/**
 * Layout System
 * Modern Canva-style layout structure
 */

/* ========== Reset & Base Styles ========== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== Main App Container ========== */
.app-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

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

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-shrink: 0;
}

.header-center {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex: 1;
  justify-content: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-text-primary);
}

.logo img {
  width: 32px;
  height: 32px;
}

.logo h1 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

/* Mode Selector */
.mode-selector {
  min-width: 180px;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-panel);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.mode-selector:hover {
  border-color: var(--color-border-strong);
}

.mode-selector:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}

/* File Actions */
.file-actions {
  display: flex;
  gap: var(--space-sm);
}

/* User Menu */
.user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: background var(--transition-base);
}

.user-menu:hover {
  background: var(--color-bg-hover);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-border);
}

.user-badge {
  padding: 2px var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  background: var(--color-bg-sidebar);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
}

.user-badge.pro {
  background: var(--color-primary-lighter);
  color: var(--color-primary);
}

/* ========== Workspace (Main Content Area) ========== */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - var(--header-height));
}

/* ========== Left Toolbar ========== */
.left-toolbar {
  width: var(--left-toolbar-width);
  background: var(--color-bg-panel);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-md) 0;
  gap: var(--space-sm);
  overflow-y: auto;
  flex-shrink: 0;
  /* Keep width identical across modes: scroll without a visible scrollbar */
  scrollbar-width: none;
}

.left-toolbar::-webkit-scrollbar {
  display: none;
}

.tool-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-xs);
}

.tool-separator {
  width: 32px;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-sm) 0;
}

.toolbar-spacer {
  flex: 1;
}

/* ========== Canvas Area ========== */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--color-bg-canvas);
}

/* Top Toolbar */
.top-toolbar {
  height: var(--top-toolbar-height);
  background: var(--color-bg-panel);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  gap: var(--space-md);
  overflow-x: auto;
  flex-shrink: 0;
}

.toolbar-section {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-right: var(--space-md);
  border-right: 1px solid var(--color-border);
}

.toolbar-section:last-child {
  border-right: none;
}

/* Canvas Container */
.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
}

.canvas-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
}

#patternCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

/* Canvas Overlays */
.canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

/* Status Bar */
.status-bar {
  height: var(--status-bar-height);
  background: var(--color-bg-panel);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  flex-shrink: 0;
}

.status-left,
.status-center,
.status-right {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.status-center {
  flex: 1;
  justify-content: center;
}

/* Zoom Controls */
.zoom-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.zoom-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.zoom-btn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
  border-color: var(--color-border-strong);
}

.zoom-value {
  min-width: 50px;
  text-align: center;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

/* View Options */
.view-options {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.view-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.view-toggle:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-strong);
}

.view-toggle.active {
  background: var(--color-primary-lighter);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ========== Right Panel ========== */
.right-panel {
  width: var(--right-panel-width);
  min-width: var(--right-panel-width);
  max-width: var(--right-panel-width);
  background: var(--color-bg-panel);
  border-left: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  flex-shrink: 0;
  transition: width var(--transition-slower), margin-right var(--transition-slower);
}

.right-panel.collapsed {
  width: 0;
  margin-right: calc(var(--right-panel-width) * -1);
}

/* Panel Toggle Button */
.panel-toggle {
  position: absolute;
  top: 50%;
  right: var(--right-panel-width);
  transform: translateY(-50%);
  width: 24px;
  height: 48px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: var(--z-base);
}

.panel-toggle:hover {
  background: var(--color-bg-hover);
}

.panel-toggle svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-secondary);
}

/* ========== Color Picker ========== */
.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.color-swatch {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.color-swatch:hover {
  border-color: var(--color-border-strong);
  transform: scale(1.05);
}

.color-input {
  width: 80px;
}

/* ========== Validation Status ========== */
.validation-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.validation-status.valid {
  background: var(--color-success-light);
  color: var(--color-success);
}

.validation-status.invalid {
  background: var(--color-error-light);
  color: var(--color-error);
}

.validation-status svg {
  width: 16px;
  height: 16px;
}

/* ========== Responsive Design ========== */
@media (max-width: 1279px) {
  .right-panel {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    z-index: var(--z-dropdown);
    box-shadow: var(--shadow-xl);
  }
}

#fileMenuToggle {
  display: none;
}

@media (max-width: 768px) {
  .app-header {
    padding: 0 var(--space-sm);
    height: 56px;
    gap: var(--space-xs);
  }

  .logo h1 {
    display: none;
  }

  /* File actions live in the burger drawer */
  #fileMenuToggle {
    display: inline-flex;
  }

  #fileMenu {
    position: fixed;
    top: 56px;
    left: 0;
    bottom: 0;
    width: 200px;
    background: var(--color-bg-panel);
    border-right: 1px solid var(--color-border);
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
    padding: var(--space-md);
    transform: translateX(-105%);
    transition: transform 0.2s ease;
    z-index: 950;
  }

  #fileMenu.open {
    transform: translateX(0);
  }

  #fileMenu .btn {
    justify-content: flex-start;
  }

  /* Export becomes icon-only up top */
  .header-right .btn-primary {
    font-size: 0;
    gap: 0;
    padding: var(--space-sm);
  }

  /* Hide the beta pill (inline-styled) and user menu; shrink Upgrade to its star */
  .beta-pill,
  .user-menu {
    display: none !important;
  }

  .btn-upgrade {
    font-size: 0;
    gap: 0;
    padding: var(--space-sm);
  }

  .btn-upgrade span {
    font-size: 16px;
  }

  .mode-selector {
    width: 110px;
    min-width: 0;
    max-width: 110px;
    font-size: var(--font-size-xs);
  }

  .status-bar {
    padding: 0 var(--space-md);
  }
}

/* ========== Panel toggle (all sizes) ========== */
#panelToggle {
  position: fixed;
  right: 12px;
  bottom: 52px;
  z-index: 960;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  padding: 0;
}

.right-panel.collapsed {
  display: none;
}

@media (max-width: 700px) {
  .left-toolbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    width: 100%;
    height: 56px;
    flex-direction: row;
    justify-content: flex-start;
    padding: 0 var(--space-sm);
    gap: var(--space-xs);
    overflow-x: auto;
    overflow-y: hidden;
    border-right: none;
    border-top: 1px solid var(--color-border);
    z-index: 900;
  }

  .left-toolbar .tool-group {
    flex-direction: row;
  }

  .left-toolbar .tool-separator {
    width: 1px;
    height: 32px;
  }

  .canvas-area {
    padding-bottom: 56px;
  }

  .right-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 56px;
    width: min(320px, 85vw);
    max-width: none;
    transform: translateX(100%);
    transition: transform 0.2s ease;
    z-index: 950;
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.2);
  }

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

  #panelToggle {
    bottom: 68px;
  }

  .top-toolbar {
    flex-wrap: wrap;
    row-gap: var(--space-xs);
    height: auto;
    min-height: var(--top-toolbar-height);
    padding-top: var(--space-xs);
    padding-bottom: var(--space-xs);
  }

  #cursorPosition,
  #gridInfo,
  .status-center {
    display: none;
  }
}

/* ========== Print Styles ========== */
@media print {
  .app-header,
  .left-toolbar,
  .top-toolbar,
  .right-panel,
  .status-bar {
    display: none !important;
  }

  .canvas-container {
    overflow: visible;
  }
}

/* ========== Accessibility ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}