/* 太極扇 · 太極舞報名系統 — deep blue / teal, black & white */
:root {
  --ink: #0f1d24;
  --navy: #0f3d4c;
  --teal: #16707a;
  --teal-2: #1f8f95;
  --teal-soft: #e6f3f3;
  --line: #dce6e8;
  --bg: #f5f8f8;
  --card: #ffffff;
  --muted: #5b6b70;
  --danger: #b3261e;
  --warn-bg: #fff6e0;
  --warn: #8a5a00;
  --ok-bg: #e7f5ee;
  --ok: #1e6b45;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(15, 61, 76, 0.08);
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", "Heiti TC", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); line-height: 1.7; font-size: 1.05rem; min-height: 100vh;
  background: radial-gradient(circle at 100% 0, #e3f1f2 0, transparent 40%), radial-gradient(circle at 0 100%, #e8eef4 0, transparent 38%), var(--bg);
}
a { color: var(--teal); }
a:hover { color: var(--navy); }
.wrap { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: 1.5rem 0 3.5rem; }
.wrap.narrow { width: min(820px, calc(100% - 2rem)); }
.site-bar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .75rem; font-size: .95rem; margin-bottom: 1rem; }
.site-bar a { color: var(--navy); text-decoration: none; font-weight: 600; }
.site-bar a:hover { text-decoration: underline; }

.hero { text-align: center; margin: .5rem 0 1.6rem; }
.hero .tc-icon { display: block; margin: 0 auto .6rem; filter: drop-shadow(0 4px 10px rgba(15,61,76,.18)); }
.hero .org-title {
  margin: 0 0 .15rem; font-size: calc(clamp(1.55rem, 4vw, 2.1rem) + 8px); font-weight: 700; color: var(--navy);
  font-family: DFKai-SB, "標楷體", "BiauKai", "Kaiti TC", "Microsoft JhengHei", serif; letter-spacing: .08em; line-height: 1.3;
}
.hero h1 {
  margin: 0 0 .3rem; font-size: clamp(1.5rem, 4vw, 2.05rem); color: var(--ink); line-height: 1.35;
  font-family: DFKai-SB, "標楷體", "BiauKai", "Kaiti TC", "Microsoft JhengHei", serif;
}
.hero .subtitle { margin: 0; color: var(--teal); font-weight: 600; letter-spacing: .04em; }
.hero .intro { margin: .9rem auto 0; max-width: 40rem; color: var(--muted); }
.en { color: var(--muted); font-size: .92em; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.4rem 1.5rem; margin-bottom: 1.1rem; }
.card h2 { margin: 0 0 1rem; font-size: 1.18rem; color: var(--navy); padding-bottom: .55rem; border-bottom: 2px solid var(--teal-soft); }
.card h3 { font-size: 1.05rem; color: var(--navy); margin: .6rem 0 .5rem; }
.field { margin-bottom: 1.15rem; }
.field:last-child { margin-bottom: 0; }
.q { display: block; font-weight: 700; margin-bottom: .4rem; color: var(--ink); }
.sub { display: block; font-size: .92rem; color: var(--muted); margin: .5rem 0 .3rem; font-weight: 600; }
.req { color: var(--danger); font-weight: 700; }
.req-note { text-align: right; font-size: .9rem; color: var(--muted); margin: 0 0 .5rem; }
.hint { margin: .35rem 0 0; font-size: .88rem; color: var(--muted); }
.small { font-size: .9rem; }
.muted { color: var(--muted); }
.mono { font-variant-numeric: tabular-nums; }
.nowrap { white-space: nowrap; }

input[type=text], input[type=email], input[type=tel], input[type=number], input[type=date], input[type=password], input[type=search], select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: #fff; border: 1.5px solid #c9d7da; border-radius: 10px;
  padding: .7rem .85rem; min-height: 48px; transition: border-color .15s, box-shadow .15s;
}
textarea { min-height: 96px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(22,112,122,.15); }
.has-err input, .has-err select, .has-err textarea, .has-err .pill { border-color: var(--danger); }
.err { color: var(--danger); font-size: .92rem; font-weight: 600; margin: .35rem 0 0; }

.row-2 { display: grid; gap: 0 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .row-2 { grid-template-columns: 1fr 1fr; } }

.choices { display: flex; flex-wrap: wrap; gap: .55rem; }
.pill { display: inline-flex; align-items: center; gap: .45rem; padding: .55rem .9rem; border: 1.5px solid #c9d7da; border-radius: 999px; cursor: pointer; background: #fff; min-height: 46px; user-select: none; }
.pill:hover { border-color: var(--teal); }
.pill input { width: 1.15rem; height: 1.15rem; accent-color: var(--teal); margin: 0; }
.pill:has(input:checked) { background: var(--teal-soft); border-color: var(--teal); color: var(--navy); font-weight: 600; }
.agree { display: flex; gap: .6rem; align-items: flex-start; cursor: pointer; }
.agree input { width: 1.3rem; height: 1.3rem; margin-top: .25rem; accent-color: var(--teal); flex: none; }
.terms { background: var(--teal-soft); border-radius: 10px; padding: .75rem 1rem; margin-bottom: 1rem; }
.terms summary { cursor: pointer; font-weight: 700; color: var(--navy); }
.terms ol { padding-left: 1.25rem; margin: .6rem 0; }
.terms li { margin-bottom: .35rem; font-size: .95rem; }
.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }

.actions { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; margin: 1.3rem 0 .5rem; }
.actions.left { justify-content: flex-start; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .35rem; font: inherit; font-weight: 700; border-radius: 999px; padding: .8rem 1.6rem; min-height: 48px; border: 1.5px solid transparent; cursor: pointer; text-decoration: none; line-height: 1.2; }
.btn.sm { padding: .5rem 1rem; min-height: 40px; font-size: .95rem; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--teal); color: #fff; }
.btn-secondary { background: #fff; color: var(--navy); border-color: #b9ccd0; }
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); }
.btn-danger { background: #fff; color: var(--danger); border-color: #e2b4b0; }
.btn-danger:hover { background: var(--danger); color: #fff; }
@media (max-width: 560px) { .reg-form .actions .btn { width: 100%; } }

.notice { border-radius: 10px; padding: .85rem 1rem; margin: 0 0 1rem; border: 1px solid transparent; }
.notice p { margin: .2rem 0; }
.notice.error { background: #fdecea; border-color: #f3c3be; color: var(--danger); font-weight: 600; }
.notice.ok { background: var(--ok-bg); border-color: #bfe3cf; color: var(--ok); font-weight: 600; }
.notice.warn { background: var(--warn-bg); border-color: #f0d9a0; color: var(--warn); text-align: left; }

.thanks { text-align: center; padding: 2rem 1.5rem; }
.thanks h2 { border: 0; font-size: 1.35rem; color: var(--ink); }
.thanks-mark { width: 64px; height: 64px; border-radius: 50%; background: var(--teal); color: #fff; font-size: 2rem; line-height: 64px; margin: 0 auto 1rem; }
.reg-no { margin: 1.2rem 0 .3rem; }
.reg-no strong { display: inline-block; margin-top: .3rem; font-size: 1.6rem; letter-spacing: .08em; color: var(--navy); background: var(--teal-soft); padding: .3rem 1rem; border-radius: 10px; font-variant-numeric: tabular-nums; }

.footer-note { text-align: center; color: var(--muted); font-size: .9rem; margin-top: 2rem; }

/* ---------- admin ---------- */
.admin-nav { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin: -0.5rem 0 1.2rem; padding: .5rem; background: #fff; border: 1px solid var(--line); border-radius: 999px; }
.admin-nav a { text-decoration: none; padding: .45rem 1rem; border-radius: 999px; color: var(--navy); font-weight: 600; }
.admin-nav a.active, .admin-nav a:hover { background: var(--navy); color: #fff; }
.admin-nav form { margin-left: auto; }
form.inline { display: inline; }
.linklike { background: none; border: 0; font: inherit; color: var(--muted); cursor: pointer; padding: .45rem 1rem; }
.linklike:hover { color: var(--danger); }
.login-box { max-width: 460px; margin: 0 auto; }
.confirm-box { max-width: 640px; margin: 0 auto; }
.danger-text { color: var(--danger); font-weight: 600; }

.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: .8rem; margin-bottom: .5rem; }
@media (min-width: 820px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--navy); color: #fff; border-radius: var(--radius); padding: 1rem 1.1rem; display: flex; flex-direction: column; }
.stat:nth-child(2), .stat:nth-child(3) { background: var(--teal); }
.stat .num { font-size: 1.9rem; font-weight: 800; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat .num small { font-size: .95rem; font-weight: 600; opacity: .8; }
.stat .lbl { font-size: .92rem; opacity: .92; margin-top: .25rem; }

.filters { display: grid; gap: .6rem 1rem; grid-template-columns: 1fr 1fr; align-items: end; }
.filters .f-q { grid-column: 1 / -1; }
.filters .chk { display: flex; gap: .4rem; align-items: center; font-size: .95rem; grid-column: 1 / -1; }
.filters .f-actions { display: flex; gap: .5rem; grid-column: 1 / -1; flex-wrap: wrap; }
@media (min-width: 900px) {
  .filters { grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr; }
  .filters .f-q { grid-column: auto; }
  .filters .chk { grid-column: 1 / 3; }
  .filters .f-actions { grid-column: 3 / -1; justify-content: flex-end; }
}
.export-row { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-top: 1rem; padding-top: .9rem; border-top: 1px solid var(--line); }
.export-row .small { margin-right: auto; color: var(--muted); }

.table-card { padding: .6rem; }
.table-scroll { overflow-x: auto; }
table.reg-table { width: 100%; border-collapse: collapse; font-size: .97rem; }
.reg-table th { text-align: left; background: #f0f5f6; color: var(--navy); font-weight: 700; padding: .65rem .7rem; white-space: nowrap; border-bottom: 2px solid var(--line); }
.reg-table td { padding: .65rem .7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.reg-table tr:hover td { background: #f8fbfb; }
.reg-table tr.is-archived td { opacity: .6; }
.reg-table a { text-decoration: none; }
@media (max-width: 760px) {
  .reg-table thead { display: none; }
  .reg-table tr { display: block; border: 1px solid var(--line); border-radius: 12px; margin: .6rem .2rem; padding: .4rem .2rem; }
  .reg-table td { display: flex; gap: .8rem; border: 0; padding: .3rem .7rem; }
  .reg-table td::before { content: attr(data-l); flex: 0 0 5.2rem; color: var(--muted); font-size: .88rem; }
}
.badge { display: inline-block; padding: .12rem .6rem; border-radius: 999px; font-size: .85rem; font-weight: 700; margin: .1rem .15rem .1rem 0; white-space: nowrap; }
.badge.course { background: var(--teal-soft); color: var(--navy); }
.badge.course.wait { background: var(--warn-bg); color: var(--warn); }
.st-pending { background: #fff3cd; color: #7a5a00; }
.st-confirmed { background: var(--ok-bg); color: var(--ok); }
.st-declined { background: #fdecea; color: var(--danger); }
.st-cancelled { background: #eceff1; color: #546e7a; }
.st-archived { background: #263238; color: #fff; }
.yes { color: var(--ok); font-weight: 700; }

.detail-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem; }
.detail-head h2 { border: 0; padding: 0; margin: 0 0 .3rem; }
dl.detail { display: grid; grid-template-columns: 1fr; margin: .8rem 0 0; }
dl.detail dt { font-weight: 700; color: var(--muted); font-size: .9rem; padding-top: .55rem; }
dl.detail dd { margin: 0; padding: .1rem 0 .55rem; border-bottom: 1px solid var(--line); word-break: break-word; }
@media (min-width: 700px) {
  dl.detail { grid-template-columns: 12rem 1fr; }
  dl.detail dt, dl.detail dd { padding: .6rem .4rem; border-bottom: 1px solid var(--line); }
}
.grid-2 { display: grid; gap: 0 1.1rem; grid-template-columns: 1fr; }
@media (min-width: 900px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.inline-form { margin-bottom: 1rem; }
.inline-form .inline { display: inline-block; margin: .2rem .3rem .2rem 0; }
.row-inline { display: flex; gap: .5rem; }
.row-inline select { flex: 1; }
hr { border: 0; border-top: 1px solid var(--line); margin: 1.2rem 0; }
ul.notes { list-style: none; padding: 0; margin: 1rem 0 0; }
ul.notes li { border-left: 3px solid var(--teal); background: #f7fafa; padding: .5rem .8rem; margin-bottom: .5rem; border-radius: 0 8px 8px 0; }
ul.notes li.sys { border-left-color: #b0bec5; color: var(--muted); font-size: .93rem; }
ul.notes .t { display: block; font-size: .82rem; color: var(--muted); }
textarea + .btn, textarea + button { margin-top: .6rem; }
.site-bar { align-items: center; }
.site-bar a.admin-link {
  margin-left: auto; font-size: .85rem; font-weight: 600; color: var(--muted); text-decoration: none;
  padding: .3rem .85rem; border: 1px solid #c9d7da; border-radius: 999px; background: rgba(255,255,255,.7); white-space: nowrap; line-height: 1.4;
}
.site-bar a.admin-link:hover { color: #fff; background: var(--navy); border-color: var(--navy); text-decoration: none; }
.acc-reset { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }
.acc-reset input { width: auto; flex: 1 1 8rem; min-height: 40px; padding: .45rem .7rem; }
.acc-add { margin-top: .5rem; }
@media (max-width: 760px) { .acc-table td { flex-wrap: wrap; } .acc-reset { width: 100%; } }
.privacy-note { text-align: center; color: var(--muted); font-size: .9rem; margin: .4rem 0 0; }