:root {
  --bg-0: #f6f5fb;
  --bg-1: #fdfcff;
  --bg-2: #edecf4;
  --fg: #1e1e32;
  --fg2: #65657a;
  --accent: #7c3aed;
  --accent-h: #6d28d9;
  --accent-soft: rgba(124, 58, 237, 0.08);
  --accent-glow: rgba(124, 58, 237, 0.1);
  --secondary: #d63384;
  --secondary-soft: rgba(232, 67, 147, 0.08);
  --surface-warm: #faf8ff;
  --border: #d8d6e6;
  --border-accent: rgba(124, 58, 237, 0.2);
  --r: 10px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg-0: #111120;
  --bg-1: #1c1c32;
  --bg-2: #28283e;
  --fg: #e4e4f0;
  --fg2: #9898b0;
  --accent: #8b5cf6;
  --accent-h: #7c3aed;
  --accent-soft: rgba(139, 92, 246, 0.12);
  --accent-glow: rgba(139, 92, 246, 0.14);
  --secondary: #e57399;
  --secondary-soft: rgba(240, 98, 146, 0.1);
  --surface-warm: #1e1e35;
  --border: #38385a;
  --border-accent: rgba(139, 92, 246, 0.25);
}

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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg-0);
  color: var(--fg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

header {
  text-align: center;
  padding: var(--space-xl) var(--space-md) var(--space-lg);
  background: var(--surface-warm);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

header::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--secondary), var(--accent));
  opacity: 0.4;
}

.header-actions {
  position: absolute; top: var(--space-md); right: var(--space-md);
  display: flex; gap: var(--space-sm);
}

.header-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--bg-2);
  color: var(--fg); cursor: pointer; font-size: 0.85rem;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s ease-out, background 0.2s ease-out, color 0.2s ease-out;
  font-family: inherit; font-weight: 700;
}

.header-btn:hover { border-color: var(--accent); color: var(--accent); }
.header-btn:active { transform: scale(0.92); }

header h1 {
  font-size: clamp(1.5rem, 4vw, 2.1rem); font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.04em;
}

header p { color: var(--fg2); margin-top: var(--space-xs); font-size: 0.9rem; }

.size-badge {
  display: inline-block; margin-left: var(--space-sm);
  font-size: 0.7rem; padding: 2px 8px;
  background: var(--accent-soft); border: 1px solid var(--border-accent);
  border-radius: 999px; color: var(--accent);
  vertical-align: middle; font-weight: 600;
}

main { max-width: 1200px; margin: 0 auto; padding: var(--space-lg) var(--space-md); }

.controls {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--space-md); margin-bottom: var(--space-lg);
}

.controls .full-width { grid-column: 1 / -1; }

.input-group label {
  display: block; font-size: 0.78rem; color: var(--fg2);
  margin-bottom: var(--space-xs); font-weight: 700;
  letter-spacing: 0.02em;
}

.input-group input[type="text"],
.input-group select {
  width: 100%; padding: 0.65rem 0.9rem;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--r); color: var(--fg);
  font-size: 0.95rem; font-family: inherit;
  transition: border-color 0.2s var(--ease-out-quart), box-shadow 0.2s var(--ease-out-quart);
}

.input-group input:focus, .input-group select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.input-group select optgroup { font-weight: 700; color: var(--fg2); background: var(--bg-1); }
.input-group select option { font-weight: 400; color: var(--fg); background: var(--bg-1); }

.color-row { display: flex; align-items: center; gap: 0.75rem; }

#color-input {
  width: 44px; height: 44px; border: 2px solid var(--border);
  border-radius: var(--r); cursor: pointer; background: transparent;
  padding: 2px;
}

#color-input::-webkit-color-swatch-wrapper { padding: 0; }
#color-input::-webkit-color-swatch { border: none; border-radius: 7px; }

.color-swatches { display: flex; gap: 8px; flex-wrap: wrap; }

.color-swatch {
  width: 32px; height: 32px; border-radius: 50%;
  border: 2px solid transparent; cursor: pointer;
  transition: transform 0.15s ease-out, border-color 0.15s ease-out, box-shadow 0.15s ease-out;
}

.color-swatch:hover {
  transform: scale(1.15); border-color: var(--fg2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.logo-section {
  margin-bottom: var(--space-lg);
  display: flex; gap: var(--space-md); align-items: flex-start; flex-wrap: wrap;
}

.logo-upload-area {
  flex: 0 0 160px; height: 80px;
  border: 2px dashed var(--border-accent); border-radius: var(--r);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: border-color 0.2s ease-out, background 0.2s ease-out;
  position: relative; overflow: hidden;
  background: var(--accent-soft);
}

.logo-upload-area:hover, .logo-upload-area.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.logo-drop-content {
  text-align: center; font-size: 0.7rem; color: var(--fg2);
  padding: var(--space-sm);
}

.logo-drop-icon { display: block; font-size: 1.4rem; margin-bottom: var(--space-xs); color: var(--accent); }

.logo-preview-wrap {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm);
}

.logo-preview-wrap img {
  width: 48px; height: 48px; object-fit: cover;
  border-radius: 8px; border: 1px solid var(--border);
}

.logo-remove {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--secondary-soft); border: 1px solid var(--secondary);
  color: var(--secondary); cursor: pointer; font-size: 0.8rem;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}

.logo-remove:hover { background: var(--secondary); color: var(--bg-1); }

.logo-options {
  flex: 1; display: flex; gap: var(--space-md);
  align-items: center; flex-wrap: wrap;
  min-width: 0;
}

.logo-opt-group {
  display: flex; flex-direction: column; gap: 0.3rem;
}

.logo-opt-group label {
  font-size: 0.7rem; color: var(--fg2); font-weight: 700;
}

.logo-shapes, .logo-positions { display: flex; gap: 4px; }

.logo-shape-btn, .logo-pos-btn {
  width: 36px; height: 36px; border: 1px solid var(--border);
  border-radius: 6px; background: var(--bg-2);
  color: var(--fg); cursor: pointer; font-size: 1rem;
  transition: border-color 0.15s ease-out, background 0.15s ease-out;
}

.logo-shape-btn:hover, .logo-pos-btn:hover { border-color: var(--accent); }
.logo-shape-btn.active, .logo-pos-btn.active {
  background: var(--accent); border-color: var(--accent); color: var(--bg-1);
}

.logo-toggles { display: flex; gap: 4px; align-items: center; }

.logo-toggle {
  padding: 0.3rem 0.6rem; border: 1px solid var(--border);
  border-radius: 6px; background: var(--bg-2);
  color: var(--fg2); font-size: 0.75rem; font-family: inherit;
  cursor: pointer; transition: all 0.15s ease-out;
}

.logo-toggle.active { background: var(--accent); border-color: var(--accent); color: var(--bg-1); }

.logo-opt-group select {
  padding: 0.3rem 0.4rem; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 6px;
  color: var(--fg); font-size: 0.75rem; font-family: inherit;
}

.logo-range {
  width: 80px; accent-color: var(--accent);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.col-preview { position: sticky; top: var(--space-md); }

.preview-sticky canvas {
  width: 100%; height: auto;
  border-radius: var(--r); border: 1px solid var(--border);
  box-shadow: 0 4px 20px var(--accent-soft);
}

.preview-actions {
  display: flex; gap: 0.75rem; margin-top: var(--space-md);
}

#dl-btn, #random-btn {
  flex: 1; padding: 0.7rem var(--space-md);
  border: none; border-radius: var(--r);
  font-size: 0.9rem; font-weight: 700; font-family: inherit;
  cursor: pointer;
  transition: transform 0.1s var(--ease-out-quart), box-shadow 0.2s var(--ease-out-quart), background 0.2s var(--ease-out-quart);
}

#dl-btn {
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  color: var(--bg-1);
  box-shadow: 0 2px 8px var(--accent-glow);
}

#dl-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 12px var(--accent-glow);
}

#random-btn {
  background: var(--surface-warm); color: var(--accent);
  border: 1px solid var(--border-accent);
}

#random-btn:hover {
  border-color: var(--accent); transform: translateY(-1px);
  background: var(--accent-soft);
}
#dl-btn:active, #random-btn:active { transform: translateY(0); }

.cat-tabs {
  display: flex; gap: var(--space-sm); margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.cat-tab {
  padding: 0.4rem 0.85rem; background: var(--bg-2);
  border: 1px solid var(--border); border-radius: 999px;
  color: var(--fg2); font-size: 0.75rem; font-family: inherit;
  cursor: pointer; white-space: nowrap;
  transition: border-color 0.2s ease-out, color 0.2s ease-out, background 0.2s ease-out;
}

.cat-tab:hover { border-color: var(--accent); color: var(--accent); }
.cat-tab.active {
  background: var(--accent); border-color: var(--accent); color: var(--bg-1);
  box-shadow: 0 2px 8px var(--accent-soft);
}

.tpl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.6rem;
}

.tpl-card {
  aspect-ratio: 1200 / 630; border-radius: 6px;
  border: 2px solid transparent; cursor: pointer;
  overflow: hidden; position: relative;
  transition: transform 0.2s var(--ease-out-quart), border-color 0.2s var(--ease-out-quart), box-shadow 0.2s var(--ease-out-quart);
}

.tpl-card:hover {
  transform: translateY(-2px); border-color: var(--accent);
  box-shadow: 0 3px 8px var(--accent-soft);
}
.tpl-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.tpl-card canvas { width: 100%; height: 100%; display: block; }

.tpl-name {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 3px 6px; background: rgba(17, 17, 32, 0.7);
  color: var(--bg-1); font-size: 0.6rem; text-align: center;
  opacity: 0; transition: opacity 0.2s ease-out;
}

.tpl-card:hover .tpl-name { opacity: 1; }

footer {
  text-align: center; padding: var(--space-xl);
  color: var(--fg2); font-size: 0.8rem;
  border-top: 1px solid var(--border);
}
footer a { color: var(--accent); text-decoration: none; font-weight: 600; }
footer a:hover { color: var(--secondary); }

@media (max-width: 768px) {
  :root {
    --space-lg: 1.25rem;
    --space-xl: 2rem;
  }
  .controls { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .col-preview { position: static; }
  .tpl-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); }
  header h1 { font-size: 1.5rem; }
  .color-swatches { gap: 6px; }
  .color-swatch { width: 32px; height: 32px; }
  .logo-section { flex-direction: column; }
  .logo-upload-area { flex: none; width: 100%; }
  .logo-options { flex-direction: column; align-items: flex-start; }
  .preview-actions { flex-direction: column; }
  #dl-btn, #random-btn { padding: 0.8rem var(--space-md); min-height: 48px; font-size: 1rem; }
  .header-actions { top: var(--space-sm); right: var(--space-sm); }
  .cat-tab { padding: 0.45rem 0.9rem; font-size: 0.8rem; }
}

/* タブレット中間サイズ */
@media (min-width: 769px) and (max-width: 1023px) {
  .two-col { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
  .tpl-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
  .col-preview { position: static; }
}

/* 超小画面対応 */
@media (max-width: 360px) {
  header h1 { font-size: 1.3rem; }
  header p { font-size: 0.8rem; }
  .size-badge { display: none; }
  .color-swatch { width: 28px; height: 28px; }
  .color-swatches { gap: 4px; }
  .logo-shape-btn, .logo-pos-btn { width: 32px; height: 32px; font-size: 0.85rem; }
  .tpl-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); gap: 0.4rem; }
}

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

@keyframes dl-success {
  0% { transform: scale(1); }
  50% { transform: scale(0.97); }
  100% { transform: scale(1); }
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tpl-card {
  animation: fade-in-up 0.3s var(--ease-out-quart) both;
}

.dl-success {
  animation: dl-success 0.3s var(--ease-out-quart);
}

/* optimize: パフォーマンス向上 */
.tpl-grid {
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

.preview-sticky canvas {
  contain: content;
}