:root {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --border: rgba(15, 23, 42, 0.1);
  --text: #0f172a;
  --muted: #64748b;
  --accent: #b48600;
  --accent-2: #2563eb;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
  --canvas-bg: #ffffff;
  --canvas-grid: rgba(100, 116, 139, 0.2);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
}

body.theme-dark {
  --bg: #0f1419;
  --panel: #1a2332;
  --panel-2: #243044;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8edf5;
  --muted: #94a3b8;
  --accent: #d6b36a;
  --accent-2: #60a5fa;
  --danger: #f87171;
  --success: #4ade80;
  --warning: #fbbf24;
  --canvas-bg: #0b1017;
  --canvas-grid: rgba(148, 163, 184, 0.15);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: "Tajawal", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden {
  display: none !important;
}

#wizard-screen,
#editor-screen {
  min-height: 100vh;
}

/* Wizard */
.wizard-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.wizard-header h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  color: var(--accent);
}

.wizard-header p {
  margin: 0 0 24px;
  color: var(--muted);
}

.wizard-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.wizard-card h2 {
  margin: 0 0 16px;
  font-size: 1.15rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(214, 179, 106, 0.35);
  border-color: var(--accent);
}

.checkbox-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}

.checkbox-row label {
  flex-direction: row;
  align-items: center;
  color: var(--text);
}

.checkbox-row input {
  width: auto;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, #d6b36a, #b48600);
  color: #111;
}

.btn-secondary {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-danger {
  background: rgba(248, 113, 113, 0.15);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.35);
}

.wizard-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-start;
  margin-top: 8px;
}

.hint {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 8px;
}

/* Editor layout */
#editor-screen {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  height: 100vh;
  overflow: hidden;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.topbar .project-title {
  font-weight: 700;
  color: var(--accent);
}

.topbar .save-status {
  font-size: 0.85rem;
  color: var(--muted);
}

.topbar .save-status.saved {
  color: var(--success);
}

.topbar .save-status.error {
  color: var(--danger);
}

.floor-tabs {
  display: flex;
  gap: 8px;
  padding: 8px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.floor-tab {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  font: inherit;
}

.floor-tab.active {
  background: rgba(214, 179, 106, 0.15);
  border-color: rgba(214, 179, 106, 0.45);
  color: var(--accent);
}

.editor-main {
  display: grid;
  grid-template-columns: 280px 1fr 300px;
  min-height: 0;
  overflow: hidden;
}

.sidebar {
  background: var(--panel);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px;
}

.sidebar-right {
  border-left: none;
  border-right: 1px solid var(--border);
}

.sidebar h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--accent);
}

.tool-section {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.tool-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.tool-item {
  padding: 8px;
  border-radius: 8px;
  border: 1px dashed var(--border);
  background: var(--panel-2);
  cursor: grab;
  font-size: 0.82rem;
  text-align: center;
  user-select: none;
}

.tool-item:active {
  cursor: grabbing;
}

.tool-item small {
  display: block;
  color: var(--muted);
  margin-top: 4px;
}

.canvas-wrap {
  position: relative;
  background: var(--canvas-bg);
  min-width: 0;
}

#konva-container {
  width: 100%;
  height: 100%;
  background: var(--canvas-bg);
}

.canvas-toolbar {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  gap: 8px;
  z-index: 5;
}

.canvas-toolbar .btn {
  padding: 8px 10px;
  font-size: 0.85rem;
}

.compass {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.compass-arrow {
  font-size: 1.4rem;
  transform-origin: center;
}

.stats-panel .stat-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.stats-panel .stat-row strong {
  color: var(--accent);
}

.warning-box {
  margin-top: 12px;
  padding: 10px;
  border-radius: 8px;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.35);
  color: var(--warning);
  font-size: 0.85rem;
}

.props-panel {
  margin-bottom: 16px;
  padding: 12px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}

.props-panel h3 {
  margin: 0 0 10px;
}

.props-panel .form-grid-2 {
  margin-bottom: 10px;
}

.props-panel .dim-preview {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 8px 0;
}

.display-options label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--text);
}

.display-options input {
  width: auto;
}

.room-dim {
  font-size: 0.78rem;
  color: var(--muted);
  display: block;
}

.layer-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.88rem;
}

.layer-toggle input {
  width: auto;
}

.bottom-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  background: var(--panel);
  border-top: 1px solid var(--border);
}

.scale-label {
  margin-right: auto;
  color: var(--muted);
  font-size: 0.85rem;
}

.custom-form {
  display: grid;
  gap: 8px;
}

.link-box {
  margin-top: 16px;
  padding: 12px;
  border-radius: 8px;
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.25);
  word-break: break-all;
  font-size: 0.9rem;
}

/* Topbar layout */
.topbar-primary {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.topbar .project-title {
  margin-left: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.topbar-share {
  width: 100%;
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-short {
  display: none;
}

.mobile-only {
  display: none !important;
}

.mobile-nav {
  display: none;
}

.mobile-more-menu {
  display: none;
  width: 100%;
  padding: 8px 14px 12px;
  gap: 8px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

@media (min-width: 769px) {
  .topbar {
    flex-direction: row;
    align-items: center;
  }

  .topbar-primary {
    margin-right: auto;
  }

  .topbar-share {
    width: auto;
    flex-basis: 100%;
  }
}

.mobile-panel-header {
  display: none;
}

/* Tablet */
@media (max-width: 1100px) {
  .editor-main {
    grid-template-columns: 240px 1fr;
  }

  .sidebar-right {
    display: none;
  }
}

/* Mobile */
@media (max-width: 768px) {
  html, body {
    overscroll-behavior: none;
  }

  .mobile-only {
    display: inline-flex !important;
  }

  .wizard-wrap {
    padding: 20px 14px 32px;
    padding-bottom: max(32px, env(safe-area-inset-bottom));
  }

  .wizard-header h1 {
    font-size: 1.5rem;
  }

  .wizard-header p {
    font-size: 0.92rem;
    line-height: 1.5;
  }

  .wizard-card {
    padding: 16px;
    margin-bottom: 14px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-grid-2 {
    grid-template-columns: 1fr;
  }

  input, select, textarea {
    font-size: 16px;
    min-height: 44px;
    padding: 12px;
  }

  .wizard-actions {
    flex-direction: column;
  }

  .wizard-actions .btn {
    width: 100%;
    min-height: 48px;
    justify-content: center;
  }

  #editor-screen {
    height: 100dvh;
    padding-bottom: env(safe-area-inset-bottom);
  }

  .topbar {
    padding: 8px 10px;
    gap: 6px;
    flex-wrap: nowrap;
    align-items: stretch;
    flex-direction: column;
  }

  .topbar-actions {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
  }

  .topbar-actions::-webkit-scrollbar {
    display: none;
  }

  .topbar-actions .btn {
    flex-shrink: 0;
    min-width: 44px;
    min-height: 44px;
    padding: 10px 12px;
  }

  .topbar-extra {
    display: none !important;
  }

  .btn-long {
    display: none;
  }

  .btn-short {
    display: inline;
    font-size: 1.1rem;
  }

  .topbar-share {
    display: none;
  }

  .floor-tabs {
    padding: 6px 10px;
    gap: 6px;
  }

  .floor-tab {
    padding: 10px 14px;
    min-height: 40px;
    font-size: 0.88rem;
  }

  .editor-main {
    display: block;
    position: relative;
    min-height: 0;
    height: 100%;
    overflow: hidden;
  }

  .mobile-panel {
    display: none;
    position: absolute;
    inset: 0;
    z-index: 2;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .mobile-panel.active {
    display: block;
  }

  .sidebar,
  .sidebar-right {
    display: none;
    border: none;
    max-height: none;
    padding: 12px 14px 80px;
    background: var(--panel);
  }

  .sidebar.active,
  .sidebar-right.active {
    display: block;
  }

  .mobile-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 3;
    background: var(--panel);
    padding: 4px 0 12px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--border);
  }

  .mobile-panel-header h2 {
    margin: 0;
    font-size: 1rem;
    color: var(--accent);
  }

  .mobile-panel-close {
    min-width: 44px;
    min-height: 44px;
    border: none;
    background: var(--panel-2);
    border-radius: 10px;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text);
  }

  .canvas-wrap {
    min-height: 0;
    height: 100%;
    touch-action: none;
  }

  .canvas-wrap.active {
    display: block;
    z-index: 1;
  }

  .canvas-toolbar {
    top: auto;
    bottom: 12px;
    left: 12px;
    right: auto;
    flex-direction: column;
    gap: 6px;
  }

  .canvas-toolbar .btn {
    min-width: 44px;
    min-height: 44px;
    font-size: 1rem;
    box-shadow: var(--shadow);
  }

  .compass {
    width: 52px;
    height: 52px;
    top: 8px;
    right: 8px;
  }

  .compass-arrow {
    font-size: 1.1rem;
  }

  .tool-items {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .tool-item {
    padding: 10px 6px;
    min-height: 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
  }

  .tool-item small {
    font-size: 0.7rem;
  }

  .bottom-bar {
    display: none;
  }

  .mobile-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--panel);
    border-top: 1px solid var(--border);
    padding: 6px 8px;
    padding-bottom: max(6px, env(safe-area-inset-bottom));
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
  }

  body.theme-dark .mobile-nav {
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.35);
  }

  .mobile-nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 52px;
    border: none;
    background: transparent;
    color: var(--muted);
    font: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
  }

  .mobile-nav-btn.active {
    color: var(--accent);
    background: rgba(214, 179, 106, 0.12);
  }

  .mobile-nav-icon {
    font-size: 1.25rem;
    line-height: 1;
  }

  .props-panel {
    padding: 14px;
  }

  .display-options label {
    min-height: 44px;
  }

  .stat-row {
    padding: 10px 0;
    font-size: 0.9rem;
  }

  .btn:hover {
    transform: none;
  }
}

@media (max-width: 380px) {
  .tool-items {
    grid-template-columns: repeat(2, 1fr);
  }

  .mobile-more-menu:not(.hidden) {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-more-menu:not(.hidden) {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}