:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1a1d21;
  --muted: #5b6470;
  --border: #d7dbe0;
  --accent: #1b5ec9;
  --accent-text: #ffffff;
  --error: #b3261e;
  --row: #f5f6f8;
}

* {
  box-sizing: border-box;
}

html, body {
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 24px 64px;
}

h1, h2, h3 {
  color: var(--text);
  font-weight: 600;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.topbar nav {
  display: flex;
  gap: 20px;
}

.topbar .who {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--muted);
}

.topbar .who form.logout-form {
  display: contents;
}

.topbar .who button.link-button {
  font: inherit;
  color: var(--accent);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.topbar .who button.link-button:hover {
  text-decoration: underline;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 360px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.card label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  color: var(--muted);
}

input, select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
}

input:focus, select:focus, textarea:focus, button:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

button {
  font: inherit;
  color: var(--accent-text);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 9px 16px;
  cursor: pointer;
}

button:hover {
  background: #164ea3;
}

.error {
  color: var(--error);
  font-size: 14px;
}

.notice {
  color: var(--accent);
  font-size: 14px;
}

.inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 8px 0 0;
}

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

th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
}

tr:nth-child(even) td {
  background: var(--row);
}

.preview {
  width: 100%;
  height: 60vh;
  border: 1px solid #ccc;
}