/* ==========================================================================
   PlanStudio v3.0 - Modern Clean Architectural Styling
   ========================================================================== */

:root {
  --bg-app: #0f172a;
  --bg-panel: #1e293b;
  --bg-panel-sub: #283548;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #3b82f6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;

  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-green: #10b981;
  --accent-green-hover: #059669;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;

  --canvas-bg: #f8fafc;
  --canvas-grid-subtle: #e2e8f0;
  --canvas-grid-main: #cbd5e1;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

html {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  zoom: 0.80;
  width: calc(100vw / 0.80);
  height: calc(100vh / 0.80);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  margin: 0;
  padding: 0;
}

/* Header */
.app-header {
  height: 54px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-icon {
  font-size: 24px;
  background: var(--bg-panel-sub);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.2;
  white-space: nowrap;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.header-project-name {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  flex-shrink: 0;
  padding: 4px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: border-color 0.2s;
}

.header-project-name:focus-within {
  border-color: #3b82f6;
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.project-name-icon {
  font-size: 14px;
}

.project-name-input {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  outline: none;
  width: 170px;
}

.project-name-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.header-presets {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.preset-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
}

.select-input {
  background: transparent;
  color: #fff;
  border: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  padding: 4px;
}

.select-input option {
  background: var(--bg-panel);
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.divider-v {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 4px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-blue-hover);
}

.btn-secondary {
  background: var(--bg-panel-sub);
  color: var(--text-main);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: #334155;
  color: #fff;
}

.btn-success {
  background: var(--accent-green);
  color: #fff;
}
.btn-success:hover {
  background: var(--accent-green-hover);
}

.btn-outline {
  background: transparent;
  color: var(--text-sub);
  border-color: var(--border-color);
}
.btn-outline:hover {
  background: var(--bg-panel-sub);
  color: #fff;
}

.btn-icon-only {
  background: var(--bg-panel-sub);
  color: #fff;
  border-color: var(--border-color);
  padding: 7px 10px;
  font-size: 14px;
}
.btn-icon-only:hover {
  background: #334155;
}

.btn-small {
  padding: 5px 8px;
  font-size: 11.5px;
}

.btn-danger-outline {
  background: transparent;
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  width: 100%;
  justify-content: center;
  margin-top: 6px;
}
.btn-danger-outline:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
}

/* App Body Layout */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* Left Sidebar */
.sidebar-tools {
  width: 240px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px;
  overflow-y: auto;
  flex-shrink: 0;
  z-index: 10;
}

.tool-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Mode Toggles */
.mode-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
}

.mode-btn:hover {
  background: var(--bg-panel-sub);
  border-color: #475569;
}

.mode-btn.active {
  background: rgba(37, 99, 235, 0.15);
  border-color: var(--accent-blue);
  color: #fff;
}

.mode-badge {
  font-size: 9.5px;
  text-transform: uppercase;
  font-weight: 700;
  background: #334155;
  color: #93c5fd;
  padding: 1px 6px;
  border-radius: 3px;
  margin-bottom: 4px;
}

.mode-btn.active .mode-badge {
  background: var(--accent-blue);
  color: #fff;
}

.mode-btn strong {
  font-size: 12.5px;
  line-height: 1.2;
}

.mode-btn small {
  font-size: 10.5px;
  color: var(--text-muted);
}

/* Tools Grid */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.15s;
}

.tool-btn:hover {
  background: var(--bg-panel-sub);
  color: #fff;
}

.tool-btn.active {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

.t-icon {
  font-size: 15px;
}

/* Sub-Options Panel */
.tool-suboptions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-input);
  padding: 10px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.subopt-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.subopt-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.subopt-buttons {
  display: flex;
  gap: 4px;
}

.subopt-btn {
  flex: 1;
  padding: 5px;
  font-size: 11px;
  background: var(--bg-panel-sub);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  border-radius: 4px;
  cursor: pointer;
}
.subopt-btn.active {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
}

/* Snapping controls */
.snapping-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-sub);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent-blue);
  cursor: pointer;
}

.grid-size-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: 20px;
}

.small-label {
  font-size: 11px;
  color: var(--text-muted);
}

.select-mini {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 11px;
}

kbd {
  background: #334155;
  color: #f1f5f9;
  padding: 1px 4px;
  border-radius: 3px;
  font-family: inherit;
  font-size: 9.5px;
}

.btn-group-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

/* Canvas Container */
.canvas-container {
  flex: 1;
  position: relative;
  background: #e2e8f0;
  overflow: hidden;
  cursor: crosshair;
}

canvas#planCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.canvas-floating-controls {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  padding: 5px 8px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  z-index: 5;
}

.float-btn {
  background: transparent;
  color: #fff;
  border: none;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 4px;
  font-size: 12px;
}
.float-btn:hover {
  background: #334155;
}

.zoom-text {
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  color: #93c5fd;
  min-width: 40px;
  text-align: center;
}

.canvas-status-banner {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-sub);
  z-index: 5;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  pointer-events: none;
}

.canvas-status-banner strong {
  color: #60a5fa;
}

.scale-bar-badge {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(4px);
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  color: #0f172a;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  z-index: 5;
  pointer-events: none;
}

.scale-ruler {
  display: flex;
  flex-direction: column;
  width: 100px;
}

.ruler-line {
  height: 4px;
  border-left: 2px solid #0f172a;
  border-right: 2px solid #0f172a;
  border-bottom: 2px solid #0f172a;
  width: 100%;
}

.ruler-labels {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  margin-top: 1px;
}

.scale-text {
  font-size: 9.5px;
  color: #64748b;
  font-weight: 500;
}

/* Right Sidebar (Inspector) */
.sidebar-inspector {
  width: 250px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.2s ease;
  z-index: 10;
}

.sidebar-inspector.collapsed {
  display: none;
}

.inspector-header {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-color);
}

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 4px;
}
.btn-close:hover {
  color: #fff;
}

.inspector-body {
  padding: 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.empty-selection-note {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  padding: 24px 12px;
  color: var(--text-muted);
}

.empty-selection-note .note-icon {
  font-size: 28px;
}

.small-text {
  font-size: 11.5px;
  line-height: 1.4;
}

.prop-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.prop-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.prop-input {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: #fff;
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 12px;
  outline: none;
}
.prop-input:focus {
  border-color: var(--accent-blue);
}

/* Footer / Status Bar */
.app-footer {
  height: 28px;
  background: #090d16;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 11px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  flex-shrink: 0;
  z-index: 20;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-separator {
  color: #334155;
}

.autosave-badge {
  color: #34d399;
  font-size: 10.5px;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

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

.modal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 100%;
  max-width: 640px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

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

.btn-close-modal {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
}
.btn-close-modal:hover {
  color: #fff;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-sub);
}

.help-section h4 {
  color: #60a5fa;
  margin-bottom: 6px;
  font-size: 14px;
}

.help-section ul {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.shortcut-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--bg-input);
  padding: 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-footer-credit {
  font-size: 12px;
  color: var(--text-muted);
}

.dev-link {
  color: #60a5fa;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s, text-decoration 0.15s;
}

.dev-link:hover {
  color: #93c5fd;
  text-decoration: underline;
}