body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

.container {
    margin: 5px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-top: 3px;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    margin-top: 10px;
}

input, select, button, textarea {
    margin-top: 5px;
    padding: 10px;
    font-size: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    padding: 10px;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 10px;
    align-items: center;
    width: 20%;
}

button:hover {
    background-color: #0056b3;
}

.output-div {
    margin-top: 20px;
    padding: 10px;
    background-color: #e9ecef;
    border-radius: 5px;
    white-space: pre-wrap;
    overflow: auto;
}

.output-div h1, .output-div h2, .output-div h3 {
    color: #0056b3;
    margin: 2px 0;
}

.output-div ul {
    list-style-type: disc;
    padding-left: 20px;
}
.output-div code {
    background-color: #f8f9fa;
    padding: 2px 4px;
    border-radius: 3px;
    font-family: monospace;
}

#markmapContainer {
    height: 800px;
}

.markmap {
    position: relative;
}
.markmap > svg {
    width: 100%;
    height: 800px;
}

#loading {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* HTML: <div class="loader"></div> */
.loader {
    width: 40px;
    aspect-ratio: 1;
    color: #514b82;
    background: repeating-conic-gradient(from -47deg,#0000 0deg, currentColor 1deg 91deg,#0000 94deg 180deg);
    display: flex;
    animation: l12-0 2s infinite linear;
  }
  .loader::before,
  .loader::after {
    content: "";
    flex: 1;
    background: currentColor;
    clip-path: polygon(0 0,100% 50%, 0 100%);
    animation: l12 1s infinite alternate;
    transform-origin: bottom left;
  }
  .loader::after {
    clip-path: polygon(100% 0,100% 100%,0 50%);
    transform-origin: top right;
  }
  @keyframes l12-0 {
      0%,49.9% {transform:scaleX( 1)}
      50%,100% {transform:scaleX(-1)}
  }
  @keyframes l12 {
      0%, 20%  {transform:rotate(0deg)}
      80%,100% {transform:rotate(-270deg)}
  }

textarea {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    resize: vertical;
}

.error-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ff4444;
    color: white;
    padding: 15px 30px;
    border-radius: 5px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s, visibility 0.5s;
}

.error-message.show {
    opacity: 1;
    visibility: visible;
}

.form-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1em;
}

.form-row label {
    margin-right: 5px;
}

.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.toggle-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
}

.toggle-btn:hover {
    background: #0069d9;
}

.form-collapsed #pdfForm {
    display: none;
}

.form-collapsed .output-div {
    margin-top: 0;
}

#downloadPdfBtn:disabled {
    cursor: not-allowed;
    background-color: #eee;
    color: #aaa;
}

#renderCanvas {
    display: none;
}