:root{
  --bg:#f4f7fc; --surface:#ffffff; --surface-2:#eef3fb; --line:rgba(20,40,80,.10);
  --text:#16203a; --muted:#5c6a86; --primary:#2563eb; --primary-2:#0ea5e9; --accent:#8b5cf6;
  --grad:linear-gradient(120deg,#2563eb,#0ea5e9 50%,#8b5cf6);
  --ok:#16a34a; --err:#dc2626; --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Noto Sans TC",system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:var(--primary)}
input,select,textarea,button{font-family:inherit}

/* 登入頁 */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;
  background:radial-gradient(60% 60% at 50% 20%,rgba(37,99,235,.12),transparent 70%),var(--bg)}
.login-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--line);
  border-radius:18px;padding:40px 34px;box-shadow:0 18px 50px rgba(30,50,90,.12)}
.login-card .logo-mark{font-family:"Orbitron",sans-serif;font-weight:900;width:48px;height:48px;
  display:grid;place-items:center;border-radius:12px;background:var(--grad);color:#fff;margin:0 auto 18px;font-size:20px}
.login-card h1{text-align:center;font-size:21px;margin-bottom:4px}
.login-card .sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:26px}

/* 共用表單元件 */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;margin-bottom:7px;color:var(--muted)}
.field input,.field select,.field textarea{width:100%;padding:12px 14px;background:#fff;
  border:1px solid var(--line);border-radius:10px;color:var(--text);font-size:15px;transition:.2s}
.field input::placeholder,.field textarea::placeholder{color:#9aa6bd}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.field textarea{resize:vertical;min-height:80px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:11px 20px;border-radius:10px;font-weight:700;
  font-size:14px;cursor:pointer;border:0;transition:.2s;color:#fff;background:var(--grad);
  box-shadow:0 6px 16px rgba(37,99,235,.25)}
.btn:hover{transform:translateY(-2px)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-block{width:100%;justify-content:center}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--text);box-shadow:none}
.btn-ghost:hover{background:var(--surface-2)}
.btn-danger{background:#fff;color:var(--err);border:1px solid rgba(220,38,38,.35);box-shadow:none}
.btn-danger:hover{background:rgba(220,38,38,.06)}
.btn-sm{padding:7px 14px;font-size:13px}
.msg{font-size:14px;text-align:center;margin-top:14px;min-height:20px}
.msg.ok{color:var(--ok)} .msg.err{color:var(--err)}

/* 後台框架 */
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;box-shadow:0 2px 14px rgba(30,50,90,.05)}
.topbar .brand{display:flex;align-items:center;gap:12px;font-weight:700}
.topbar .logo-mark{font-family:"Orbitron",sans-serif;font-weight:900;width:38px;height:38px;display:grid;
  place-items:center;border-radius:10px;background:var(--grad);color:#fff;font-size:16px}
.topbar .right{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--muted)}
.layout{max-width:1100px;margin:0 auto;padding:28px}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px;border-bottom:1px solid var(--line);padding-bottom:14px}
.tab{padding:9px 18px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);
  cursor:pointer;font-size:14px;font-weight:500;transition:.2s}
.tab:hover{color:var(--text)}
.tab.active{background:rgba(37,99,235,.12);color:var(--primary);border-color:transparent}
.panel{display:none;animation:fade .3s ease}
.panel.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  margin-bottom:20px;box-shadow:0 6px 22px rgba(30,50,90,.05)}
.card h2{font-size:18px;margin-bottom:4px}
.card .hint{color:var(--muted);font-size:13px;margin-bottom:18px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.section-label{font-size:13px;font-weight:700;color:var(--primary);letter-spacing:1px;
  text-transform:uppercase;margin:24px 0 12px}

/* 列表 / 表格 */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--muted);font-weight:500;font-size:13px;white-space:nowrap}
tr:hover td{background:var(--surface-2)}
.tag{display:inline-block;font-size:12px;padding:2px 10px;border-radius:999px;background:rgba(37,99,235,.12);color:var(--primary)}
.empty{text-align:center;color:var(--muted);padding:40px}
.list-actions{display:flex;gap:8px;flex-wrap:wrap}

/* 動態列編輯器 */
.repeat-item{display:grid;gap:10px;background:var(--surface-2);border:1px solid var(--line);
  border-radius:12px;padding:16px;margin-bottom:12px;position:relative}
.repeat-item .del{position:absolute;top:10px;right:10px}
.repeat-cols{display:grid;gap:10px}

/* Modal */
.modal{position:fixed;inset:0;background:rgba(20,30,55,.45);display:none;place-items:center;z-index:100;padding:20px}
.modal.open{display:grid}
.modal-card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:28px;
  width:100%;max-width:520px;max-height:90vh;overflow:auto;box-shadow:0 24px 60px rgba(20,30,55,.25)}
.modal-card h3{margin-bottom:18px}
.modal-foot{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(120%);
  background:#fff;border:1px solid var(--line);padding:12px 22px;border-radius:999px;
  font-size:14px;transition:.35s;z-index:200;box-shadow:0 10px 30px rgba(30,50,90,.18)}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.ok{border-color:rgba(22,163,74,.5)} .toast.err{border-color:rgba(220,38,38,.5)}

@media(max-width:680px){
  .row2,.repeat-cols{grid-template-columns:1fr!important}
  .layout{padding:18px}
  .topbar{padding:12px 16px}
  table{font-size:13px}
  th,td{padding:8px 6px}
}