:root {
  color-scheme: light dark;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background-color: var(--bg);
  color: var(--fg);
}

html[data-theme="light"] {
  --bg: #f5f7fb;
  --fg: #1d1f27;
  --surface: #ffffff;
  --surface-alt: #eef1f8;
  --border: #d2d7e5;
  --accent: #2459f4;
  --accent-contrast: #ffffff;
  --accent-muted: rgba(36, 89, 244, 0.12);
  --shadow: 0 12px 32px rgba(31, 41, 51, 0.08);
  --error: #d02632;
  --success: #1f8a51;
}

html[data-theme="dark"] {
  --bg: #0f121b;
  --fg: #f4f6ff;
  --surface: #181c2a;
  --surface-alt: #202534;
  --border: #2d3347;
  --accent: #6c8dff;
  --accent-contrast: #01030a;
  --accent-muted: rgba(108, 141, 255, 0.15);
  --shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  --error: #ff5f6d;
  --success: #3ccf8e;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header,
.app-footer {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem clamp(1rem, 4vw, 3rem);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.app-footer {
  border-top: 1px solid var(--border);
  border-bottom: none;
  box-shadow: none;
  font-size: 0.9rem;
  color: rgba(125, 135, 154, 0.9);
}

.github-attribution {
  margin-left: auto;
}

.github-attribution a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: 0.5rem;
  transition: background-color 0.2s ease, transform 0.2s ease;
  font-size: 0.85rem;
  font-weight: 500;
}

.github-attribution a:hover {
  background-color: var(--surface-alt);
  transform: translateY(-1px);
}

.github-attribution a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.github-attribution svg {
  flex-shrink: 0;
  opacity: 0.8;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.brand .tagline {
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  color: rgba(128, 139, 160, 0.9);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.app-button {
  border: none;
  background: var(--accent);
  color: var(--accent-contrast);
  padding: 0.6rem 1.2rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease, filter 0.2s ease;
}

.app-button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.app-button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.app-button.secondary {
  background: var(--surface);
  color: inherit;
  border: 1px solid var(--border);
}

.app-button.ghost {
  background: transparent;
  color: inherit;
  border: 1px solid var(--border);
}

.app-button.small {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

.app-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  filter: none !important;
  background: var(--surface-alt) !important;
  color: var(--fg);
  border-color: var(--border) !important;
}

.app-button:disabled:hover {
  transform: none;
  filter: none;
}

#theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  background: var(--surface-alt);
  color: inherit;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

#theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#theme-toggle:hover {
  background: var(--accent-muted);
  transform: translateY(-1px);
}

.toggle-icon {
  font-size: 1.1rem;
}

.shortcut-hint {
  font-size: 0.85rem;
  color: rgba(128, 139, 160, 0.85);
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 0;
  min-height: 0;
  background: var(--surface-alt);
}

.tool-list {
  border-right: 1px solid var(--border);
  padding: 1.5rem clamp(0.75rem, 2vw, 1.5rem);
  background: var(--surface);
}

.tool-list h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.tool-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.tool-buttons button {
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.75rem;
  background: var(--surface-alt);
  color: inherit;
  text-align: left;
  font-size: 0.95rem;
  cursor: pointer;
  transition: border 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.tool-buttons button[aria-selected="true"] {
  border-color: var(--accent);
  background: var(--accent-muted);
}

.tool-buttons button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.panes {
  display: flex;
  flex: 1;
}

.pane {
  padding: clamp(0.75rem, 2vw, 1.5rem);
  overflow-y: auto;
  background: var(--surface);
}

.pane:first-child {
  flex: 2.5; /* Make form pane bigger */
}

.pane-right {
  flex: 1; /* Make output pane smaller */
  border-left: 1px solid var(--border);
  background: var(--surface-alt);
}

.tool-panel h2 {
  margin-top: 0;
}

.output-wrapper h2 {
  margin: 0 0 1rem 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.output-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

textarea,
input[type="url"],
input[type="text"],
input[type="number"] {
  width: 100%;
  box-sizing: border-box;
  padding: 0.75rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: inherit;
  font-size: 0.95rem;
  font-family: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

textarea {
  resize: vertical;
  min-height: 110px;
}

input[type="url"],
input[type="text"],
input[type="number"] {
  min-height: 44px;
  font-family: inherit;
}

select {
  width: 100%;
  min-height: 44px;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: inherit;
  font-size: 0.95rem;
  padding: 0.4rem 0.6rem;
}

textarea:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0;
}

.schema-actions {
  justify-content: flex-start;
  align-items: center;
}

.error-message {
  color: var(--error);
  min-height: 1.25rem;
  font-size: 0.9rem;
}

.status-message {
  font-size: 0.9rem;
  min-height: 1.25rem;
}

.status-message.loading {
  color: rgba(128, 139, 160, 0.9);
}

.status-message.success {
  color: var(--success);
}

.status-message.error {
  color: var(--error);
}

.helper-text {
  font-size: 0.85rem;
  color: rgba(128, 139, 160, 0.85);
  margin: 0.25rem 0 0;
  line-height: 1.4;
}

.helper-text.error {
  color: var(--error);
  font-weight: 500;
}

.code-block {
  background: var(--surface);
  border-radius: 0.8rem;
  padding: 1rem 1.25rem;
  min-height: 240px;
  border: 1px solid var(--border);
  overflow-x: auto;
  white-space: pre;
}

.token.key {
  color: #cb741a;
}

.token.string {
  color: #2f8df5;
}

.token.number {
  color: #b86bf5;
}

.token.boolean {
  color: #f16b6b;
}

.token.null {
  color: #6cc4a1;
}

.hidden {
  display: none !important;
}

.invalid-input {
  border-color: var(--error);
  box-shadow: 0 0 0 1px var(--error);
}

#schema-config {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

#schema-config.collapsed {
  display: none;
}

#schema-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.5rem;
}

.schema-fieldset {
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 0.75rem;
  background: var(--surface-alt);
  margin-bottom: 0.75rem;
}

.schema-fieldset legend {
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 0.5rem;
  color: var(--accent);
}

.schema-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}

.schema-field label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg);
  margin-bottom: 0.25rem;
}

.schema-field input,
.schema-field select,
.schema-field textarea {
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
  color: var(--fg);
  font-size: 0.9rem;
  transition: border-color 0.2s ease;
}

.schema-field input:focus,
.schema-field select:focus,
.schema-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-muted);
}

.schema-oneof {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.schema-oneof-select {
  max-width: 260px;
}

.schema-oneof-options {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.schema-allof {
  padding: 0.75rem;
  border-radius: 0.6rem;
  border: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 0.75rem;
}

.schema-allof .helper-text {
  margin-bottom: 0.75rem;
  font-style: italic;
  color: var(--accent);
}

.array-items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.array-item {
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
}

.array-item > :first-child {
  flex: 1;
}

.array-item-controls {
  display: flex;
  gap: 0.4rem;
  align-items: flex-start;
  padding-top: 0.15rem;
}

.schema-field.schema-array {
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  background: var(--surface-alt);
  margin-bottom: 0.75rem;
}

.schema-field.schema-array > .app-button {
  margin-top: 0.5rem;
  align-self: flex-start;
}

.const-input {
  background: var(--surface);
  opacity: 0.9;
  cursor: not-allowed;
}

.validation-panel {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 0.8rem;
  border: 1px solid var(--border);
  background: var(--surface);
  min-height: 80px;
  font-size: 0.95rem;
}

.validation-panel ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
}

.validation-panel li {
  margin-bottom: 0.35rem;
}

.validation-panel.has-errors {
  border-color: var(--error);
  color: var(--error);
}

@media (max-width: 768px) {
  .app-main {
    grid-template-columns: 1fr;
  }
  .tool-list {
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-direction: row;
  }
  .panes {
    flex-direction: column;
  }
  .pane:first-child {
    flex: 1; /* Reset flex on mobile */
  }
  .pane-right {
    flex: 1; /* Reset flex on mobile */
    border-left: none;
    border-top: 1px solid var(--border);
  }
  textarea {
    min-height: 100px;
  }
  
  .app-footer {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }
}

/* Pattern Properties Styling */
.schema-pattern-properties {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  background: var(--surface-alt);
  margin-top: 0.5rem;
}

.pattern-properties-title {
  margin: 0 0 0.5rem 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}

.pattern-properties-entries {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.pattern-property-entry {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  gap: 1rem;
  align-items: start;
  padding: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
}

.pattern-property-name {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.pattern-property-name label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.25rem;
  font-size: 0.875rem;
}

.pattern-property-name input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  background: var(--surface);
  color: var(--fg);
  font-size: 0.875rem;
}

.pattern-property-name input.valid {
  border-color: var(--success);
  background: rgba(31, 138, 81, 0.1);
}

.pattern-property-name input.invalid {
  border-color: var(--error);
  background: rgba(208, 38, 50, 0.1);
}

/* Pattern Validation Styling */
input.pattern-valid {
  border-color: var(--success);
  background: rgba(31, 138, 81, 0.05);
}

input.pattern-invalid {
  border-color: var(--error);
  background: rgba(208, 38, 50, 0.05);
}

input.pattern-valid:focus {
  outline-color: var(--success);
  box-shadow: 0 0 0 2px rgba(31, 138, 81, 0.2);
}

input.pattern-invalid:focus {
  outline-color: var(--error);
  box-shadow: 0 0 0 2px rgba(208, 38, 50, 0.2);
}

.pattern-property-value {
  display: flex;
  flex-direction: column;
}

.pattern-property-controls {
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 768px) {
  .pattern-property-entry {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  .pattern-property-controls {
    align-self: center;
  }
  
  .pattern-words-wrapper {
    max-height: 80px;
  }
  
  .pattern-word-btn {
    font-size: 0.75rem;
    padding: 0.2rem 0.4rem;
  }
}

/* Pattern Input Wrapper Styling */
.pattern-input-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  width: 100%;
}

.pattern-suggestions-btn {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.35rem 0.5rem;
  font-size: 0.875rem;
  min-width: auto;
  border-radius: 0 0.25rem 0.25rem 0;
}

.pattern-suggestions-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  box-shadow: var(--shadow);
  max-height: 300px;
  overflow-y: auto;
  margin-top: 0.25rem;
}

.pattern-suggestions-dropdown.hidden {
  display: none;
}

.pattern-suggestion-item {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.pattern-suggestion-item:last-child {
  border-bottom: none;
}

.pattern-suggestion-item:hover {
  background: var(--surface-alt);
}

.pattern-code {
  display: block;
  font-family: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.875rem;
  color: var(--accent);
  background: var(--accent-muted);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  margin-bottom: 0.25rem;
  word-break: break-all;
}

.pattern-description {
  display: block;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--fg);
}

.pattern-examples {
  display: block;
  color: var(--fg);
  opacity: 0.7;
  font-size: 0.8rem;
}

/* OneOf Schema Styling */
.schema-oneof {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  background: var(--surface-alt);
  margin-top: 0.5rem;
}

.schema-oneof-base {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.schema-oneof-selector-wrapper {
  margin-bottom: 1rem;
}

.schema-oneof-label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--fg);
}

.schema-oneof-select {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  background: var(--surface);
  color: var(--fg);
  font-size: 0.875rem;
}

.schema-oneof-options {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.schema-oneof-options:empty {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}
.pattern-word-options {
  margin-top: 0.5rem;
  padding: 0.5rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
}

.pattern-words-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--fg);
  opacity: 0.8;
}

.pattern-words-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  max-height: 120px;
  overflow-y: auto;
}

.pattern-word-btn {
  padding: 0.25rem 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.25rem;
  color: var(--fg);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.pattern-word-btn:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.pattern-word-btn:active {
  transform: scale(0.95);
}

@media (max-width: 768px) {
  .github-attribution {
    margin-left: 0;
  }
  
  .output-wrapper h2 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
  }
  
  .output-actions {
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
  }
}