/* Import der Inter Schriftart */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Variablen für Theme */
:root {
  /* Brightness Control */
  --brightness: 1;
  /* Light Theme (Standard) */
  --bg-primary: rgba(187, 226, 150, 0.8);
  --bg-secondary: rgba(223, 204, 204, 0.7);
  --text-primary: #1a202c;
  --text-secondary: #000000;
  --border-color: rgba(226, 232, 240, 0.3);
  --accent-color: #db9c13;
  --accent-hover: #357abd;
  --shadow-color: rgba(0,0,0,0.1);
  --code-bg: #2d3748;
  --code-text: #e2e8f0;
  --text-shadow-light: 1px 1px 2px rgba(0, 0, 0, 0.5);
  --text-shadow-dark: 1px 1px 2px rgba(255, 255, 255, 0.5);
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --glass-blur: blur(10px);
  /* Difficulty Colors */
  --easy-bg: rgba(230, 255, 230, 0.7);
  --easy-text: #006600;
  --medium-bg: rgba(255, 243, 230, 0.7);
  --medium-text: #cc6600;
  --hard-bg: rgba(255, 230, 230, 0.7);
  --hard-text: #cc0000;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: rgba(165, 150, 79, calc(0.8 * var(--brightness)));
  --bg-secondary: rgba(37, 32, 14, calc(0.7 * var(--brightness)));
  --text-primary: #ffffff;
  --text-secondary: #ffd700;
  --border-color: rgba(197, 168, 28, 0.3);
  --accent-color: #ffd700;
  --accent-hover: #ffb700;
  --shadow-color: rgba(0,0,0,0.25);
  --code-bg: #16130d;
  --code-text: #fbfaf9;
  /* Glassmorphism Dark */
  --glass-bg: rgba(0, 0, 0, 0.2);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  /* Difficulty Colors */
  --easy-bg: rgba(40, 167, 69, 0.2);
  --easy-text: #50c878;
  --medium-bg: rgba(255, 165, 0, 0.2);
  --medium-text: #ffa500;
  --hard-bg: rgba(220, 53, 69, 0.2);
  --hard-text: #ff6b6b;
}

/* Zusätzliche Dark Theme Anpassungen */
[data-theme="dark"] .feature-card,
[data-theme="dark"] .task-card,
[data-theme="dark"] .quiz-container,
[data-theme="dark"] .roadmap-container,
[data-theme="dark"] .code-section,
[data-theme="dark"] .preview-section {
  background: rgba(0, 0, 0, 0.7);
  border-color: var(--glass-border);
}

[data-theme="dark"] .feature-list li::before,
[data-theme="dark"] .task-steps li::before {
  color: var(--accent-color);
}

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

[data-theme="dark"] .difficulty {
  opacity: 0.9;
}

[data-theme="dark"] .task-hint,
[data-theme="dark"] .explanation {
  background: var(--glass-bg);
  border-left-color: var(--accent-color);
}

[data-theme="dark"] .preview-box {
  border-color: var(--glass-border);
  background: rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .nav-button {
  background: var(--accent-color);
  color: var(--bg-secondary);
}

[data-theme="dark"] .nav-button:hover:not(:disabled) {
  background: var(--accent-hover);
}

[data-theme="dark"] .nav-button:disabled {
  background: var(--glass-bg);
  opacity: 0.7;
}

/* Reset und Basis-Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
  background: linear-gradient(135deg, var(--bg-primary), var(--accent-color));
  color: var(--text-primary);
  min-height: 100vh;
}

/* Listen-Styles */
ul, ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* Verschachtelte Listen */
li > ul,
li > ol {
  margin: 0.5rem 0 0.5rem 1.5rem;
}

/* Hausaufgaben-Listen */
.homework ol {
  counter-reset: homework;
  list-style: none;
  padding-left: 0;
}

.homework ol > li {
  counter-increment: homework;
  margin-bottom: 1.5rem;
  padding-left: 2.5rem;
  position: relative;
}

.homework ol > li::before {
  content: counter(homework) ".";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-weight: bold;
}

.homework ul {
  list-style: none;
  padding-left: 1rem;
}

.homework ul > li {
  position: relative;
  padding-left: 1.5rem;
}

.homework ul > li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-color);
}

.homework ul ul {
  margin-top: 0.5rem;
}

.homework ul ul > li::before {
  content: "◦";
}

/* Text shadows für helle/dunkle Schriften */
[data-theme="light"] {
  /* Dunkle Schatten für helle Schriften */
  .nav-button, 
  .button,
  nav a[aria-current="page"],
  .task-number,
  .user .message-content,
  .exercise.easy h4,
  .exercise.medium h4,
  .exercise.hard h4 {
    text-shadow: var(--text-shadow-light);
  }

  /* Helle Schatten für dunkle Schriften */
  h1, h2, h3, p, 
  nav a:not([aria-current="page"]),
  .task-title,
  .task-description,
  .task-steps li,
  .feature-card h2,
  .feature-list li,
  .exercise li,
  .exercise p {
    text-shadow: var(--text-shadow-dark);
  }
}

[data-theme="dark"] {
  /* Dunkle Schatten für helle Schriften */
  h1, h2, h3, p,
  nav a:not([aria-current="page"]),
  .task-title,
  .task-description,
  .task-steps li,
  .feature-card h2,
  .feature-list li,
  .exercise h4,
  .exercise li,
  .exercise p {
    text-shadow: var(--text-shadow-light);
  }

  /* Helle Schatten für dunkle Schriften */
  .nav-button:disabled,
  .button:disabled {
    text-shadow: var(--text-shadow-dark);
  }
}

/* Container */
.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 30px;
}

/* Navigation */
nav {
  background: var(--glass-bg);
  padding: 1rem 2rem;
  box-shadow: var(--glass-shadow);
  margin-bottom: 2rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
}

nav .logo {
  display: flex;
  align-items: center;
  padding: 0;
}

nav .logo:hover {
  background: none;
}

nav .logo img {
  height: 40px;
  width: auto;
  transition: transform 0.3s ease;
}

nav .logo:hover img {
  transform: scale(1.1);
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

nav a:hover {
  background: var(--glass-bg);
  color: var(--accent-color);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

nav a[aria-current="page"] {
  background: var(--accent-color);
  color: var(--bg-secondary);
}

/* Theme Toggle Button und Brightness Control */
.theme-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-left: auto;
}

.theme-toggle {
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.brightness-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brightness-slider {
  -webkit-appearance: none;
  width: 100px;
  height: 6px;
  border-radius: 3px;
  background: var(--glass-bg);
  outline: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.brightness-slider:hover {
  opacity: 1;
}

.brightness-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.brightness-slider::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.brightness-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.brightness-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Hauptinhalt */
main {
  background: var(--glass-bg);
  border-radius: 16px;
  padding: 30px;
  box-shadow: var(--glass-shadow);
  margin: 0 auto;
  max-width: 1200px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

/* Feature Cards */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: var(--glass-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow);
  border-color: var(--accent-color);
}

/* Task Cards */
.task-card {
  background: var(--glass-bg);
  border-radius: 12px;
  padding: 25px;
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--glass-border);
  transition: all 0.3s ease;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.task-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow);
  border-color: var(--accent-color);
}

/* Code und Preview Sektionen */
.code-section,
.preview-section {
  background: var(--glass-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.preview-box {
  border: 2px dashed var(--glass-border);
  border-radius: 8px;
  padding: 1.5rem;
  min-height: 100px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

/* Buttons */
.button {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: var(--glass-bg);
  color: var(--text-primary);
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.button:hover {
  background: var(--accent-color);
  color: var(--bg-secondary);
  transform: translateY(-2px);
}

/* Footer mit Glassmorphism */
footer {
  background: var(--glass-bg);
  padding: 1rem;
  text-align: center;
  margin-top: 2rem;
  border-top: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

footer a {
  color: var(--accent-color);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* Responsive Design Anpassungen */
@media (max-width: 768px) {
  .container {
    padding: 15px;
  }

  nav {
    padding: 1rem;
    justify-content: center;
  }

  h1 {
    font-size: 2em;
  }

  .split-container {
    grid-template-columns: 1fr;
  }

  .tutorial-navigation {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .button-group {
    flex-direction: column;
  }

  .features {
    grid-template-columns: 1fr;
    padding: 0 15px;
  }
}