/* =========================================================================
   BENTO DEV — Developer Hub Stylesheet
   Matches BENTO IDE design system (purple primary, white surfaces)
   ========================================================================= */

/* --- Design Tokens ------------------------------------------------------ */
:root {
  --tesa-primary: #7239ea;
  --tesa-primary-hover: #5f2bc7;
  --tesa-primary-light: #e3d6ff;
  --tesa-primary-subtle: #f5f0ff;
  --tesa-blue: #3c54a4;
  --tesa-red: #e9292a;
  --tesa-navy: #231f20;

  --color-success: #50cd89;
  --color-success-hover: #43b578;
  --color-info: #009ef7;
  --color-info-hover: #0085d1;
  --color-warning: #ffc700;
  --color-danger: #f1416c;
  --color-danger-hover: #d9365d;

  --bg-body: #f5f8fa;
  --bg-surface: #ffffff;
  --bg-elevated: #ffffff;
  --bg-muted: #f1f3f5;
  --bg-code: #1e1e2d;
  --bg-terminal: #1a1a2e;

  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-inverse: #f9fafb;
  --text-code: #d4d4d4;

  --border-color: #e5e7eb;
  --border-hover: #d1d5db;
  --border-focus: var(--tesa-primary);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

  --header-height: 54px;
  --toolbar-height: 40px;
  --statusbar-height: 26px;

  --border-radius: 8px;
  --border-radius-sm: 6px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', 'Consolas', monospace;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: 14px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-body);
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--tesa-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

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

/* --- Splash Screen ------------------------------------------------------ */
#splash {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #fff;
  transition: opacity 0.5s ease-out;
}
#splash.fade-out { opacity: 0; pointer-events: none; }

#splash .logo-text {
  font-size: 2.4rem; font-weight: 800; letter-spacing: 2px;
  background: linear-gradient(90deg, var(--tesa-primary), var(--color-info));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
#splash .subtitle { font-size: 0.9rem; color: var(--text-tertiary); margin-top: 8px; letter-spacing: 1px; }
#splash .spinner {
  margin-top: 32px; width: 32px; height: 32px;
  border: 3px solid rgba(255,255,255,0.15);
  border-top-color: var(--tesa-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ========================================================================= */
/* HEADER                                                                    */
/* ========================================================================= */
#header {
  height: var(--header-height);
  background: linear-gradient(135deg, #4a0e0e 0%, #6b1a1a 40%, #7c2020 100%);
  border-bottom: 1px solid rgba(139, 45, 45, 0.5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(74, 14, 14, 0.3);
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.95);
}

.header-left,
.header-center,
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Logo */
.logo { display: flex; align-items: center; gap: 8px; }

.logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-circles {
  color: #f4a6a6;
  font-weight: 700;
}

.logo-subtitle {
  font-size: 0.72rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
}

/* View Toggle */
.view-toggle {
  display: flex;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-sm);
  padding: 2px;
  gap: 2px;
}

.view-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.view-btn:hover {
  color: #fff;
}

.view-btn.active {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.view-btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* Board Selector (Header) */
.board-selector {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  padding: 5px 10px;
  font-size: 12px;
  font-family: var(--font-sans);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}
.board-selector:focus {
  border-color: var(--tesa-primary);
  box-shadow: 0 0 0 3px rgba(114, 57, 234, 0.1);
}

/* Header Badge */
.header-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 3px 10px;
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  white-space: nowrap;
}

/* ========================================================================= */
/* TOOLBAR                                                                   */
/* ========================================================================= */
#toolbar {
  height: var(--toolbar-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  gap: 8px;
  flex-shrink: 0;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.toolbar-divider {
  width: 1px;
  height: 20px;
  background: var(--border-color);
}

/* ========================================================================= */
/* BUTTONS                                                                   */
/* ========================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  user-select: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:hover { filter: brightness(0.95); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }
.btn:focus-visible { outline: 2px solid var(--border-focus); outline-offset: 2px; }

.btn svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.btn-primary {
  background: var(--tesa-primary);
  color: white;
  box-shadow: 0 1px 2px rgba(114, 57, 234, 0.3);
}
.btn-primary:hover { background: var(--tesa-primary-hover); }

.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: 0 1px 2px rgba(80, 205, 137, 0.3);
}
.btn-success:hover { background: var(--color-success-hover); }

.btn-danger {
  background: var(--color-danger);
  color: white;
}
.btn-danger:hover { background: var(--color-danger-hover); }

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}

.btn-xs {
  padding: 3px 8px;
  font-size: 11px;
}

/* ========================================================================= */
/* MAIN LAYOUT                                                               */
/* ========================================================================= */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* --- Panels ------------------------------------------------------------- */
.panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-surface);
  min-height: 0;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.panel-title svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.panel-badge {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-tertiary);
}

/* --- Editor Panel (Left) ------------------------------------------------ */
#editorPanel {
  flex: 1;
  min-width: 200px;
}

/* Editor body: flex row containing file tree + Monaco */
.editor-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

/* File Tree Sidebar */
.file-tree {
  width: 200px;
  min-width: 140px;
  max-width: 320px;
  background: var(--bg-code);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
}

.file-tree-header {
  padding: 8px 12px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.file-tree-list {
  list-style: none;
  margin: 0;
  padding: 4px 0;
  overflow-y: auto;
  flex: 1;
}

.file-tree-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-code);
  cursor: pointer;
  transition: background 0.15s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-tree-list li:hover {
  background: rgba(255, 255, 255, 0.06);
}

.file-tree-list li.active {
  background: rgba(114, 57, 234, 0.25);
  color: #fff;
}

.file-tree-list li .file-icon {
  flex-shrink: 0;
  font-size: 13px;
  opacity: 0.7;
}

/* Nested file tree (GitHub-live) */
.file-tree-group {
  list-style: none;
  padding: 0;
  margin: 0;
}

.file-tree-children {
  list-style: none;
  padding: 0;
  margin: 0;
}

.file-tree-children.collapsed {
  display: none;
}

.file-tree-dir {
  cursor: pointer;
  color: rgba(255, 255, 255, 0.7);
  user-select: none;
  font-size: 11px;
  padding: 3px 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-tree-dir:hover {
  background: rgba(255, 255, 255, 0.06);
}

.dir-arrow {
  display: inline-block;
  width: 14px;
  font-size: 8px;
  text-align: center;
  transition: transform 0.15s ease;
}

/* File tree ↔ Monaco resize handle */
.file-tree-resize {
  width: 4px;
  background: transparent;
  cursor: col-resize;
  flex-shrink: 0;
  transition: background 0.2s ease;
}

.file-tree-resize:hover,
.file-tree-resize.active {
  background: var(--tesa-primary);
}

/* Editor Main — wraps tab bar + Monaco + Markdown preview */
.editor-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* --- Editor Tabs --------------------------------------------------------- */
.editor-tabs {
  display: flex;
  align-items: stretch;
  background: #161622;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 0;
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
  scrollbar-width: none;
}
.editor-tabs::-webkit-scrollbar { display: none; }
.editor-tabs:empty { display: none; }

.editor-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  height: 32px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-tertiary);
  cursor: pointer;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  user-select: none;
  transition: background 0.15s ease, color 0.15s ease;
  position: relative;
  flex-shrink: 0;
}
.editor-tab:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
}
.editor-tab.active {
  background: var(--bg-code);
  color: #fff;
}
.editor-tab.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--tesa-primary);
}
.editor-tab .tab-icon {
  font-size: 13px;
  flex-shrink: 0;
  opacity: 0.7;
}
.editor-tab .tab-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  font-size: 14px;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
  flex-shrink: 0;
}
.editor-tab:hover .tab-close,
.editor-tab.active .tab-close {
  opacity: 0.6;
}
.editor-tab .tab-close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.12);
}

/* --- Markdown Preview ---------------------------------------------------- */
.markdown-preview {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-code);
  padding: 24px 32px;
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.7;
  color: #e2e8f0; /* light text for dark bg — do NOT use --text-primary (it's near-black) */
}
.markdown-preview.hidden {
  display: none;
}

.markdown-preview h1 { font-size: 1.8em; margin: 0.6em 0 0.4em; font-weight: 700; color: #f1f5f9; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 0.3em; }
.markdown-preview h2 { font-size: 1.4em; margin: 1em 0 0.4em; font-weight: 600; color: #f1f5f9; border-bottom: 1px solid rgba(255,255,255,0.06); padding-bottom: 0.2em; }
.markdown-preview h3 { font-size: 1.15em; margin: 0.8em 0 0.3em; font-weight: 600; color: #e2e8f0; }
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 { font-size: 1em; margin: 0.6em 0 0.2em; font-weight: 600; color: #cbd5e1; }

.markdown-preview p { margin: 0.5em 0; }
.markdown-preview a { color: #a78bfa; text-decoration: none; }
.markdown-preview a:hover { text-decoration: underline; color: #c4b5fd; }
.markdown-preview img { max-width: 100%; border-radius: 6px; margin: 8px 0; }
.markdown-preview strong { color: #f8fafc; }
.markdown-preview em { color: #cbd5e1; }

.markdown-preview code {
  background: rgba(255,255,255,0.1);
  color: #f0abfc;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}
.markdown-preview pre {
  background: #13131f;
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 0.8em 0;
  border: 1px solid rgba(255,255,255,0.08);
}
.markdown-preview pre code {
  background: none;
  color: #d4d4d4;
  padding: 0;
  font-size: 12px;
  line-height: 1.5;
}

.markdown-preview ul,
.markdown-preview ol { padding-left: 1.5em; margin: 0.4em 0; }
.markdown-preview li { margin: 0.2em 0; }
.markdown-preview li::marker { color: #94a3b8; }

.markdown-preview blockquote {
  border-left: 3px solid #a78bfa;
  margin: 0.6em 0;
  padding: 4px 14px;
  color: #94a3b8;
  background: rgba(114, 57, 234, 0.08);
  border-radius: 0 4px 4px 0;
}

.markdown-preview table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.8em 0;
  font-size: 13px;
}
.markdown-preview th,
.markdown-preview td {
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 10px;
  text-align: left;
  color: #e2e8f0;
}
.markdown-preview th {
  background: rgba(255,255,255,0.06);
  font-weight: 600;
  color: #f1f5f9;
}

.markdown-preview hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin: 1.2em 0;
}

/* Pinned tab (README) — no close button */
.editor-tab.pinned .tab-close { display: none; }
.editor-tab.pinned::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #a78bfa;
  margin-right: 2px;
  flex-shrink: 0;
}

/* Monaco Editor Container */
.monaco-container {
  flex: 1;
  overflow: hidden;
  background: var(--bg-code);
  position: relative;
  min-width: 0;
}

.monaco-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-tertiary);
  font-size: 13px;
  gap: 8px;
  text-align: center;
  padding: 24px;
}

.monaco-placeholder-icon {
  font-size: 2.5rem;
  opacity: 0.4;
}

.monaco-placeholder-hint {
  font-size: 11px;
  opacity: 0.6;
}

/* --- Resize Handle (Horizontal) ----------------------------------------- */
.resize-handle {
  width: 5px;
  background: var(--border-color);
  cursor: col-resize;
  transition: background var(--transition);
  position: relative;
  flex-shrink: 0;
}

.resize-handle:hover,
.resize-handle.active {
  background: var(--tesa-primary);
}

.resize-dots {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 3px;
  height: 24px;
  opacity: 0;
  transition: opacity var(--transition);
  /* 3 dots via box-shadow */
  background: #fff;
  border-radius: 1px;
  box-shadow: 0 -8px 0 #fff, 0 8px 0 #fff;
}

.resize-handle:hover .resize-dots {
  opacity: 0.8;
}

/* --- Flowchart Panel (Right) -------------------------------------------- */
#flowchartPanel {
  flex: 4;
  min-width: 200px;
  background: var(--bg-code);
  color: var(--text-code);
}

#flowchartPanel .panel-header {
  background: var(--bg-terminal);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
}

#flowchartPanel .panel-title {
  color: rgba(255, 255, 255, 0.85);
}

#flowchartPanel .panel-title svg {
  fill: rgba(255, 255, 255, 0.85);
}

#flowchartPanel .flowchart-zoom-btn {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.7);
}

#flowchartPanel .flowchart-zoom-btn:hover {
  background: var(--tesa-primary);
  color: #fff;
  border-color: var(--tesa-primary);
}

#flowchartPanel .flowchart-ctrl-divider {
  background: rgba(255, 255, 255, 0.12);
}

#flowchartPanel .panel-badge {
  color: rgba(255, 255, 255, 0.5);
}

.flowchart-close-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.15s ease;
}

.flowchart-close-btn:hover {
  color: #fff;
}

.flowchart-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.flowchart-zoom-btn {
  background: var(--bg-muted);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: var(--border-radius-sm);
  font-size: 10px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background var(--transition), color var(--transition);
}

.flowchart-zoom-btn:hover {
  background: var(--tesa-primary);
  color: #fff;
  border-color: var(--tesa-primary);
}

.flowchart-ctrl-divider {
  display: inline-block;
  width: 1px;
  height: 16px;
  background: var(--border-color);
  margin: 0 4px;
}

.flowchart-fn-btn {
  font-size: 10px;
  background: var(--bg-muted);
  border: 1px solid #4ade80;
  color: #4ade80;
}

.flowchart-fn-btn:hover {
  background: #2d4a3e;
  color: #a7f3d0;
  border-color: #4ade80;
}

.flowchart-export-btn {
  font-size: 10px;
  letter-spacing: 0.04em;
}

.flowchart-svg-wrap {
  flex: 1;
  overflow: auto;
  background: var(--bg-code);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
}

.flowchart-svg-wrap svg {
  max-width: 100%;
}

.flowchart-empty,
.flowchart-error {
  color: var(--text-tertiary);
  font-size: 13px;
  text-align: center;
  padding: 40px;
  align-self: center;
}
.flowchart-error { color: var(--color-danger); }

/* Disabled flowchart button (no main_example.c) */
.flowchart-zoom-btn:disabled,
.flowchart-zoom-btn.disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* ========================================================================= */
/* STATUS BAR                                                                */
/* ========================================================================= */
#statusBar {
  height: var(--statusbar-height);
  background: linear-gradient(90deg, #4a0e0e 0%, #6b1a1a 100%);
  color: rgba(255, 255, 255, 0.85);
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 12px;
  gap: 16px;
  flex-shrink: 0;
}

/* Hide PSoC Edge board info + example count from footer */
#statusBar .status-left { display: none; }

.status-left,
.status-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-left { flex: 1; }
.status-right { flex-shrink: 0; }

.status-item {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.status-item svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
}

.status-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.25);
}

/* ========================================================================= */
/* WELCOME MODAL OVERLAY                                                     */
/* ========================================================================= */
.welcome-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.welcome-modal-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.welcome-card {
  position: relative;
  background: var(--bg-surface);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 92%;
  max-width: 700px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 32px;
  animation: welcomeFadeIn 0.4s ease-out;
}

.welcome-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: var(--bg-muted);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  z-index: 1;
  transition: all var(--transition);
}

.welcome-close:hover {
  background: var(--color-danger);
  color: white;
  transform: scale(1.1);
}

@keyframes welcomeFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes welcomeCardIn {
  from { opacity: 0; transform: scale(0.95) translateY(-20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.welcome-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.welcome-logo {
  width: 40px;
  height: 40px;
  background: var(--tesa-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.welcome-logo svg {
  width: 22px;
  height: 22px;
  fill: white;
}

.welcome-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.2;
}

.welcome-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 2px 0 0;
}

/* Welcome Features Grid */
.welcome-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.welcome-feature {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  background: var(--bg-muted);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: all var(--transition);
}

.welcome-feature:hover {
  border-color: var(--tesa-primary);
  background: var(--tesa-primary-subtle);
}

.welcome-feature-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
}
.welcome-feature-icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.welcome-feature-text h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.welcome-feature-text p {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Welcome Quick Links */
.welcome-links {
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: 8px;
}

.welcome-links-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.welcome-links-grid {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.welcome-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--bg-muted);
  border-radius: var(--border-radius-sm);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.welcome-link:hover {
  background: var(--tesa-primary-subtle);
  color: var(--tesa-primary);
  border-color: var(--tesa-primary-light);
  text-decoration: none;
}

.welcome-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}
.welcome-link-icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.welcome-footer {
  text-align: center;
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

/* ========================================================================= */
/* LANDING EXPLORER (inline full-page, shown before any example is opened)   */
/* ========================================================================= */
.landing-explorer {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-body);
}

.landing-explorer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px 0;
  flex-shrink: 0;
}

.landing-explorer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.landing-explorer-title svg {
  width: 20px;
  height: 20px;
  fill: var(--tesa-primary);
}

/* Help button in Example Explorer header */
.btn-help-explorer {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--tesa-primary);
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  margin-left: 8px;
}
.btn-help-explorer svg {
  width: 14px;
  height: 14px;
  fill: var(--tesa-primary);
}
.btn-help-explorer:hover {
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.35);
  color: var(--tesa-primary-light, #a78bfa);
}
.btn-help-explorer:hover svg {
  fill: var(--tesa-primary-light, #a78bfa);
}

.landing-explorer-toolbar {
  padding: 12px 24px;
  flex-shrink: 0;
}

.landing-explorer .examples-grid {
  flex: 1;
  overflow-y: auto;
  padding: 0 24px 24px;
}

/* ========================================================================= */
/* EXAMPLES OVERLAY                                                          */
/* ========================================================================= */
.examples-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.examples-container {
  background: var(--bg-surface);
  border-radius: 16px;
  width: 94%;
  max-width: 1100px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: welcomeCardIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.examples-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.examples-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.examples-header-left svg {
  width: 18px;
  height: 18px;
  fill: var(--tesa-primary);
}

.examples-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.examples-count {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-tertiary);
}

/* Filters Toolbar */
.examples-toolbar {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.examples-filter-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.examples-filter-group {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: 2px;
}

.filter-divider {
  width: 1px;
  height: 16px;
  background: var(--border-color);
  margin: 0 4px;
}

.examples-chip {
  padding: 4px 12px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  outline: none;
  transition: all var(--transition);
}

.examples-chip:hover {
  border-color: var(--tesa-primary);
  color: var(--tesa-primary);
  background: var(--tesa-primary-subtle);
}

.examples-chip.active {
  background: var(--tesa-primary);
  color: white;
  border-color: var(--tesa-primary);
}

/* Search */
.examples-search-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.examples-search-input {
  flex: 1;
  min-width: 0;
  padding: 7px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-size: 12px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}

.examples-search-input:focus {
  border-color: var(--tesa-primary);
  box-shadow: 0 0 0 3px rgba(114, 57, 234, 0.1);
}

.examples-search-input::placeholder {
  color: var(--text-tertiary);
}

/* Card Grid */
.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  padding: 16px 20px;
  flex: 1;
  overflow-y: auto;
  align-content: start;
}

/* Example Card — Product Card Style */
.example-card {
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  min-height: 220px;
  overflow: hidden;
}

.example-card:hover {
  border-color: #d1d5db;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

/* Thumbnail area — white bg, icon sits naturally like Image 2 ref */
.example-card-thumb {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 12px 20px;
  position: relative;
  overflow: hidden;
  background: #ffffff;
}

.example-card-thumb img {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 8px;
}

.example-card-thumb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
}
.example-card-thumb-placeholder .domain-icon {
  width: 44px;
  height: 44px;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.06));
}

.example-card-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* Domain label — small uppercase like "COURSE" */
.card-domain-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--tesa-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.example-card-title {
  font-size: 14px;
  font-weight: 600;
  color: #111827;
  margin: 0 0 5px 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.example-card-desc {
  font-size: 13px;
  color: #6b7280;
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.example-card-desc:empty::after {
  content: "Click to preview this example";
  font-style: italic;
  opacity: 0.5;
}

.example-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.example-card-tags {
  font-size: 11px;
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.example-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.api-count {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-secondary);
}

.domain-label {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-tertiary);
  text-transform: capitalize;
}

/* Difficulty Badges — outline with dot */
.difficulty-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: #f3f4f6;
  color: #6b7280;
  border: 1px solid #e5e7eb;
}

.difficulty-badge::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.difficulty-badge.beginner::before,
.difficulty-badge[data-level="beginner"]::before { background: #9ca3af; }

.difficulty-badge.intermediate::before,
.difficulty-badge[data-level="intermediate"]::before { background: #7239ea; }

.difficulty-badge.advanced::before,
.difficulty-badge[data-level="advanced"]::before { background: #1f2937; }

.repo-badge {
  display: inline-block;
  font-size: 9px;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: #f3f4f6;
  color: #9ca3af;
  border: 1px solid #e5e7eb;
  margin-left: auto;
}

/* ── View Mode Toggle ── */
.examples-view-toggle {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  margin-left: auto;
  flex-shrink: 0;
}

.examples-view-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition);
}

.examples-view-btn + .examples-view-btn {
  border-left: 1px solid var(--border-color);
}

.examples-view-btn svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.examples-view-btn:hover {
  background: var(--bg-muted);
  color: var(--text-secondary);
}

.examples-view-btn.active {
  background: var(--tesa-primary);
  color: #fff;
}

/* ── List View ── */
.examples-grid[data-view="list"] {
  grid-template-columns: 1fr;
  gap: 4px;
}

.examples-grid[data-view="list"] .example-card {
  flex-direction: row;
  align-items: stretch;
  min-height: auto;
  border-radius: var(--border-radius-sm);
  overflow: visible;
}

.examples-grid[data-view="list"] .example-card:hover {
  transform: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.examples-grid[data-view="list"] .example-card-thumb {
  width: 56px;
  min-height: 56px;
  height: auto;
  flex-shrink: 0;
}

.examples-grid[data-view="list"] .example-card-thumb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}
.examples-grid[data-view="list"] .example-card-thumb-placeholder .domain-icon {
  width: 28px;
  height: 28px;
}

.examples-grid[data-view="list"] .example-card-thumb img {
  border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}

.examples-grid[data-view="list"] .card-domain-label {
  display: none;
}

.examples-grid[data-view="list"] .example-card-body {
  padding: 6px 14px;
  flex: 1;
  min-width: 0;
  justify-content: center;
}

.examples-grid[data-view="list"] .example-card-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
}

.examples-grid[data-view="list"] .example-card-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  -webkit-line-clamp: unset;
  -webkit-box-orient: unset;
}

.examples-grid[data-view="list"] .example-card-footer {
  display: none;
}

/* List view: show inline badges (hidden in grid) */
.example-card-list-badges {
  display: none;
}

.examples-grid[data-view="list"] .example-card-list-badges {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 3px;
}

/* ── Responsive overrides for view modes ── */
@media (max-width: 640px) {
  .examples-grid[data-view="list"] .example-card-desc {
    display: none;
  }
  .examples-view-toggle {
    display: none;
  }
}

/* Empty state in grid */
.examples-empty {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  color: var(--text-tertiary);
}

.examples-empty-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* ========================================================================= */
/* EXAMPLE PREVIEW MODAL                                                     */
/* ========================================================================= */
.example-preview {
  position: fixed;
  inset: 0;
  z-index: 950;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-card {
  background: var(--bg-surface);
  border-radius: 16px;
  width: 90%;
  max-width: 800px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  animation: welcomeCardIn 0.25s ease-out;
  overflow: hidden;
}

.preview-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.preview-meta { flex: 1; }

.preview-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px;
}

.preview-description {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0 0 8px;
  line-height: 1.5;
}

.preview-badges {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 6px;
}

.preview-tag {
  display: inline-block;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(114, 57, 234, 0.08);
  color: var(--tesa-primary);
  font-weight: 500;
}

.preview-apis {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.preview-apis-label {
  font-weight: 600;
  color: var(--text-tertiary);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.preview-api {
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--bg-code);
  color: var(--text-code);
}

.preview-content {
  flex: 1;
  overflow: auto;
  position: relative;
}

/* README Markdown Content */
.readme-content {
  padding: 20px 24px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  min-height: 200px;
}

.readme-loading {
  color: var(--text-tertiary);
  text-align: center;
  padding: 40px;
}

.readme-content h1 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.readme-content h2 {
  font-size: 17px;
  font-weight: 600;
  margin: 20px 0 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
}

.readme-content h3 {
  font-size: 14px;
  font-weight: 600;
  margin: 16px 0 6px;
}

.readme-content h4 {
  font-size: 13px;
  font-weight: 600;
  margin: 12px 0 4px;
}

.readme-content p {
  margin: 8px 0;
}

.readme-content ul,
.readme-content ol {
  margin: 8px 0;
  padding-left: 24px;
}

.readme-content li {
  margin: 4px 0;
}

.readme-content code {
  background: var(--bg-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--tesa-primary);
}

.readme-content pre {
  background: var(--bg-code);
  border-radius: var(--border-radius-sm);
  padding: 14px 16px;
  margin: 10px 0;
  overflow-x: auto;
}

.readme-content pre code {
  background: none;
  padding: 0;
  color: var(--text-code);
  font-size: 12px;
  line-height: 1.6;
}

.readme-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 12px;
}

.readme-content th,
.readme-content td {
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  text-align: left;
}

.readme-content th {
  background: var(--bg-muted);
  font-weight: 600;
}

.readme-content blockquote {
  border-left: 3px solid var(--tesa-primary);
  margin: 10px 0;
  padding: 8px 16px;
  background: var(--tesa-primary-subtle);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  color: var(--text-secondary);
}

.readme-content a {
  color: var(--tesa-primary);
}

.readme-content img {
  max-width: 100%;
  border-radius: var(--border-radius-sm);
  margin: 8px 0;
}

.preview-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 24px;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

/* ========================================================================= */
/* HELP PANEL (Slide-out from Right)                                         */
/* ========================================================================= */
.help-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.help-overlay.open {
  opacity: 1;
  visibility: visible;
}

.help-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 520px;
  min-width: 380px;
  max-width: 700px;
  height: 100vh;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-color);
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.help-panel.open {
  transform: translateX(0);
}

.help-resize-handle {
  position: absolute;
  left: -3px;
  top: 0;
  width: 6px;
  height: 100%;
  cursor: col-resize;
  z-index: 10;
  background: transparent;
  transition: background 0.2s ease;
}

.help-resize-handle:hover,
.help-resize-handle.active {
  background: var(--tesa-primary);
  opacity: 0.5;
}

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  gap: 8px;
}
.help-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.help-lang-pill {
  display: flex;
  background: var(--bg-muted);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}
.help-lang-opt {
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-sans);
}
.help-lang-opt.active {
  background: var(--tesa-primary);
  color: #fff;
  border-radius: 6px;
}
.help-lang-opt:hover:not(.active) {
  color: var(--text-primary);
}

.help-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.help-title svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  opacity: 0.7;
}

/* ── Pin button ──────────────────────────────────────────────────── */
.help-pin-btn {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.help-pin-btn:hover {
  background: var(--bg-muted);
  color: var(--text-primary);
}
.help-pin-btn.pinned {
  color: var(--tesa-primary);
  background: rgba(114, 57, 234, 0.1);
}
.help-overlay.pinned-hidden {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

.help-close {
  width: 28px;
  height: 28px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.help-close:hover {
  background: var(--color-danger);
  color: white;
}

.help-search {
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}

.help-search input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition);
  background: var(--bg-muted);
  color: var(--text-primary);
}

.help-search input:focus {
  border-color: var(--tesa-primary);
  box-shadow: 0 0 0 3px rgba(114, 57, 234, 0.1);
}

.help-search input::placeholder {
  color: var(--text-tertiary);
}

.help-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px 18px;
}

/* Module Section */
.help-module {
  margin-bottom: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.help-module-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-muted);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}

.help-module-header:hover {
  background: var(--tesa-primary-subtle, rgba(114, 57, 234, 0.06));
}

.help-module-chevron {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.help-module-chevron::before {
  content: '';
  display: block;
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--text-tertiary);
  border-bottom: 2px solid var(--text-tertiary);
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
}

.help-module.collapsed .help-module-chevron::before {
  transform: rotate(45deg);
}

.help-module-name {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.help-import {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--tesa-primary);
  background: rgba(114, 57, 234, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
}

.help-module-body {
  padding: 10px 14px;
}

.help-module.collapsed .help-module-body {
  display: none;
}

.help-module-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  line-height: 1.5;
}

/* ── Function Entry (beginner-friendly cards) ─────────────────────── */
.help-fn-entry {
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-primary);
  transition: border-color var(--transition);
}
.help-fn-entry:hover {
  border-color: rgba(114, 57, 234, 0.3);
}

/* Function name row — large and clear */
.help-fn-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.help-fn-icon {
  font-size: 16px;
  flex-shrink: 0;
}
.help-fn-title {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--tesa-primary);
  word-break: break-all;
}

/* Signature block — compact mono */
.help-fn-sig-block {
  margin-bottom: 10px;
  padding: 6px 10px;
  background: var(--bg-code, #1e1e2e);
  border-radius: 6px;
  overflow-x: auto;
}
.help-fn-sig-block code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-code, #d4d4d4);
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.5;
}

/* "What it does" description — prominent */
.help-fn-what {
  margin-bottom: 12px;
}
.help-fn-what-label {
  display: block;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}
.help-fn-what p {
  margin: 0;
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.6;
}

/* ── Collapsible detail sections ─────────────────────────────────── */
.help-detail-section {
  margin-bottom: 6px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}
.help-detail-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  background: var(--bg-muted);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}
.help-detail-toggle:hover {
  background: rgba(114, 57, 234, 0.06);
}
.help-detail-chevron {
  width: 12px;
  height: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.help-detail-chevron::before {
  content: '';
  display: block;
  width: 5px;
  height: 5px;
  border-right: 1.5px solid var(--text-tertiary);
  border-bottom: 1.5px solid var(--text-tertiary);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}
.help-detail-section.open .help-detail-chevron::before {
  transform: rotate(-45deg);
}
.help-detail-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}
.help-detail-count {
  font-size: 10px;
  color: var(--text-tertiary);
  background: rgba(255,255,255,0.06);
  padding: 0 5px;
  border-radius: 6px;
}
.help-detail-body {
  display: none;
  padding: 8px 10px;
}
.help-detail-section.open .help-detail-body {
  display: block;
}

/* ── Parameter table ─────────────────────────────────────────────── */
.help-param-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}
.help-param-table tr + tr {
  border-top: 1px solid var(--border-color);
}
.help-param-table td {
  padding: 5px 0;
  vertical-align: top;
}
.help-param-name {
  white-space: nowrap;
  padding-right: 10px !important;
  width: 1%;
}
.help-param-name code {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--tesa-primary);
  background: rgba(114, 57, 234, 0.08);
  padding: 1px 6px;
  border-radius: 3px;
}
.help-param-desc {
  color: var(--text-secondary);
  line-height: 1.5;
}
.help-param-header {
  font-weight: 600;
  font-size: 11px;
  color: var(--text-primary);
  padding-top: 8px !important;
  padding-bottom: 2px !important;
  letter-spacing: 0.02em;
}
.help-returns-intro {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0 0 4px 0;
}

/* ── Returns content ─────────────────────────────────────────────── */
.help-returns-content {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

/* ── Footer badges (thread safety + header file) ─────────────────── */
.help-fn-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}
.help-fn-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
}
.help-fn-badge.safe {
  color: var(--color-success);
  background: rgba(80, 205, 137, 0.1);
}
.help-fn-badge.warn {
  color: var(--color-warning, #ffb74d);
  background: rgba(255, 183, 77, 0.1);
}
.help-fn-badge.header {
  color: var(--text-tertiary);
  background: var(--bg-muted);
}
.help-fn-badge.header code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: inherit;
}

.help-fn-count {
  font-size: 10px;
  color: var(--text-tertiary);
  background: rgba(255,255,255,0.06);
  padding: 2px 8px;
  border-radius: 8px;
  margin-left: auto;
  flex-shrink: 0;
}

.help-fn-returns {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-success);
  background: rgba(80, 205, 137, 0.1);
  padding: 1px 6px;
  border-radius: 3px;
}

.help-fn-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Code block wrapper with copy button ─────────────────────────── */
.help-code-block {
  position: relative;
  margin: 0;
}
.help-code-copy {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 1;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 4px;
  color: rgba(255,255,255,0.45);
  cursor: pointer;
  padding: 3px 5px;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
}
.help-code-block:hover .help-code-copy { opacity: 1; }
.help-code-copy:hover { background: rgba(255,255,255,0.15); color: rgba(255,255,255,0.8); }
.help-code-copy.copied { background: #4caf50; color: #fff; border-color: #4caf50; opacity: 1; }

.help-example {
  margin: 0;
  padding: 10px 12px;
  background: var(--bg-code);
  border-radius: 6px;
  overflow-x: auto;
}

.help-example code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-code);
  line-height: 1.6;
  white-space: pre;
  background: transparent;
}

/* Syntax highlighting tokens */
.help-example .c-kw   { color: #c586c0; }
.help-example .c-str  { color: #ce9178; }
.help-example .c-cmt  { color: #6a9955; font-style: italic; }
.help-example .c-num  { color: #b5cea8; }
.help-example .c-fn   { color: #4ec9b0; }
.help-example .c-type { color: #569cd6; }
.help-example .c-pre  { color: #d7ba7d; }
.help-example .c-macro { color: #dcdcaa; }
.help-fn-sig-block .c-kw   { color: #c586c0; }
.help-fn-sig-block .c-str  { color: #ce9178; }
.help-fn-sig-block .c-cmt  { color: #6a9955; font-style: italic; }
.help-fn-sig-block .c-num  { color: #b5cea8; }
.help-fn-sig-block .c-fn   { color: #4ec9b0; }
.help-fn-sig-block .c-type { color: #569cd6; }
.help-fn-sig-block .c-pre  { color: #d7ba7d; }
.help-fn-sig-block .c-macro { color: #dcdcaa; }

/* ── Section titles & submodules ─────────────────────────────────── */
.help-submodule-title,
.help-section-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 14px 0 8px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
}

.help-fn-compact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  padding: 4px 0;
}

.help-fn-compact .help-fn-name {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--tesa-primary);
}

.help-fn-compact .help-fn-desc {
  font-size: 11px;
  flex: 1;
  min-width: 120px;
}

/* Constants */
.help-constants {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.help-constants code {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
  background: var(--bg-muted);
  padding: 2px 6px;
  border-radius: 3px;
}

/* Related Examples links */
.help-related-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}
.help-example-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--tesa-primary);
  background: var(--bg-muted);
  padding: 4px 10px;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
}
.help-example-link:hover {
  background: var(--tesa-primary);
  color: white;
}
.help-example-icon {
  font-size: 12px;
}

/* Empty state */
.help-empty {
  text-align: center;
  padding: 40px 20px;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ========================================================================= */
/* ANIMATIONS                                                                */
/* ========================================================================= */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ========================================================================= */
/* EDITOR LOADING MODAL                                                      */
/* ========================================================================= */
.editor-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.editor-loading-overlay.hidden { display: none; }

.editor-loading-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px 48px;
  text-align: center;
  min-width: 340px;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.editor-loading-icon {
  color: var(--tesa-primary);
  margin-bottom: 16px;
  animation: editorLoadingPulse 1.5s ease-in-out infinite;
}

@keyframes editorLoadingPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.editor-loading-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.editor-loading-status {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 18px;
}

.editor-loading-bar-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.editor-loading-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--tesa-primary), #a855f7);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.editor-loading-percent {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 8px;
}

/* ========================================================================= */
/* RESPONSIVE                                                                */
/* ========================================================================= */
/* Old template-modal and template-btn-row CSS removed — now uses Smart Download */

.btn-spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  vertical-align: middle;
}

/* =========================================================================
   MOBILE / PHONE BREAKPOINTS — Public examples browsing only.
   The IDE/editor view is gated separately by a JS guard
   (see openInEditor() in examples-explorer.js + #mobile-editor-guard
   modal in index.html). These rules make the landing Example Explorer,
   preview modal, README viewer, and Help panel usable on phones.
   ========================================================================= */
@media (max-width: 768px) {
  /* --- Header & status bar --- */
  #header { padding: 0 12px; }
  .header-left, .header-right { gap: 8px; }
  .header-center { display: none; }
  .logo-subtitle { display: none; }
  .header-badge { font-size: 10px; padding: 3px 8px; }

  #statusBar { padding: 0 8px; gap: 8px; font-size: 10px; }
  #statusBar .status-right .status-item + .status-divider + .status-item { display: none; }
  #statusBar .status-right .status-item + .status-divider { display: none; }

  /* Editor panels are blocked on phone via JS, but keep stacked layout safe */
  #main { flex-direction: column; }
  .resize-handle { display: none; }
  #editorPanel, #flowchartPanel { flex: 1; min-width: 0; }
  .file-tree, .file-tree-resize { display: none; }

  /* --- Landing Example Explorer (primary mobile target) --- */
  .landing-explorer-header { padding: 12px 12px 0; flex-wrap: wrap; gap: 8px; }
  .landing-explorer-title { font-size: 15px; gap: 6px; }
  .btn-help-explorer { padding: 4px 10px; font-size: 11px; margin-left: 0; }
  .landing-explorer-toolbar { padding: 10px 12px; }
  .landing-explorer .examples-grid { padding: 0 12px 16px; }

  /* --- Filter chips --- */
  .examples-filter-row { gap: 10px; margin-bottom: 8px; }
  .examples-filter-group { gap: 4px; }
  .filter-label { font-size: 10px; }
  .examples-chip { padding: 6px 11px; font-size: 11px; min-height: 30px; line-height: 1.2; }
  .filter-divider { display: none; }

  /* --- Search row --- */
  .examples-search-row { gap: 8px; }
  .examples-search-input { padding: 9px 12px; font-size: 13px; }

  /* --- Card grid: single column on phone --- */
  .examples-grid { grid-template-columns: 1fr; gap: 10px; padding: 12px; }
  .example-card { border-radius: 10px; }

  /* --- Examples overlay (when "Examples" button opens it) --- */
  .examples-overlay { padding: 0; }
  .examples-container { width: 100%; height: 100%; max-height: 100%; max-width: 100%; border-radius: 0; }
  .examples-header { padding: 14px 14px; }
  .examples-toolbar { padding: 10px 12px; }

  /* --- Example preview modal: full-screen on phone --- */
  .preview-card { width: 100%; max-width: 100%; height: 100%; max-height: 100%; border-radius: 0; }

  /* --- Welcome modal --- */
  .welcome-card { width: 96%; max-height: 92vh; overflow-y: auto; }
  .welcome-features { grid-template-columns: 1fr; }

  /* --- Help panel (API reference) --- */
  .help-panel { width: 100%; max-width: 100%; }
  .help-resize-handle { display: none; }

  /* --- Smart Download + README viewer modals --- */
  .smart-download-popup,
  .readme-viewer-popup { width: 100%; max-width: 100%; height: 100%; max-height: 100%; border-radius: 0; }
}

@media (max-width: 480px) {
  /* Extra compaction for narrow phones (≤iPhone SE width) */
  .header-badge { display: none; }
  .logo-text { font-size: 0.95rem; }

  /* Filter groups become horizontally scrollable rows so chips stay one-line */
  .examples-filter-row { flex-direction: column; align-items: stretch; gap: 8px; }
  .examples-filter-group {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
    scrollbar-width: none;
  }
  .examples-filter-group::-webkit-scrollbar { display: none; }
  .filter-label { flex-shrink: 0; }
  .examples-chip { flex-shrink: 0; }
}

/* ================================================================= */
/* Smart Download Popup + Template Badge                              */
/* ================================================================= */

/* Template badge on example cards */
.template-badge-icon {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 20px;
  height: 20px;
  opacity: 0.5;
  transition: opacity 0.2s;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.3));
}
.examples-card:hover .template-badge-icon { opacity: 1; }

/* "Project Template" button in preview */
.btn-outline-purple {
  border: 1px solid var(--purple, #a855f7);
  color: var(--purple, #a855f7);
  background: transparent;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-outline-purple:hover {
  background: var(--purple-light, rgba(168,85,247,0.1));
}

/* Smart Download Overlay */
.smart-download-overlay {
  position: fixed;
  inset: 0;
  z-index: 11000;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.smart-download-popup {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 640px;
  max-width: 95vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
  overflow: hidden;
}

.sdl-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--border-color);
}
.sdl-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}
.sdl-header svg { color: var(--tesa-primary); }

.sdl-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px;
}

.sdl-loading, .sdl-error, .sdl-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 14px;
}

.sdl-category {
  margin-bottom: 16px;
}
.sdl-category-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}

.sdl-card {
  background: var(--bg-muted, #f1f3f5);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 8px;
  transition: border-color 0.15s;
}
.sdl-card:hover { border-color: var(--tesa-primary); }
.sdl-card.recommended {
  border-color: var(--color-success, #50cd89);
  background: rgba(80,205,137,0.06);
}
.sdl-card-recommended-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-success, #50cd89);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}
.sdl-card-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--tesa-primary);
  margin-bottom: 4px;
}
.sdl-card-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  line-height: 1.5;
}
.sdl-card-sha {
  font-size: 11px;
  color: var(--text-tertiary);
  font-family: monospace;
  margin-bottom: 8px;
}
.sdl-card-quickstart {
  margin-bottom: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}
.sdl-card-quickstart summary {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
}
.sdl-card-quickstart ol {
  margin: 0 0 10px;
  padding: 0 12px 0 30px;
  font-size: 12px;
  color: var(--text-secondary);
}
.sdl-card-quickstart li { margin-bottom: 4px; }

.sdl-card-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.sdl-btn-readme {
  padding: 6px 14px;
  font-size: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-surface, #fff);
  color: var(--text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}
.sdl-btn-readme:hover { border-color: var(--tesa-primary); color: var(--tesa-primary); }
.sdl-btn-download {
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  background: var(--tesa-primary);
  color: white;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}
.sdl-btn-download:hover { background: var(--tesa-primary-hover); }

.sdl-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
}

/* ─── README Viewer Modal ────────────────────────────────────────────── */

.readme-viewer-overlay {
  position: fixed;
  inset: 0;
  z-index: 12000;
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.readme-viewer-popup {
  background: var(--bg-surface, #ffffff);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 860px;
  max-width: 95vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.18);
  overflow: hidden;
}

.readme-viewer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 24px;
  border-bottom: 2px solid var(--tesa-primary);
  flex-shrink: 0;
}
.readme-viewer-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--tesa-primary);
}

.readme-viewer-body {
  flex: 1;
  overflow-y: auto;
  padding: 24px 32px;
  line-height: 1.7;
  color: var(--text-primary);
}

/* Markdown rendering styles */
.readme-viewer-body h1 {
  font-size: 26px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  margin: 0 0 16px;
}
.readme-viewer-body h2 {
  font-size: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  margin: 28px 0 12px;
}
.readme-viewer-body h3 { font-size: 16px; margin: 24px 0 8px; }
.readme-viewer-body p { margin: 0 0 12px; }
.readme-viewer-body ul, .readme-viewer-body ol { padding-left: 24px; margin: 0 0 12px; }
.readme-viewer-body li { margin-bottom: 4px; }
.readme-viewer-body code {
  background: var(--bg-muted, #f3f4f6);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
}
.readme-viewer-body pre {
  background: var(--bg-code, #1e1e2d);
  color: #d4d4d4;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
  margin: 0 0 16px;
}
.readme-viewer-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.readme-viewer-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 0 0 16px;
}
.readme-viewer-body th, .readme-viewer-body td {
  border: 1px solid var(--border-color);
  padding: 8px 12px;
  text-align: left;
  font-size: 13px;
}
.readme-viewer-body th {
  background: var(--bg-muted, #f3f4f6);
  font-weight: 600;
}
.readme-viewer-body img { max-width: 100%; border-radius: 8px; }
.readme-viewer-body blockquote {
  border-left: 4px solid var(--tesa-primary);
  margin: 16px 0;
  padding: 8px 16px;
  color: var(--text-secondary);
  background: var(--tesa-primary-subtle, #f5f0ff);
}
.readme-viewer-body a { color: var(--tesa-primary); }

.readme-viewer-footer {
  padding: 14px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  flex-shrink: 0;
}