@property --ang{syntax:'<angle>';initial-value:0deg;inherits:false}

:root{
  --bg:#04050a;
  --glass:rgba(16,19,30,.52);
  --glass-2:rgba(12,15,26,.72);
  --line:rgba(255,255,255,.075);
  --line-2:rgba(255,255,255,.135);
  --fg:#eef1f8; --fg-2:#9aa4bd; --fg-3:#5f6880;
  --acc:#6d5efc; --acc-2:#8f83ff; --cyan:#43d9f5; --mag:#b06cff;
  --ok:#3ddc9a; --warn:#ffb454; --bad:#ff5f6d;
  --r:14px; --r-sm:9px;
  --ff:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --fc:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --fd:"Orbitron",var(--fc);
  --fm:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--ff);font-size:14px;line-height:1.55;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
a{color:inherit;text-decoration:none}
canvas{display:block}
table{width:100%;border-collapse:collapse;font-size:13px}

::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:rgba(120,130,170,.35);border-radius:9px;border:2px solid transparent;background-clip:padding-box}
::-webkit-scrollbar-thumb:hover{background:rgba(143,131,255,.6);background-clip:padding-box;border:2px solid transparent}
::-webkit-scrollbar-track{background:transparent}

/* ---------- 背景 ---------- */
#stars{position:fixed;inset:0;z-index:0;pointer-events:none}
.nebula{position:fixed;inset:-20%;z-index:0;pointer-events:none;opacity:.55;
  background:
    radial-gradient(38% 32% at 18% 22%,rgba(109,94,252,.24),transparent 62%),
    radial-gradient(32% 30% at 82% 16%,rgba(67,217,245,.15),transparent 64%),
    radial-gradient(40% 36% at 68% 84%,rgba(176,108,255,.15),transparent 66%);
  filter:blur(32px);animation:nebulaDrift 36s var(--ease) infinite alternate}
@keyframes nebulaDrift{
  0%{transform:translate3d(0,0,0) scale(1)}
  50%{transform:translate3d(-2.5%,2%,0) scale(1.05)}
  100%{transform:translate3d(2.5%,-2%,0) scale(1.02)}}
.grain{position:fixed;inset:-140%;z-index:900;pointer-events:none;opacity:.045;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='260' height='260'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grainShift .9s steps(4) infinite}
@keyframes grainShift{
  0%{transform:translate(0,0)}25%{transform:translate(-3%,2%)}
  50%{transform:translate(2%,-3%)}75%{transform:translate(-2%,-2%)}100%{transform:translate(0,0)}}
.vignette{position:fixed;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 45%,transparent 45%,rgba(1,2,6,.66) 100%)}
.scanline{position:fixed;inset:0;z-index:2;pointer-events:none;opacity:.2;
  background:repeating-linear-gradient(0deg,rgba(255,255,255,.024) 0 1px,transparent 1px 3px)}

/* ---------- 毛玻璃 ---------- */
.glass{background:var(--glass);-webkit-backdrop-filter:blur(22px) saturate(150%);
  backdrop-filter:blur(22px) saturate(150%);border:1px solid var(--line);
  border-radius:var(--r);position:relative}
.gline{position:relative}
.gline::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;pointer-events:none;
  background:conic-gradient(from var(--ang),transparent 0deg,rgba(109,94,252,.8) 40deg,rgba(67,217,245,.8) 90deg,transparent 140deg,transparent 360deg);
  -webkit-mask:linear-gradient(#000,#000) content-box,linear-gradient(#000,#000);
  -webkit-mask-composite:xor;mask-composite:exclude;
  animation:spinAng 6s linear infinite;opacity:0;transition:opacity .3s}
.gline:hover::before{opacity:1}
@keyframes spinAng{to{--ang:360deg}}
.sheen{position:relative;overflow:hidden}
.sheen::before{content:"";position:absolute;top:0;left:-60%;width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.08),transparent);
  transform:skewX(-18deg);pointer-events:none;animation:sheen 5.5s var(--ease) infinite}
@keyframes sheen{0%{left:-60%}55%{left:130%}100%{left:130%}}

/* ---------- 控件 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:36px;padding:0 16px;
  border-radius:var(--r-sm);font-size:13px;font-weight:500;background:rgba(255,255,255,.045);
  border:1px solid var(--line);color:var(--fg-2);transition:.18s var(--ease);white-space:nowrap;
  position:relative;overflow:hidden}
.btn:hover{border-color:var(--line-2);color:var(--fg);background:rgba(255,255,255,.08)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.pri{background:linear-gradient(135deg,var(--acc),#5a7ffc 55%,var(--cyan));border-color:transparent;
  color:#fff;font-weight:600;box-shadow:0 6px 24px -8px rgba(109,94,252,.9)}
.btn.pri:hover{filter:brightness(1.12)}
.btn.danger{border-color:rgba(255,95,109,.4);color:#ff8d95}
.btn.danger:hover{background:rgba(255,95,109,.14)}
.btn.sm{height:30px;padding:0 11px;font-size:12px}
.btn.xs{height:26px;padding:0 9px;font-size:11.5px;border-radius:7px}
.btn.block{width:100%}
.btn.lg{height:46px;font-size:14px;border-radius:11px}

.inp{width:100%;height:40px;padding:0 12px;background:rgba(255,255,255,.035);
  border:1px solid var(--line);border-radius:var(--r-sm);outline:none;font-size:13px;color:var(--fg);
  transition:border-color .18s,box-shadow .18s}
.inp:focus{border-color:rgba(109,94,252,.75);box-shadow:0 0 0 3px rgba(109,94,252,.14)}
.inp::placeholder{color:var(--fg-3)}
.inp.mono{font-family:var(--fm);font-size:12.5px}
textarea.inp{height:auto;padding:11px 12px;line-height:1.65;resize:vertical;min-height:88px}
select.inp{appearance:none;cursor:pointer;padding-right:30px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%239aa4bd' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 11px center}
select.inp option{background:#0d1020;color:#eef1f8}
label.fl{display:block;font-size:11.5px;color:var(--fg-3);margin-bottom:7px;font-weight:500}

.sw{position:relative;width:38px;height:21px;border-radius:99px;background:rgba(255,255,255,.09);
  border:1px solid var(--line);transition:.2s;cursor:pointer;flex:0 0 38px;display:inline-block;vertical-align:middle}
.sw::after{content:"";position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;
  background:#7b8399;transition:.2s var(--ease)}
.sw.on{background:linear-gradient(135deg,rgba(109,94,252,.55),rgba(67,217,245,.4));
  border-color:rgba(143,131,255,.6)}
.sw.on::after{left:20px;background:#fff;box-shadow:0 0 10px rgba(143,131,255,1)}
.sw-l{display:flex;align-items:center;gap:9px;font-size:12.5px;color:var(--fg-2);cursor:pointer}

input[type=range]{-webkit-appearance:none;width:100%;height:4px;border-radius:99px;outline:none;
  background:linear-gradient(90deg,var(--acc) var(--p,50%),rgba(255,255,255,.09) var(--p,50%))}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;
  background:#fff;box-shadow:0 0 0 3px rgba(109,94,252,.35),0 0 14px rgba(109,94,252,.9);cursor:pointer}

.chip{height:32px;padding:0 14px;border-radius:99px;font-size:12.5px;font-weight:500;
  background:rgba(255,255,255,.035);border:1px solid var(--line);color:var(--fg-2);
  transition:.16s var(--ease);display:inline-flex;align-items:center;gap:6px}
.chip:hover{border-color:var(--line-2);color:var(--fg)}
.chip.on{background:linear-gradient(135deg,rgba(109,94,252,.3),rgba(67,217,245,.16));
  border-color:rgba(143,131,255,.55);color:#fff}

/* ---------- 布局 ---------- */
.app{display:flex;min-height:100vh;position:relative;z-index:5}
.side{width:224px;flex:0 0 224px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
  z-index:70;background:rgba(9,11,20,.62);
  -webkit-backdrop-filter:blur(24px) saturate(150%);backdrop-filter:blur(24px) saturate(150%);
  border-right:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;padding:17px 15px;border-bottom:1px solid var(--line)}
.logo{width:30px;height:30px;flex:0 0 30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--acc),var(--cyan));font-family:var(--fc);font-weight:900;
  font-size:14px;color:#fff;box-shadow:0 0 22px -4px rgba(109,94,252,.95)}
.brand-t{font-family:var(--fc);font-weight:900;letter-spacing:1.5px;font-size:14px}
.brand-t em{font-style:normal;color:var(--cyan)}
.nav{padding:10px 9px 16px;overflow-y:auto;flex:1}
.grp{font-size:10px;color:var(--fg-3);letter-spacing:1.4px;text-transform:uppercase;
  padding:14px 10px 6px;font-weight:600;font-family:var(--fm)}
.nav a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:var(--r-sm);
  color:var(--fg-2);font-size:13.5px;transition:.16s var(--ease);margin-bottom:1px;position:relative;cursor:pointer}
.nav a:hover{background:rgba(255,255,255,.05);color:var(--fg)}
.nav a.on{background:linear-gradient(90deg,rgba(109,94,252,.24),rgba(67,217,245,.06));
  color:#fff;font-weight:500;box-shadow:inset 0 0 0 1px rgba(143,131,255,.26)}
.nav a.on::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:2.5px;height:17px;border-radius:99px;background:linear-gradient(180deg,var(--acc-2),var(--cyan))}
.nav a .ic{width:17px;text-align:center;font-size:13px;opacity:.85}
.nav a .tag{margin-left:auto;font-size:10px;padding:1px 7px;border-radius:99px;
  background:rgba(255,255,255,.07);color:var(--fg-3);font-family:var(--fm)}
.side-foot{border-top:1px solid var(--line);padding:12px}
.quota{padding:12px 13px;background:rgba(255,255,255,.035);border:1px solid var(--line);border-radius:var(--r-sm)}
.quota .lbl{font-size:11px;color:var(--fg-3);display:flex;justify-content:space-between;margin-bottom:7px}
.quota .amt{font-family:var(--fm);font-size:17px;font-weight:600;
  background:linear-gradient(100deg,#fff,var(--cyan));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.quota .add{width:100%;margin-top:9px;height:28px;font-size:11.5px}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:60px;flex:0 0 60px;display:flex;align-items:center;gap:12px;padding:0 20px;
  position:sticky;top:0;z-index:60;background:rgba(9,11,20,.58);
  -webkit-backdrop-filter:blur(24px) saturate(160%);backdrop-filter:blur(24px) saturate(160%);
  border-bottom:1px solid var(--line)}
.crumb{font-size:13px;color:var(--fg-3)}
.crumb b{color:var(--fg);font-weight:500}
.burger{display:none;width:36px;height:36px;border-radius:var(--r-sm);place-items:center;color:var(--fg-2);font-size:15px}
.topbar .r{margin-left:auto;display:flex;gap:9px;align-items:center}
.me{display:flex;align-items:center;gap:8px;padding:3px 11px 3px 3px;border-radius:99px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);cursor:pointer;transition:.18s}
.me:hover{background:rgba(255,255,255,.08)}
.me .av{width:26px;height:26px;flex:0 0 26px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--cyan),var(--acc));color:#fff;font-size:11px;font-weight:700}
.me .nm{font-size:12.5px}
.me .plan{font-size:9.5px;color:var(--warn);border:1px solid rgba(255,180,84,.35);
  background:rgba(255,180,84,.1);padding:0 5px;border-radius:4px;font-family:var(--fd);font-weight:700}

.body{padding:20px 22px 60px;max-width:1440px;width:100%}
.page-h{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.page-h .r{margin-left:auto;display:flex;gap:8px}
h1.t{font-family:var(--fd);font-size:19px;font-weight:900;letter-spacing:1.2px;
  background:linear-gradient(100deg,#fff,#c3bcff 55%,#8fe6ff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sub{color:var(--fg-3);font-size:12.5px;margin-top:4px}

/* ---------- 卡片 / 统计 ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:13px}
.stat{padding:15px 16px;border-radius:var(--r);display:flex;flex-direction:column;gap:6px;overflow:hidden}
.stat .k{font-size:11.5px;color:var(--fg-3);display:flex;align-items:center;gap:7px}
.stat .k i{width:5px;height:5px;border-radius:50%;background:var(--acc-2);box-shadow:0 0 9px var(--acc-2)}
.stat .v{font-family:var(--fm);font-size:21px;font-weight:600;letter-spacing:-.4px}
.stat .d{font-size:11.5px;color:var(--fg-3)}

.panel{margin-top:18px;border-radius:var(--r);overflow:hidden}
.panel-h{padding:13px 17px;border-bottom:1px solid var(--line);display:flex;align-items:center;
  gap:10px;background:rgba(255,255,255,.022);flex-wrap:wrap}
.panel-h .nm{font-family:var(--fd);font-weight:900;font-size:12.5px;letter-spacing:1px}
.panel-h .r{margin-left:auto;display:flex;gap:8px;align-items:center}
.panel-b{padding:17px}

/* ---------- 表格 ---------- */
.tbl-wrap{overflow-x:auto}
th{text-align:left;font-weight:500;font-size:10.5px;color:var(--fg-3);padding:11px 15px;
  background:rgba(255,255,255,.028);border-bottom:1px solid var(--line);
  letter-spacing:.9px;text-transform:uppercase;white-space:nowrap;font-family:var(--fm)}
td{padding:12px 15px;border-bottom:1px solid var(--line);color:var(--fg-2);white-space:nowrap;font-size:12.5px}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover td{background:rgba(255,255,255,.03)}
td.mono{font-family:var(--fm);font-size:11.5px;color:var(--fg)}
td .strong{color:var(--fg);font-weight:500}
.pill{font-size:10.5px;padding:2px 9px;border-radius:99px;border:1px solid;font-family:var(--fm)}
.pill.on{color:var(--ok);border-color:rgba(61,220,154,.34);background:rgba(61,220,154,.1)}
.pill.off{color:var(--fg-3);border-color:var(--line);background:rgba(255,255,255,.04)}
.pill.warn{color:var(--warn);border-color:rgba(255,180,84,.34);background:rgba(255,180,84,.1)}
.pill.bad{color:#ff8d95;border-color:rgba(255,95,109,.34);background:rgba(255,95,109,.1)}
.lk{color:var(--acc-2);font-family:var(--fm);font-size:11.5px;cursor:pointer;transition:.15s}
.lk:hover{text-decoration:underline}
.lk.danger{color:#ff8d95}
.empty{padding:44px;text-align:center;color:var(--fg-3);font-size:13px}
.pager{display:flex;align-items:center;gap:8px;padding:12px 16px;font-size:12px;color:var(--fg-3)}
.pager .r{margin-left:auto;display:flex;gap:6px}

/* ---------- 弹窗 ---------- */
.mask{position:fixed;inset:0;z-index:800;background:rgba(2,3,8,.76);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:grid;place-items:center;
  padding:26px;opacity:0;pointer-events:none;transition:opacity .22s}
.mask.show{opacity:1;pointer-events:auto}
.dlg{width:100%;max-width:560px;max-height:88vh;overflow-y:auto;border-radius:17px;
  transform:scale(.96) translateY(8px);transition:transform .24s var(--ease);
  background:rgba(12,15,26,.92);-webkit-backdrop-filter:blur(30px) saturate(160%);
  backdrop-filter:blur(30px) saturate(160%);border:1px solid var(--line-2);
  box-shadow:0 60px 130px -40px rgba(0,0,0,.95)}
.dlg.wide{max-width:820px}
.mask.show .dlg{transform:none}
.dlg-h{padding:17px 21px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:11px;
  position:sticky;top:0;background:rgba(12,15,26,.96);z-index:2}
.dlg-h .t{font-family:var(--fd);font-size:14px;font-weight:900;letter-spacing:1px}
.dlg-h .x{margin-left:auto;width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  color:var(--fg-3);border:1px solid var(--line);transition:.16s}
.dlg-h .x:hover{color:#fff;background:rgba(255,255,255,.07)}
.dlg-b{padding:20px 21px 23px}
.dlg-f{display:flex;gap:9px;padding:15px 21px 20px;flex-wrap:wrap}
.dlg-f .r{margin-left:auto;display:flex;gap:9px}

/* ---------- 表单 ---------- */
.fg{margin-bottom:14px}
.fg .hint{font-size:11px;color:var(--fg-3);margin-top:6px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:13px}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:32px;transform:translate(-50%,90px);opacity:0;z-index:999;
  background:rgba(14,17,30,.94);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border:1px solid rgba(143,131,255,.34);color:var(--fg);padding:12px 22px;border-radius:99px;
  font-size:13px;transition:transform .28s var(--ease),opacity .28s;pointer-events:none;
  white-space:nowrap;max-width:80vw;overflow:hidden;text-overflow:ellipsis;
  box-shadow:0 16px 44px -14px rgba(109,94,252,.9)}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast.err{border-color:rgba(255,95,109,.5)}

/* ---------- 认证页 ---------- */
.auth{position:relative;z-index:5;min-height:100vh;display:grid;grid-template-columns:1fr 440px}
.auth-l{padding:40px 52px;display:flex;flex-direction:column;position:relative;overflow:hidden}
.auth-r{display:grid;place-items:center;padding:40px 36px;border-left:1px solid var(--line);
  background:rgba(6,8,16,.4)}
.auth-card{width:100%;max-width:376px;padding:28px 26px 24px;border-radius:18px}
.auth-card h2{font-family:var(--fc);font-size:19px;font-weight:900;letter-spacing:1px}
.auth-card .s{color:var(--fg-3);font-size:12.5px;margin:7px 0 20px}
.tabs{display:flex;gap:3px;background:rgba(255,255,255,.035);border:1px solid var(--line);
  padding:3px;border-radius:var(--r-sm);margin-bottom:18px}
.tabs button{flex:1;height:31px;border-radius:7px;font-size:12.5px;color:var(--fg-3);
  font-weight:500;transition:.15s}
.tabs button.on{background:linear-gradient(135deg,rgba(109,94,252,.34),rgba(67,217,245,.18));
  color:#fff;box-shadow:inset 0 0 0 1px rgba(143,131,255,.36)}
.code-row{display:flex;gap:8px}
.code-row .inp{flex:1}
.oauth-btns{display:flex;gap:9px;margin-top:4px}
.oauth-btn{flex:1;height:42px;border:1px solid var(--line);background:rgba(255,255,255,.035);
  border-radius:10px;font-size:12.5px;color:var(--fg-2);display:flex;align-items:center;
  justify-content:center;gap:7px;transition:.18s}
.oauth-btn:hover{border-color:var(--line-2);color:var(--fg);background:rgba(255,255,255,.07)}
.or{display:flex;align-items:center;gap:11px;margin:17px 0;color:var(--fg-3);font-size:11px}
.or::before,.or::after{content:"";flex:1;height:1px;
  background:linear-gradient(90deg,transparent,var(--line-2),transparent)}
.hero-w{font-family:var(--fc);font-weight:900;font-size:clamp(30px,3.4vw,44px);
  letter-spacing:1.6px;line-height:1.2;margin:20px 0 0}
.hero-w em{font-style:normal;
  background:linear-gradient(100deg,var(--acc-2),var(--cyan) 58%,var(--mag));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-p{color:var(--fg-2);margin-top:16px;font-size:14.5px;line-height:1.85;max-width:500px}
.hero-st{display:flex;gap:38px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}
.hero-st b{display:block;font-family:var(--fm);font-size:23px;font-weight:600;
  background:linear-gradient(120deg,#fff,var(--acc-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-st span{font-size:11px;color:var(--fg-3)}

/* ---------- 工具类 ---------- */
.mono{font-family:var(--fm)}
.dim{color:var(--fg-3)}
.ok{color:var(--ok)}
.warn{color:var(--warn)}
.bad{color:var(--bad)}
.mt-0{margin-top:0}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.hide{display:none !important}
.flex{display:flex;align-items:center;gap:9px}
.flex-between{display:flex;align-items:center;justify-content:space-between;gap:9px}
.wrap-flex{display:flex;flex-wrap:wrap;gap:9px}
.copy-key{display:flex;align-items:center;gap:8px}
.copy-key code{font-family:var(--fm);font-size:12px;background:rgba(255,255,255,.05);
  padding:3px 8px;border-radius:6px;border:1px solid var(--line);word-break:break-all}

@media(max-width:1000px){
  .auth{grid-template-columns:1fr}
  .auth-l{display:none}
  .row3{grid-template-columns:1fr}
}
@media(max-width:900px){
  .side{position:fixed;left:0;top:0;transform:translateX(-100%);transition:transform .24s var(--ease)}
  .side.open{transform:none}
  .burger{display:grid}
  .body{padding:15px 13px 50px}
  .row2{grid-template-columns:1fr}
}


/* 移动端侧边栏遮罩：点击空白处关闭 */
.side-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:59;
  opacity:0;pointer-events:none;transition:opacity .2s var(--ease)}
@media(max-width:900px){
  .side{z-index:60}
  .side.open ~ .side-backdrop,
  body.side-open .side-backdrop{opacity:1;pointer-events:auto}
}