:root {
  --ink: var(--color-text);
  --paper: var(--color-white);
  --memo: #f3e3b8;
  --memo-ink: #5c4a18;
  --note: #d7e8e4;
  --note-ink: #1f4640;
  --switch: var(--color-primary);
  --select: #4d6b7a;
  --danger: var(--color-error);
  --focus: #8ab4ff;
  --font-min: 18px;
}

html,
body {
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: var(--color-page);
  color: var(--color-text);
  font-size: var(--font-min);
}

.button,
.form-input,
.form-label,
.eyebrow,
.dialog-title,
.dialog-description,
.btn,
.palette-btn,
.outline button,
.switch button,
.toggle select,
.toggle-bar input,
.variant-list input {
  font-size: var(--font-min);
}

.button,
.topbar .button {
  min-height: 50px;
  padding: 10px 16px;
}

#view-editor {
  height: 100%;
  padding-top: 54px;
}

#view-editor[hidden] {
  display: none !important;
}

#app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100%;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: end;
  padding: 16px 20px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.title-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.title-field span {
  font-size: var(--font-min);
  color: var(--color-muted);
}

.title-field .form-input {
  max-width: 36rem;
  min-height: 50px;
}

.title-field input:focus,
.block:focus-within {
  outline: 3px solid rgba(23, 23, 23, 0.1);
  outline-offset: 1px;
}

.topbar-actions,
.block-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-control-border);
  background: var(--color-secondary);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--radius-button);
  cursor: pointer;
  text-decoration: none;
}

.btn:hover,
.palette-btn:hover,
.outline button:hover {
  background: var(--color-secondary-hover);
}

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

.btn-danger {
  color: var(--color-error);
  border-color: #e7b3af;
  background: #fff;
}

.workspace {
  display: grid;
  grid-template-columns: 18.5rem 1fr;
  min-height: 0;
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px 16px;
  background: var(--color-white);
  border-right: 1px solid var(--color-border);
  overflow: auto;
}

.rail-head h2,
.palette h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 500;
}

.rail-head p,
.paper-hint {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: var(--font-min);
  line-height: 1.6;
}

.outline {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.outline button {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--color-text);
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.outline .lv-h2 { padding-left: 1rem; }
.outline .lv-h3 { padding-left: 1.8rem; color: var(--color-muted); }
.outline .is-empty { opacity: 0.55; }

.palette-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.palette-btn {
  border: 1px solid var(--color-border);
  background: var(--color-page);
  color: var(--color-text);
  padding: 12px 10px;
  border-radius: 12px;
  cursor: pointer;
  text-align: left;
}

.palette-btn small {
  display: block;
  color: var(--color-muted);
  font-size: var(--font-min);
}

.stage {
  overflow: auto;
  background: var(--color-page);
  padding: 24px 16px 48px;
}

.paper {
  width: min(52rem, 100%);
  margin: 0 auto;
  background: var(--color-white);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.07);
  min-height: calc(100% - 1rem);
  padding: 28px 24px 32px;
}

.canvas {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.block {
  position: relative;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 8px 8px 10px 28px;
}

.block:hover,
.block.is-active {
  border-color: var(--color-border);
  background: var(--color-page);
}

.drag-handle {
  position: absolute;
  left: 4px;
  top: 10px;
  width: 18px;
  color: var(--color-muted);
  cursor: grab;
  user-select: none;
  font-size: var(--font-min);
  letter-spacing: -0.1em;
}

.block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.kind {
  font-size: var(--font-min);
  letter-spacing: 0.04em;
  color: var(--color-muted);
}

.block-tools .btn {
  padding: 6px 10px;
  font-size: var(--font-min);
}

[contenteditable="true"] {
  min-height: 1.4em;
  outline: none;
  font-size: var(--font-min);
  line-height: 1.8;
}

[contenteditable="true"]:empty::before {
  content: attr(data-placeholder);
  color: #9a9a96;
}

.heading-h1 [contenteditable] { font-size: 32px; font-weight: 500; }
.heading-h2 [contenteditable] { font-size: 24px; font-weight: 500; }
.heading-h3 [contenteditable] { font-size: 20px; font-weight: 500; }

.special {
  border-left: 4px solid currentColor;
  padding: 12px 14px;
  border-radius: 0 12px 12px 0;
}

.block-memo .special {
  color: var(--memo-ink);
  background: var(--memo);
}

.block-note .special {
  color: var(--note-ink);
  background: var(--note);
}

.toggle {
  border: 1px solid var(--color-border);
  background: var(--color-page);
  padding: 12px;
  border-radius: 12px;
}

.block-switch .toggle { border-left: 4px solid var(--switch); }
.block-select .toggle { border-left: 4px solid var(--select); }

.toggle-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.toggle-bar input[type="text"] {
  min-width: 8rem;
  flex: 1;
  border: 1px solid var(--color-control-border);
  background: var(--color-white);
  border-radius: 12px;
  padding: 10px 12px;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.switch button {
  border: 1px solid var(--color-control-border);
  background: var(--color-white);
  color: var(--color-text);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.switch button.is-on {
  background: var(--color-primary);
  border-color: transparent;
  color: var(--color-white);
}

.toggle select {
  border: 1px solid var(--color-control-border);
  background: var(--color-white);
  border-radius: 12px;
  padding: 10px 12px;
}

.statusbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 10px 20px;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: var(--font-min);
}

.drop-mask {
  position: fixed;
  inset: 0;
  background: rgba(26, 29, 27, 0.42);
  color: var(--color-white);
  display: grid;
  place-items: center;
  font-size: 20px;
  z-index: 20;
}

.sheet {
  width: min(28rem, calc(100vw - 32px));
}

.sheet .dialog-description {
  text-align: left;
}

.variant-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.variant-list li {
  display: flex;
  gap: 8px;
}

.variant-list input {
  flex: 1;
  border: 1px solid var(--color-control-border);
  background: var(--color-white);
  color: var(--color-text);
  border-radius: 12px;
  padding: 10px 12px;
}

.btn:focus-visible,
.palette-btn:focus-visible,
.outline button:focus-visible {
  outline: 3px solid #8ab4ff;
  outline-offset: 2px;
}

.dragging {
  opacity: 0.45;
}

@media (max-width: 768px) {
  .topbar {
    grid-template-columns: 1fr;
    padding: 12px 16px;
  }

  .title-field .form-input {
    max-width: none;
  }

  .topbar-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
  }

  .topbar .button {
    width: 100%;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .rail {
    max-height: 14rem;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
    padding: 16px;
  }

  .stage {
    padding: 16px 12px 32px;
  }

  .paper {
    border-radius: 20px;
    padding: 20px 14px 24px;
  }

  .heading-h1 [contenteditable] { font-size: 26px; }
  .heading-h2 [contenteditable] { font-size: 22px; }
  .heading-h3 [contenteditable] { font-size: 18px; }

  .block-head {
    flex-wrap: wrap;
  }

  .toggle-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .statusbar {
    gap: 12px;
    padding: 10px 16px;
  }
}