* {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 nav {
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 20px 0;
     margin-bottom: 40px;
     border-bottom: 1px solid #eaeaea;
 }

 .logo {
     font-size: 1.8rem;
     font-weight: 300;
     color: #2c3e50;
     text-decoration: none;
 }

 .logo span {
     color: #3498db;
     font-weight: 400;
 }

 .nav-links {
     display: flex;
     gap: 30px;
 }

 .nav-links a {
     color: #34495e;
     text-decoration: none;
     font-size: 1rem;
     padding: 8px 16px;
     border-radius: 6px;
     transition: all 0.2s ease;
 }

 .nav-links a:hover {
     background: #ecf0f1;
     color: #2980b9;
 }

 .nav-links a.active {
     background: #3498db;
     color: white;
 }

 .nav-links a.active:hover {
     background: #2980b9;
 }

 body {
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
     line-height: 1.6;
     color: #333;
     background-color: #f8f9fa;
     max-width: 800px;
     margin: 0 auto;
     padding: 20px;
 }

 h1 {
     font-size: 2rem;
     font-weight: 300;
     margin-bottom: 10px;
     color: #2c3e50;
     text-align: center;
 }

 h2 {
     font-size: 1.4rem;
     font-weight: 400;
     margin-bottom: 15px;
     color: #34495e;
     padding-bottom: 8px;
     border-bottom: 1px solid #eaeaea;
 }

 p {
     color: #7f8c8d;
     margin-bottom: 25px;
     text-align: center;
     font-size: 0.95rem;
 }

 #addfächerBtn {
     display: block;
     width: 100%;
     padding: 12px;
     background: #3498db;
     color: white;
     border: none;
     border-radius: 6px;
     font-size: 1rem;
     cursor: pointer;
     transition: all 0.2s ease;
     margin-bottom: 25px;
 }

 #addfächerBtn:hover {
     background: #2980b9;
     transform: translateY(-1px);
     box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
 }

 #addfächerBtn:active {
     transform: translateY(0);
 }

 #stundenPlanBereich {
     display: flex;
     flex-direction: column;
     gap: 25px;
 }

 #stundenPlanBereich>section {
     background: white;
     border-radius: 8px;
     padding: 20px;
     box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
     transition: transform 0.2s ease, box-shadow 0.2s ease;
 }

 #stundenPlanBereich>section:hover {
     transform: translateY(-2px);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
 }

 ul {
     list-style-type: none;
 }

 li {
     padding: 12px 15px;
     margin-bottom: 8px;
     background: #f8f9fa;
     border-radius: 4px;
     border-left: 4px solid #3498db;
     transition: all 0.2s ease;
 }

 li:hover {
     background: #ecf0f1;
     transform: translateX(2px);
 }

 @media (max-width: 600px) {
     body {
         padding: 15px;
     }

     h1 {
         font-size: 1.6rem;
     }

     h2 {
         font-size: 1.2rem;
     }

     #stundenPlanBereich>section {
         padding: 15px;
     }

     li {
         padding: 10px 12px;
     }
 }

 /* Leere Tage-Stil */
 ul:empty::after {
     content: "Keine Fächer geplant";
     color: #bdc3c7;
     font-style: italic;
     padding: 15px;
     display: block;
     text-align: center;
 }

 /* Farbliche Variation für verschiedene Tage */
 #montag li {
     border-left-color: #3498db;
 }

 #dienstag li {
     border-left-color: #2ecc71;
 }

 #mittwoch li {
     border-left-color: #9b59b6;
 }

 #donnerstag li {
     border-left-color: #e67e22;
 }

 #freitag li {
     border-left-color: #e74c3c;
 }

 .dialog {
     display: none;
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background-color: rgba(0, 0, 0, 0.5);
     z-index: 1000;
     align-items: center;
     justify-content: center;
 }

 .dialog-inhalt {
     background: white;
     padding: 25px;
     border-radius: 10px;
     width: 90%;
     max-width: 400px;
     box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
 }

 .dialog-inhalt h3 {
     margin-bottom: 20px;
     color: #2c3e50;
     font-weight: 400;
 }

 .formular-gruppe {
     margin-bottom: 20px;
 }

 .formular-gruppe label {
     display: block;
     margin-bottom: 8px;
     color: #34495e;
     font-size: 0.95rem;
 }

 select {
     width: 100%;
     padding: 10px 12px;
     border: 1px solid #ddd;
     border-radius: 6px;
     font-size: 1rem;
     color: #333;
     background-color: #fff;
     transition: border-color 0.2s ease;
 }

 select:focus {
     outline: none;
     border-color: #3498db;
 }

 .dialog-buttons {
     display: flex;
     justify-content: flex-end;
     gap: 12px;
     margin-top: 25px;
     padding-top: 20px;
     border-top: 1px solid #eee;
 }

 .dialog-buttons button {
     padding: 10px 20px;
     border-radius: 6px;
     font-size: 0.95rem;
     cursor: pointer;
     transition: all 0.2s ease;
     border: none;
 }

 #abbrechenBtn {
     background: #f8f9fa;
     color: #7f8c8d;
     border: 1px solid #ddd;
 }

 #abbrechenBtn:hover {
     background: #e9ecef;
 }

 #hinzufuegenDialogBtn {
     background: #3498db;
     color: white;
 }

 #hinzufuegenDialogBtn:hover {
     background: #2980b9;
 }