/* ============================================
   スタンプメーカー - スタイルシート
   ============================================ */

:root {
  --color-bg: #f0f2f5;
  --color-surface: #ffffff;
  --color-accent: #5C6BC0;
  --color-accent-hover: #4a5ab5;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-border: #e2e5ea;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px;
}

/* Two-column layout */
.main-layout {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.col-left {
  flex: 1;
  min-width: 0;
}

.col-right {
  width: 340px;
  flex-shrink: 0;
  position: sticky;
  top: 16px;
}

/* Header */
.header {
  text-align: center;
  padding: 24px 0 8px;
}

.header-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.header-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* Sections */
.section {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

/* ============================================
   Preview
   ============================================ */
.preview-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.preview-main {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.preview-main canvas {
  width: 160px;
  height: 160px;
  display: block;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

/* Checkerboard for transparency */
.preview-main.transparent {
  background-image:
    linear-gradient(45deg, #d0d0d0 25%, transparent 25%),
    linear-gradient(-45deg, #d0d0d0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #d0d0d0 75%),
    linear-gradient(-45deg, transparent 75%, #d0d0d0 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.preview-sizes {
  display: flex;
  align-items: center;
  gap: 10px;
}

.preview-sizes-label {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.preview-size-items {
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.preview-size-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.preview-size-canvas-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  overflow: hidden;
}

.preview-size-canvas-wrap.transparent {
  background-image:
    linear-gradient(45deg, #d0d0d0 25%, transparent 25%),
    linear-gradient(-45deg, #d0d0d0 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #d0d0d0 75%),
    linear-gradient(-45deg, transparent 75%, #d0d0d0 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
}

.preview-size-canvas-wrap canvas {
  display: block;
}

#small-canvas {
  width: 22px;
  height: 22px;
}

#medium-canvas {
  width: 48px;
  height: 48px;
}

.preview-size-label {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Presets
   ============================================ */
.presets-scroll {
  overflow-x: auto;
  margin: 0 -16px;
  padding: 0 16px;
  -webkit-overflow-scrolling: touch;
}

.presets-scroll::-webkit-scrollbar {
  height: 4px;
}

.presets-scroll::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 2px;
}

.presets-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 4px;
}

.preset-card {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  padding: 5px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: border-color var(--transition), transform var(--transition);
  user-select: none;
}

.preset-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-1px);
}

.preset-card.active {
  border-color: var(--color-accent);
}

.preset-card canvas {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  display: block;
}

.preset-card-name {
  font-size: 0.65rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* ============================================
   Controls
   ============================================ */
.control-group {
  margin-bottom: 14px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-group-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.control-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.control-group-row .control-label {
  margin-bottom: 0;
}

/* 背景色・文字色 横並び */
.color-row {
  display: flex;
  gap: 14px;
  margin-bottom: 14px;
}

.color-half {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

/* 形状・透過・出力サイズ 横並び */
.options-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.options-item {
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

.options-item.control-group-row {
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

/* Text Input */
.text-input {
  width: 100%;
  padding: 8px 12px;
  font-size: 1.05rem;
  font-family: 'Noto Sans JP', sans-serif;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition);
  text-align: center;
  letter-spacing: 0.1em;
}

.text-input:focus {
  border-color: var(--color-accent);
}

/* Font Selector */
.font-trigger {
  width: 100%;
  padding: 8px 12px;
  font-size: 0.9rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: border-color var(--transition);
  text-align: left;
}

.font-trigger:hover,
.font-trigger.open {
  border-color: var(--color-accent);
}

.font-trigger-arrow {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  transition: transform var(--transition);
}

.font-trigger.open .font-trigger-arrow {
  transform: rotate(180deg);
}

.font-panel {
  display: none;
  margin-top: 6px;
  max-height: 240px;
  overflow-y: auto;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.font-panel.open {
  display: block;
}

.font-section.hidden {
  display: none;
}

.font-section {
  padding: 4px 0;
}

.font-section-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 6px 14px 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.font-item {
  padding: 8px 14px;
  cursor: pointer;
  transition: background var(--transition);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.font-item:hover {
  background: #f3f4f6;
}

.font-item.active {
  background: #eef0ff;
  color: var(--color-accent);
  font-weight: 600;
}

.font-item-check {
  font-size: 0.85rem;
  opacity: 0;
}

.font-item.active .font-item-check {
  opacity: 1;
}

/* Button Groups */
.button-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.btn-option {
  flex: 1;
  min-width: 0;
  padding: 6px 8px;
  font-size: 0.78rem;
  font-family: 'Noto Sans JP', sans-serif;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--color-text);
  text-align: center;
}

.btn-option:hover {
  border-color: var(--color-accent);
}

.btn-option.active {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: #ffffff;
}

/* Color Controls */
.color-control {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.color-picker {
  width: 44px;
  height: 36px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 2px;
  background: var(--color-surface);
}

.color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

.color-hex {
  font-size: 0.82rem;
  font-family: 'Roboto Mono', monospace;
  color: var(--color-text-secondary);
}

.color-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition);
  position: relative;
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-accent);
}

/* White swatch needs a border to be visible */
.color-swatch.swatch-light {
  border-color: #ddd;
}

.color-swatch.swatch-light.active {
  border-color: var(--color-accent);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: 0.3s;
  border-radius: 26px;
}

.toggle-slider::before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

input:checked + .toggle-slider {
  background-color: var(--color-accent);
}

input:checked + .toggle-slider::before {
  transform: translateX(22px);
}

/* ============================================
   Download
   ============================================ */
.download-section {
  text-align: center;
}

.btn-download {
  width: 100%;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #ffffff;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-download:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-download:active {
  transform: translateY(0);
}

.download-hint {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

.download-hint.warning {
  color: #e53e3e;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  text-align: center;
  padding: 16px 0 24px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Responsive
   ============================================ */

/* モバイル: 1カラム、右列が先に表示 */
@media (max-width: 767px) {
  .main-layout {
    flex-direction: column-reverse;
  }

  .col-right {
    width: 100%;
    position: static;
  }

  .presets-container {
    flex-wrap: nowrap;
  }
}

/* タブレット以上: 2カラム */
@media (min-width: 768px) {
  .container {
    padding: 24px;
  }

  .header {
    padding: 32px 0 12px;
  }

  .header-title {
    font-size: 1.8rem;
  }

  .section {
    padding: 18px 22px;
  }

  .preview-main {
    width: 180px;
    height: 180px;
  }

  .preview-main canvas {
    width: 180px;
    height: 180px;
  }
}

/* 大画面 */
@media (min-width: 1024px) {
  .container {
    max-width: 1040px;
  }

  .col-right {
    width: 360px;
  }

  .preview-main {
    width: 220px;
    height: 220px;
  }

  .preview-main canvas {
    width: 220px;
    height: 220px;
  }
}