:root {
  color-scheme: light dark;
  --fg: #1c1c1e;
  --bg: #f6f6f7;
  --panel-bg: #ffffff;
  --border: #d0d0d4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e6e8;
    --bg: #161618;
    --panel-bg: #202024;
    --border: #3a3a40;
  }
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.app {
  width: 90vw;
}

.app h1 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.home {
  text-align: center;
}

.welcome {
  font-size: 1.6rem;
  font-weight: 600;
  margin: 0;
}

.login-button {
  display: inline-block;
  padding: 0.65rem 1.4rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}

.login-button:hover {
  border-color: var(--fg);
}

.error {
  color: #c0392b;
}

.sheet-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  overflow-x: auto;
}

.sheet-row span {
  white-space: nowrap;
}

.sheet-row input {
  min-width: 4rem;
  padding: 0.4rem 0.6rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font: inherit;
}

.sheet-row button {
  white-space: nowrap;
  padding: 0.45rem 0.9rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.sheet-row button:hover {
  border-color: var(--fg);
}

.sheet-table {
  width: 100%;
  margin-top: 1rem;
  border-collapse: collapse;
}

.sheet-table th,
.sheet-table td {
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  text-align: left;
  font-size: 0.85rem;
}

.sheet-table th {
  background: var(--panel-bg);
  font-weight: 600;
}