:root {
  --navy: #1f4e5f;
  --blue: #2e75b6;
  --light: #eaf1f4;
  --border: #d8dfe3;
  --text: #2a2f33;
  --danger: #b3261e;
  --success: #1e7a34;
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, "Segoe UI", Arial, "PingFang TC", "Microsoft JhengHei", sans-serif;
  margin: 0; background: #f7f9fa; color: var(--text); font-size: 15px;
}
.topnav {
  display: flex; align-items: center; gap: 24px;
  background: var(--navy); color: #fff; padding: 12px 24px; flex-wrap: wrap;
}
.topnav .brand { font-weight: 700; font-size: 18px; margin-right: 12px; }
.topnav .links { display: flex; gap: 16px; flex: 1; flex-wrap: wrap; }
.topnav a { color: #fff; text-decoration: none; opacity: 0.9; }
.topnav a:hover { opacity: 1; text-decoration: underline; }
.topnav .user { font-size: 13px; opacity: 0.85; display: flex; gap: 12px; align-items: center; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
h1 { color: var(--navy); font-size: 24px; }
h2 { color: var(--navy); font-size: 19px; margin-top: 28px; }
h3 { color: var(--blue); font-size: 16px; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; background: #fff; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; font-size: 14px; }
th { background: var(--light); color: var(--navy); }
tr:nth-child(even) td { background: #fbfcfd; }
input[type=text], input[type=number], input[type=email], input[type=password], input[type=date], textarea, select {
  padding: 6px 8px; border: 1px solid var(--border); border-radius: 4px; font-size: 14px; width: 100%; max-width: 320px;
}
input[type=number] { max-width: 90px; }
textarea { max-width: 100%; min-height: 80px; }
label { font-weight: 600; display: block; margin: 10px 0 4px; }
button, .btn {
  background: var(--blue); color: #fff; border: none; padding: 8px 16px;
  border-radius: 4px; cursor: pointer; font-size: 14px; text-decoration: none; display: inline-block;
}
button:hover, .btn:hover { background: var(--navy); }
.btn-secondary { background: #6c7680; }
.flash { padding: 10px 14px; border-radius: 4px; margin-bottom: 16px; }
.flash-success { background: #e6f4ea; color: var(--success); border: 1px solid #b7dcc0; }
.flash-error { background: #fbe9e7; color: var(--danger); border: 1px solid #f0bab5; }
.card { background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 18px; margin: 14px 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.bilingual .en { font-weight: 600; }
.bilingual .zh { color: #666; font-size: 13px; }
.skill-row { display: flex; align-items: center; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid #f0f0f0; }
.score-summary { font-size: 15px; }
.score-summary b { color: var(--navy); }
.total-score { font-size: 28px; font-weight: 700; color: var(--navy); }
.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; background: var(--light); color: var(--navy); }
.login-box { max-width: 380px; margin: 80px auto; background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 32px; }
.muted { color: #888; font-size: 13px; }
.actions { margin-top: 16px; display: flex; gap: 10px; }
.module-card {
  display: block; background: #fff; border: 1px solid var(--border); border-radius: 8px;
  padding: 28px; text-decoration: none; color: var(--text);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}
.module-card:hover { box-shadow: 0 6px 18px rgba(31,78,95,0.12); transform: translateY(-2px); border-color: var(--blue); }
.module-card h2 { margin-top: 0; color: var(--navy); }
.module-card .module-stat { margin-bottom: 0; margin-top: 14px; }
.admin-links { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 8px; }
.admin-links a { color: var(--blue); text-decoration: none; font-size: 14px; }
.admin-links a:hover { text-decoration: underline; }
.section-row td { background: var(--light); color: var(--navy); font-weight: 700; font-size: 13px; padding: 6px 10px; }
.section-tracking td { background: #f0f0f0; color: #666; }
.section-deduction td { background: #fbeceb; color: var(--danger); }
.section-bonus td { background: #eaf6ed; color: var(--success); }
.current-month-col { background: #fffbe6; }
th.current-month-col { background: #fdf3c4; }
input.month-input[readonly] { background: #f4f4f4; color: #888; cursor: not-allowed; }
input[type=checkbox] { width: 18px; height: 18px; flex-shrink: 0; accent-color: var(--blue); }