/* Prosty reset */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(120deg, #f3f9ff, #ddefff);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    transition: background 0.3s ease, color 0.3s ease;
  }
  
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(15px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* ------- HEADER ------- */
  header {
    background-color: #72a6ff;
    color: #fff;
    padding: 10px 20px;
    display: flex;
    justify-content: flex-end; /* przycisk w prawym górnym rogu */
    align-items: center;
  }
  
  header button {
    background-color: #72a6ff;
    color: #fff;
    border: 1px solid #fff;
    border-radius: 8px;
    font-size: 14px;
    padding: 8px 16px;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
  }
  
  header button:hover {
    background-color: #5e90e7;
    transform: scale(1.03);
  }
  
  /* ------- SEKCJA LOGOWANIA ------- */
  .section {
    display: none; /* Ukryte domyślnie */
    padding: 20px;
    flex: 1;
  }
  
  #loginSection {
    display: block; /* Widoczna na starcie */
    background-color: #ffffff;
    max-width: 400px;
    width: 90%;
    max-height: 400px;
    height: 100%;
    padding: 20px 20px;
    border-radius: 12px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    animation: fadeIn 0.6s ease;
    text-align: center;
    margin: 80px auto 20px auto; /* margines, by nie wchodzić na header */
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  #loginSection h1 {
    margin-bottom: 15px;
    color: #333;
    transition: color 0.3s ease;
  }
  
  #loginForm label {
    display: block;
    margin: 10px 0 5px 0;
    color: #444;
    transition: color 0.3s ease;
  }
  
  #loginForm input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  }
  
  #loginForm input:focus {
    border-color: #72a6ff;
    outline: none;
  }
  
  #loginForm button {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    background: #72a6ff;
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background 0.3s, transform 0.2s;
    margin-top: 10px;
    width: 100%;
  }
  
  #loginForm button:hover {
    background: #5e90e7;
    transform: scale(1.02);
  }
  
  #loginError {
    margin-top: 10px;
    color: red;
    font-weight: 500;
    transition: color 0.3s ease;
  }
  
  /* ------- PRZYCISKI REJESTRACJI ------- */
  #showRegisterFormBtn {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    color: white;
    font-weight: bold;
    transition: background 0.3s, transform 0.2s;
    margin-top: 10px;
    display: block; /* Centrowanie */
    width: 100%; /* Dostosowanie rozmiaru */
  }
  
  #showRegisterFormBtn:hover {
    transform: scale(1.02);
  }
  
  /* ------- SEKCJA REJESTRACJI ------- */
  #registerSection {
    display: none; /* Ukryte domyślnie */
    background-color: #ffffff;
    max-width: 400px;
    max-height: 450px;
    height: 90%;
    width: 90%;
    padding: 30px 20px;
    border-radius: 12px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    animation: fadeIn 0.6s ease;
    text-align: center;
    margin: 80px auto 20px auto;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  #registerSection h1 {
    margin-bottom: 20px;
    color: #333;
    transition: color 0.3s ease;
  }
  
  #registerForm label {
    display: block;
    margin: 10px 0 5px 0;
    color: #444;
    transition: color 0.3s ease;
  }
  
  #registerForm input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  }
  
  #registerForm input:focus {
    border-color: #28a745;
    outline: none;
  }
  
  #registerForm button[type="submit"] {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background 0.3s, transform 0.2s;
    margin-top: 10px;
    width: 100%;
  }
  
  #registerForm button[type="submit"]:hover {

    transform: scale(1.02);
  }
  
  #registerForm .close-form-btn {
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    background-color: #dc3545; /* Czerwony kolor */
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background 0.3s, transform 0.2s;
    margin-top: 10px;
    width: 100%; /* Taki sam rozmiar jak inne przyciski */
  }
  
  #registerForm .close-form-btn:hover {
    background-color: #c82333; /* Ciemniejszy czerwony na hover */
    transform: scale(1.02);
  }
  
  #registerError {
    margin-top: 10px;
    color: red;
    font-weight: 500;
    transition: color 0.3s ease;
  }
  
  #registerSuccess {
    margin-top: 10px;
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
    padding: 10px;
    border: 1px solid;
    border-radius: 4px;
    display: none; /* Ukryte domyślnie */
    font-weight: 500;
    transition: color 0.3s ease, background-color 0.3s ease;
  }
  
  /* ------- PANEL ADMINISTRACYJNY ------- */
  #adminPanel {
    background-color: #ffffff;
    max-width: 1000px;
    width: 90%;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    animation: fadeIn 0.6s ease;
    margin: 20px auto;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  #adminPanel h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
    transition: color 0.3s ease;
  }
  
  .buttons-container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    gap: 10px;
  }
  
  .btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background-color: #72a6ff;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
  }
  
  .btn:hover {
    background-color: #5e90e7;
    transform: scale(1.02);
  }
  
  .secondary-btn {
    background-color: #28a745; /* Zielony kolor */
  }
  
  .secondary-btn:hover {
    background-color: #218838;
  }
  
  .form-box {
    margin-bottom: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); /* Dodanie głębi */
    padding: 20px;
    border-radius: 8px;
    background-color: #f9f9f9;
    animation: fadeIn 0.6s ease;
  }
  
  .form-box h2 {
    text-align: center;
    margin-bottom: 15px;
    color: #333;
    transition: color 0.3s ease;
  }
  
  .form-box label {
    display: block;
    margin: 10px 0 5px 0;
    color: #444;
    transition: color 0.3s ease;
  }
  
  .form-box input,
  .form-box select {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  }
  
  .form-box input:focus,
  .form-box select:focus {
    border-color: #72a6ff;
    outline: none;
  }
  
  .form-box button[type="submit"],
  .form-box .close-form-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    background: #72a6ff;
    color: #fff;
    font-weight: 600;
    letter-spacing: 1px;
    transition: background 0.3s, transform 0.2s;
    margin-right: 10px;
  }
  
  .form-box button[type="submit"]:hover,
  .form-box .close-form-btn:hover {
    background: #5e90e7;
    transform: scale(1.02);
  }
  
  .form-box .close-form-btn {
    background-color: #dc3545; /* Czerwony kolor */
  }
  
  .form-box .close-form-btn:hover {
    background-color: #c82333;
  }
  
  /* ------- TABELA ------- */
  table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
  }
  
  thead {
    background-color: #72a6ff;
    color: #fff;
  }
  
  th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  th {
    font-weight: 600;
  }
  
  tr:last-child td {
    border-bottom: none;
  }
  
  #errorMessage {
    text-align: center;
    color: red;
    margin-top: 20px;
    font-weight: 500;
    transition: color 0.3s ease;
  }
  
  /* ------- POWIADOMIENIA ------- */

  .notifications-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  .notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #333;
    color: #fff;
    padding: 15px 20px;
    border-radius: 8px;
    display: block !important;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    opacity: 0 !important;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  
  .notification.show {
    opacity: 1 !important;
    transform: translateY(0);
  }
  
  .notification.success {
    background-color: #4caf50;
  }
  
  .notification.error {
    background-color: #f44336;
  }
  
  
  
  /* ------- TRYB CIEMNY ------- */
  body.dark-mode {
    background: linear-gradient(120deg, #2f2a51, #34324a);
    color: #eee;
  }
  
  /* Header w trybie ciemnym */
  body.dark-mode header {
    background-color: #4b2e87;
  }
  
  body.dark-mode header button {
    background-color: #4b2e87;
    border: 1px solid #cfc0f5;
  }
  
  body.dark-mode header button:hover {
    background-color: #633ead;
  }
  
  /* Sekcje w trybie ciemnym */
  body.dark-mode #loginSection,
  body.dark-mode #adminPanel,
  body.dark-mode #addAppointmentFormBox,
  body.dark-mode #registerSection {
    background-color: #3c336a;
    color: #dfdff6;
  }
  
  body.dark-mode #loginSection h1,
  body.dark-mode #adminPanel h1,
  body.dark-mode #registerSection h1,
  body.dark-mode .form-box h2 {
    color: #c4c4e4;
  }
  
  body.dark-mode #loginForm label,
  body.dark-mode #addAppointmentForm label,
  body.dark-mode #registerForm label {
    color: #dfdff6;
  }
  
  body.dark-mode #loginForm input,
  body.dark-mode #loginForm select,
  body.dark-mode #addAppointmentForm input,
  body.dark-mode #addAppointmentForm select,
  body.dark-mode #registerForm input,
  body.dark-mode #registerForm select {
    background-color: #4b4485;
    color: #dfdff6;
    border-color: #746fb4;
  }
  
  body.dark-mode #loginForm input:focus,
  body.dark-mode #loginForm select:focus,
  body.dark-mode #addAppointmentForm input:focus,
  body.dark-mode #addAppointmentForm select:focus,
  body.dark-mode #registerForm input:focus,
  body.dark-mode #registerForm select:focus {
    border-color: #a099d9;
  }
  
  body.dark-mode #loginForm button,
  body.dark-mode #registerForm button[type="submit"],
  body.dark-mode #adminPanel .btn,
  body.dark-mode .form-box button[type="submit"],
  body.dark-mode .form-box .close-form-btn {
    background-color: #4b2e87;
  }
  
  body.dark-mode #loginForm button:hover,
  body.dark-mode #registerForm button[type="submit"]:hover,
  body.dark-mode #adminPanel .btn:hover,
  body.dark-mode .form-box button[type="submit"]:hover,
  body.dark-mode .form-box .close-form-btn:hover {
    background-color: #633ead;
  }
  
  body.dark-mode #loginError,
  body.dark-mode #registerError,
  body.dark-mode #errorMessage {
    color: #ff9e9e;
  }
  
  body.dark-mode #registerSuccess {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
  }
  
  body.dark-mode .btn {
    background-color: #4b2e87;
  }
  
  body.dark-mode .btn:hover {
    background-color: #633ead;
  }
  
  body.dark-mode thead {
    background-color: #4b2e87;
  }
  
  body.dark-mode th, 
  body.dark-mode td {
    border-bottom: 1px solid #5f5993;
  }
  
  body.dark-mode tr:nth-child(odd) td {
    background-color: #48406f;
  }
  
  body.dark-mode tr:nth-child(even) td {
    background-color: #423a67;
  }
  
  /* Stylizacja formularza w trybie ciemnym */
  body.dark-mode .form-box {
    background-color: #4b4485;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  }
  
  body.dark-mode .form-box label {
    color: #dfdff6;
  }

  
/* Panel użytkownika */
.user-panel {
    background-color: #3c336a; /* Kolor panelu */
    max-width: 800px;
    width: 90%;
    padding: 20px;
    border-radius: 15px; /* Zaokrąglone rogi */
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25); /* Efekt głębi */
    margin: 20px auto;
    transition: background-color 0.3s ease, color 0.3s ease;
  }
  
  .user-panel h2 {
    text-align: center;
    color: #dfdff6;
    margin-bottom: 20px;
  }
  
  /* Tabela w panelu użytkownika */
  .user-panel table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
  }
  
  .user-panel thead {
    background-color: #4b2e87;
    color: #fff;
  }
  .notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    max-width: 300px;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0px 2px 10px rgba(0, 0, 0, 0.2);
    color: white;
    display: none;
  }
  footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: #555;
    transition: color 0.3s ease;
  }
  
  body.dark-mode footer {
    color: #dfdff6;
  }
  .notification.success {
    background-color: #28a745;
  }
  
  .notification.error {
    background-color: #dc3545;
  }
  
  .user-panel th, 
  .user-panel td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #5f5993;
    color: #dfdff6;
  }
  
  .user-panel tr:nth-child(even) td {
    background-color: #48406f;
  }
  
  .user-panel tr:nth-child(odd) td {
    background-color: #423a67;
  }

  /* Powiadomienie */
  .notification {
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.3s ease-out;
    color: #fff;
    font-size: 14px;
    font-weight: bold;
  }
  
  /* Typy powiadomień */
  .notification.success {
    background-color: #4caf50; /* Zielony */
  }
  
  .notification.error {
    background-color: #f44336; /* Czerwony */
  }
  
  .notification.info {
    background-color: #2196f3; /* Niebieski */
  }
  
  /* Tryb ciemny - kolory powiadomień */
  body.dark-mode .notification.success {
    background-color: #388e3c;
  }
  
  body.dark-mode .notification.error {
    background-color: #d32f2f;
  }
  
  body.dark-mode .notification.info {
    background-color: #1976d2;
  }
  
  /* Animacja fade-in */
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }