:root {
  color-scheme: light;
  --md-primary: #6750A4;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #EADDFF;
  --md-on-primary-container: #21005D;
  --md-secondary: #625B71;
  --md-on-secondary: #FFFFFF;
  --md-surface: #FFFBFE;
  --md-on-surface: #1C1B1F;
  --md-surface-variant: #E7E0EC;
  --md-on-surface-variant: #49454F;
  --md-outline: #79747E;
  --md-error: #B3261E;
  --md-on-error: #FFFFFF;
  --md-shadow: 0, 0, 0;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Roboto, ui-sans-serif, system-ui, -apple-system, Segoe UI, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.site-header {
  padding: 16px 24px;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: 0 2px 4px rgba(var(--md-shadow), 0.2);
}
.site-header h1 { margin: 0; font-size: 22px; font-weight: 700; letter-spacing: .2px; }
.site-header p { margin: 0; opacity: .85; }
.layout { display: grid; grid-template-columns: 280px 1fr; min-height: calc(100vh - 110px); }
.sidebar {
  border-right: 1px solid var(--md-surface-variant);
  padding: 16px;
  background: var(--md-surface);
}
.brand { color: var(--md-on-surface-variant); margin-bottom: 12px; font-weight: 500; }
.search { margin-bottom: 12px; }
.search input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--md-surface-variant);
  border-radius: 12px;
  background: var(--md-surface);
  color: var(--md-on-surface);
  outline: none;
  position: relative;
}
.search { position: relative; }
.search .clear-icon {
  position: absolute !important;
  right: 10px;
  top: 8px;
  width: 16px;
  height: 16px;
  font-size: 8pt;
  border: 1px solid var(--md-outline);
  border-radius: 50%;
  background: var(--md-surface);
  color: var(--md-on-surface);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: box-shadow .2s ease, background .2s ease, border-color .2s ease;
}
.search .clear-icon.show { display: inline-flex; }
.search .clear-icon:hover { background: rgba(103, 80, 164, 0.08); }
.search .clear-icon:active { box-shadow: 0 1px 3px rgba(var(--md-shadow), 0.18); }
.menu { display: flex; flex-direction: column; gap: 8px; }
.menu-group { margin-bottom: 12px; }
.menu-group-title { font-weight: 600; color: var(--md-on-surface); margin: 10px 0 6px; display: flex; align-items: center; gap: 8px; }
.menu-group-title::before { content: "▸"; color: var(--md-on-surface-variant); transition: transform .2s ease; }
.menu-group:not(.collapsed) .menu-group-title::before { transform: rotate(90deg); }
.menu-subgroup { cursor: pointer; user-select: none; color: var(--md-on-surface-variant); margin: 6px 0 4px; padding-left: 8px; display: flex; align-items: center; gap: 6px; }
.menu-subgroup.toggleable::before { content: "▸"; color: var(--md-on-surface-variant); transition: transform .2s ease; }
.menu-subgroup.toggleable.open::before { transform: rotate(90deg); }
.menu-group-title { cursor: pointer; user-select: none; }
.menu-subgroup-items { display: flex; flex-direction: column; gap: 6px; padding-left: 24px; }
.menu-group.collapsed .menu-subgroup, .menu-group.collapsed .menu-subgroup-items { display: none; }
.nav-item {
  color: var(--md-on-surface);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 12px;
  background: transparent;
  border: 1px solid transparent;
  position: relative; overflow: hidden;
  margin-left: 16px;
  display: block;
}
.nav-item:hover { background: rgba(103, 80, 164, 0.08); }
.nav-item.active { background: var(--md-primary-container); color: var(--md-on-primary-container); border-color: var(--md-primary-container); }
#content { padding: 24px; max-width: 1100px; }
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.panel {
  background: var(--md-surface);
  border: 1px solid var(--md-surface-variant);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(var(--md-shadow), 0.08), 0 2px 6px rgba(var(--md-shadow), 0.06);
}
label { display: block; margin-bottom: 8px; color: var(--md-on-surface-variant); }
textarea {
  width: 100%;
  min-height: 140px;
  resize: vertical;
  padding: 10px;
  background: var(--md-surface);
  color: var(--md-on-surface);
  border: 1px solid var(--md-surface-variant);
  border-radius: 12px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
textarea:focus {
  border-color: var(--md-primary);
  box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.2);
}
.actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.inline-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}
button, .btn {
  appearance: none;
  border: 1px solid var(--md-outline);
  background: var(--md-surface);
  color: var(--md-on-surface);
  padding: 10px 14px;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 500;
  transition: box-shadow .2s ease, background .2s ease, border-color .2s ease;
  position: relative;
  overflow: hidden;
}
.btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
  border-color: var(--md-primary);
  box-shadow: 0 2px 4px rgba(var(--md-shadow), 0.2);
}
.btn-outlined {
  background: transparent;
  border-color: var(--md-outline);
  color: var(--md-on-surface);
}
.btn:hover { box-shadow: 0 3px 6px rgba(var(--md-shadow), 0.22); }
.btn:active { box-shadow: 0 1px 3px rgba(var(--md-shadow), 0.18); }
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  background: rgba(103, 80, 164, 0.25);
  animation: ripple .6s ease-out forwards;
}
@keyframes ripple {
  from { width: 0; height: 0; opacity: .6; }
  to { width: 220px; height: 220px; opacity: 0; }
}
.note { color: var(--md-on-surface-variant); font-size: 12px; }
details.docs { margin-top: 12px; border: 1px dashed var(--md-outline); border-radius: 8px; padding: 8px 12px; }
.site-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--md-surface-variant);
  color: var(--md-on-surface-variant);
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--md-surface-variant); }
  #content { padding: 16px; }
  .tool-grid { grid-template-columns: 1fr; }
}