:root {
  --bg: #f3e7cf;
  --ink: #3a2418;
  --accent: #b43b2a;
  --blue: #1a4a9c;
  --paper: #fffaf0;
  --line: #d8c5a3;
  --shadow: 0 10px 28px rgba(70, 40, 10, 0.12);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --font: "Yu Gothic", "YuGothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, #f7edda 0, transparent 42%),
    repeating-linear-gradient(0deg, rgba(140,100,40,0.03) 0 2px, transparent 2px 7px),
    var(--bg);
  min-height: 100vh;
  padding-bottom: calc(18px + var(--safe-b));
}

.app-header {
  padding: 16px 16px 8px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}
.kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--accent);
}
h1 {
  margin: 2px 0 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.header-note {
  margin: 0;
  font-size: 12px;
  color: #6d5840;
  max-width: 280px;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 0 12px 12px;
}

.preview-panel, .editor-panel, .info-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.preview-panel { padding: 12px; }

.preview-stage {
  position: relative;
  touch-action: none;
  background:
    linear-gradient(45deg, #ece2c8 25%, transparent 25%) 0 0 / 18px 18px,
    linear-gradient(-45deg, #ece2c8 25%, transparent 25%) 0 9px / 18px 18px,
    #f7f1e2;
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: min(72vw, 420px);
}
#previewCanvas {
  width: min(100%, 560px);
  height: auto;
  display: block;
  max-height: min(72vh, 560px);
  cursor: grab;
}
#previewCanvas:active { cursor: grabbing; }
.preview-hint {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  text-align: center;
  font-size: 11px;
  color: #5c4a36;
  background: rgba(255,250,240,0.78);
  border-radius: 999px;
  padding: 6px 10px;
  pointer-events: none;
}

.preview-actions, .quick-actions, .save-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

button, .file-btn {
  appearance: none;
  border: 1px solid #c7b090;
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.file-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.file-btn input { display: none; }
button.primary, #downloadBtn {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
button:active { transform: translateY(1px); }

.thumb-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  padding: 8px;
  background: #f6ecd6;
  border-radius: 12px;
}
.thumb-row[hidden] { display: none !important; }
.thumb-row img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
}
.thumb-row p {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
}

.tabs {
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid var(--line);
  padding: 6px;
  gap: 6px;
}
.tab {
  flex: 0 0 auto;
  border-radius: 12px;
  min-width: 72px;
  background: transparent;
  border: 0;
}
.tab.is-active {
  background: #1a4a9c;
  color: #fff;
}

.tab-body { display: none; padding: 12px 14px 18px; }
.tab-body.is-active { display: block; }
h2 {
  font-size: 13px;
  letter-spacing: 0.08em;
  margin: 16px 0 8px;
  color: var(--accent);
}
.tab-body h2:first-child { margin-top: 4px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin: 10px 0;
}
input[type="text"], select, input[type="color"] {
  width: 100%;
  min-height: 44px;
  margin-top: 6px;
  border-radius: 12px;
  border: 1px solid #d7c4a4;
  background: #fff;
  font-family: inherit;
  font-size: 16px;
  padding: 8px 10px;
}
input[type="range"] {
  width: 100%;
  min-height: 36px;
  margin-top: 6px;
  accent-color: var(--blue);
}
.help { font-size: 12px; color: #6d5840; margin: 0 0 8px; }
.toggle-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  font-weight: 700;
  background: #f7f0e2;
  border-radius: 12px;
  padding: 6px 10px;
}
.check input { width: 20px; height: 20px; }

.chip-grid, .template-grid, .color-presets, .deco-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.template-grid { grid-template-columns: 1fr; }
.chip, .tpl-card, .ink-swatch, .deco-item {
  border: 1px solid #d7c4a4;
  background: #fff;
  border-radius: 14px;
  min-height: 44px;
  padding: 10px 12px;
  text-align: left;
  font-family: inherit;
  cursor: pointer;
}
.chip.is-active, .tpl-card.is-active, .ink-swatch.is-active, .deco-item.is-active {
  border-color: var(--blue);
  box-shadow: inset 0 0 0 2px var(--blue);
  background: #eef3fb;
}
.tpl-card small { display: block; color: #6d5840; font-weight: 500; margin-top: 4px; }
.ink-swatch {
  display: flex;
  align-items: center;
  gap: 8px;
}
.ink-swatch i {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0,0,0,.15);
}
.deco-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.size-now {
  font-size: 20px;
  font-weight: 800;
  margin: 12px 0;
}
.size-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 12px;
}
.size-table th, .size-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px 4px;
  text-align: left;
}
.size-table td:last-child, .size-table th:last-child { text-align: right; }
.meta-box, .info-panel pre {
  background: #2b2118;
  color: #f4e7cc;
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
}
.info-panel { margin: 0 12px; padding: 12px 14px 16px; }
.info-panel h2 { margin-top: 0; }

@media (min-width: 960px) {
  .layout {
    grid-template-columns: minmax(360px, 520px) 1fr;
    align-items: start;
    padding: 0 18px 18px;
  }
  .preview-panel { position: sticky; top: 12px; }
  .info-panel {
    margin: 0 18px 24px;
  }
  .chip-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .template-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .toggle-row { grid-template-columns: 1fr; }
}

.restore-note {
  margin: 8px 0 0;
  font-size: 13px;
  color: #8a3b1a;
  background: #f8e6d2;
  padding: 8px 10px;
  border-radius: 10px;
}
.color-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.ink-swatch.big {
  min-height: 56px;
  font-size: 15px;
  margin-bottom: 8px;
}
.ink-swatch.big i { width: 28px; height: 28px; }
details.more {
  margin: 14px 0;
  background: #f7f0e2;
  border-radius: 12px;
  padding: 8px 12px;
}
details.more summary {
  font-weight: 800;
  min-height: 44px;
  display: flex;
  align-items: center;
  cursor: pointer;
}
h3 {
  font-size: 12px;
  margin: 14px 0 6px;
  color: #6d5840;
}
.custom-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px;
  margin-bottom: 8px;
}
.custom-row strong { flex: 1 1 120px; }
.part-edit { margin-top: 8px; }
@media (max-width: 700px) {
  .color-duo { grid-template-columns: 1fr; }
}