:root {
  --bg-main: #0B0E14;
  --bg-panel: #151A23;
  --bg-header: #1B222E;
  --bg-hover: #232D3B;
  --border-color: #2D3748;

  --text-main: #E2E8F0;
  --text-muted: #A0AEC0;

  --accent-blue: #3B82F6;
  --accent-blue-hover: #2563EB;
  --accent-danger: #EF4444;

  --font-family: 'Inter', sans-serif;

  --pane-header-h: 40px;
  --header-h: 60px;
}

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

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

/* Typography & Helpers */
.w-100 {
  width: 100%;
}

.mt-10 {
  margin-top: 10px;
}

.mt-auto {
  margin-top: auto;
}

.mb-10 {
  margin-bottom: 10px;
}

/* Header */
.app-header {
  min-height: var(--header-h);
  height: auto;
  background-color: var(--bg-header);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 10px;
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: 10px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #3B82F6, #8B5CF6);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 18px;
}

.logo-text h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

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

.top-center-tools {
  display: flex;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

.tool-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-family);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.tool-btn.active {
  background: var(--bg-hover);
  color: var(--accent-blue);
  font-weight: 500;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Pricing Badge */
.pricing-badge {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: #10B981;
  padding: 6px 10px;
  border-radius: 6px;
  font-weight: 600;
  font-family: 'Space Grotesk', monospace, sans-serif;
  letter-spacing: 0.02em;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-danger {
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.2s;
}

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

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

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

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

.btn-danger {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
}

/* Main App Body */
.app-body {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--header-h));
  min-height: 0;
}

/* Sidebar */
.left-sidebar {
  width: 280px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.panel-header {
  padding: 12px 16px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-header);
}

.panel-content {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.empty-state {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  padding: 20px 0;
}

.prop-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.prop-group label {
  font-size: 12px;
  color: var(--text-muted);
}

.input-with-unit {
  display: flex;
  align-items: center;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.input-with-unit input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 8px 10px;
  font-size: 13px;
  outline: none;
  width: 100%;
}

.input-with-unit .curr-unit {
  padding: 8px 10px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-hover);
  border-left: 1px solid var(--border-color);
}

.styled-select {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 8px;
  font-size: 12px;
  border-radius: 6px;
  outline: none;
  cursor: pointer;
}

input[type="color"] {
  border: none;
  background: none;
  width: 100%;
  height: 36px;
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.divider {
  border: 0;
  height: 1px;
  background: var(--border-color);
  margin: 10px 0;
}

/* Split View */
.split-view {
  display: flex;
  flex: 1;
  position: relative;
  background: var(--bg-main);
}

.split-pane {
  display: flex;
  flex-direction: column;
  min-width: 20%;
}

.pane-2d {
  flex: 1;
}

.pane-3d {
  flex: 1;
  border-left: 1px solid var(--border-color);
}

.splitter {
  width: 4px;
  background: var(--border-color);
  cursor: col-resize;
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  z-index: 10;
  margin-left: -2px;
  transition: background 0.2s;
}

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

.pane-header {
  height: var(--pane-header-h);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.pane-title {
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pane-actions {
  display: flex;
  gap: 4px;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

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

.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: #10141d;
}

/* 2D Grid Background */
.pane-2d .canvas-container {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  cursor: crosshair;
}

canvas {
  display: block;
}

/* Language Toggles */
.lang-toggle {
  display: flex;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

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

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  width: 400px;
  max-width: 90%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

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

.modal-header h3 {
  font-size: 16px;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
}

.modal-body {
  padding: 20px;
}