/* =========================
   Root Variables for Theme
   ========================= */
:root {
  /* Farben Hellmodus */
  --bg-color: #f9f9f9;
  --text-color: #222;
  --link-color: #0077cc;
  --link-hover: #005fa3;
  --button-bg: #0077cc;
  --button-text: #fff;
  --button-hover-bg: #005fa3;
  --input-bg: #fff;
  --input-border: #ccc;

  /* Schriftart */
  --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-color: #121212;
  --text-color: #f1f1f1;
  --link-color: #4ea3ff;
  --link-hover: #3390ff;
  --button-bg: #3390ff;
  --button-text: #fff;
  --button-hover-bg: #1a73e8;
  --input-bg: #1e1e1e;
  --input-border: #555;
}

/* =========================
   Global Styles
   ========================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  padding: 20px;
  transition: background-color 0.3s, color 0.3s;
}

/* Überschriften */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-color);
  margin-bottom: 1rem;
}

/* Absätze */
p {
  margin-bottom: 1rem;
}

/* Links */
a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--link-hover);
}

/* Listen */
ul, ol {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

/* Buttons */
button {
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border-radius: 6px;
  font-size: 16px;
  transition: background-color 0.3s;
  margin: 0.5rem;
}

button:hover {
  background-color: var(--button-hover-bg);
}

/* Inputs allgemein */
input, textarea, select {
  background-color: var(--input-bg);
  border: 2px solid var(--input-border);
  padding: 12px 15px;
  border-radius: 6px;
  color: var(--text-color);
  font-size: 18px;
  width: 100%;
  max-width: 500px;
  transition: border-color 0.3s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--link-color);
}

/* Layout Helpers */
.container {
  max-width: 1200px;
  margin: auto;
}

.center {
  text-align: center;
}

.flex {
  display: flex;
  gap: 1rem;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* =========================
   Toggle Button für Dark Mode
   ========================= */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 50px;
  z-index: 1000;
  transition: background-color 0.3s;
}

.theme-toggle:hover {
  background-color: var(--button-hover-bg);
}