*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background: #574c8f;
  color: #00ff41;
  font-family: monospace;
  font-size: 18px;
  line-height: 1.8;
  margin: 0;
  padding: 0;
  min-height: 100vh;
}


/* Window frame - CDE Motif style */
.window {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: #aeb2c3;
  padding: 4px;
  border-top: 3px solid #d4d7e3;
  border-left: 3px solid #d4d7e3;
  border-right: 3px solid #6b6e7a;
  border-bottom: 3px solid #6b6e7a;
  box-shadow: 0 0 0 1px #3a3a4a;
}

/* Title bar - CDE crimson/mauve */
.titlebar {
  background: #b24d7a;
  padding: 4px 5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  border-top: 2px solid #d888a8;
  border-left: 2px solid #d888a8;
  border-right: 2px solid #6e2f4c;
  border-bottom: 2px solid #6e2f4c;
  margin-bottom: 1px;
}

.titlebar-buttons-left,
.titlebar-buttons-right {
  display: flex;
  gap: 0;
}

.titlebar-btn {
  width: 18px;
  height: 18px;
  border-top: 2px solid #d888a8;
  border-left: 2px solid #d888a8;
  border-right: 2px solid #6e2f4c;
  border-bottom: 2px solid #6e2f4c;
  background: #b24d7a;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #fff;
  line-height: 1;
  cursor: default;
}

.titlebar-title {
  color: #fff;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 0.5px;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.5);
  flex: 1;
  text-align: center;
}

/* Main area: sidebar + terminal */
.main-area {
  display: flex;
  flex: 1;
  margin: 1px;
  gap: 0;
  min-height: 0;
}

/* Sidebar - CDE style panel */
.sidebar {
  width: 200px;
  flex-shrink: 0;
  background: #aeb2c3;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 4px;
  border-right: 2px solid #6b6e7a;
}

.sidebar-section {
  margin-bottom: 6px;
}

.sidebar-title {
  background: #718ba5;
  color: #fff;
  font-size: 11px;
  font-weight: bold;
  padding: 3px 8px;
  letter-spacing: 0.5px;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.4);
  border-top: 2px solid #9ab0c8;
  border-left: 2px solid #9ab0c8;
  border-right: 2px solid #465568;
  border-bottom: 2px solid #465568;
  margin-bottom: 3px;
}

.sidebar-panel {
  border-top: 2px solid #6b6e7a;
  border-left: 2px solid #6b6e7a;
  border-right: 2px solid #d4d7e3;
  border-bottom: 2px solid #d4d7e3;
  background: #9a9eae;
  padding: 2px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.sidebar-link {
  display: block;
  color: #1a1a2e;
  text-decoration: none;
  font-size: 13px;
  padding: 3px 8px;
  background: #aeb2c3;
  border-top: 1px solid #d4d7e3;
  border-left: 1px solid #d4d7e3;
  border-right: 1px solid #6b6e7a;
  border-bottom: 1px solid #6b6e7a;
}

.sidebar-link:hover {
  background: #bfc3d4;
}

.sidebar-tag {
  display: block;
  color: #1a1a2e;
  text-decoration: none;
  font-size: 13px;
  padding: 3px 8px;
  background: #aeb2c3;
  border-top: 1px solid #d4d7e3;
  border-left: 1px solid #d4d7e3;
  border-right: 1px solid #6b6e7a;
  border-bottom: 1px solid #6b6e7a;
  cursor: pointer;
}

.sidebar-tag:hover {
  background: #bfc3d4;
}

.sidebar-tag.active {
  background: #b24d7a;
  color: #fff;
  border-top: 1px solid #6e2f4c;
  border-left: 1px solid #6e2f4c;
  border-right: 1px solid #d888a8;
  border-bottom: 1px solid #d888a8;
}

/* Inner frame around terminal - sunken panel */
.terminal-frame {
  flex: 1;
  border-top: 3px solid #6b6e7a;
  border-left: 3px solid #6b6e7a;
  border-right: 3px solid #d4d7e3;
  border-bottom: 3px solid #d4d7e3;
  background: #0a0a0a;
  min-height: 0;
  overflow-y: auto;
}

/* Terminal content area */
.terminal {
  padding: 2rem 2.5rem;
  min-height: 60vh;
}

/* Content */
.content {
  text-shadow: 0 0 5px rgba(0, 255, 65, 0.3);
}

.content h1, .content h2, .content h3,
.content h4, .content h5, .content h6 {
  color: #00ff41;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.6);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.content h1 { font-size: 2rem; }
.content h2 { font-size: 1.5rem; }
.content h3 { font-size: 1.25rem; }

.content a {
  color: #5eff8a;
  text-decoration: none;
  border-bottom: 1px dashed #5eff8a;
}

.content a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(0, 255, 65, 0.8);
}

.content p {
  margin: 1.2rem 0;
}

.content ul, .content ol {
  padding-left: 2rem;
}

.content li {
  margin: 0.4rem 0;
}

.content li::marker {
  color: #00ff41;
}

/* Inline code */
.content code {
  background: #111;
  color: #5eff8a;
  padding: 0.2em 0.5em;
  border: 1px solid #1a3a1a;
  font-size: 0.95em;
}

/* Code blocks - sunken panel style */
.content pre {
  background: #050505;
  border-top: 3px solid #333;
  border-left: 3px solid #333;
  border-right: 3px solid #00aa30;
  border-bottom: 3px solid #00aa30;
  padding: 0;
  overflow: hidden;
  margin: 1.5rem 0;
}

.content pre::before {
  content: "output";
  display: block;
  background: #1a1a1a;
  color: #00aa30;
  font-size: 12px;
  padding: 3px 10px;
  border-bottom: 1px solid #333;
  letter-spacing: 1px;
}

.content pre code {
  display: block;
  background: none;
  border: none;
  padding: 1.2rem 1.5rem;
  color: #00ff41;
  overflow-x: auto;
  font-size: 0.95em;
  line-height: 1.6;
}

.content blockquote {
  border-left: 3px solid #00ff41;
  margin: 1.2rem 0;
  padding: 0.8rem 1.2rem;
  background: rgba(0, 255, 65, 0.03);
  color: #00cc33;
}

.content hr {
  border: none;
  border-top: 1px solid #1a3a1a;
  margin: 2.5rem 0;
}

.content strong {
  color: #5eff8a;
}

.content em {
  color: #00cc33;
  font-style: italic;
}

/* Hidden tag items */
.content li.hidden-tag {
  display: none;
}

/* Status bar - CDE front panel style */
.statusbar {
  background: #b24d7a;
  border-top: 2px solid #d888a8;
  border-left: 2px solid #d888a8;
  border-right: 2px solid #6e2f4c;
  border-bottom: 2px solid #6e2f4c;
  padding: 3px 8px;
  color: #fff;
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  margin-top: 1px;
}

.statusbar span {
  border-top: 2px solid #6e2f4c;
  border-left: 2px solid #6e2f4c;
  border-right: 2px solid #d888a8;
  border-bottom: 2px solid #d888a8;
  padding: 1px 8px;
  background: #9a3d66;
  color: #f0d0e0;
}

.statusbar-link {
  color: #f0d0e0;
  text-decoration: none;
  border: none;
}

.statusbar-link:hover {
  color: #fff;
  text-shadow: none;
}

/* Resize grip */
.window::after {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  float: right;
  margin-top: -16px;
  margin-right: 0;
  background:
    linear-gradient(135deg,
      transparent 30%,
      #d4d7e3 30%, #d4d7e3 40%,
      #6b6e7a 40%, #6b6e7a 50%,
      transparent 50%,
      transparent 60%,
      #d4d7e3 60%, #d4d7e3 70%,
      #6b6e7a 70%, #6b6e7a 80%,
      transparent 80%
    );
}

/* Responsive */
@media (max-width: 700px) {
  .window {
    border-width: 2px;
  }

  .main-area {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
    border-right: none;
    border-bottom: 2px solid #6b6e7a;
  }

  .sidebar-section {
    flex: 1;
    min-width: 150px;
    margin-bottom: 0;
  }

  .terminal {
    padding: 1.2rem 1rem;
  }

  .content h1 { font-size: 1.6rem; }
  .content h2 { font-size: 1.3rem; }
}