max-width: 50px;
    max-height: 50px;
}

.logo h1 {
    margin: 0;
    padding-left: 10px;
    color: var(--header-text);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--header-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    transition: opacity var(--transition-normal);
}

.nav-links a:hover {
    opacity: 0.8;
}

.theme-toggle {
    display: flex;
    align-items: center;
    margin-left: var(--spacing-md);
}

.theme-toggle-label {
    margin-right: var(--spacing-xs);
    font-size: 0.9rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.3);
    transition: var(--transition-normal);
    border-radius: 24px;
}

.slider:before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-normal);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #1a1c23;
}

input:checked + .slider:before {
    transform: translateX(26px);
    background-color: var(--primary-color);
}