@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500&family=DM+Mono&display=swap');

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

:root {
  --bg: #f5f5f3;
  --surface: #ffffff;
  --surface2: #f0f0ee;
  --border: #e0e0dc;
  --border2: #d0d0cc;
  --text: #1a1a18;
  --text-m: #999990;
  --tab-h: 56px;
  --panel-h: 200px;
  --header-h: 48px;
  --sidebar-w: 200px;
}

html, body {
  height: 100%;
  overflow: hidden;
  touch-action: none;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  display: flex;
  flex-direction: column;
  user-select: none;
  -webkit-user-select: none;
}

/* ═══════════════════════════════
   HEADER
═══════════════════════════════ */
header {
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  z-index: 10;
}
.logo {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text);
}
.header-right { display: flex; gap: 8px; align-items: center; }

.size-badge {
  font-size: 9px;
  font-family: 'DM Mono', monospace;
  color: var(--text-m);
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  padding: 3px 7px;
  letter-spacing: .04em;
}

.zoom-badge {
  font-size: 9px;
  font-family: 'DM Mono', monospace;
  color: var(--text-m);
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 4px;
  padding: 3px 7px;
  letter-spacing: .04em;
  min-width: 38px;
  text-align: center;
}

.btn {
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--border2);
  border-radius: 6px;
  background: transparent;
  color: var(--text-m);
  font-family: inherit;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .08em;
  cursor: pointer;
  transition: all .15s;
  text-transform: uppercase;
  white-space: nowrap;
  display: flex; align-items: center; gap: 4px;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { background: var(--surface2); }
.btn.danger:active { color: #d44; border-color: #d44; background: #fff8f8; }
.btn.primary { background: var(--text); border-color: var(--text); color: #fff; }
.btn.primary:active { background: #333; }

/* ═══════════════════════════════
   MAIN LAYOUT
═══════════════════════════════ */
.app-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* ═══════════════════════════════
   PC SIDEBAR (≥768px)
═══════════════════════════════ */
.sidebar {
  display: none;
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  flex-direction: column;
  padding: 18px 14px 14px;
  gap: 22px;
  overflow-y: auto;
}
.app-body.left-handed .sidebar {
  border-right: none;
  border-left: 1px solid var(--border);
  order: 2;
}
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.section-label {
  font-size: 9px;
  letter-spacing: .16em;
  color: var(--text-m);
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 8px;
}

/* ═══════════════════════════════
   PALETTE
═══════════════════════════════ */
.palette-wrap { display: flex; gap: 4px; }
.color-column { display: flex; flex-direction: column; gap: 3px; flex: 1; }
.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition: transform .1s, border-color .1s;
  -webkit-tap-highlight-color: transparent;
}
.color-swatch:active { transform: scale(1.12); }
.color-swatch.active { border-color: var(--text); transform: scale(1.1); }
.color-swatch.light { border-color: var(--border); }
.color-swatch.light.active { border-color: var(--text); }

/* ═══════════════════════════════
   STROKE DROPDOWN (PC)
═══════════════════════════════ */
.stroke-dropdown { position: relative; }
.stroke-trigger {
  width: 100%; height: 36px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 6px;
  display: flex; align-items: center;
  padding: 0 10px 0 12px;
  cursor: pointer;
  transition: border-color .15s;
  -webkit-tap-highlight-color: transparent;
}
.stroke-trigger:hover { border-color: var(--text); }
.stroke-trigger.open { border-color: var(--text); border-bottom-color: transparent; border-radius: 6px 6px 0 0; }
.trigger-bar-wrap { flex: 1; display: flex; align-items: center; height: 100%; }
.stroke-bar { background: var(--text); border-radius: 99px; flex-shrink: 0; }
.trigger-px { margin-left: auto; font-size: 10px; font-family: 'DM Mono', monospace; color: var(--text-m); padding-left: 6px; }
.trigger-arrow { font-size: 8px; color: var(--text-m); margin-left: 6px; transition: transform .15s; flex-shrink: 0; }
.stroke-trigger.open .trigger-arrow { transform: rotate(180deg); }
.stroke-panel {
  display: none; position: absolute; left: 0; right: 0; top: 100%;
  background: var(--surface);
  border: 1px solid var(--text); border-top: none;
  border-radius: 0 0 6px 6px;
  z-index: 300;
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
  overflow: hidden;
}
.stroke-panel.open { display: block; }
.stroke-row {
  display: flex; align-items: center; height: 36px;
  padding: 0 12px; cursor: pointer;
  transition: background .1s;
}
.stroke-row:hover,
.stroke-row.selected { background: var(--surface2); }
.row-bar-wrap { flex: 1; display: flex; align-items: center; height: 100%; }
.row-px { margin-left: auto; font-size: 10px; font-family: 'DM Mono', monospace; color: var(--text-m); padding-left: 6px; }

/* ═══════════════════════════════
   SIZE SELECTOR (PC)
═══════════════════════════════ */
.size-options { display: flex; flex-direction: column; gap: 4px; }
.size-opt {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 10px;
  border: 1px solid var(--border2);
  border-radius: 6px;
  cursor: pointer;
  transition: all .15s;
  background: var(--surface2);
  -webkit-tap-highlight-color: transparent;
}
.size-opt:hover { border-color: var(--text); }
.size-opt.active { border-color: var(--text); background: var(--text); }
.size-opt-label { font-size: 11px; font-weight: 500; color: var(--text); }
.size-opt.active .size-opt-label { color: #fff; }
.size-opt-sub { font-size: 9px; font-family: 'DM Mono', monospace; color: var(--text-m); }
.size-opt.active .size-opt-sub { color: rgba(255,255,255,.6); }

/* ═══════════════════════════════
   PC SIDEBAR BOTTOM
═══════════════════════════════ */
.sidebar-bottom {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.hand-toggle { display: flex; gap: 4px; }
.hand-btn {
  flex: 1; height: 28px;
  font-size: 10px; letter-spacing: .06em;
  border: 1px solid var(--border2); border-radius: 5px;
  background: transparent; color: var(--text-m);
  cursor: pointer; transition: all .15s;
  font-family: inherit; text-transform: uppercase; font-weight: 500;
  -webkit-tap-highlight-color: transparent;
}
.hand-btn.active { background: var(--text); border-color: var(--text); color: #fff; }

/* ═══════════════════════════════
   CANVAS AREA
═══════════════════════════════ */
.canvas-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
  overflow: hidden;
  position: relative;
}
#mainCanvas {
  display: block;
  cursor: crosshair;
  touch-action: none;
  box-shadow: 0 2px 28px rgba(0,0,0,.09), 0 0 0 1px var(--border);
  transform-origin: 50% 50%;
  /* transform使用時にレイアウトが崩れないよう */
  flex-shrink: 0;
}

/* ═══════════════════════════════
   MOBILE BOTTOM TAB BAR
═══════════════════════════════ */
.tab-bar {
  display: none;
  height: var(--tab-h);
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 50;
}
.tab-bar-inner {
  display: flex;
  height: 100%;
}
.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  cursor: pointer;
  border: none;
  background: transparent;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  transition: background .1s;
  position: relative;
}
.tab-btn:active { background: var(--surface2); }
.tab-btn.active { background: var(--surface2); }
.tab-icon { font-size: 18px; line-height: 1; }
.tab-label { font-size: 9px; letter-spacing: .06em; text-transform: uppercase; color: var(--text-m); font-weight: 500; }
.tab-btn.active .tab-label { color: var(--text); }

.tab-color-dot {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border2);
  flex-shrink: 0;
}

/* ═══════════════════════════════
   MOBILE PANEL (slides up)
═══════════════════════════════ */
.mobile-panel {
  display: none;
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 40;
  padding: 16px;
  transform: translateY(100%);
  transition: transform .22s cubic-bezier(.4,0,.2,1);
}
.mobile-panel.visible {
  transform: translateY(0);
}

/* Color panel */
#panelColor { padding: 14px 16px 20px; }
.mobile-palette-wrap { display: flex; gap: 5px; }
.mobile-palette-wrap .color-column { gap: 4px; }
.mobile-palette-wrap .color-swatch { border-radius: 5px; }

/* Stroke panel */
#panelStroke { padding: 14px 16px 24px; }
.mobile-stroke-list { display: flex; flex-direction: column; gap: 2px; }
.mobile-stroke-row {
  display: flex; align-items: center;
  height: 42px; padding: 0 12px;
  border-radius: 7px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background .1s;
}
.mobile-stroke-row:active,
.mobile-stroke-row.selected { background: var(--surface2); }
.mobile-row-bar-wrap { flex: 1; display: flex; align-items: center; height: 100%; }
.mobile-row-px { font-size: 11px; font-family: 'DM Mono', monospace; color: var(--text-m); padding-left: 8px; }

/* Size panel */
#panelSize { padding: 14px 16px 24px; }
.mobile-size-list { display: flex; flex-direction: column; gap: 6px; }
.mobile-size-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px;
  border: 1px solid var(--border2);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
  -webkit-tap-highlight-color: transparent;
  background: var(--surface2);
}
.mobile-size-row:active { border-color: var(--text); }
.mobile-size-row.active { border-color: var(--text); background: var(--text); }
.mobile-size-name { font-size: 13px; font-weight: 500; }
.mobile-size-row.active .mobile-size-name { color: #fff; }
.mobile-size-meta { font-size: 10px; font-family: 'DM Mono', monospace; color: var(--text-m); }
.mobile-size-row.active .mobile-size-meta { color: rgba(255,255,255,.55); }
.mobile-size-aspect {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
}
.aspect-rect {
  background: transparent;
  border: 1.5px solid var(--border2);
  border-radius: 2px;
  transition: border-color .15s;
}
.mobile-size-row.active .aspect-rect { border-color: rgba(255,255,255,.5); }

/* Settings panel */
#panelSettings { padding: 14px 16px 24px; gap: 16px; display: none; flex-direction: column; }
#panelSettings.visible { display: flex; }
.settings-row { display: flex; flex-direction: column; gap: 8px; }
.settings-label { font-size: 9px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-m); font-weight: 500; }
.toggle-group { display: flex; gap: 6px; }
.toggle-btn {
  flex: 1; height: 36px;
  font-size: 11px; letter-spacing: .05em;
  border: 1px solid var(--border2); border-radius: 7px;
  background: var(--surface2); color: var(--text-m);
  cursor: pointer; transition: all .15s;
  font-family: inherit; text-transform: uppercase; font-weight: 500;
  -webkit-tap-highlight-color: transparent;
}
.toggle-btn.active { background: var(--text); border-color: var(--text); color: #fff; }

.panel-handle {
  width: 36px; height: 4px;
  background: var(--border2);
  border-radius: 2px;
  margin: 0 auto 12px;
}

.panel-overlay {
  display: none;
  position: absolute;
  inset: 0;
  z-index: 39;
}
.panel-overlay.visible { display: block; }

/* ═══════════════════════════════
   RESPONSIVE
═══════════════════════════════ */
@media (min-width: 768px) {
  .sidebar { display: flex; }
  .tab-bar { display: none !important; }
  .mobile-panel { display: none !important; }
  .panel-overlay { display: none !important; }
  .zoom-badge { display: none; } /* PC では非表示 */
}
@media (max-width: 767px) {
  .sidebar { display: none !important; }
  .tab-bar { display: block; }
  .mobile-panel { display: block; }
  .canvas-wrap { position: relative; }
  #tabSettings { display: none; } /* スマホでSettingsタブ非表示 */
}