:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --border: #d8dee6;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --error: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.wrap { max-width: 900px; margin: 0 auto; padding: 24px 16px 64px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }

.stack { display: flex; flex-direction: column; gap: 12px; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }

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

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

button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 500;
}
button:hover { background: var(--accent-dark); }
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
button.ghost:hover { color: var(--text); border-color: var(--text); }
button.active { background: var(--accent-dark); }

#login-view { max-width: 380px; margin: 8vh auto 0; }
#login-view button { margin-top: 4px; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.topbar nav { display: flex; gap: 8px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.result {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-radius: 8px;
  padding: 14px 16px;
}
.result strong { font-size: 24px; }
.result .muted { margin-left: 8px; font-size: 13px; }

.error { color: var(--error); font-size: 13px; margin: 8px 0 0; }
.muted { color: var(--muted); font-size: 13px; }

.rows { width: 100%; border-collapse: collapse; font-size: 14px; }
.rows th, .rows td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.rows th { color: var(--muted); font-weight: 500; font-size: 12px; }

.list { margin: 0 0 12px; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 6px; }
.list li { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }

.row-form { display: flex; gap: 8px; flex-wrap: wrap; }
.row-form input, .row-form select { flex: 1; min-width: 120px; }