/* Farben und Basisvariablen */
:root {
  --primary: #1abc9c;         /* Frisches Türkis als Akzent */
  --secondary: #2c3e50;       /* Dunkles Blau-Grau */
  --background: #2a2a2a;      /* Dunkler Hintergrund */
  --text: #e0e0e0;            /* Heller Text */
  --danger: #e74c3c;          /* Rot für Warnungen */
  --light: #f4f4f4;           /* Helles Weiß für Texte auf dunklen Flächen */
  --card-bg: #3a3a3a;         /* Dunklere Card-Hintergründe */
  --shadow: rgba(0, 0, 0, 0.3);
}

/* Grundlegende Resets und Basisdesign */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Open Sans', sans-serif;
  background-color: var(--background);
  color: var(--text);
  line-height: 1.6;
}

/* Header */
header {
  background-color: var(--secondary);
  color: var(--light);
  padding: 20px;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header h1 {
  margin-bottom: 10px;
}

nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-weight: 600;
  color: #fff;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 40px auto;
  padding: 30px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
}

/* Card-Design */
.card {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
}

/* Karten-Container – Cards immer untereinander, 1 cm Abstand */
.cards {
  display: grid;
  gap: 1cm;
  grid-template-columns: 1fr;
}

/* Alerts */
.alert {
  padding: 12px 20px;
  border-radius: 5px;
  margin-bottom: 20px;
  font-weight: 600;
  text-align: center;
}
.alert-error {
  background-color: var(--danger);
  color: var(--light);
}

/* Formulare */
form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.form-group {
  flex: 1;
  min-width: 150px;
}

form label {
  font-weight: 600;
  margin-bottom: 5px;
}

form input,
form select,
form textarea {
  padding: 10px;
  border: 1px solid #555;
  border-radius: 5px;
  background-color: #555;
  color: var(--light);
  transition: border-color 0.3s, box-shadow 0.3s;
}

form input:focus,
form select:focus,
form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 188, 156, 0.3);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 5px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s, transform 0.3s;
}

.btn:hover {
  transform: translateY(-2px);
}

/* Button Farbvarianten */
.btn-primary {
  background-color: var(--primary);
  color: var(--light);
  border: none;
}
.btn-secondary {
  background-color: var(--secondary);
  color: var(--light);
  border: none;
}
.btn-danger {
  background-color: var(--danger);
  color: var(--light);
  border: none;
}
.btn-info {
  background-color: #3498db;
  color: var(--light);
  border: none;
  transition: background 0.3s, transform 0.3s;
}
.btn-info:hover {
  background-color: #2980b9;
}

/* Verkleinerte Aktionsbuttons: feste Größe 1cm x 1cm */
.action-buttons a,
.action-buttons button {
  width: 1cm;
  height: 1cm;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9em;
  padding: 0;
  margin: 0;
}

/* Speziell für Edit-Button */
.btn-edit {
  background-color: #fd7e14;
  color: var(--light);
  border: none;
}

/* Tabellen */
.user-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
}
.user-table thead {
  background-color: var(--secondary);
  color: var(--light);
}
.user-table th,
.user-table td {
  padding: 12px 15px;
  text-align: left;
}
.user-table tbody tr:nth-child(even) {
  background-color: #4a4a4a;
}
.user-table tbody tr:hover {
  background-color: #555;
}
.action-buttons {
  display: flex;
  gap: 5px;
}

/* Footer */
footer {
  background-color: var(--secondary);
  color: var(--light);
  text-align: center;
  padding: 15px;
  margin-top: 40px;
  font-size: 0.9em;
}

/* -------------------------------
   Zusätzliche CSS-Elemente aus Admin-Dashboard
-------------------------------- */

/* Tab-Header und Tab-Buttons */
.tab-header {
  display: flex;
  background: var(--card-bg);
  border-bottom: 1px solid #555;
  margin-bottom: 20px;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}
.tab-button {
  flex: 1;
  padding: 15px;
  cursor: pointer;
  background: none;
  border: none;
  font-size: 16px;
  color: var(--light);
  text-align: center;
  transition: background 0.3s, font-weight 0.3s, border-radius 0.3s;
}
.tab-button.active {
  background: var(--background);
  font-weight: bold;
  border-bottom: 3px solid var(--primary);
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
  box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.3) inset;
}
.tab-button:not(.active):hover {
  background: #555;
}

/* Tab-Inhalt */
.tab-content {
  display: none;
  padding: 20px;
  background: var(--card-bg);
  border-radius: 0 0 8px 8px;
  box-shadow: 0 2px 4px var(--shadow);
}
.tab-content.active {
  display: block;
}

/* Zusätzliche Button-Klassen */
.btn-create {
  background-color: var(--primary);
  color: var(--light);
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.3s ease;
}
.btn-create:hover {
  background-color: #16a085;
}

.btn-reset {
  background-color: #17a2b8;
  color: var(--light);
  padding: 10px 20px;
  border: none;
  border-radius: 5px;
  font-size: 16px;
  text-decoration: none;
  display: inline-block;
  transition: background-color 0.3s ease;
}
.btn-reset:hover {
  background-color: #138496;
}

/* -------------------------------
   Zusätzliche neue CSS-Klassen für erweiterte Fahrzeugverwaltung
-------------------------------- */

/* Button für "Fahrzeuge verwalten" */
.btn-manage {
  background-color: #6c757d;
  color: var(--light);
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 16px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.3s;
}
.btn-manage:hover {
  background-color: #5a6268;
}

/* Button für "Fahrzeug hinzufügen" */
.btn-add {
  background-color: #28a745;
  color: var(--light);
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 16px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.3s;
}
.btn-add:hover {
  background-color: #218838;
}

/* Button für "Alle Fahrzeuge löschen" */
.btn-clear {
  background-color: var(--danger);
  color: var(--light);
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 16px;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.3s;
}
.btn-clear:hover {
  background-color: #c0392b;
}

/* -------------------------------
   Zusätzliche Anpassungen für Login/Registrierung
--------------------------------- */

/* Wrapper, um die Card zentriert anzuzeigen (Login/Registrierung) */
.auth-wrapper {
  max-width: 400px;
  margin: 80px auto;
  text-align: left;
}

/* Schmalere Card für Login/Registrierung */
.tab-card.small-card {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
  max-width: 400px;
  margin: 0 auto;
}

/* Formulare im Tab-Layout */
.tab-card form .form-group {
  margin-bottom: 15px;
}

.tab-card form .form-group label {
  font-weight: 600;
  margin-bottom: 5px;
  display: block;
}

.tab-card form input[type="text"],
.tab-card form input[type="password"] {
  width: 100%;
  padding: 10px;
  border: 1px solid #555;
  border-radius: 5px;
  background-color: #555;
  color: var(--light);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.tab-card form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 188, 156, 0.3);
}
.tab-card.small-card {
  max-width: 800px;
  margin: 20px auto;
  padding: 20px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 4px 8px var(--shadow);
}