:root {
  /* Světlé modré tóny (Light Blue Palette) */
  --bg-primary: #f0f7ff;
  --bg-secondary: #e0f2fe;
  --bg-tertiary: #bae6fd;
  --bg-elevated: #ffffff;
  --bg-editor: #f8fbfe;
  --text-main: #0f172a;
  --text-muted: #334155;
  --text-dim: #64748b;

  /* Oranžové detaily & Akcenty (Orange Details) */
  --accent-orange: #f97316;
  --accent-orange-hover: #ea580c;
  --accent-orange-deep: #c2410c;
  --accent-orange-light: #ffedd5;
  --accent-orange-subtle: #ffedd5;
  --accent-orange-text: #c2410c;
  --accent-orange-border: #fed7aa;
  --accent-orange-glow: rgba(249, 115, 22, 0.35);

  /* Funkční akcenty */
  --accent-primary: #f97316;
  --accent-hover: #ea580c;
  --accent-cyan: #0284c7;
  --accent-indigo: #6366f1;
  --accent-success: #16a34a;
  --accent-danger: #ef4444;
  --accent-warning: #f59e0b;
  --accent-css: #0284c7;
  --accent-html: #ea580c;
  --accent-js: #d97706;

  /* Rámečky a podklad */
  --border-color: #bae6fd;
  --border-subtle: rgba(2, 132, 199, 0.14);
  --console-bg: #f8fbfe;
  --console-border: #bae6fd;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* Custom Scrollbary */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: #93c5fd;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-orange);
}

/* =========================================================================
   Hlavička & Nástrojová lišta (Header & Toolbar)
   ========================================================================= */
header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 6px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  z-index: 50;
  height: 48px;
  box-shadow: 0 2px 10px rgba(186, 230, 253, 0.4);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: default;
}

.logo-icon {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #ffffff;
  font-weight: 900;
  font-size: 11.5px;
  border-radius: 6px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.5px;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.4);
}

.logo-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.3px;
}

.logo-tag {
  background: var(--accent-orange-light);
  color: var(--accent-orange-deep);
  border: 1px solid var(--accent-orange-border);
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
}

/* Volič lekcí */
.lesson-control {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lesson-label {
  font-size: 11.5px;
  color: var(--text-muted);
  font-weight: 700;
  white-space: nowrap;
}

.dropdown {
  background-color: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12.5px;
  font-family: inherit;
  font-weight: 500;
  outline: none;
  cursor: pointer;
  max-width: 320px;
  text-overflow: ellipsis;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(186, 230, 253, 0.4);
}

.dropdown:focus {
  border-color: var(--accent-orange);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.2);
}

.btn-nav-step {
  padding: 5px 8px;
  font-size: 10px;
  line-height: 1;
  background-color: #ffffff;
  color: var(--accent-blue);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  box-shadow: 0 1px 3px rgba(186, 230, 253, 0.4);
}

.btn-nav-step:hover:not(:disabled) {
  background-color: var(--accent-orange-light);
  color: var(--accent-orange-deep);
  border-color: var(--accent-orange);
}

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

.dropdown optgroup {
  background-color: var(--bg-secondary);
  color: var(--accent-orange-deep);
  font-weight: 700;
  font-style: normal;
}

.dropdown option {
  background-color: #ffffff;
  color: var(--text-main);
  padding: 4px;
}

/* Tlačítka v Toolbaru */
.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn {
  background-color: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 5px 11px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
  white-space: nowrap;
  user-select: none;
  box-shadow: 0 1px 2px rgba(186, 230, 253, 0.3);
}

.btn:hover {
  background-color: var(--accent-orange-light);
  color: var(--accent-orange-deep);
  border-color: var(--accent-orange-border);
}

/* Primární akční tlačítko Spustit s oranžovým gradientem */
.btn-primary {
  background: linear-gradient(135deg, #f97316, #ea580c);
  color: #ffffff;
  border: 1px solid #ea580c;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.35);
}

.btn-primary:hover {
  background: #ea580c;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(249, 115, 22, 0.5);
  transform: translateY(-1px);
}

/* Tlačítko Inspektor s oranžovým akcentem */
.btn-accent {
  background-color: var(--accent-orange-light);
  color: var(--accent-orange-deep);
  border-color: var(--accent-orange-border);
}

.btn-accent:hover,
.btn-accent.active {
  background-color: var(--accent-orange);
  color: #ffffff;
  border-color: var(--accent-orange-hover);
  box-shadow: 0 2px 10px rgba(249, 115, 22, 0.4);
}

.btn-success {
  background-color: #0284c7;
  color: #ffffff;
  border: 1px solid #0369a1;
}

.btn-success:hover {
  background-color: #0369a1;
}

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

.autorun-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  margin: 0 4px;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.2s;
}

.autorun-toggle:hover {
  background: var(--bg-tertiary);
  color: var(--text-main);
}

.autorun-toggle input {
  cursor: pointer;
  accent-color: var(--accent-orange);
}

/* =========================================================================
   Hlavní Split Layout
   ========================================================================= */
.main-container {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* Levý panel (Editory & Zadání) */
.left-pane {
  width: 50%;
  min-width: 280px;
  max-width: 80%;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
}

.tab-bar {
  display: flex;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 8px;
  height: 38px;
  flex-shrink: 0;
  gap: 4px;
  align-items: flex-end;
}

.tab-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  padding: 7px 14px;
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  height: 34px;
}

.tab-btn:hover {
  color: var(--text-main);
  background-color: rgba(2, 132, 199, 0.08);
}

.tab-btn.active {
  color: var(--text-main);
  background-color: var(--bg-primary);
  border-color: var(--border-color);
  position: relative;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent-orange);
  border-radius: 2px 2px 0 0;
}

.tab-tag {
  font-size: 10px;
  font-weight: 800;
  padding: 1px 4px;
  border-radius: 3px;
}

.tag-css { background: rgba(2, 132, 199, 0.15); color: #0284c7; }
.tag-html { background: var(--accent-orange-subtle); color: var(--accent-orange-text); }
.tag-js { background: rgba(245, 158, 11, 0.15); color: #d97706; }
.tag-task { font-size: 12px; }

.editor-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.editor-pane {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
}

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

/* =========================================================================
   CodeMirror Light Editor Theme (Světlý podklad s oranžovými akcenty)
   ========================================================================= */
.CodeMirror {
  height: 100% !important;
  font-family: 'Fira Code', 'Cascadia Code', Consolas, monospace !important;
  font-size: 13px !important;
  line-height: 1.55 !important;
  background-color: #f8fbfe !important;
  color: #0f172a !important;
}

.cm-s-dracula.CodeMirror {
  background-color: #f8fbfe !important;
  color: #0f172a !important;
}

.cm-s-dracula .CodeMirror-gutters,
.CodeMirror-gutters {
  background-color: #eaf3fb !important;
  border-right: 1px solid var(--border-color) !important;
}

.cm-s-dracula .CodeMirror-linenumber,
.CodeMirror-linenumber {
  color: #94a3b8 !important;
  padding: 0 5px 0 3px !important;
}

.cm-s-dracula .CodeMirror-cursor,
.CodeMirror-cursor {
  border-left: 2px solid var(--accent-orange) !important;
}

.cm-s-dracula div.CodeMirror-selected,
.CodeMirror-selected {
  background: #fed7aa !important;
}

.cm-s-dracula.CodeMirror-focused div.CodeMirror-selected {
  background: #ffedd5 !important;
}

.cm-s-dracula .CodeMirror-line::selection,
.cm-s-dracula .CodeMirror-line > span::selection,
.cm-s-dracula .CodeMirror-line > span > span::selection {
  background: #fed7aa !important;
}

.cm-s-dracula .CodeMirror-activeline-background {
  background: rgba(224, 242, 254, 0.45) !important;
}

/* Syntax Highlighting */
.cm-s-dracula span.cm-comment { color: #94a3b8 !important; font-style: italic; }
.cm-s-dracula span.cm-tag { color: #ea580c !important; font-weight: 700; }
.cm-s-dracula span.cm-attribute { color: #0284c7 !important; }
.cm-s-dracula span.cm-string { color: #16a34a !important; }
.cm-s-dracula span.cm-qualifier { color: #d97706 !important; font-weight: 600; }
.cm-s-dracula span.cm-builtin { color: #f97316 !important; font-weight: 600; }
.cm-s-dracula span.cm-property { color: #0284c7 !important; font-weight: 600; }
.cm-s-dracula span.cm-number { color: #ea580c !important; }
.cm-s-dracula span.cm-atom { color: #7c3aed !important; }
.cm-s-dracula span.cm-keyword { color: #c2410c !important; font-weight: 700; }
.cm-s-dracula span.cm-variable { color: #0f172a !important; }
.cm-s-dracula span.cm-variable-2 { color: #0284c7 !important; }
.cm-s-dracula span.cm-operator { color: #64748b !important; }
.cm-s-dracula span.cm-def { color: #2563eb !important; }
.cm-s-dracula .CodeMirror-matchingbracket {
  border-bottom: 2px solid var(--accent-orange) !important;
  color: #0f172a !important;
  font-weight: bold;
}

/* Záložka Zadání & Nápověda */
.task-pane {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  padding: 24px;
  overflow-y: auto;
  user-select: text;
  background-color: var(--bg-primary);
  line-height: 1.6;
}

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

.task-pane h2 {
  font-size: 20px;
  color: var(--text-main);
  margin-bottom: 8px;
}

.theory-badge {
  display: inline-block;
  background: var(--accent-orange-subtle);
  color: var(--accent-orange-text);
  border: 1px solid var(--accent-orange-border);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.task-pane p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 14px;
}

.task-pane ul {
  margin: 0 0 16px 20px;
  color: #334155;
  font-size: 13.5px;
}

.task-pane li {
  margin-bottom: 6px;
}

.task-pane code {
  font-family: 'Fira Code', monospace;
  background: #e0f2fe;
  color: var(--accent-orange-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12.5px;
  border: 1px solid #bae6fd;
}

.tasks-card {
  background: #f8fbfe;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 18px;
  margin-top: 20px;
}

.tasks-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.tasks-card-title {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-main);
}

.tasks-card-counter {
  font-size: 11px;
  font-weight: 700;
  background: var(--accent-orange-subtle);
  color: var(--accent-orange-text);
  border: 1px solid var(--accent-orange-border);
  padding: 2px 8px;
  border-radius: 10px;
  transition: all 0.2s;
}

.task-item {
  margin-bottom: 12px;
}

.task-header {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 4px;
}

.task-checkbox {
  margin-top: 3px;
  cursor: pointer;
  accent-color: var(--accent-orange);
}

.task-label {
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-main);
}

.task-desc {
  padding-left: 22px;
  font-size: 12.5px;
  color: var(--text-muted);
}

/* Svislý Resizer */
.pane-resizer {
  width: 6px;
  background-color: var(--border-color);
  cursor: col-resize;
  position: relative;
  transition: background-color 0.2s;
  flex-shrink: 0;
}

.pane-resizer:hover,
.pane-resizer:active {
  background-color: var(--accent-orange);
}

.pane-resizer-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 2px;
  height: 24px;
  background-color: var(--text-dim);
  border-radius: 1px;
}

/* =========================================================================
   Pravý panel (Náhled & Spodní panel)
   ========================================================================= */
.right-pane {
  flex: 1;
  min-width: 300px;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  overflow: hidden;
}

/* Hlavička náhledu */
.preview-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 12px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  gap: 8px;
}

.preview-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
}

.preview-tools-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-subtle {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 11.5px;
  font-family: inherit;
  padding: 3px 8px;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-subtle:hover {
  background: var(--bg-tertiary);
  color: var(--text-main);
}

.btn-subtle.active {
  background: var(--accent-orange-subtle);
  color: var(--accent-orange-text);
  border-color: var(--accent-orange);
}

.device-switcher {
  display: flex;
  background-color: #ffffff;
  padding: 2px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.device-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}

.device-btn:hover {
  color: var(--text-main);
}

.device-btn.active {
  background-color: var(--accent-orange-subtle);
  color: var(--accent-orange-text);
  font-weight: 700;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 11.5px;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 6px;
  border-radius: 4px;
}

.btn-icon:hover {
  color: var(--text-main);
  background: var(--bg-tertiary);
}

/* Rám a viewport náhledu */
.preview-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  background-color: #e0f2fe;
  background-image: radial-gradient(rgba(2, 132, 199, 0.12) 1px, transparent 1px);
  background-size: 16px 16px;
  position: relative;
  padding: 10px;
}

.preview-frame-wrapper {
  height: 100%;
  position: relative;
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.12);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.preview-frame-wrapper.device-desktop {
  width: 100%;
}

.preview-frame-wrapper.device-tablet {
  width: 768px;
  max-width: 100%;
}

.preview-frame-wrapper.device-mobile {
  width: 375px;
  max-width: 100%;
}

/* Režimy pozadí náhledu */
.preview-frame-wrapper.bg-dark {
  background-color: #0f172a;
}

.preview-frame-wrapper.bg-light {
  background-color: #ffffff;
}

.preview-frame-wrapper.bg-checkerboard {
  background-color: #ffffff;
  background-image: linear-gradient(45deg, #e2e8f0 25%, transparent 25%),
                    linear-gradient(-45deg, #e2e8f0 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, #e2e8f0 75%),
                    linear-gradient(-45deg, transparent 75%, #e2e8f0 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Pomocná mřížka */
.preview-grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 10;
  display: none;
  background-size: 20px 20px;
  background-image: 
    linear-gradient(to right, rgba(249, 115, 22, 0.2) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(249, 115, 22, 0.2) 1px, transparent 1px);
}

.preview-grid-overlay.active {
  display: block;
}

#preview-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Vodorovný Resizer spodního panelu */
.bottom-pane-resizer {
  height: 6px;
  background-color: var(--border-color);
  cursor: row-resize;
  position: relative;
  transition: background-color 0.2s;
  flex-shrink: 0;
}

.bottom-pane-resizer:hover,
.bottom-pane-resizer:active {
  background-color: var(--accent-orange);
}

.bottom-pane-resizer-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 2px;
  background-color: var(--text-dim);
  border-radius: 1px;
}

/* Spodní panel (Box Model / Konzole) */
.bottom-details-pane {
  height: 200px;
  min-height: 80px;
  max-height: 500px;
  background-color: var(--console-bg);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.bottom-tab-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 10px;
  height: 32px;
  flex-shrink: 0;
}

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

.bottom-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}

.bottom-tab-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-tertiary);
}

.bottom-tab-btn.active {
  color: var(--accent-orange-text);
  background-color: var(--accent-orange-subtle);
  font-weight: 700;
}

.badge-counter {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 8px;
  display: none;
}

.badge-counter.visible {
  display: inline-block;
  background: var(--accent-danger);
  color: #ffffff;
}

.bottom-pane-content {
  flex: 1;
  overflow: auto;
  position: relative;
  background-color: #f8fbfe;
}

/* =========================================================================
   Vizuální Box Model Inspektor (Styles)
   ========================================================================= */
.inspector-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
}

.inspector-empty-icon {
  font-size: 28px;
  margin-bottom: 8px;
  opacity: 0.7;
}

.inspector-empty-title {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 6px;
}

.inspector-empty-desc {
  max-width: 440px;
  font-size: 12.5px;
  line-height: 1.5;
}

.inspector-result-grid {
  padding: 12px 16px;
}

.inspector-meta-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}

.inspector-elem-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Fira Code', monospace;
  font-size: 12.5px;
}

.elem-tag { color: var(--accent-orange-text); font-weight: 700; }
.elem-id { color: #0284c7; font-weight: 600; }
.elem-class { color: #6366f1; }

.elem-dims-badge {
  background: var(--bg-tertiary);
  color: var(--text-main);
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
  font-family: inherit;
  border: 1px solid var(--border-color);
}

.inspector-content-split {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.box-model-container {
  flex: 1;
  min-width: 240px;
}

.computed-styles-container {
  flex: 1.2;
  min-width: 260px;
}

.bm-header-title {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Vnořený grafický Box Model */
.box-model-diagram {
  display: flex;
  justify-content: center;
}

.bm-box {
  position: relative;
  border-radius: 4px;
  text-align: center;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
  font-weight: 600;
}

.bm-label {
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 9px;
  text-transform: uppercase;
  font-weight: 800;
  opacity: 0.7;
}

.bm-val {
  position: absolute;
  font-size: 10px;
}

.bm-top { top: 2px; left: 50%; transform: translateX(-50%); }
.bm-bottom { bottom: 2px; left: 50%; transform: translateX(-50%); }
.bm-left { left: 4px; top: 50%; transform: translateY(-50%); }
.bm-right { right: 4px; top: 50%; transform: translateY(-50%); }

.bm-margin {
  background: #ffedd5;
  border: 1px dashed #f97316;
  color: #c2410c;
  padding: 20px 28px;
}

.bm-border {
  background: #fef9c3;
  border: 1px solid #eab308;
  color: #854d0e;
  padding: 18px 24px;
}

.bm-padding {
  background: #dcfce7;
  border: 1px dashed #22c55e;
  color: #15803d;
  padding: 16px 20px;
}

.bm-content {
  background: #bae6fd;
  border: 1px solid #0284c7;
  color: #0369a1;
  padding: 10px 16px;
}

.bm-content-dims {
  font-weight: 800;
  white-space: nowrap;
}

/* Tabulka vypočtených vlastností */
.inspector-props-table {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  font-size: 12px;
}

.props-table-header {
  display: flex;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--bg-secondary);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 11px;
}

.props-table-body {
  max-height: 120px;
  overflow-y: auto;
}

.prop-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.prop-row:last-child {
  border-bottom: none;
}

.prop-name {
  color: #475569;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
}

.prop-val {
  display: flex;
  align-items: center;
  gap: 6px;
}

.prop-val code {
  color: #0284c7;
  font-family: 'Fira Code', monospace;
  font-size: 11px;
}

.color-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, 0.2);
  display: inline-block;
}

/* Virtuální Konzole */
.console-logs {
  flex: 1;
  padding: 8px 12px;
  overflow-y: auto;
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background-color: #f8fbfe;
}

.log-entry {
  display: flex;
  gap: 8px;
  line-height: 1.4;
  word-break: break-word;
}

.log-time { color: var(--text-dim); }
.log-log { color: #1e293b; }
.log-info { color: #0284c7; }
.log-warn { color: #d97706; }
.log-error { color: #dc2626; }
.log-return { color: #16a34a; }

.console-input-bar {
  display: flex;
  align-items: center;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4px 10px;
  gap: 6px;
}

.console-prompt {
  color: var(--accent-orange);
  font-family: 'Fira Code', monospace;
  font-weight: 700;
}

.console-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: 'Fira Code', monospace;
  font-size: 12px;
  outline: none;
}

/* =========================================================================
   Modal CSS Taháku (Cheatsheet)
   ========================================================================= */
.cheatsheet-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.cheatsheet-modal.active {
  display: flex;
}

.cheatsheet-modal-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  max-width: 720px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.25);
}

.cheatsheet-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.cheatsheet-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-main);
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}

.modal-close-btn:hover {
  color: var(--accent-orange);
}

.cheatsheet-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 16px;
  gap: 6px;
}

.cheat-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 10px 14px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.cheat-tab-btn:hover {
  color: var(--text-main);
}

.cheat-tab-btn.active {
  color: var(--accent-orange);
  border-bottom-color: var(--accent-orange);
}

.cheatsheet-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  background-color: #f8fbfe;
}

.cheat-pane {
  display: none;
}

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

.cheat-pane h3 {
  font-size: 14px;
  color: var(--accent-orange-text);
  margin-bottom: 10px;
}

.cheat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cheat-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05);
}

.cheat-card code {
  font-family: 'Fira Code', monospace;
  color: #0284c7;
  font-size: 12px;
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

.cheat-card p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

/* =========================================================================
   Spodní Stavová Lišta / Patička (App Footer & Status Bar)
   ========================================================================= */
.app-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  height: 28px;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  font-size: 11.5px;
  color: var(--text-muted);
  flex-shrink: 0;
  z-index: 40;
  user-select: none;
}

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

.status-item {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.status-divider {
  width: 1px;
  height: 14px;
  background-color: var(--border-color);
}

.status-muted {
  color: var(--text-dim);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #22c55e;
  box-shadow: 0 0 6px rgba(34, 197, 94, 0.6);
  display: inline-block;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.status-dot.compiling {
  background-color: #f59e0b;
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.6);
}

.status-text {
  font-weight: 500;
  color: var(--text-main);
}

.tech-badge {
  font-size: 9.5px;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.badge-html {
  background: var(--accent-orange-subtle);
  color: var(--accent-orange-text);
  border: 1px solid var(--accent-orange-border);
}

.badge-css {
  background: rgba(2, 132, 199, 0.15);
  color: #0284c7;
  border: 1px solid rgba(2, 132, 199, 0.3);
}

.shortcuts-hint {
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 10px;
}

.shortcuts-hint kbd {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: inherit;
  font-size: 10px;
  color: #334155;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}

.copyright-item {
  color: var(--text-muted);
}

.copyright-item strong {
  color: var(--text-main);
  font-weight: 600;
}

.copyright-item .sep {
  color: var(--border-color);
  margin: 0 2px;
}

.volis-link {
  color: var(--accent-orange);
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
  padding: 2px 6px;
  border-radius: 4px;
}

.volis-link:hover {
  color: var(--accent-orange-hover);
  background: var(--accent-orange-subtle);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-globe {
  font-size: 11px;
}

.app-ver-pill {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

@media (max-width: 900px) {
  .shortcuts-hint,
  .version-tag {
    display: none;
  }
}

@media (max-width: 650px) {
  #editor-cursor-pos,
  #lessons-count-status {
    display: none;
  }
  .app-footer {
    padding: 0 8px;
    font-size: 11px;
  }
}