:root {
  --bg: #f3f4f8;
  --panel: #ffffff;
  --panel-alt: #f9fafc;
  --border: #e4e7ee;
  --text: #1a1d27;
  --muted: #6b7280;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-contrast: #ffffff;
  --primary-soft: #eef0ff;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --danger-soft: #fee2e2;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
  --checker-a: #e9ebf1;
  --checker-b: #f6f7fa;
  --radius: 12px;
  --radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14151c;
    --panel: #1b1d27;
    --panel-alt: #20222e;
    --border: #30323f;
    --text: #e8e9f0;
    --muted: #9298ab;
    --primary: #818cf8;
    --primary-hover: #a5b4fc;
    --primary-contrast: #12131c;
    --primary-soft: #262a3d;
    --danger: #f87171;
    --danger-hover: #fca5a5;
    --danger-soft: #3a2230;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    --checker-a: #23252f;
    --checker-b: #1b1d27;
  }
}

:root[data-theme="dark"] {
  --bg: #14151c;
  --panel: #1b1d27;
  --panel-alt: #20222e;
  --border: #30323f;
  --text: #e8e9f0;
  --muted: #9298ab;
  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-contrast: #12131c;
  --primary-soft: #262a3d;
  --danger: #f87171;
  --danger-hover: #fca5a5;
  --danger-soft: #3a2230;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --checker-a: #23252f;
  --checker-b: #1b1d27;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  transition: background-color 0.2s ease, color 0.2s ease;
}

svg { flex-shrink: 0; }

/* ---------- Topbar ---------- */

.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
}

.topbar:has(#modeTabs:not(.hidden)) .hint {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 4px;
  border: none;
  background: none;
  padding: 3px 5px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text);
}

.brand:hover { background: var(--panel-alt); }

.brand-mark {
  width: 26px;
  height: 26px;
  display: block;
  border-radius: 7px;
  box-shadow: var(--shadow);
}

.brand-name {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.01em;
}

.topbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.hint {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Action bar ---------- */

.actionbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--panel-alt);
  border-bottom: 1px solid var(--border);
  flex-wrap: nowrap;
  overflow-x: auto;
  flex-shrink: 0;
}

.actionbar .btn { flex-shrink: 0; white-space: nowrap; }

/* ---------- Mode tabs ---------- */

.mode-tabs {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  white-space: nowrap;
}

.mode-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border: none;
  border-radius: 999px;
  background: none;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}

.mode-tab svg { width: 14px; height: 14px; }

.mode-tab:hover { color: var(--text); background: var(--panel-alt); }

.mode-tab.active {
  color: var(--primary);
  background: var(--primary-soft);
}

.actionbar-spacer { flex: 1; }

.field-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.field-label svg { width: 14px; height: 14px; flex-shrink: 0; }

.text-input {
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  font-size: 12px;
  min-width: 300px;
  max-width: 640px;
  field-sizing: content;
}

.btn-icon {
  padding: 6px;
}

/* ---------- Export dropdown ---------- */

.export-dropdown {
  position: relative;
  flex-shrink: 0;
}

.export-chevron {
  width: 12px !important;
  height: 12px !important;
  margin-left: 2px;
}

.export-menu {
  position: fixed;
  width: 280px;
  max-width: calc(100vw - 16px);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 200;
}

.export-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.export-menu-item:hover { background: var(--primary-soft); }

.export-menu-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--primary);
}

.export-menu-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.export-menu-text strong {
  font-size: 13px;
  font-weight: 600;
}

.export-menu-text small {
  font-size: 11px;
  color: var(--muted);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.btn svg { width: 14px; height: 14px; }

.btn:hover { background: var(--primary-soft); border-color: var(--primary); }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--primary);
  color: var(--primary-contrast);
  border-color: var(--primary);
}

.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn-lg {
  padding: 12px 22px;
  font-size: 14px;
  border-radius: var(--radius);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  margin-left: auto;
}

.icon-btn svg { width: 15px; height: 15px; }
.icon-btn:hover { background: var(--primary-soft); border-color: var(--primary); }

/* ---------- Landing (empty state) ---------- */

.landing {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.landing-inner {
  max-width: 620px;
  width: 100%;
  text-align: center;
}

.landing-inner > h1 {
  font-size: 22px;
  margin: 0 0 4px;
}

.landing-inner > p {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 28px;
}

.landing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.landing-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--panel);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s ease, transform 0.1s ease;
}

.landing-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.landing-icon {
  width: 34px;
  height: 34px;
  color: var(--primary);
  margin-bottom: 10px;
}

.landing-card h2 {
  font-size: 15px;
  margin: 0 0 4px;
}

.landing-card p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  margin: 0;
}

.landing-formats {
  margin-top: 24px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Tool mode panel (merge / split / compress) ---------- */

.tool-mode-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.tool-mode-card {
  max-width: 420px;
  text-align: center;
}

.tool-mode-card h2 {
  font-size: 19px;
  margin: 0 0 10px;
}

.tool-mode-card p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin: 0 0 24px;
}

/* ---------- Workspace ---------- */

.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.page-rail {
  width: 210px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.page-rail::-webkit-scrollbar { width: 10px; }
.page-rail::-webkit-scrollbar-track { background: transparent; }
.page-rail::-webkit-scrollbar-thumb {
  background-color: var(--border);
  border-radius: 999px;
  border: 2px solid var(--panel);
  background-clip: padding-box;
}
.page-rail::-webkit-scrollbar-thumb:hover { background-color: var(--muted); }

.page-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px;
  background: var(--panel-alt);
  cursor: grab;
  position: relative;
  user-select: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.page-card:hover { border-color: var(--primary); }
.page-card:active { cursor: grabbing; }

.page-card.active {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.page-card.dragging {
  opacity: 0.4;
}

.page-card.drag-over {
  border-color: var(--primary);
  box-shadow: 0 -3px 0 0 var(--primary);
}

.page-card img {
  width: 100%;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
}

.page-card-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}

.page-card-index {
  font-size: 11px;
  color: var(--muted);
  min-width: 16px;
}

.page-card-name-wrap {
  position: relative;
  flex: 1;
  min-width: 0;
}

.page-card-name {
  width: 100%;
  font-size: 11px;
  padding: 4px 20px 4px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel);
  color: var(--text);
}

.page-card-name:hover, .page-card-name:focus {
  border-color: var(--primary);
}

.page-card-name-pencil {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  width: 11px;
  height: 11px;
  color: var(--muted);
  pointer-events: none;
}

.page-card-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}

.page-card-checkbox {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--muted);
}

.page-card-delete {
  border: none;
  background: none;
  color: var(--danger);
  cursor: pointer;
  padding: 2px 4px;
  display: flex;
  border-radius: 5px;
}

.page-card-delete svg { width: 14px; height: 14px; }
.page-card-delete:hover { background: var(--danger-soft); }

/* ---------- Editor area / toolbar ---------- */

.editor-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#editModePanel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  flex-shrink: 0;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 4px 7px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-size: 10px;
  min-width: 42px;
}

.tool-btn svg { width: 15px; height: 15px; }

.tool-btn:hover { background: var(--panel-alt); border-color: var(--border); }

.tool-btn.active {
  background: var(--primary-soft);
  color: var(--primary);
  border-color: var(--primary);
}

.tool-btn.icon-only { min-width: auto; padding: 6px; }

.tool-btn.danger { color: var(--danger); }
.tool-btn.danger:hover { background: var(--danger-soft); border-color: var(--danger); }

.toolbar-sep {
  width: 1px;
  height: 22px;
  background: var(--border);
}

.style-group {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel-alt);
  border: 1px solid var(--border);
}

.style-group-sep {
  width: 1px;
  height: 14px;
  background: var(--border);
  flex-shrink: 0;
}

.style-control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.swatch-btn {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--panel);
  box-shadow: 0 0 0 1.5px var(--border);
  background: var(--swatch-color, #000);
  cursor: pointer;
  padding: 0;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.swatch-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 0 0 1.5px var(--primary);
}

.swatch-btn.checker {
  background-image:
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-a) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-a) 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
  background-color: var(--checker-b);
}

#strokeWidth { width: 70px; }

.style-select {
  font-size: 11px;
  padding: 3px 4px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel);
  color: var(--text);
  max-width: 90px;
}

.style-number {
  font-size: 11px;
  padding: 3px 4px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel);
  color: var(--text);
  width: 48px;
}
.font-step-btn {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 6px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}
.font-step-btn:hover { border-color: var(--primary); color: var(--primary); }
#qualitySlider { width: 100px; }

/* ---------- Range sliders ---------- */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--primary) 0%,
    var(--primary) var(--range-progress, 50%),
    var(--border) var(--range-progress, 50%),
    var(--border) 100%
  );
  outline: none;
  cursor: pointer;
  vertical-align: middle;
  flex-shrink: 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--panel);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  transition: transform 0.12s ease;
}

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

input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 999px;
  background: var(--border);
}

input[type="range"]::-moz-range-progress {
  height: 4px;
  border-radius: 999px;
  background: var(--primary);
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--panel);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  cursor: pointer;
}

/* ---------- Color popover ---------- */

.color-popover {
  position: fixed;
  z-index: 100;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  width: 176px;
}

.color-popover-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}

.color-swatch-option {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--swatch-color, #000);
  cursor: pointer;
  padding: 0;
}

.color-swatch-option.checker {
  background-image:
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-a) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-a) 75%);
  background-size: 8px 8px;
  background-position: 0 0, 0 4px, 4px -4px, -4px 0px;
  background-color: var(--checker-b);
}

.color-popover-custom {
  border-top: 1px solid var(--border);
  padding-top: 8px;
  font-size: 11px;
  color: var(--muted);
}

.color-popover-custom label {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.color-popover-custom input[type="color"] {
  width: 40px;
  height: 26px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0;
  background: none;
  cursor: pointer;
}

/* ---------- Stamp popover ---------- */

.stamp-popover {
  position: fixed;
  z-index: 100;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  width: 190px;
}

.stamp-popover-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

.stamp-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel-alt);
  padding: 6px;
  cursor: pointer;
  font-size: 11px;
  color: var(--muted);
}

.stamp-option:hover { border-color: var(--primary); color: var(--text); }

.stamp-option img {
  width: 100%;
  height: 64px;
  object-fit: contain;
}

.stamp-custom-btn {
  width: 100%;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: none;
  color: var(--muted);
  font-size: 12px;
  padding: 7px;
  cursor: pointer;
}

.stamp-custom-btn:hover { border-color: var(--primary); color: var(--primary); }
.stamp-custom-btn + .stamp-custom-btn { margin-top: 6px; }

/* 印鑑・署名のマイデータ（端末に保存） */
.stamp-option { position: relative; }
.stamp-remove {
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 13px;
  line-height: 1;
  color: var(--muted);
  opacity: 0;
}
.stamp-option:hover .stamp-remove { opacity: 1; }
.stamp-remove:hover { color: var(--danger, #ef4444); }
.mydata-empty {
  margin: 8px 4px 0;
  font-size: 11px;
  line-height: 1.5;
  color: var(--muted);
}
.mydata-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 10px;
  margin-top: 8px;
  padding: 6px 4px 0;
  border-top: 1px solid var(--border);
}
.mydata-link {
  border: none;
  background: none;
  padding: 2px 0;
  font-size: 11px;
  color: var(--primary);
  cursor: pointer;
}
.mydata-link:hover { text-decoration: underline; }

/* ---------- Canvas ---------- */

.canvas-wrap {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px;
  position: relative;
  background-image:
    linear-gradient(45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(-45deg, var(--checker-a) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--checker-a) 75%),
    linear-gradient(-45deg, transparent 75%, var(--checker-a) 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  background-color: var(--checker-b);
  scrollbar-width: thin;
  scrollbar-color: var(--muted) transparent;
}

.canvas-wrap.pan-ready,
.canvas-wrap.pan-ready * { cursor: grab !important; }

.canvas-wrap.panning,
.canvas-wrap.panning * { cursor: grabbing !important; }

.canvas-wrap::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

.canvas-wrap::-webkit-scrollbar-track {
  background: transparent;
}

.canvas-wrap::-webkit-scrollbar-thumb {
  background-color: var(--muted);
  border-radius: 999px;
  border: 3px solid var(--checker-b);
  background-clip: padding-box;
}

.canvas-wrap::-webkit-scrollbar-thumb:hover {
  background-color: var(--primary);
}

.canvas-wrap::-webkit-scrollbar-corner {
  background: transparent;
}

.zoom-controls {
  position: absolute;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  box-shadow: var(--shadow-lg);
  z-index: 5;
}

.zoom-controls button {
  width: 28px;
  height: 28px;
  border: none;
  background: none;
  border-radius: 50%;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.zoom-controls button:hover { background: var(--primary-soft); color: var(--primary); }

.zoom-controls span {
  font-size: 11px;
  color: var(--muted);
  width: 38px;
  text-align: center;
}

.canvas-empty {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--muted);
  font-size: 14px;
}

#fabricCanvas {
  box-shadow: var(--shadow-lg);
  background: #fff;
}

.hidden { display: none !important; }

/* ---------- Drop overlay ---------- */

.drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(99, 102, 241, 0.15);
  border: 4px dashed var(--primary);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.drop-overlay-inner {
  background: var(--panel);
  color: var(--text);
  padding: 30px 50px;
  border-radius: var(--radius);
  font-size: 18px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.drop-overlay-inner svg { color: var(--primary); }

.drop-overlay-inner span {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  z-index: 2000;
  box-shadow: var(--shadow-lg);
  max-width: 80vw;
}

.toast.toast-error {
  background: var(--danger);
  color: #fff;
}

/* ---------- Text format buttons / opacity ---------- */

.format-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 22px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--text);
  font-size: 12px;
  font-family: serif;
  cursor: pointer;
}
.format-btn svg { width: 14px; height: 14px; }
.format-btn:hover { background: var(--panel); border-color: var(--border); }
.format-btn.active { background: var(--primary-soft); border-color: var(--primary); color: var(--primary); }
.format-gap { width: 4px; }
#opacitySlider { width: 70px; }
.style-value { font-size: 11px; color: var(--muted); min-width: 32px; }

/* ---------- 署名 popover ---------- */

.signature-popover {
  width: 290px;
  max-height: 70vh;
  overflow-y: auto;
  padding: 6px;
}
.signature-group {
  font-size: 10px;
  font-weight: 700;
  color: var(--muted);
  padding: 8px 8px 3px;
}
.signature-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  width: 100%;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}
.signature-option:hover { background: var(--primary-soft); border-color: var(--primary); }
.signature-label { font-size: 11px; font-weight: 600; }
.signature-text {
  font-size: 11px;
  color: var(--muted);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- Right-click menu ---------- */

.context-menu {
  position: fixed;
  z-index: 120;
  min-width: 220px;
  padding: 5px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
}
.context-menu-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 6px 10px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--text);
  font-size: 12px;
  text-align: left;
  cursor: pointer;
}
.context-menu-item kbd { font-family: inherit; font-size: 11px; color: var(--muted); }
.context-menu-item:hover:not(:disabled) { background: var(--primary-soft); }
.context-menu-item:disabled { opacity: 0.4; cursor: default; }
.context-menu-sep { height: 1px; margin: 4px 6px; background: var(--border); }

/* The style pill grows with the comment controls; let it wrap on narrow windows. */
.style-group { flex-wrap: wrap; row-gap: 4px; min-width: 0; border-radius: 16px; }