/* ============================
   Grundlegende Styles & Reset
============================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  height: 100%;
  /* Neue Schriftart */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* ============================
   Dark Mode & Light Mode Variablen (Lila-Schwarz & Matte Weiß)
============================ */
body.dark-mode {
  --bg-color: #000000;         /* Matte schwarzer Hintergrund */
  --sidebar-color: #121212;      /* Sehr dunkles Grau für die Sidebar */
  --sidebar-border: #1a1a1a;
  --text-color: #ffffff;
  --text-muted: #cccccc;
  --footer-color: #000000;
  --footer-border: #1a1a1a;
  --accent-color: #a64ca6;       /* Akzentfarbe in lila Ton */
  --secondary-bg: #121212;
  --link-hover: #b06ab3;
  /* Button-Variablen */
  --btn-start: #c080c0;
  --btn-end: #720072;
}

body.light-mode {
  /* Matte Weiß als Hintergrund */
  --bg-color: #f8f8f8;
  --sidebar-color: #e8d0f1;
  --sidebar-border: #ce93d8;
  --text-color: #000000;
  --text-muted: #555555;
  --footer-color: #e8d0f1;
  --footer-border: #ce93d8;
  --accent-color: #9c27b0;
  --secondary-bg: #f8f4fb;
  --link-hover: #ab47bc;
  --btn-start: #d1a3d4;
  --btn-end: #af69c1;
}

/* ============================
   Basis-Layout & Komponenten
============================ */
body {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

.content-wrapper {
  display: flex;
  flex: 1;
}

.sidebar {
  width: 240px;
  background-color: var(--sidebar-color);
  border-right: 1px solid var(--sidebar-border);
  padding: 1rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.sidebar-logo,
.logo {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--sidebar-border);
  padding-bottom: 0.5rem;
}

.nav-list,
.sidebar nav ul {
  list-style: none;
  margin-bottom: 2rem;
  padding: 0;
}

.nav-list li,
.sidebar nav ul li {
  margin-bottom: 0.5rem;
}

.nav-list a,
.sidebar nav ul li a {
  color: var(--text-color);
  text-decoration: none;
  padding: 0.5rem;
  display: block;
  border-radius: 4px;
  transition: background-color 0.3s ease;
}

.nav-list a:hover,
.nav-list a.active,
.sidebar nav ul li a:hover,
.sidebar nav ul li a.active {
  background-color: var(--link-hover);
}

.settings-container {
  margin-top: 2rem;
  position: relative;
  border-top: 1px solid var(--sidebar-border);
  padding-top: 1rem;
}

.settings-btn {
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.5rem;
}

.settings-popover {
  display: none;
  position: absolute;
  top: 0;
  left: 105%;
  flex-direction: column;
  background-color: var(--secondary-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: 4px;
  padding: 0.5rem;
  z-index: 100;
}

.settings-popover .option-btn {
  background: transparent;
  border: none;
  color: var(--text-color);
  padding: 0.5rem;
  text-align: left;
  cursor: pointer;
  width: 100%;
}

.settings-popover .option-btn:hover {
  background-color: var(--link-hover);
}

.main-content,
.content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.welcome {
  margin-bottom: 2rem;
}

.welcome h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.welcome p {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

input[type="text"],
textarea {
  background-color: var(--secondary-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: 4px;
  padding: 0.5rem;
  color: var(--text-color);
  width: 100%;
  margin-bottom: 1rem;
}

.btn {
  font-family: inherit;
  text-decoration: none;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
  transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(45deg, var(--btn-start), var(--btn-end));
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
  background: linear-gradient(45deg, #444444, #333333);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--text-color);
  color: var(--text-color);
  box-shadow: none;
}

.btn-outline:hover {
  background: var(--secondary-bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.features-section {
  margin-top: 2rem;
  display: flex;
  gap: 2rem;
}

.feature {
  flex: 1;
  background-color: var(--secondary-bg);
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.feature h3 {
  margin-bottom: 0.5rem;
}

.feature p {
  color: var(--text-muted);
}

.research-container {
  background-color: var(--secondary-bg);
  border: 1px solid var(--sidebar-border);
  border-radius: 8px;
  padding: 1rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.drop-zone {
  border: 2px dashed var(--sidebar-border);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.drop-zone:hover {
  background-color: var(--secondary-bg);
  border-color: var(--accent-color);
}

/* Footer: Text weiter unten und kleiner */
.site-footer {
  background-color: var(--footer-color);
  border-top: 1px solid var(--footer-border);
  text-align: right;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.8em;  /* Schrift kleiner */
  margin-top: 2rem;  /* Mehr Abstand nach oben */
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.cybermap-canvas {
  width: 100%;
  max-width: 1000px;
  height: 500px;
  border: 2px solid var(--accent-color);
  margin-bottom: 1rem;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  background-color: #f0f0f0;
}

.city-info {
  background-color: var(--secondary-bg);
  border: 1px solid var(--sidebar-border);
  padding: 0.5rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  width: 100%;
  max-width: 1000px;
}

.city-info h4 {
  margin-bottom: 0.5rem;
}

.city-info p {
  color: var(--text-muted);
}

.historie-container {
  padding: 1rem;
}

.historie-container h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.historie-entry {
  background-color: var(--secondary-bg);
  border: 1px solid var(--sidebar-border);
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.historie-entry h3 {
  margin-bottom: 0.5rem;
}

.historie-entry p {
  color: var(--text-muted);
}

#historyTable {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--secondary-bg);
  margin-top: 1rem;
}

#historyTable th,
#historyTable td {
  border: 1px solid var(--sidebar-border);
  padding: 0.5rem 1rem;
  text-align: left;
}

@media (max-width: 768px) {
  .content-wrapper {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--sidebar-border);
  }
}

.filter-btn {
  background: linear-gradient(45deg, var(--btn-start), var(--btn-end));
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  margin: 0.3rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease;
  font-weight: 600;
}

.filter-btn:hover {
  background: linear-gradient(45deg, var(--btn-end), var(--btn-start));
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}