:root {
  color-scheme: light;
  --bg: #f6f7f3;
  --panel: #ffffff;
  --ink: #17211d;
  --muted: #68746e;
  --line: #dfe5dd;
  --primary: #246b52;
  --primary-strong: #164a38;
  --accent: #c36b3d;
  --danger: #b33b3b;
  --shadow: 0 10px 28px rgba(25, 38, 31, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px max(20px, calc((100vw - 1040px) / 2));
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  color: var(--primary-strong);
  font-weight: 800;
  white-space: nowrap;
}

.nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
}

.nav a {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 15px;
  white-space: nowrap;
}

.nav a.active,
.nav a:hover {
  background: #edf2ec;
  color: var(--primary-strong);
}

.container {
  width: min(1040px, 100%);
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.page-title { margin-bottom: 22px; }

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 { font-size: 32px; }
h2 { font-size: 20px; }

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.metric,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.metric { padding: 18px; }

.metric span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 26px;
}

.panel {
  padding: 20px;
  margin-top: 18px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.section-head a {
  color: var(--primary);
  font-weight: 700;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

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

.form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

textarea { resize: vertical; }

.month-picker {
  display: flex;
  align-items: end;
  gap: 10px;
  margin-bottom: 18px;
}

.month-picker label { width: min(280px, 100%); }

.record-list {
  display: grid;
  gap: 10px;
}

.record-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.record-item span,
small {
  display: block;
  color: var(--muted);
}

.empty {
  margin: 12px 0 0;
  color: var(--muted);
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 14px;
}

.link-button {
  border: 0;
  background: transparent;
  color: var(--danger);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.messages {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.message {
  margin: 0;
  padding: 12px 14px;
  border-radius: 8px;
  background: #eef6f1;
  color: var(--primary-strong);
  font-weight: 700;
}

.message.error {
  background: #fff0f0;
  color: var(--danger);
}

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 16px;
  }

  .nav {
    width: 100%;
    padding-bottom: 2px;
  }

  .container { padding: 22px 16px 40px; }
  h1 { font-size: 28px; }
  .summary-grid { grid-template-columns: 1fr; }
  .metric strong { font-size: 24px; }
  .panel { padding: 16px; }

  .month-picker {
    align-items: stretch;
    flex-direction: column;
  }

  .button,
  .month-picker label {
    width: 100%;
  }

  .record-item {
    align-items: flex-start;
    flex-direction: column;
  }
}