:root {
  --bg-color: #f4f7f9;
  --text-color: #1a1a1a;
  --panel-bg: #ffffff;
  --panel-border: #dce1e6;
  --header-bg: #ffffff;
  --button-bg: #e9ecef;
  --button-hover-bg: #dce1e6;
  --button-disabled-bg: #e9ecef;
  --button-disabled-text: #adb5bd;
  --accent-color: #007bff;
  --font-mono: "SF Mono", "Consolas", "Menlo", monospace;
}

[data-theme="dark"] {
  --bg-color: #1a1c20;
  --text-color: #e0e0e0;
  --panel-bg: #25282e;
  --panel-border: #3a3f4b;
  --header-bg: #25282e;
  --button-bg: #3a3f4b;
  --button-hover-bg: #4a505c;
  --button-disabled-bg: #2c3038;
  --button-disabled-text: #6c757d;
  --accent-color: #4dabf7;
}

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

html,
body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

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

.main-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1rem;
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
}

.main-header h1 {
  font-size: 1.2rem;
}

.container {
  flex-grow: 1;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  overflow: hidden;
}

@media (min-width: 992px) {
  .container {
    grid-template-columns: 1fr 2fr;
    grid-template-rows: 1fr;
  }
}

.panel {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background-color 0.3s, border-color 0.3s;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--panel-border);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.panel-controls {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

button,
select {
  background-color: var(--button-bg);
  color: var(--text-color);
  border: 1px solid var(--panel-border);
  padding: 0.4rem 0.8rem;
  border-radius: 5px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

button:hover,
select:hover {
  background-color: var(--button-hover-bg);
}

button:disabled {
  background-color: var(--button-disabled-bg);
  color: var(--button-disabled-text);
  cursor: not-allowed;
  border-color: var(--panel-border);
}

#theme-switcher {
  font-size: 1.2rem;
  padding: 0.2rem 0.5rem;
  background: none;
  border: none;
}
#theme-switcher:disabled {
  background: none;
}

#code-editor {
  flex-grow: 1;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--panel-bg);
  border: none;
  padding: 1rem;
  resize: none;
  outline: none;
}

.viewer-settings {
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  row-gap: 0.75rem;
  font-size: 0.9rem;
}

.setting-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.setting-group > label {
  font-weight: 500;
}

#viewer-output-wrapper {
  flex-grow: 1;
  overflow: auto;
  background-image: linear-gradient(
      45deg,
      var(--panel-border) 25%,
      transparent 25%
    ),
    linear-gradient(-45deg, var(--panel-border) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--panel-border) 75%),
    linear-gradient(-45deg, transparent 75%, var(--panel-border) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  cursor: grab;
}

#viewer-output-wrapper:active {
  cursor: grabbing;
}

#viewer-output {
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 100%;
  min-height: 100%;
}

#viewer-output svg {
  display: block;
  max-width: none;
  background-color: var(--panel-bg);
}

#viewer-output .node,
#viewer-output .cluster {
  cursor: pointer;
}

.main-footer {
  padding: 0.8rem 1rem;
  text-align: center;
  font-size: 0.8rem;
  color: #6c757d;
  flex-shrink: 0;
}

.main-footer a {
  color: var(--accent-color);
  text-decoration: none;
}
.main-footer a:hover {
  text-decoration: underline;
}

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.6);
  animation: fadeIn 0.3s;
}

.modal-content {
  background-color: var(--panel-bg);
  color: var(--text-color);
  margin: 15% auto;
  padding: 25px;
  border: 1px solid var(--panel-border);
  width: 90%;
  max-width: 600px;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  position: relative;
  animation: slideIn 0.3s ease-out;
}

.modal-content h2 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #e74c3c;
}

.close-button {
  color: var(--text-color);
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 28px;
  font-weight: bold;
  opacity: 0.5;
}

.close-button:hover,
.close-button:focus {
  opacity: 1;
  text-decoration: none;
  cursor: pointer;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.main-footer a:hover {
  text-decoration: underline;
}