* {
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, #0f0f23 0%, #1a1a2e 50%, #16213e 100%);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #e8e8e8;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  margin-left: 260px;
}

/* Sidebar styling */
#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 260px;
  height: 100vh;
  background: linear-gradient(180deg, #1e1e2f 0%, #252540 100%);
  color: white;
  padding: 30px 25px;
  box-shadow: 4px 0 15px rgba(0,0,0,0.3);
  border-right: 2px solid #3a3a5c;
}

#sidebar h3 {
  margin-top: 0;
  font-size: 28px;
  color: #ffd700;
  text-align: center;
  margin-bottom: 30px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

#sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

#sidebar li {
  margin-bottom: 15px;
}

#sidebar a {
  color: #c8c8c8;
  text-decoration: none;
  font-weight: 500;
  padding: 12px 15px;
  border-radius: 8px;
  display: block;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

#sidebar a:hover {
  background-color: rgba(255, 215, 0, 0.1);
  border-left-color: #ffd700;
  color: #ffd700;
  transform: translateX(5px);
}

/* Main content area */
#auth-area, #app-area {
  max-width: 500px;
  margin: 50px auto;
  padding: 40px;
  background: linear-gradient(145deg, #1e1e2f 0%, #2a2a3e 100%);
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
  border: 1px solid #3a3a5c;
}

#otsikko {
  font-size: 26px;
  font-weight: 600;
  color: #ffd700;
  text-align: center;
  margin-bottom: 30px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
  line-height: 1.4;
}

/* Event date area */
#event-date-area {
  text-align: center;
  margin: 30px auto;
  padding: 20px;
  background: linear-gradient(145deg, #2a2a3e 0%, #1e1e2f 100%);
  border-radius: 15px;
  max-width: 500px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

#event-date-text {
  color: #ffd700;
  font-size: 24px;
  margin: 0;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/* Form styling */
input {
  width: 100%;
  padding: 15px;
  margin: 10px 0;
  border-radius: 10px;
  border: 2px solid #3a3a5c;
  background: #2a2a3e;
  color: #e8e8e8;
  font-size: 16px;
  transition: all 0.3s ease;
}

input:focus {
  outline: none;
  border-color: #ffd700;
  box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

input::placeholder {
  color: #888;
}

/* Button styling */
button {
  background: linear-gradient(145deg, #ffd700 0%, #ffed4a 100%);
  color: #1e1e2f;
  padding: 15px 20px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  width: 100%;
  font-weight: 600;
  font-size: 16px;
  margin: 10px 0;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(255, 215, 0, 0.3);
}

button:hover {
  background: linear-gradient(145deg, #ffed4a 0%, #ffd700 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(255, 215, 0, 0.4);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  background: linear-gradient(145deg, #4a4a5c 0%, #3a3a4c 100%);
  color: #888;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Slot buttons */
#slots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 15px;
  margin: 20px 0;
}

#slots div {
  background: linear-gradient(145deg, #2a2a3e 0%, #1e1e2f 100%);
  padding: 20px;
  border-radius: 12px;
  border: 1px solid #3a3a5c;
  text-align: center;
  transition: all 0.3s ease;
}

#slots div:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255, 215, 0, 0.2);
}

#slots button {
  margin: 10px 0 0 0;
  font-size: 14px;
  padding: 12px 15px;
}

/* My slot area */
#my-slot {
  margin-top: 30px;
  padding: 25px;
  background: linear-gradient(145deg, #2a3e2a 0%, #1e2f1e 100%);
  color: #a8d8a8;
  border-radius: 15px;
  text-align: center;
  border: 1px solid #4a6a4a;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

#my-slot strong {
  color: #90ee90;
  font-size: 18px;
}

/* Admin and logout buttons */
#admin-reset {
  background: linear-gradient(145deg, #dc3545 0%, #c82333 100%);
  color: white;
  margin-top: 20px;
}

#admin-reset:hover {
  background: linear-gradient(145deg, #c82333 0%, #dc3545 100%);
}

#logout {
  background: linear-gradient(145deg, #6c757d 0%, #5a6268 100%);
  color: white;
  margin-top: 15px;
}

#logout:hover {
  background: linear-gradient(145deg, #5a6268 0%, #6c757d 100%);
}

/* Edit date area */
#edit-date-area {
  background: linear-gradient(145deg, #3e2a3e 0%, #2f1e2f 100%);
  padding: 25px;
  border-radius: 15px;
  margin: 30px auto;
  max-width: 500px;
  border: 1px solid #5c3a5c;
}

#edit-date-area input {
  margin-bottom: 15px;
}

/* Content area styling */
#content-area {
  text-align: center;
  margin-bottom: 30px;
}

#content-area h2 {
  color: #ffd700;
  font-size: 24px;
  margin-bottom: 20px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

#content-area p {
  color: #c8c8c8;
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 15px;
}

/* Auth views */
#login-view, #register-view {
  background: linear-gradient(145deg, #2a2a3e 0%, #1e1e2f 100%);
  padding: 30px;
  border-radius: 15px;
  margin: 20px 0;
  border: 1px solid #3a3a5c;
}

#login-view h3, #register-view h3 {
  color: #ffd700;
  text-align: center;
  margin-bottom: 25px;
  font-size: 20px;
}

#login-view p, #register-view p {
  text-align: center;
  margin-top: 20px;
  color: #c8c8c8;
}

#login-view a, #register-view a {
  color: #ffd700;
  text-decoration: none;
  font-weight: 600;
}

#login-view a:hover, #register-view a:hover {
  text-decoration: underline;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    margin-left: 0;
  }
  
  #sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  #auth-area, #app-area {
    margin: 20px;
    padding: 25px;
  }
  
  #slots {
    grid-template-columns: 1fr;
  }
  
  #otsikko {
    font-size: 20px;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

#auth-area, #app-area {
  animation: fadeIn 0.5s ease;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #1e1e2f;
}

::-webkit-scrollbar-thumb {
  background: #ffd700;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #ffed4a;
}

/* Hamburger-nappi */
#menu-toggle {
  display: none;
  position: fixed;
  top: 15px;
  left: 15px;
  font-size: 28px;
  color: #ffd700;
  background-color: #1e1e2f;
  padding: 10px 15px;
  border-radius: 8px;
  z-index: 999;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0,0,0,0.5);
}

/* Mobiilissa näytetään menu-nappi ja piilotetaan sidebar */
@media (max-width: 768px) {
  #menu-toggle {
    display: block;
  }

  #sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  #sidebar.open {
    transform: translateX(0);
  }

  body {
    margin-left: 0;
  }
}