:root{
  --bg:#f4f6fb; --surface:#ffffff; --surface2:#fafbfe;
  --border:#e7eaf2; --border2:#eef0f6;
  --text:#1d2330; --muted:#8a90a2;
  --accent:#6d5cff; --accent2:#8b6cff; --accent-soft:#eeebff;
  --green:#16a34a; --green-soft:#e9f8ef;
  --danger:#e5484d; --danger-soft:#fdeced;
  --gold1:#caa14a; --gold2:#f0d27a;
  --radius:12px; --radius-sm:9px;
  --shadow:0 6px 22px rgba(60,70,120,.07);
}

/* 暗色：只覆寫一組變數，全站跟著翻面 */
html.dark{
  --bg:#0b0b11; --surface:#16161f; --surface2:#1b1b25;
  --border:#272733; --border2:#22222e;
  --text:#e7e7ef; --muted:#8a8a9a;
  --accent:#7c6cff; --accent2:#9b7bff; --accent-soft:rgba(124,108,255,.18);
  --green:#34d399; --green-soft:rgba(52,211,153,.14);
  --danger:#f87171; --danger-soft:rgba(248,113,113,.16);
  --gold2:#e6c25c;
  --shadow:0 8px 26px rgba(0,0,0,.5);
}

/* 亮/暗切換鈕（右下角懸浮 · 生動版）*/
.theme-toggle{position:fixed;right:20px;bottom:20px;z-index:60;width:48px;height:48px;border-radius:50%;
  border:1px solid var(--border);background:var(--surface);color:var(--accent);cursor:pointer;
  display:grid;place-items:center;box-shadow:var(--shadow);overflow:hidden;
  transition:transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .25s, border-color .25s, background .3s}
.theme-toggle:hover{transform:translateY(-3px) scale(1.1);border-color:var(--accent);
  box-shadow:0 8px 22px rgba(124,108,255,.4)}
.theme-toggle:active{transform:scale(.9)}
.theme-toggle:focus-visible{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.theme-toggle .ic{grid-area:1/1;transition:opacity .35s ease, transform .55s cubic-bezier(.34,1.56,.64,1)}
.theme-toggle .ic:nth-child(1){opacity:1;transform:rotate(0) scale(1)}
.theme-toggle .ic:nth-child(2){opacity:0;transform:rotate(-130deg) scale(.2)}
html.dark .theme-toggle .ic:nth-child(1){opacity:0;transform:rotate(130deg) scale(.2)}
html.dark .theme-toggle .ic:nth-child(2){opacity:1;transform:rotate(0) scale(1)}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Microsoft JhengHei",Roboto,sans-serif;
  font-size:14px; line-height:1.5;
}
a{color:inherit;text-decoration:none}
.ic{vertical-align:-2px;flex:0 0 auto}
.muted{color:var(--muted)}
.small{font-size:12px}
.r{text-align:right}
.grow{flex:1}
.plus{color:var(--green)}
.minus{color:var(--danger)}
.price{color:var(--accent)}

/* ---------------- buttons / inputs ---------------- */
.btn-primary,.btn,.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;justify-content:center;
  border-radius:var(--radius-sm);font-size:13px;font-weight:600;
  cursor:pointer;border:1px solid transparent;padding:8px 15px;transition:.15s;
  font-family:inherit;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{filter:brightness(1.05)}
.btn-primary:disabled{opacity:.45;cursor:not-allowed;filter:none}
.btn{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn:hover{border-color:#cfd4e6;background:var(--surface2)}
.btn-ghost{background:transparent;color:var(--muted);padding:6px 10px}
.btn-ghost:hover{background:var(--accent-soft);color:var(--accent)}
.btn.small{padding:5px 10px;font-size:12px}
.btn.block,.btn-primary.block{display:flex;width:100%}
.danger,.btn.danger{color:var(--danger);border-color:var(--danger-soft)}
.btn.danger:hover{background:var(--danger-soft)}
.copied{color:var(--green)!important}

.input{
  width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);
  padding:9px 11px;font-size:13.5px;color:var(--text);font-family:inherit;outline:none;transition:.15s;
}
.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
textarea.input{resize:vertical;line-height:1.6}
.select-wrap{position:relative}
.select-wrap::after{content:"";position:absolute;right:13px;top:50%;width:7px;height:7px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);pointer-events:none}
select.input{appearance:none;-webkit-appearance:none;padding-right:30px;cursor:pointer}
.field-label{display:block;font-size:12px;color:var(--muted);margin:12px 0 5px}

/* ---------------- reseller navbar ---------------- */
.navbar{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:18px;
  padding:0 22px;height:56px;background:var(--surface);border-bottom:1px solid var(--border);
}
.brand{display:flex;align-items:center;gap:7px;font-weight:800;font-size:15px;color:var(--text)}
.brand .ic{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:4px;flex:1;overflow-x:auto}
.nav-links a{display:flex;align-items:center;gap:6px;padding:7px 12px;border-radius:8px;
  color:var(--muted);font-weight:600;font-size:13px;white-space:nowrap}
.nav-links a:hover{background:var(--surface2);color:var(--text)}
.nav-links a.active{background:var(--accent-soft);color:var(--accent)}
.navbar-right{display:flex;align-items:center;gap:9px}
.balance-pill{display:inline-flex;align-items:center;gap:6px;background:var(--green-soft);color:var(--green);
  font-weight:700;font-size:12.5px;padding:6px 11px;border-radius:20px}
.group-badge{background:var(--gold2);color:#3a2c00;
  font-weight:700;font-size:12px;padding:5px 11px;border-radius:20px;white-space:nowrap}
.admin-badge{background:var(--accent-soft);color:var(--accent)}

/* ---------------- admin shell ---------------- */
body.is-admin{display:flex;min-height:100vh}
.sidebar{width:212px;flex:0 0 212px;background:var(--surface);border-right:1px solid var(--border);
  padding:16px 12px;position:sticky;top:0;height:100vh}
.sidebar .brand{padding:6px 8px 18px;flex-wrap:wrap}
.brand-sub{font-size:11px;font-weight:600;color:var(--muted);width:100%;margin-top:2px;margin-left:25px}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-nav a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:9px;
  color:var(--muted);font-weight:600;font-size:13px}
.side-nav a:hover{background:var(--surface2);color:var(--text)}
.side-nav a.active{background:var(--accent-soft);color:var(--accent)}
.side-nav a.active .ic{color:var(--accent)}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;height:56px;
  padding:0 24px;background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.page-title{font-weight:700;font-size:15px}
.topbar-right{display:flex;align-items:center;gap:10px}

/* ---------------- content ---------------- */
.content{padding:22px 24px;max-width:1080px}
.reseller-content{margin:0 auto;width:100%}
.page-h{margin:2px 0 16px;display:flex;align-items:center;gap:8px}

.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px 18px;margin-bottom:16px;box-shadow:var(--shadow)}
.panel-title{display:flex;align-items:center;gap:8px;font-weight:700;font-size:14px;margin-bottom:12px}
.panel-title .ic{color:var(--accent)}
.empty-card{background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);
  padding:34px;text-align:center;color:var(--muted)}
.hint{color:var(--muted);font-size:12px;margin:10px 0 0}

.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* hamburger / drawer toggles (hidden on desktop) */
.icon-btn{display:none;align-items:center;justify-content:center;width:38px;height:38px;
  border:1px solid var(--border);background:var(--surface);border-radius:9px;color:var(--text);cursor:pointer;flex:0 0 auto}
.icon-btn:hover{background:var(--surface2);color:var(--accent)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(20,24,40,.45);z-index:40}

/* ---------------- buy panel ---------------- */
.buy-wrap{display:flex;justify-content:center}
.buy-panel{width:100%;max-width:420px}
.qty{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.qty-btn{width:40px;height:34px;border:none;background:var(--surface);color:var(--muted);font-size:18px;cursor:pointer}
.qty-btn:hover{background:var(--surface2);color:var(--accent)}
.qty-input{width:64px;height:34px;text-align:center;border:none;border-left:1px solid var(--border);
  border-right:1px solid var(--border);font-size:14px;font-family:inherit;outline:none;-moz-appearance:textfield;
  background:transparent;color:var(--text)}
.qty-input::-webkit-outer-spin-button,.qty-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.summary{margin:16px 0 14px;border-top:1px dashed var(--border);padding-top:12px}
.summary-row{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px;padding:4px 0}
.summary-row span:last-child{color:var(--text)}
.summary-row.total{margin-top:4px}
.total-amt{color:var(--accent);font-size:22px;font-weight:800}

/* ---------------- cards / codes ---------------- */
.cards-list{display:flex;flex-direction:column;gap:8px;margin:8px 0}
.card-code{display:flex;align-items:center;gap:10px;background:var(--surface2);border:1px solid var(--border2);
  border-radius:9px;padding:8px 12px}
.card-code code{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;word-break:break-all}
.result-panel{max-width:560px;margin:0 auto}
.result-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.result-ok{width:38px;height:38px;border-radius:50%;background:var(--green-soft);color:var(--green);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.result-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}

/* ---------------- tables ---------------- */
.table{width:100%;border-collapse:collapse;font-size:13px}
.table th{text-align:left;color:var(--muted);font-weight:600;font-size:12px;padding:8px 10px;border-bottom:1px solid var(--border)}
.table td{padding:10px;border-bottom:1px solid var(--border2);vertical-align:middle}
.table tr:last-child td{border-bottom:none}
.table.sub{margin:6px 0}
.table th.r,.table td.r{text-align:right}

.tag-green,.tag-gray,.tag-purple,.tag-red{font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:6px;white-space:nowrap}
.tag-green{background:var(--green-soft);color:var(--green)}
.tag-purple{background:var(--accent-soft);color:var(--accent)}
.tag-gray{background:#eef0f6;color:var(--muted)}
.tag-red{background:var(--danger-soft);color:var(--danger)}
.badge{background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12px;padding:3px 9px;border-radius:6px}

/* ---------------- forms / rows ---------------- */
.inline-form{display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.inline-form .input{width:auto}
.inline-form .input.grow{flex:1;min-width:160px}
.sub-form{margin-top:10px}
.stack-form{display:flex;flex-direction:column;gap:4px;margin-top:8px}
.stack-form .btn,.stack-form .btn-primary{margin-top:10px}
.row-actions{display:flex;gap:7px;align-items:center}
.row-actions form{display:inline}

.product-block .product-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:6px}
.product-name{font-size:15px;margin-right:8px}

/* ---------------- stats / dashboard ---------------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:16px}
@media(max-width:820px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;display:flex;align-items:center;gap:13px;box-shadow:var(--shadow)}
.stat-ic{width:42px;height:42px;border-radius:11px;background:var(--accent-soft);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto}
.stat-num{font-size:22px;font-weight:800;line-height:1.1}
.stat-label{font-size:12px;color:var(--muted)}
.big-balance{font-size:24px;font-weight:800;color:var(--accent);margin:2px 0 10px}
.balance-top{display:flex;align-items:center;gap:8px}
.balance-top .big-balance{margin:0}

/* ---------------- price grid ---------------- */
.grid-scroll{overflow-x:auto}
.table.grid td,.table.grid th{white-space:nowrap}
.table.grid .cell{width:92px;padding:6px 8px;text-align:right}
.grp-row td{background:var(--surface2);font-weight:700;color:var(--text);font-size:12.5px}
.sticky-col{position:sticky;left:0;background:var(--surface);z-index:1}
.grp-row .sticky-col{background:var(--surface2)}

/* ---------------- announcements ---------------- */
.announce-body{white-space:pre-wrap;margin-top:8px;color:var(--text);line-height:1.7}
.announce-row{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--border2)}
.announce-row:last-child{border-bottom:none}
.back{margin-bottom:14px}

/* ---------------- order card ---------------- */
.order-card .order-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:10px}
.order-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}

/* ---------------- flash ---------------- */
.flash-wrap{margin-bottom:16px;display:flex;flex-direction:column;gap:8px}
.flash{padding:11px 14px;border-radius:var(--radius-sm);font-size:13px;font-weight:600;border:1px solid;transition:opacity .4s ease, transform .4s ease}
.flash-ok{background:var(--green-soft);color:var(--green);border-color:#bfe8cf}
.flash-error{background:var(--danger-soft);color:var(--danger);border-color:#f6c9cb}

/* ---------------- login ---------------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:var(--bg)}
.login-card{width:340px;background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:30px 28px;box-shadow:0 12px 40px rgba(60,70,120,.12)}
.login-brand{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:800;justify-content:center}
.login-brand .ic{color:var(--accent)}
.login-sub{text-align:center;color:var(--muted);font-size:13px;margin:6px 0 18px}
.login-form{display:flex;flex-direction:column}
.login-form label{font-size:12px;color:var(--muted);margin:10px 0 5px}
.login-form .btn-primary{margin-top:18px;padding:11px}

/* ============== 手機 / 平板（≤820px）============== */
@media(max-width:820px){
  .cols{grid-template-columns:1fr;gap:12px}
  .content{padding:14px}
  .stat-grid{gap:10px}

  /* 經銷商：頂部導航 -> 漢堡下拉 */
  .navbar{padding:0 14px;gap:10px}
  .nav-toggle{display:inline-flex}
  .nav-links{position:absolute;top:56px;left:0;right:0;z-index:30;display:none;
    flex-direction:column;align-items:stretch;gap:2px;overflow:visible;
    background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow);padding:8px}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px}
  .navbar-right{gap:7px;margin-left:auto}
  .navbar-right .group-badge{display:none}

  /* 站長：側邊欄 -> 抽屜 */
  .menu-toggle{display:inline-flex}
  .topbar{padding:0 14px}
  .topbar-right .group-badge{display:none}
  .sidebar{position:fixed;top:0;left:0;height:100vh;z-index:50;
    transform:translateX(-100%);transition:transform .25s ease;box-shadow:0 0 44px rgba(0,0,0,.2)}
  .sidebar.open{transform:none}
  .sidebar-overlay.open{display:block}

  /* 寬表格：每格單行，超出就整張橫滑（不再硬擠換行）*/
  .panel{overflow-x:auto}
  .table{min-width:0}
  .table td,.table th{white-space:nowrap}
  .table.grid{min-width:0}

  /* 表單元素換行 */
  .inline-form .input.grow{min-width:120px}
}

/* 很窄的手機（≤420px）再收一點 */
@media(max-width:420px){
  .brand{font-size:14px}
  .balance-pill{font-size:12px;padding:5px 9px}
  .stat-grid{grid-template-columns:1fr}
  .result-actions{flex-direction:column}
  .result-actions .btn,.result-actions .btn-primary{width:100%}
}

/* ---------------- 安全相關 UI ---------------- */
/* 登出做成 POST 表單，但外觀跟原本的連結一致 */
.inline-logout{display:inline-flex;margin:0}

/* 預設密碼警告橫幅 */
.pw-banner{display:flex;align-items:center;gap:8px;background:var(--danger-soft);color:var(--danger);
  border:1px solid var(--danger);border-radius:var(--radius-sm);padding:10px 14px;
  font-size:13px;font-weight:600;margin-bottom:16px}
.pw-banner a{color:var(--danger);text-decoration:underline;font-weight:800}

/* 改密碼頁 */
.account-panel{max-width:460px}

/* flash 自動淡出（.flash 基底樣式在上面，這裡只加淡出狀態）*/
.flash.fade-out{opacity:0;transform:translateY(-6px)}

/* 按鈕載入中的轉圈 */
.spinner{width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;
  border-radius:50%;display:inline-block;animation:spin .6s linear infinite;vertical-align:-2px}
@keyframes spin{to{transform:rotate(360deg)}}