* {
  margin: 0;
  padding: 0;

  box-sizing: border-box;
}

:root {
  --spacing: 1rem;
  --spacing2: 0.75rem;
  --border-radius: 5px;
  --gap-spacing: 0.5rem;
  --font-color: #222;
  --font-size: 1rem;
  --full-width: 100%;

}

body {
  background: #f5f5f5;
  color: var(--font-color);
  font-family: sans-serif;
  padding: var(--spacing);
}

/* Authentication Section */
.login-container,
.registration-container {
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  margin: 2rem auto;
  max-width: 400px;
  padding: var(--spacing);
}

#login-form,
#registration-form {
  display: flex;
  flex-direction: column;
}

#login-form h2,
#registration-form h2 {
  color: var(--font-color);
  font-size: 1.5rem;
  font-weight: 600;
}

#login-form label
#registration-form label {
  color: var(--font-color);
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

#login-form input[type="email"],
#login-form input[type="password"],
#registration-form input[type="email"],
#registration-form input[type="password"], 
#registration-form input[type="confirm-password"] {
  border: 1px solid #ccc;
  border-radius: var(--border-radius);
  font-size: var(--font-size);
  margin-bottom: var(--spacing);
  padding: 0.4rem 0.6rem;
  width: var(--full-width);
}

#login-form p,
#registration-form p {
  font-size: 0.9rem;
  margin-bottom: var(--spacing);
  text-align: center;
}

#login-form p button,
#registration-form p button,
#logout-btn {
  background: none;
  border: none;
  color: #3366cc;
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0;
  text-decoration: underline;
}

#logout-btn:hover {
  color: #004499;
  text-decoration: none;
}

/* Dashboard */
.dashboard {
  background: #f9f9f9;
  padding: var(--spacing);
  margin-bottom: var(--spacing);
  border-radius: var(--border-radius);
}

.dashboard h1 {
  color: #444;
  font-size: 1.25rem;
  font-weight: normal;
  margin-top: 0.5rem;
  text-align: center;
}

/* === Header === */
/* User Control */
.user-controls {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--gap-spacing);

  margin-left: auto;
  width: var(--full-width);
}

.user-controls span,
.user-controls button {
  white-space: nowrap;
}

/* Heading */
.main-container h2 {
  color: #111;
  font-size: 1.6rem;
  font-weight: bold;
  margin-bottom: var(--spacing);
  padding: 0;
}

/* Form Containers */
.main-container {
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  margin: 0 auto;
  padding: var(--spacing);
  width: 800px;
}

form {
  background: #fff;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

form h2 {
  margin-bottom: var(--spacing);
}

/* === Inputs and labels === */
.input-group,
form label {
  display: block;
  margin-bottom: 10px;
}

.input-group label {
  display: flex;
  align-items: baseline;
  gap: var(--gap-spacing);

  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* Drop-down Menu */
#options {
  margin-bottom: 1.5rem;
}

/* Inputs */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
select {
  flex: 1;

  background: #fff;
  border: 1px solid #ccc;
  border-radius: var(--border-radius);
  font-size: var(--font-size);
  padding: 0.4rem 0.6rem;
  width: var(--full-width);
}

button {
  background: #ccddee;
  border: none;
  border-radius: var(--border-radius);
  color: var(--font-color);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.5rem 1rem;
  transition: background-color 0.5s ease;
}

button:hover {
  background: #b5cce0;
}

.main-container button {
  margin-top: 10px;
}

/* QR Image */
.qrImage-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;

  background: #fafafa;
  border: 1px dashed #ccc;
  border-radius: var(--border-radius);
  margin-top: var(--spacing);
  min-height: 160px;
  text-align: center;
}

.qr-placeholder {
  
  color: #888;
  font-size: 0.9rem;
}

.qr-image {
  display: block;
  
  height: 150px;
  margin: auto;
  object-fit: contain;
  width: 150px;
}

.qr-image:not(.hidden) + .qr-placeholder {
  display: none;
}

/* Utility classes */
.hidden {
  display: none !important;
}

/* Media Queries */
@media (max-width: 767px) {
  .main-container {
    width: var(--full-width);
    padding: var(--spacing2);
  }

  .login-container,
  .registration-container {
    margin: 1rem auto;
    padding: var(--spacing2);
    width: var(--full-width);
    max-width: 100%;
  }

  .dashboard {
    padding-left: 0;
    padding-right: 0;
  }

  .main-container h2,
  .dashboard h1 {
    font-size: 1.3rem;
    text-align: center;
  }

  .dashboard h1 {
    padding: 0 var(--spacing2);
  }

  .user-controls {
    justify-content: flex-end;
    flex-wrap: nowrap;
    gap: var(--gap-spacing);

    padding-right: var(--spacing);
    width: var(--full-width);
  }

  button {
    width: var(--full-width);
  }

  .user-controls button {
    width: auto;
  }

  .input-group label,
  form label {
    font-size: var(--font-size);
  }

  button {
    width: var(--full-width);
  }

  .qrImage-container {
    margin-top: var(--spacing);
  }

  .qr-image {
    margin: 0 auto;
  }
}

@media (max-width: 414px) {
  .dashboard {
    padding: var(--spacing2);
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .dashboard h1,
  .main-container,
  .user-controls {
    width: var(--full-width);
  }

  .dashboard h1{
    font-size: var(--font-size);
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
    text-align: center;
  }

  .main-container {
    padding: var(--spacing);
  }

  .user-controls {
    justify-content: flex-end;
    align-items: center;

    margin-bottom: 0.5rem;
    padding-right: var(--spacing);
  }

  .user-controls,
  #lotgout-btn {
    font-size: 0.85rem;
  }

  .user-controls span,
  .user-controls button {
    font-size: 0.85rem;
    white-space: nowrap;
  }
}