:root {
  --primary: #5865f2;         /* Discord blurple */
  --primary-dark: #4752c4;
  --primary-light: #eaecfd;
  --accent: #eb459e;          /* Discord fuchsia */
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2d3d;
  --muted: #6b7a8c;
  --border: #dfe6ec;
  --danger: #c0392b;
  --danger-bg: #fdecea;
  --ok: #1e8e3e;
  --ok-bg: #e6f4ea;
  --warn: #b7791f;
  --warn-bg: #fdf3e0;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(16, 36, 54, 0.08);
  --sidebar: #2b2d42;
  --sidebar-deep: #23243a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.55;
}
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--primary); text-decoration: none; }

/* ---- 版面 ---- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; background: var(--sidebar); color: #cdd0e0; flex-shrink: 0;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.sidebar .brand {
  padding: 18px 16px 14px; color: #fff; font-size: 17px; font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.sidebar .brand small { display: block; font-size: 11px; font-weight: 400; color: #9aa0c9; margin-top: 2px; }
.sidebar .brand .dot { display:inline-block; width:8px; height:8px; border-radius:50%; margin-right:6px; background:#f04747; vertical-align:middle; }
.sidebar .brand .dot.on { background:#3ba55d; }
.nav { flex: 1; padding: 8px 0; }
.nav a {
  display: block; padding: 10px 18px; color: #cdd0e0; font-size: 14px;
  border-left: 3px solid transparent;
}
.nav a:hover { background: rgba(255,255,255,0.06); }
.nav a.active { background: rgba(255,255,255,0.1); color: #fff; border-left-color: var(--primary); }
.nav .nav-group { padding: 12px 18px 4px; font-size: 11px; color: #7d82ad; letter-spacing: 1px; }
.sidebar .user-box { padding: 12px 16px; border-top: 1px solid rgba(255,255,255,0.12); font-size: 13px; }
.sidebar .user-box .name { color: #fff; font-weight: 600; }
.sidebar .user-box button {
  margin-top: 8px; width: 100%; padding: 6px; background: transparent; color: #cdd0e0;
  border: 1px solid rgba(255,255,255,0.3); border-radius: 6px; cursor: pointer; font-size: 13px;
}
.sidebar .user-box button:hover { background: rgba(255,255,255,0.08); }

.main { flex: 1; min-width: 0; padding: 20px 24px 60px; }
.page-title { font-size: 21px; font-weight: 700; margin-bottom: 4px; }
.page-sub { color: var(--muted); font-size: 13px; margin-bottom: 18px; }

/* 手機版頂欄 */
.topbar { display: none; }
@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .sidebar { position: fixed; left: -240px; z-index: 60; transition: left 0.2s; height: 100vh; }
  .sidebar.open { left: 0; box-shadow: 4px 0 20px rgba(0,0,0,0.3); }
  .topbar {
    display: flex; align-items: center; gap: 12px; background: var(--sidebar); color: #fff;
    padding: 12px 16px; position: sticky; top: 0; z-index: 50;
  }
  .topbar .menu-btn { background: none; border: 1px solid rgba(255,255,255,0.4); color: #fff; border-radius: 6px; padding: 4px 10px; cursor: pointer; }
  .main { padding: 16px 14px 60px; }
  .backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 55; }
  .backdrop.show { display: block; }
}

/* ---- 卡片、統計 ---- */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px; margin-bottom: 16px; }
.card h3 { font-size: 15px; margin-bottom: 12px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px 16px; }
.stat .num { font-size: 26px; font-weight: 700; color: var(--primary-dark); }
.stat .label { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ---- 表格 ---- */
.table-wrap { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--card); border-radius: var(--radius); }
table.list th, table.list td { padding: 9px 10px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
table.list td.wrap { white-space: normal; min-width: 160px; }
table.list th { background: #f0f4f6; color: var(--muted); font-weight: 600; font-size: 12.5px; }
table.list tr:hover td { background: #f8f9ff; }
.empty { padding: 30px; text-align: center; color: var(--muted); }

/* ---- 按鈕、標籤 ---- */
.btn {
  display: inline-block; padding: 7px 14px; border-radius: 7px; border: 1px solid transparent;
  background: var(--primary); color: #fff; cursor: pointer; font-size: 14px; line-height: 1.4;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #fff; color: var(--text); border-color: var(--border); }
.btn.secondary:hover { background: #f0f4f6; }
.btn.danger { background: var(--danger); }
.btn.warn { background: var(--accent); }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.tiny { padding: 2px 8px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.tag { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 12px; background: #eef2f5; color: var(--muted); }
.tag.ok { background: var(--ok-bg); color: var(--ok); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.danger { background: var(--danger-bg); color: var(--danger); }
.tag.primary { background: var(--primary-light); color: var(--primary-dark); }

/* ---- 工具列 ---- */
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; }
.toolbar .spacer { flex: 1; }

/* ---- 表單 ---- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 7px; background: #fff;
}
.field textarea { min-height: 84px; resize: vertical; }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.form-row .field { flex: 1; min-width: 160px; }
.switch { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }

/* ---- 彈窗 ---- */
.modal-back { position: fixed; inset: 0; background: rgba(0,0,0,0.45); display: flex; align-items: flex-start; justify-content: center; z-index: 80; padding: 40px 16px; overflow-y: auto; }
.modal { background: #fff; border-radius: 12px; width: 100%; max-width: 520px; box-shadow: 0 12px 40px rgba(0,0,0,0.25); }
.modal-head { padding: 16px 20px; border-bottom: 1px solid var(--border); font-size: 16px; font-weight: 700; }
.modal-body { padding: 18px 20px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ---- 登入頁 ---- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #5865f2, #23243a); padding: 20px; }
.login-card { background: #fff; border-radius: 14px; box-shadow: 0 12px 40px rgba(0,0,0,0.25); width: 100%; max-width: 360px; padding: 30px 28px; }
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.login-card .sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.login-card .btn { width: 100%; margin-top: 6px; padding: 10px; }
.login-card .err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 18px; }

/* ---- Toast ---- */
#toast { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); z-index: 200; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast { background: #2b2d42; color: #fff; padding: 10px 18px; border-radius: 8px; font-size: 14px; box-shadow: 0 4px 16px rgba(0,0,0,0.25); animation: toastin 0.2s; }
.toast.ok { background: #1e8e3e; }
.toast.err { background: #c0392b; }
@keyframes toastin { from { opacity: 0; transform: translateY(-8px); } }