:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --border: #e2e5ec;
  --text: #1c1f26;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-text: #ffffff;
  --danger: #dc2626;
  --warn-bg: #fff7e6;
  --warn-text: #92660a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161c;
    --surface: #1d2028;
    --border: #2c303a;
    --text: #eef0f4;
    --text-muted: #9aa1b1;
    --primary: #4f8bff;
    --primary-text: #0b1220;
    --danger: #f26363;
    --warn-bg: #3a2d0f;
    --warn-text: #f0c869;
  }
}

* { box-sizing: border-box; }

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

.topbar {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.topbar h1 { margin: 0 0 4px; font-size: 1.2rem; }
.warn-note {
  margin: 0;
  font-size: 0.8rem;
  color: var(--warn-text);
  background: var(--warn-bg);
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 20px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 24px;
}
.panel h2 { margin-top: 0; font-size: 1.05rem; }
.panel h3 { font-size: 0.95rem; margin-top: 24px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-bottom: 8px;
}
th, td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-muted); font-weight: 600; }
td button { margin-right: 6px; }

.form-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 480px;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.form-grid input, .form-grid textarea {
  font: inherit;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 8px 0;
}
.checkbox-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.85rem;
  color: var(--text);
}

.form-actions { display: flex; gap: 8px; }

button {
  font: inherit;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
.form-actions button[type="submit"] {
  background: var(--primary);
  color: var(--primary-text);
  border-color: var(--primary);
}
.danger-btn { color: var(--danger); border-color: var(--danger); }

.error-note {
  color: var(--danger);
  background: var(--surface);
  border: 1px solid var(--danger);
  border-radius: 10px;
  padding: 10px 14px;
}