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

html, body {
  height: 100%;
  width: 100%;
  background-color: var(--surface-0);
  color: var(--text-high);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* Typography and Data Stability */
.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.text-mono {
  font-family: var(--font-mono);
}

/* Focus Indicator (UNIFIED V2.0 Standard) */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 1px var(--focal-core), 0 0 8px var(--focal-glow) !important;
}

/* Scrollbar Engineering */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--surface-3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--surface-4);
}

/* Buttons (Strict 32px / 40px contract) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 16px;
  border: none;
  border-radius: var(--radius-base);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, opacity 0.15s ease, box-shadow 0.15s ease;
  user-select: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Exactly 1 Primary Button per action zone */
.btn-primary {
  background-color: var(--focal-core);
  color: #0c0f14;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--focal-hover);
  box-shadow: 0 0 12px var(--focal-glow);
}

.btn-secondary {
  background-color: var(--surface-3);
  color: var(--text-high);
  box-shadow: var(--edge-highlight);
}
.btn-secondary:hover:not(:disabled) {
  background-color: var(--surface-4);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-med);
}
.btn-ghost:hover:not(:disabled) {
  background-color: var(--surface-3);
  color: var(--text-high);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-base);
}

/* Inputs & Form Controls */
.input-field {
  width: 100%;
  height: 36px;
  padding: 0 12px;
  background-color: var(--surface-0);
  color: var(--text-high);
  border: 1px solid var(--surface-3);
  border-radius: var(--radius-base);
  font-family: inherit;
  font-size: 13px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.4);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.input-field:focus {
  border-color: var(--focal-core);
  box-shadow: 0 0 0 1px var(--focal-core), 0 0 8px var(--focal-glow);
}

.textarea-field {
  width: 100%;
  padding: 12px;
  background-color: var(--surface-0);
  color: var(--text-high);
  border: 1px solid var(--surface-3);
  border-radius: var(--radius-base);
  font-family: inherit;
  font-size: 13px;
  line-height: 1.5;
  resize: none;
  min-height: 48px;
  max-height: 180px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.4);
}
.textarea-field:focus {
  border-color: var(--focal-core);
  box-shadow: 0 0 0 1px var(--focal-core), 0 0 8px var(--focal-glow);
}

/* Scoped Markdown Engine (.doc-body) */
.doc-body {
  line-height: 1.65;
  color: var(--text-high);
  word-break: break-word;
}
.doc-body h1, .doc-body h2, .doc-body h3, .doc-body h4 {
  color: var(--text-high);
  font-weight: 600;
  line-height: 1.3;
}
.doc-body h1 {
  font-size: 20px;
  margin-top: 24px;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--surface-3);
}
.doc-body h2 {
  font-size: 17px;
  margin-top: 20px;
  margin-bottom: 10px;
}
.doc-body h3 {
  font-size: 15px;
  margin-top: 16px;
  margin-bottom: 8px;
}
.doc-body p {
  margin-bottom: 12px;
}
.doc-body p:last-child {
  margin-bottom: 0;
}
.doc-body pre {
  margin: 12px 0;
  padding: 16px;
  background-color: var(--surface-1);
  border-radius: var(--radius-base);
  box-shadow: var(--edge-highlight);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  border: 1px solid hsla(var(--base-h), 20%, 100%, 0.04);
}
.doc-body code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 2px 6px;
  background-color: var(--surface-1);
  border-radius: 4px;
  color: hsl(var(--accent-h), var(--accent-s), 70%);
}
.doc-body pre code {
  padding: 0;
  background: transparent;
  color: var(--text-high);
}
.doc-body ul, .doc-body ol {
  margin-bottom: 12px;
  padding-left: 24px;
}
.doc-body li {
  margin-bottom: 4px;
}
.doc-body blockquote {
  margin: 12px 0;
  padding: 8px 16px;
  border-left: 3px solid var(--surface-3);
  background-color: hsla(var(--base-h), var(--base-s), 10%, 0.4);
  border-radius: 0 var(--radius-base) var(--radius-base) 0;
  color: var(--text-med);
  font-style: italic;
}
.doc-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}
.doc-body th, .doc-body td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--surface-3);
}
.doc-body th {
  background-color: var(--surface-1);
  color: var(--text-med);
  font-weight: 600;
}
.doc-body tr:hover td {
  background-color: var(--surface-1);
}
.doc-body a {
  color: var(--focal-core);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.doc-body hr {
  border: none;
  border-top: 1px solid var(--surface-3);
  margin: 20px 0;
}