:root {
  --suc-bg: #ffffff;
  --suc-fg: #1a1a1a;
  --suc-border: #e0e0e0;
  --suc-muted: #6b7280;
  --suc-accent: #0e7490;
  --suc-error-bg: #fef2f2;
  --suc-error-fg: #b91c1c;
}

:root[data-theme="dark"] {
  --suc-bg: #111418;
  --suc-fg: #e5e7eb;
  --suc-border: #2d333b;
  --suc-muted: #9ca3af;
  --suc-accent: #22d3ee;
  --suc-error-bg: #2a1215;
  --suc-error-fg: #f87171;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--suc-bg);
  color: var(--suc-fg);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Noto Sans JP", sans-serif;
}

#root {
  min-height: 100vh;
}

.suc-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: 0.5rem;
  background: var(--suc-error-bg);
  color: var(--suc-error-fg);
  padding: 2rem;
  text-align: center;
}

.suc-error h2 {
  margin: 0;
  font-size: 1.1rem;
}

.suc-error p {
  margin: 0;
  font-size: 0.9rem;
}

/* markdown / docx 共通の文書スタイル */
.suc-document {
  max-width: 820px;
  margin: 0 auto;
  padding: 1.5rem;
  line-height: 1.7;
  word-wrap: break-word;
}

.suc-document table {
  border-collapse: collapse;
  margin: 1em 0;
}

.suc-document th,
.suc-document td {
  border: 1px solid var(--suc-border);
  padding: 0.35em 0.7em;
}

.suc-document img {
  max-width: 100%;
}

.suc-document pre {
  background: color-mix(in srgb, var(--suc-fg) 6%, var(--suc-bg));
  padding: 0.8em;
  border-radius: 6px;
  overflow-x: auto;
}

/* スプレッドシート */
.suc-sheet-tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--suc-border);
  position: sticky;
  top: 0;
  background: var(--suc-bg);
}

.suc-sheet-tabs button {
  border: 1px solid var(--suc-border);
  background: transparent;
  color: var(--suc-fg);
  border-radius: 6px;
  padding: 0.2rem 0.7rem;
  cursor: pointer;
  font-size: 0.85rem;
}

.suc-sheet-tabs button[aria-selected="true"] {
  border-color: var(--suc-accent);
  color: var(--suc-accent);
}

.suc-grid {
  overflow: auto;
}

.suc-grid table {
  border-collapse: collapse;
  font-size: 0.85rem;
  white-space: nowrap;
}

.suc-grid th {
  background: color-mix(in srgb, var(--suc-fg) 7%, var(--suc-bg));
  position: sticky;
  top: 0;
  font-weight: 600;
}

.suc-grid th,
.suc-grid td {
  border: 1px solid var(--suc-border);
  padding: 0.25em 0.6em;
  max-width: 24rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.suc-grid .suc-rownum {
  background: color-mix(in srgb, var(--suc-fg) 7%, var(--suc-bg));
  color: var(--suc-muted);
  text-align: right;
  user-select: none;
}

/* SVG ビュー */
.suc-svg {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.suc-svg svg {
  max-width: 100%;
  max-height: 90vh;
  height: auto;
}

/* HTML 用 nested iframe */
.suc-html-frame {
  display: block;
  width: 100%;
  height: 100vh;
  border: 0;
}

/* plain text */
.suc-plain {
  margin: 0;
  padding: 1.5rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}