/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root {
  --bg-primary: #0a0a0c;
  --bg-secondary: #121216;
  --bg-panel: rgba(22, 22, 28, 0.75);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(255, 255, 255, 0.15);
  --accent-color: #3b82f6;
  --accent-color-rgb: 59, 130, 246;
  --accent-hover: #2563eb;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.7), 0 8px 10px -6px rgba(0, 0, 0, 0.7);
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  height: 60px;
  background-color: rgba(10, 10, 12, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 10;
}

.logo {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo svg {
  stroke: #3b82f6;
  width: 24px;
  height: 24px;
}

/* Header History Controls */
.history-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.header-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-color-hover);
  color: var(--text-primary);
}

.header-btn:active:not(:disabled) {
  background: rgba(var(--accent-color-rgb), 0.15);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.header-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
  border-color: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
}

.header-btn svg {
  width: 16px;
  height: 16px;
  stroke-width: 2.5;
}

.shortcuts-info {
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  pointer-events: none;
}

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

/* Sidebar Tool Panel */
.sidebar {
  width: 76px;
  background-color: var(--bg-panel);
  backdrop-filter: blur(20px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0;
  gap: 12px;
  z-index: 5;
  box-shadow: var(--shadow-lg);
}

.tool-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

.tool-btn.active {
  background: rgba(var(--accent-color-rgb), 0.15);
  color: var(--accent-color);
  border-color: var(--accent-color);
  box-shadow: 0 0 12px rgba(var(--accent-color-rgb), 0.2);
}

.tool-btn svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.tool-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 84px;
  background: #1e1e24;
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-5px);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  pointer-events: none;
  z-index: 100;
}

.tool-btn:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.divider {
  width: 32px;
  height: 1px;
  background: var(--border-color);
  margin: 8px 0;
}

/* Workspace Area */
.workspace {
  flex: 1;
  background-color: var(--bg-primary);
  display: block; /* Flex のはみ出しによる上部・左部のスクロール不可バグを防ぐため block に変更 */
  padding: 40px;
  overflow: auto;
  position: relative;
}

.canvas-container {
  position: relative;
  margin: auto; /* display: block 親要素の中で、小さい時は中央配置、大きい時は左上起点で全領域スクロール可能にする魔法の記述 */
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  background-image: linear-gradient(45deg, #18181b 25%, transparent 25%),
                    linear-gradient(-45deg, #18181b 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, #18181b 75%),
                    linear-gradient(-45deg, transparent 75%, #18181b 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: #0e0e11;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

canvas {
  display: block;
  cursor: crosshair;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* Properties Panel */
.properties-panel {
  width: 280px;
  background-color: var(--bg-panel);
  backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 24px;
  gap: 24px;
  z-index: 5;
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

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

.touch-brush-cursor {
  display: none;
}

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel-title {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
}

.setting-value {
  color: var(--text-primary);
  font-weight: 600;
}

/* Range Inputs */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  background: var(--accent-color);
  cursor: pointer;
  transition: transform var(--transition-fast);
  box-shadow: 0 0 8px rgba(var(--accent-color-rgb), 0.5);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Color Palette */
.color-picker-wrapper {
  display: flex;
  gap: 10px;
  align-items: center;
}

.color-input-container {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.color-input-container input[type="color"] {
  position: absolute;
  top: -10px;
  left: -10px;
  width: 60px;
  height: 60px;
  border: none;
  cursor: pointer;
  background: none;
}

.preset-colors {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  flex: 1;
}

.preset-color-btn {
  aspect-ratio: 1;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.preset-color-btn:hover {
  transform: scale(1.1);
  border-color: var(--text-secondary);
}

.preset-color-btn.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 3px var(--accent-color);
}

/* Shape selectors */
.shape-selectors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.shape-btn {
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.shape-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--border-color-hover);
  color: var(--text-primary);
}

.shape-btn.active {
  background: rgba(var(--accent-color-rgb), 0.1);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.shape-btn svg {
  width: 18px;
  height: 18px;
}

/* Drop Area UI */
.import-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 10, 12, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 8;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  border: 2px dashed rgba(var(--accent-color-rgb), 0.4);
  margin: 30px;
  border-radius: var(--radius-lg);
}

.import-overlay.drag-over {
  opacity: 1;
  pointer-events: auto;
}

.import-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  transform: translateY(20px);
  transition: transform var(--transition-normal);
}

.import-overlay.drag-over .import-content {
  transform: translateY(0);
}

.import-icon {
  width: 64px;
  height: 64px;
  background: rgba(var(--accent-color-rgb), 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.import-icon svg {
  width: 32px;
  height: 32px;
}

.import-title {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 600;
}

.import-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 280px;
  line-height: 1.5;
}

/* Empty Canvas Welcome Screen */
.welcome-screen {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  max-width: 420px;
  text-align: center;
  z-index: 2;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  backdrop-filter: blur(20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.welcome-screen.hidden {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.95);
  pointer-events: none;
}

.welcome-logo {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.15), rgba(59, 130, 246, 0.15));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-color);
  border: 1px solid rgba(var(--accent-color-rgb), 0.2);
  margin-bottom: 8px;
}

.welcome-logo svg {
  width: 40px;
  height: 40px;
}

.welcome-title {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.welcome-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.primary-btn {
  background: var(--accent-color);
  color: white;
  border: none;
  height: 46px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px rgba(var(--accent-color-rgb), 0.25);
}

.primary-btn:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 16px rgba(var(--accent-color-rgb), 0.35);
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  height: 46px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.secondary-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-color-hover);
}

.btn-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 2.5;
}

/* Selection rectangle style for mosaic selection tool */
.selection-box {
  position: absolute;
  border: 2px dashed var(--accent-color);
  background: rgba(var(--accent-color-rgb), 0.1);
  pointer-events: none;
  display: none;
  z-index: 6;
  box-shadow: 0 0 8px rgba(var(--accent-color-rgb), 0.2);
}

/* Footer & Status Bar */
footer {
  height: 30px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  font-size: 11px;
  color: var(--text-muted);
  z-index: 10;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Toast Notification */
.toast {
  position: absolute;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(18, 18, 22, 0.9);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-xl);
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast svg {
  stroke: #10b981;
  width: 16px;
  height: 16px;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Canvas Text Input Element styling */
.canvas-text-input {
  position: absolute;
  background: rgba(18, 18, 22, 0.95);
  color: var(--text-primary);
  border: 1px solid var(--accent-color);
  outline: none;
  font-family: inherit;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

/* Select Input Styling */
.preset-select {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  outline: none;
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 32px;
}

.preset-select:hover {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: var(--border-color-hover);
}

.preset-select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(var(--accent-color-rgb), 0.2);
}

.preset-select option {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* Modal Overlay (for License Popups) */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 10000;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  display: flex;
  flex-direction: column;
  max-height: 80vh;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.show .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-primary);
}

.license-block {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 12px;
  border-radius: 6px;
  margin-top: 8px;
}

.license-block p {
  margin: 0 0 4px 0;
}

.license-block pre {
  font-family: monospace;
  font-size: 11px;
  white-space: pre-wrap;
  margin: 8px 0 0 0;
  color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.2);
  padding: 8px;
  border-radius: 4px;
  max-height: 120px;
  overflow-y: auto;
}

/* Smartphone Responsive Design */
@media (max-width: 768px) {
  .main-container {
    flex-direction: column;
  }

  /* ツールバーを下に横並びで配置 */
  .sidebar {
    width: 100%;
    height: auto;
    flex-direction: row;
    padding: 8px 16px;
    gap: 8px;
    justify-content: space-around;
    border-right: none;
    border-top: 1px solid var(--border-color);
    order: 2; /* ワークスペースの下にする */
  }

  .tool-btn {
    width: 42px;
    height: 42px;
    border-radius: 8px;
  }

  .tool-btn::after {
    display: none; /* スマホではツールチップ（ホバー）を非表示 */
  }

  .divider {
    width: 1px;
    height: 24px;
    margin: 0 4px;
  }

  /* ワークスペースのサイズ調整 */
  .workspace {
    flex: 1;
    padding: 10px;
    order: 1;
  }

  /* 設定パネルを上に配置（スマホ版） */
  .properties-panel {
    width: 100%;
    height: auto;
    border-left: none;
    border-bottom: 1px solid var(--border-color);
    padding: 0; /* トグルヘッダーのためにパディングを一旦0に */
    gap: 0;
    flex-direction: column; /* 縦並びにする */
    order: 0; /* ワークスペースの上に置く */
    background-color: var(--bg-panel);
    overflow-y: visible;
  }

  .mobile-panel-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid transparent;
    cursor: pointer;
    user-select: none;
    transition: background-color var(--transition-fast);
  }

  .mobile-panel-toggle:active {
    background-color: rgba(255, 255, 255, 0.06);
  }

  .mobile-panel-toggle .toggle-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .mobile-panel-toggle .toggle-arrow {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-normal);
  }

  /* 展開時のスタイル変化 */
  .properties-panel.open .mobile-panel-toggle {
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.04);
  }

  .properties-panel.open .toggle-arrow {
    transform: rotate(180deg);
  }

  /* 設定コンテンツの折りたたみ制御（デフォルト非表示、オープン時にスライド展開） */
  .properties-content {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease-out, padding 0.25s ease-out;
    padding: 0 16px;
  }

  .properties-panel.open .properties-content {
    max-height: 500px; /* 十分な高さ */
    padding: 16px;
    overflow-y: auto;
  }

  .panel-section {
    flex: 1;
    min-width: 130px;
    gap: 8px;
    padding-bottom: 12px;
  }

  .setting-group {
    margin-top: 8px !important;
  }

  /* ヘッダーの調整 */
  header {
    height: 50px;
    padding: 0 12px;
  }

  .logo {
    font-size: 16px;
  }

  .zoom-controls {
    gap: 4px;
  }

  #zoom-val {
    min-width: 36px;
    font-size: 12px;
  }

  .header-btn {
    padding: 4px 8px;
    font-size: 12px;
  }

  .shortcuts-info {
    display: none; /* スマホではショートカット案内を隠す */
  }

  .touch-brush-cursor {
    position: fixed;
    pointer-events: none;
    border: 2px solid #ffffff;
    box-shadow: 0 0 0 1px #000000, 0 0 8px rgba(0, 0, 0, 0.8), inset 0 0 6px rgba(0, 0, 0, 0.4);
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    display: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
  }
}