/*
 * Copyright (c) 2026 F. Lotfi All rights reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file.
 */

/*
 * WarfLang Playground Stylesheet
 * 100% Zero-Dependency Modern Vanilla CSS3
 * Inspired by Slang Playground & Modern Compiler Explorers
 */

:root {
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-size-code: 13px;
  --line-height-code: 20px;
}

/* Dark Theme (Default: Catppuccin Mocha inspired) */
:root,
[data-theme="dark"] {
  --bg-app: #181825;
  --bg-primary: #1e1e2e;
  --bg-secondary: #252538;
  --bg-surface: #313244;
  --bg-surface-hover: #45475a;
  --bg-gutter: #181825;
  --border-color: #313244;
  --border-subtle: #252538;
  
  --text-primary: #cdd6f4;
  --text-secondary: #a6adc8;
  --text-muted: #6c7086;
  --text-inverse: #11111b;
  
  --accent: #89b4fa;
  --accent-hover: #b4befe;
  --accent-subtle: rgba(137, 180, 250, 0.15);
  --accent-border: #89b4fa;
  
  --caret-color: #f5e0dc;
  --selection-bg: rgba(137, 180, 250, 0.35);
  --active-line-bg: rgba(255, 255, 255, 0.04);
  --cross-highlight-bg: rgba(137, 180, 250, 0.22);
  --cross-highlight-border: #89b4fa;
  
  --error: #f38ba8;
  --error-bg: rgba(243, 139, 168, 0.15);
  --warning: #f9e2af;
  --warning-bg: rgba(249, 226, 175, 0.15);
  --success: #a6e3a1;
  --success-bg: rgba(166, 227, 161, 0.15);
  --info: #89dceb;

  /* Syntax Highlighting */
  --syn-keyword: #cba6f7;
  --syn-function: #89b4fa;
  --syn-type: #f9e2af;
  --syn-string: #a6e3a1;
  --syn-number: #fab387;
  --syn-comment: #6c7086;
  --syn-operator: #89dceb;
  --syn-variable: #cdd6f4;
  --syn-punctuation: #9399b2;
  --syn-boolean: #fab387;
}

/* Light Theme (Catppuccin Latte inspired) */
[data-theme="light"] {
  --bg-app: #dce0e8;
  --bg-primary: #eff1f5;
  --bg-secondary: #e6e9ef;
  --bg-surface: #ccd0da;
  --bg-surface-hover: #bcc0cc;
  --bg-gutter: #e6e9ef;
  --border-color: #ccd0da;
  --border-subtle: #dce0e8;
  
  --text-primary: #4c4f69;
  --text-secondary: #6c6f85;
  --text-muted: #8c8fa1;
  --text-inverse: #ffffff;
  
  --accent: #1e66f5;
  --accent-hover: #04a5e5;
  --accent-subtle: rgba(30, 102, 245, 0.12);
  --accent-border: #1e66f5;
  
  --caret-color: #1e66f5;
  --selection-bg: rgba(30, 102, 245, 0.25);
  --active-line-bg: rgba(0, 0, 0, 0.04);
  --cross-highlight-bg: rgba(30, 102, 245, 0.18);
  --cross-highlight-border: #1e66f5;
  
  --error: #d20f39;
  --error-bg: rgba(210, 15, 57, 0.12);
  --warning: #df8e1d;
  --warning-bg: rgba(223, 142, 29, 0.12);
  --success: #40a02b;
  --success-bg: rgba(64, 160, 43, 0.12);
  --info: #04a5e5;

  /* Syntax Highlighting */
  --syn-keyword: #8839ef;
  --syn-function: #1e66f5;
  --syn-type: #df8e1d;
  --syn-string: #40a02b;
  --syn-number: #fe640b;
  --syn-comment: #9ca0b0;
  --syn-operator: #04a5e5;
  --syn-variable: #4c4f69;
  --syn-punctuation: #7c7f93;
  --syn-boolean: #fe640b;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

/* App Shell Layout */
#app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Top Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  min-height: 48px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 12px;
  gap: 12px;
  user-select: none;
  z-index: 10;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.3px;
  color: var(--text-primary);
  text-decoration: none;
  padding-right: 8px;
  border-right: 1px solid var(--border-color);
}

.brand-badge {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--accent-subtle);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--accent);
}

/* Form Controls & Buttons */
.form-select {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font-sans);
  height: 30px;
  padding: 0 8px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.form-select:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-muted);
}

.form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 30px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
  white-space: nowrap;
}

.btn:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-muted);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
  font-weight: 600;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-icon {
  width: 30px;
  padding: 0;
}

.btn-toggle {
  font-size: 11px;
  padding: 0 8px;
  height: 26px;
  border-radius: 13px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
}

.btn-toggle.active {
  background-color: var(--accent-subtle);
  color: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

.btn-xs {
  height: 22px;
  padding: 0 6px;
  font-size: 11px;
}

.btn-close {
  width: 20px;
  height: 20px;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-close:hover {
  background-color: var(--bg-surface-hover);
  color: var(--text-primary);
}

kbd {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 2px 4px;
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Switch Checkbox */
.switch-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text-secondary);
  user-select: none;
}

.switch-label input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
  width: 14px;
  height: 14px;
}

/* Main Workspace */
.workspace {
  display: flex;
  flex-direction: column;
  flex: 1;
  height: calc(100vh - 48px);
  overflow: hidden;
  position: relative;
}

/* Horizontal Panes Container */
.panes-container {
  display: flex;
  flex-direction: row;
  flex: 1;
  min-height: 120px;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-primary);
}

/* Individual Column / Pane */
.pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 180px;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-primary);
  position: relative;
}

.pane.hidden {
  display: none !important;
}

.pane-editor {
  flex: 1.5;
  min-width: 280px;
}

.pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 32px;
  min-height: 32px;
  padding: 0 10px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  user-select: none;
}

.pane-header-title {
  display: flex;
  align-items: center;
  gap: 6px;
}

.pane-header-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
}

/* Splitters */
.splitter-h {
  width: 5px;
  background-color: var(--border-color);
  cursor: col-resize;
  transition: background-color 0.15s ease;
  user-select: none;
  z-index: 5;
  flex-shrink: 0;
}

.splitter-h:hover, .splitter-h.dragging {
  background-color: var(--accent);
}

.splitter-v {
  height: 5px;
  background-color: var(--border-color);
  cursor: row-resize;
  transition: background-color 0.15s ease;
  user-select: none;
  z-index: 5;
  flex-shrink: 0;
}

.splitter-v:hover, .splitter-v.dragging {
  background-color: var(--accent);
}

/* Source Editor Area */
.editor-body {
  display: flex;
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-primary);
}

.editor-gutter {
  width: 44px;
  min-width: 44px;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-gutter);
  border-right: 1px solid var(--border-color);
  padding: 8px 0;
  user-select: none;
  font-family: var(--font-mono);
  font-size: var(--font-size-code);
  line-height: var(--line-height-code);
  color: var(--text-muted);
  text-align: right;
  box-sizing: border-box;
}

.gutter-line {
  height: var(--line-height-code);
  padding-right: 8px;
  padding-left: 4px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.gutter-line.active {
  color: var(--text-primary);
  font-weight: 600;
}

.gutter-line.has-error::before {
  content: "●";
  color: var(--error);
  font-size: 9px;
  position: absolute;
  left: 4px;
}

.editor-viewport {
  position: relative;
  flex: 1;
  height: 100%;
  overflow: hidden;
}

/* Active Line Highlight Band */
.active-line-band {
  position: absolute;
  left: 0;
  right: 0;
  height: var(--line-height-code);
  background-color: var(--active-line-bg);
  pointer-events: none;
  z-index: 1;
  display: none;
}

/* Textarea & Backdrop Synchronized Overlay */
.editor-backdrop,
#codeEditor {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 8px 12px;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: var(--font-size-code);
  line-height: var(--line-height-code);
  tab-size: 2;
  white-space: pre;
  word-wrap: normal;
  overflow-wrap: normal;
  box-sizing: border-box;
}

.editor-backdrop {
  z-index: 2;
  color: var(--text-primary);
  background: transparent;
  pointer-events: none;
  overflow: hidden;
}

.editor-backdrop code {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

#codeEditor {
  z-index: 3;
  color: transparent;
  background: transparent;
  caret-color: var(--caret-color);
  resize: none;
  overflow: auto;
}

#codeEditor::selection {
  background: var(--selection-bg);
}

/* Syntax Highlighting Classes */
.tok-keyword     { color: var(--syn-keyword); font-weight: 600; }
.tok-function    { color: var(--syn-function); }
.tok-type        { color: var(--syn-type); }
.tok-string      { color: var(--syn-string); }
.tok-number      { color: var(--syn-number); }
.tok-comment     { color: var(--syn-comment); font-style: italic; }
.tok-operator    { color: var(--syn-operator); }
.tok-variable    { color: var(--syn-variable); }
.tok-punctuation { color: var(--syn-punctuation); }
.tok-boolean     { color: var(--syn-boolean); }

/* Squiggle Error Lines */
.squiggle {
  text-decoration: underline wavy var(--error);
  text-decoration-skip-ink: none;
  background-color: var(--error-bg);
  border-radius: 2px;
}

/* Godbolt Cross-Highlighting */
.cross-highlight {
  background-color: var(--cross-highlight-bg) !important;
  outline: 1px solid var(--cross-highlight-border);
  border-radius: 2px;
  transition: background-color 0.1s ease;
}

/* Code Views (AST & IR Columns) */
.code-view {
  flex: 1;
  height: calc(100% - 32px);
  overflow: auto;
  padding: 8px 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-code);
  line-height: var(--line-height-code);
  background-color: var(--bg-primary);
}

.code-view-line {
  padding: 0 12px;
  white-space: pre;
  display: flex;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.1s ease;
}

.code-view-line:hover {
  background-color: var(--bg-surface-hover);
}

.code-view-line .line-num {
  width: 32px;
  min-width: 32px;
  color: var(--text-muted);
  user-select: none;
  text-align: right;
  margin-right: 12px;
  font-size: 11px;
}

.code-view-line .line-text {
  flex: 1;
}

/* AST Hierarchy Node */
.ast-node {
  padding: 1px 12px;
  white-space: pre;
  cursor: pointer;
  display: flex;
  align-items: center;
  font-size: 12px;
  transition: background-color 0.1s ease;
}

.ast-node:hover {
  background-color: var(--bg-surface-hover);
}

.ast-kind {
  font-weight: 600;
  color: var(--accent);
  margin-right: 8px;
}

.ast-span {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: auto;
}

.ast-text {
  color: var(--text-secondary);
}

/* Bottom Console Pane */
.console-pane {
  display: flex;
  flex-direction: column;
  height: 180px;
  min-height: 36px;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.console-pane.collapsed {
  height: 36px !important;
}

.console-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  min-height: 36px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 10px;
  user-select: none;
}

.console-tabs {
  display: flex;
  gap: 4px;
}

.console-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 500;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.console-tab:hover {
  color: var(--text-primary);
}

.console-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 10px;
  background-color: var(--bg-surface);
  color: var(--text-secondary);
}

.badge.has-errors {
  background-color: var(--error);
  color: var(--text-inverse);
}

.console-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.console-body {
  flex: 1;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-primary);
}

.tab-pane {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  padding: 10px 14px;
  display: none;
}

.tab-pane.active {
  display: block;
}

#consoleStdout {
  font-family: var(--font-mono);
  font-size: var(--font-size-code);
  line-height: var(--line-height-code);
  color: var(--text-primary);
  white-space: pre-wrap;
  margin-bottom: 8px;
}

.console-return-card {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 6px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 12px;
  margin-top: 6px;
}

.console-return-card.success {
  border-color: var(--success);
  background-color: var(--success-bg);
  color: var(--success);
}

.console-return-card.error {
  border-color: var(--error);
  background-color: var(--error-bg);
  color: var(--error);
}

/* Diagnostics List */
.diagnostics-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.diagnostic-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 6px;
  background-color: var(--bg-secondary);
  border-left: 3px solid var(--error);
  cursor: pointer;
  transition: background-color 0.15s ease;
  font-size: 12px;
}

.diagnostic-item:hover {
  background-color: var(--bg-surface);
}

.diagnostic-icon {
  color: var(--error);
  font-weight: bold;
}

.diagnostic-pos {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 11px;
}

.diagnostic-msg {
  color: var(--text-primary);
}

/* Hover Tooltips */
.editor-tooltip {
  position: fixed;
  z-index: 100;
  max-width: 360px;
  padding: 6px 10px;
  border-radius: 6px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  font-size: 12px;
  line-height: 1.4;
  color: var(--text-primary);
  pointer-events: none;
  transition: opacity 0.1s ease;
}

.editor-tooltip.hidden {
  display: none;
  opacity: 0;
}

.tooltip-code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background-color: var(--bg-surface);
  padding: 2px 4px;
  border-radius: 3px;
}

.tooltip-error {
  color: var(--error);
}

/* Autocomplete Popup */
.autocomplete-popup {
  position: fixed;
  z-index: 100;
  width: 240px;
  max-height: 180px;
  overflow-y: auto;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  font-family: var(--font-mono);
  font-size: 12px;
  user-select: none;
}

.autocomplete-popup.hidden {
  display: none;
}

.autocomplete-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 8px;
  cursor: pointer;
  color: var(--text-primary);
}

.autocomplete-item:hover, .autocomplete-item.selected {
  background-color: var(--accent-subtle);
  color: var(--accent);
}

.autocomplete-badge {
  font-size: 9px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
  text-transform: uppercase;
}

.badge-keyword { background: rgba(203, 166, 247, 0.2); color: var(--syn-keyword); }
.badge-function { background: rgba(137, 180, 250, 0.2); color: var(--syn-function); }
.badge-variable { background: rgba(249, 226, 175, 0.2); color: var(--syn-type); }
.badge-type { background: rgba(166, 227, 161, 0.2); color: var(--syn-string); }

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  font-size: 12px;
  font-weight: 500;
  z-index: 1000;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

.toast.hidden {
  opacity: 0;
  transform: translateY(12px);
}