:root {
  --navy: #1F3864; --navy-deep: #16294A; --ink: #1F2A3C; --gold: #C9A227; --gold-soft: #F6EED6;
  --paper: #F6F7F9; --white: #fff; --line: #DCE1E8; --line-soft: #ECEFF3; --muted: #5F6B7A; --danger: #B03A2E; --ok: #2E7D4F;
  --font: "Microsoft JhengHei", "微軟正黑體", "PingFang TC", "PingFang SC", "Noto Sans TC", "Noto Sans SC", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: var(--font); font-size: 15px; line-height: 1.65; color: var(--ink); background: var(--paper); -webkit-font-smoothing: antialiased; }
a { color: var(--navy); text-decoration: none; } a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: 24px; line-height: 1.3; }
h2 { font-size: 17px; color: var(--navy); border-bottom: 1.5px solid var(--navy); padding-bottom: 6px; margin-bottom: 14px; }
h3 { font-size: 15px; color: var(--navy); }
p { margin: 0 0 8px; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

.top { background: var(--navy); color: #fff; }
.top .in { max-width: 960px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; gap: 14px; }
.top .brand { font-size: 17px; font-weight: 600; letter-spacing: .3px; flex: 1; }
.top .brand small { display: block; font-size: 12px; font-weight: 400; opacity: .75; }
.top .who { font-size: 13px; opacity: .85; text-align: right; }
.top button, .top a.lnk { background: none; border: 1px solid rgba(255,255,255,.35); color: #fff; padding: 4px 10px; border-radius: 3px; cursor: pointer; font-size: 13px; }
.top button:hover, .top a.lnk:hover { background: rgba(255,255,255,.1); text-decoration: none; }
.wrap { max-width: 960px; margin: 0 auto; padding: 24px 20px 70px; }
.section { margin-bottom: 30px; }
.card { background: var(--white); border: 1px solid var(--line); padding: 18px 20px; }
.card + .card { margin-top: 12px; }
.hero { background: var(--white); border: 1px solid var(--line); border-top: 4px solid var(--navy); padding: 22px 24px; margin-bottom: 26px; }
.hero .meta { color: var(--muted); font-size: 14px; margin-top: 4px; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 14px; font-size: 14.5px; }
.kv dt { color: var(--muted); } .kv dd { margin: 0; white-space: pre-wrap; }
.kv dd:empty::before { content: '—'; color: var(--line); }
.muted { color: var(--muted); } .small { font-size: 13px; } .pre { white-space: pre-wrap; }
.empty { color: var(--muted); padding: 10px 0; }
.btn { border: 1px solid var(--navy); background: var(--navy); color: #fff; padding: 8px 16px; border-radius: 3px; cursor: pointer; font-size: 14px; }
.btn:hover { background: var(--navy-deep); }
.btn.ghost { background: transparent; color: var(--navy); } .btn.ghost:hover { background: rgba(31,56,100,.06); }
.btn.small { padding: 3px 10px; font-size: 13px; }
.btn.danger { border-color: var(--danger); color: var(--danger); background: transparent; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 2px; border: 1px solid var(--line); background: #fff; white-space: nowrap; }
.chip.on { background: var(--gold-soft); border-color: var(--gold); color: #6E5510; }
.chip.off { color: var(--muted); }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-box { width: 100%; max-width: 380px; background: var(--white); border-top: 4px solid var(--navy); padding: 30px 32px 28px; }
.login-box b { display: block; font-size: 21px; color: var(--navy); }
.login-box .tag { color: var(--muted); font-size: 13.5px; margin-bottom: 22px; }
.login-box .lang { text-align: right; margin-top: 14px; font-size: 13px; }

/* forms */
input[type=text], input[type=number], input[type=date], input[type=password], select, textarea { width: 100%; border: 1px solid var(--line); background: #fff; padding: 9px 10px; border-radius: 3px; font-size: 15px; }
textarea { min-height: 80px; resize: vertical; }
label.f { display: block; font-size: 13px; color: var(--muted); margin-bottom: 3px; }
.field { margin-bottom: 12px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-grid .wide { grid-column: 1 / -1; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }
.err { color: var(--danger); font-size: 13.5px; margin: 6px 0 0; min-height: 18px; }
.dlg { border: 0; padding: 0; width: min(640px, 94vw); max-height: 92vh; background: var(--white); border-top: 4px solid var(--navy); }
.dlg::backdrop { background: rgba(22,41,74,.45); }
.dlg form { padding: 22px 24px 20px; overflow-y: auto; max-height: 92vh; }
.dlg h2 { border-bottom: 0; margin-bottom: 14px; font-size: 18px; }
.dlg .foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 10px; padding-top: 12px; border-top: 1px solid var(--line-soft); }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 9px 16px; border-radius: 3px; font-size: 14px; z-index: 50; }

/* timetable */
.week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.week .day { background: var(--white); border: 1px solid var(--line); min-height: 90px; padding: 8px 9px; }
.week .day.today { border-color: var(--gold); box-shadow: inset 0 3px 0 var(--gold); }
.week .day b { display: block; font-size: 13px; color: var(--navy); margin-bottom: 6px; }
.week .slot { font-size: 13px; padding: 4px 0; border-top: 1px solid var(--line-soft); }
.week .slot .t { color: var(--muted); font-size: 12px; display: block; }
.week .slot .plan { color: var(--muted); font-size: 12px; }
@media (max-width: 700px) { .week { grid-template-columns: 1fr; } .week .day { min-height: 0; } .week .day:empty { display: none; } }

/* progress cards */
.prog { background: var(--white); border: 1px solid var(--line); border-left: 4px solid var(--navy); padding: 16px 20px; }
.prog + .prog { margin-top: 12px; }
.prog .head { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; margin-bottom: 8px; }
.prog .head .d { color: var(--muted); font-size: 13.5px; }
.prog .head b { font-size: 16px; }
.prog dl { display: grid; grid-template-columns: 76px 1fr; gap: 4px 12px; margin: 0; font-size: 14.5px; }
.prog dt { color: var(--muted); } .prog dd { margin: 0; white-space: pre-wrap; }

/* lists */
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line-soft); align-items: baseline; }
.list li:last-child { border-bottom: 0; }
.list li .d { color: var(--muted); font-size: 13.5px; white-space: nowrap; min-width: 88px; }
.list li .x { margin-left: auto; }
.stu { display: block; background: var(--white); border: 1px solid var(--line); padding: 16px 20px; color: inherit; }
.stu:hover { border-color: var(--navy); text-decoration: none; }
.stu + .stu { margin-top: 10px; }
.stu b { font-size: 17px; color: var(--navy); } .stu span { display: block; color: var(--muted); font-size: 13.5px; margin-top: 2px; }
.foot { color: var(--muted); font-size: 12.5px; margin-top: 40px; text-align: center; }