:root {
  color-scheme: light;
  --bg: #f5f5f5;
  --panel: #ffffff;
  --panel-strong: #ffffff;
  --text: #202020;
  --muted: #606060;
  --line: #d4d4d4;
  --accent: #262626;
  --accent-strong: #171717;
  --accent-soft: #e8e8e8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  padding: 24px 24px 18px;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.brand h1,
.hero h2 {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-copy,
#page-description {
  color: var(--muted);
  line-height: 1.7;
}

.brand-copy {
  margin: 12px 0 0;
}

.tool-nav {
  display: grid;
  gap: 6px;
  margin-top: 20px;
  align-content: start;
}

.external-nav {
  display: grid;
  gap: 6px;
  margin-top: 20px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.external-nav-title {
  margin: 0 14px 4px;
  color: var(--muted);
  font-size: 0.82rem;
}

.external-link {
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  line-height: 1.35;
}

.external-link:hover {
  background: var(--accent-soft);
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.version-value {
  margin: 0;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.mobile-nav {
  display: none;
  margin-top: 28px;
  color: var(--muted);
}

.mobile-nav span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.94rem;
}

.tool-select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  background: var(--panel-strong);
  color: var(--text);
}

.nav-link,
.primary-button,
.secondary-button,
.copy-button {
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 160ms ease;
}

.nav-link {
  min-height: 0;
  padding: 10px 14px;
  text-align: left;
  background: transparent;
  color: var(--text);
  line-height: 1.35;
}

.nav-link:hover,
.secondary-button:hover:not(:disabled),
.copy-button:hover:not(:disabled) {
  background: var(--accent-soft);
}

.primary-button:hover:not(:disabled) {
  background: #404040;
}

:where(a, button, input, textarea, select):focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.nav-link.is-active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.content {
  padding: 40px 28px 56px;
}

.hero {
  max-width: 760px;
}

.tool-root {
  margin-top: 28px;
}

.panel {
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel > .block-field + .form-row,
.panel > .status-box + .block-field {
  margin-top: 16px;
}

.form-row {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

.field {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.field span {
  font-size: 0.94rem;
  color: var(--muted);
}

.block-field {
  width: 100%;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  background: var(--panel-strong);
  color: var(--text);
}

textarea {
  resize: vertical;
  line-height: 1.6;
}

.primary-button,
.secondary-button,
.copy-button {
  padding: 14px 18px;
}

.primary-button {
  background: var(--accent);
  color: #fff;
}

.secondary-button,
.copy-button {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--accent-strong);
}

.primary-button:disabled,
.secondary-button:disabled,
.copy-button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
}

.hint-list {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.hint-list p {
  margin: 4px 0;
}

.status-box {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 6px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--muted);
}

.table-wrap {
  margin-top: 16px;
  overflow-x: auto;
}

.result-table {
  width: 100%;
  border-collapse: collapse;
}

.result-table th,
.result-table td {
  padding: 14px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

.result-table th {
  color: var(--muted);
  font-weight: 600;
}

.value-pre {
  white-space: pre-wrap;
  word-break: break-word;
}

.talk-panel {
  display: grid;
  gap: 18px;
}

.talk-toolbar {
  display: flex;
  gap: 12px;
  align-items: start;
  justify-content: space-between;
  flex-wrap: wrap;
}

.talk-toolbar .status-box {
  flex: 1 1 320px;
  margin-top: 0;
}

.talk-list {
  display: grid;
  gap: 14px;
  max-height: 480px;
  overflow-y: auto;
  padding: 8px 4px 8px 16px;
  border-radius: 6px;
  background: var(--bg);
}

.talk-empty {
  padding: 20px;
  border-radius: 6px;
  color: var(--muted);
  background: var(--panel);
  border: 1px dashed var(--line);
}

.talk-message {
  display: grid;
  justify-items: end;
}

.talk-bubble {
  max-width: min(100%, 520px);
  padding: 14px 16px;
  border-radius: 8px 8px 2px 8px;
  background: #e5e5e5;
  color: var(--text);
  line-height: 1.7;
  white-space: pre-wrap;
}

.talk-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.84rem;
}

.talk-delete {
  border: none;
  background: transparent;
  color: var(--accent-strong);
  cursor: pointer;
  padding: 0;
}

.talk-compose {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.talk-compose-actions {
  display: flex;
  justify-content: end;
}

.clipboard-panel {
  display: grid;
  gap: 18px;
}

.clipboard-list {
  display: grid;
  gap: 10px;
}

.clipboard-card {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border-radius: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.clipboard-card.is-dragging {
  opacity: 0.65;
}

.clipboard-card.is-drop-target {
  outline: 2px solid var(--accent);
}

.clipboard-handle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  color: var(--muted);
  cursor: grab;
  letter-spacing: 0.08em;
}

.clipboard-text {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.65;
}

.clipboard-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: end;
  color: var(--muted);
  font-size: 0.84rem;
}

.clipboard-delete {
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  padding: 0;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav {
    display: block;
  }

  .tool-nav {
    display: none;
  }

  .content {
    padding: 28px 16px 40px;
  }

  .panel {
    padding: 18px;
    border-radius: 8px;
  }

  .talk-list {
    max-height: 360px;
    padding-left: 8px;
  }

  .clipboard-card {
    grid-template-columns: 24px 1fr;
  }

  .clipboard-meta {
    grid-column: 1 / -1;
    justify-content: space-between;
  }
}