:root {
  color-scheme: light;
  --bg: #f5f6fb;
  --surface: #ffffff;
  --text: #1f2430;
  --muted: #5c677d;
  --border: #e0e4ee;
  --primary: #2f6bff;
  --primary-hover: #2556cd;
  --danger: #cf3f57;
  --ok: #1f9d57;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  width: min(1050px, calc(100% - 40px));
  margin: 30px auto 60px;
}

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  width: min(1050px, calc(100% - 40px));
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-title {
  margin: 0;
  font-size: 1.1rem;
}

.muted {
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.card h3 {
  margin: 0 0 8px;
}

.btn {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  font-weight: 600;
  font-size: 14px;
  line-height: 1.2;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-danger {
  border-color: var(--danger);
  color: var(--danger);
}

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

.inline-form form {
  margin: 0;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fff;
}

label {
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
}

.flash {
  border: 1px solid var(--border);
  border-left-width: 4px;
  background: #fff;
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.flash.error {
  border-left-color: var(--danger);
}

.flash.success {
  border-left-color: var(--ok);
}

.tag-preview {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.code {
  background: #0f172a;
  color: #eef2ff;
  border-radius: 10px;
  padding: 10px 12px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
}

.allowed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.allowed-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
}

.stack {
  display: grid;
  gap: 14px;
}

.card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.card-link .card {
  height: 100%;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.card-link:hover .card {
  border-color: #c9d3ea;
  box-shadow: 0 4px 16px rgba(18, 34, 74, 0.08);
}

.guide-richtext {
  max-width: 680px;
}

.guide-richtext .narrow-line {
  width: 66%;
}