/* ========== FreeP · mobile-first dark theme ========== */
:root{
  --bg:#0b0e15;
  --bg2:#0f131d;
  --card:#151b28;
  --card-hover:#1a2233;
  --line:#232c40;
  --text:#e8ecf4;
  --muted:#8a94a8;
  --muted2:#5d6779;
  --accent:#4f8cff;
  --accent-dim:#2f5fc4;
  --green:#2fd47a;
  --orange:#ffab3d;
  --red:#ff5d5d;
  --gray:#5b6579;
  --radius:16px;
  --radius-sm:10px;
  --header-h:54px;
  --shadow:0 8px 28px rgba(0,0,0,.35);
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(79,140,255,.10), transparent 60%),
    radial-gradient(800px 400px at -20% 110%, rgba(47,212,122,.06), transparent 60%),
    var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  font-size:15px;
  line-height:1.45;
  min-height:100vh;
  overscroll-behavior-y:none;
}
.hidden{display:none !important}
button{font-family:inherit;color:inherit;background:none;border:none;cursor:pointer;padding:0}
input,select,textarea{font-family:inherit;font-size:16px;color:var(--text)}

/* ---------- header ---------- */
#header{
  position:fixed;top:0;left:0;right:0;height:calc(var(--header-h) + env(safe-area-inset-top));
  padding-top:env(safe-area-inset-top);
  display:flex;align-items:center;gap:6px;
  padding-left:10px;padding-right:12px;
  background:rgba(11,14,21,.82);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(35,44,64,.6);
  z-index:60;
}
.icon-btn{
  width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  color:var(--text);transition:background .15s;
}
.icon-btn:active{background:rgba(255,255,255,.08)}
.header-title{flex:1;font-size:17px;font-weight:700;letter-spacing:.3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.header-sub{font-size:12px;color:var(--muted);font-weight:400;margin-left:8px}
.header-actions{display:flex;align-items:center;gap:2px}
#btn-refresh.spin svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- drawer ---------- */
.mask{position:fixed;inset:0;background:rgba(0,0,0,.62);z-index:80}
#drawer{
  position:fixed;top:0;left:0;bottom:0;width:280px;max-width:84vw;z-index:90;
  background:var(--bg2);border-right:1px solid var(--line);
  display:flex;flex-direction:column;
  padding:calc(env(safe-area-inset-top) + 18px) 14px calc(var(--safe-b) + 18px);
  transform:translateX(-105%);transition:transform .24s cubic-bezier(.32,.72,.34,1);
  box-shadow:var(--shadow);
}
#drawer.open{transform:translateX(0)}
.drawer-brand{display:flex;align-items:center;gap:12px;padding:6px 8px 20px}
.brand-logo{
  width:44px;height:44px;border-radius:13px;flex:0 0 auto;
  background:linear-gradient(135deg,#4f8cff,#7a5cff);
  color:#fff;font-weight:800;font-size:22px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 18px rgba(79,140,255,.35);
}
.brand-logo.big{width:64px;height:64px;font-size:32px;border-radius:18px}
.brand-name{font-size:19px;font-weight:800;letter-spacing:.5px}
.brand-sub{font-size:12px;color:var(--muted)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.nav-item{
  display:flex;align-items:center;gap:14px;padding:13px 14px;border-radius:13px;
  color:var(--muted);font-size:15.5px;font-weight:600;text-decoration:none;transition:all .15s;
}
.nav-item svg{opacity:.85}
.nav-item.active{background:linear-gradient(90deg,rgba(79,140,255,.18),rgba(79,140,255,.05));color:var(--accent)}
.nav-item:active:not(.active){background:rgba(255,255,255,.05)}
.drawer-footer{border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:10px}
.drawer-user{font-size:13.5px;color:var(--muted);padding:0 6px;font-weight:600}
.drawer-user b{color:var(--text)}

/* ---------- layout ---------- */
#main{
  padding:calc(var(--header-h) + env(safe-area-inset-top) + 14px) 14px calc(96px + var(--safe-b));
  max-width:760px;margin:0 auto;
}
.view-title{font-size:20px;font-weight:800;margin:2px 2px 14px;display:flex;align-items:center;gap:10px}
.view-title .badge{
  font-size:12px;font-weight:700;color:var(--muted);background:var(--card);
  border:1px solid var(--line);padding:2px 10px;border-radius:99px;
}
.last-update{font-size:11.5px;color:var(--muted2);margin:-8px 2px 12px}

/* ---------- node cards ---------- */
.node-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:12px}
.node-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:13px 13px 11px;position:relative;cursor:pointer;
  transition:transform .12s, border-color .15s;user-select:none;
  min-height:118px;display:flex;flex-direction:column;
}
.node-card:active{transform:scale(.97)}
.node-card[data-state="online"]{border-color:rgba(47,212,122,.28)}
.node-card[data-state="congested"]{border-color:rgba(255,171,61,.3)}
.node-card[data-state="offline"]{opacity:.62}
.node-top{display:flex;align-items:center;gap:8px;min-width:0}
.dot{width:9px;height:9px;border-radius:50%;flex:0 0 auto;position:relative}
.dot::after{content:"";position:absolute;inset:-4px;border-radius:50%;opacity:0}
.dot.green{background:var(--green);box-shadow:0 0 8px rgba(47,212,122,.7)}
.dot.green::after{border:1px solid var(--green);animation:pulse 2s infinite}
.dot.orange{background:var(--orange);box-shadow:0 0 8px rgba(255,171,61,.7)}
.dot.gray{background:var(--gray)}
@keyframes pulse{0%{transform:scale(.6);opacity:.8}70%{transform:scale(1.4);opacity:0}100%{opacity:0}}
.node-name{font-size:13.5px;font-weight:700;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.node-menu-wrap{position:relative}
.menu-btn{width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-weight:800;letter-spacing:1px;flex:0 0 auto}
.menu-btn:active{background:rgba(255,255,255,.1);color:var(--text)}
.card-menu{
  position:absolute;right:-6px;top:30px;z-index:40;min-width:138px;
  background:var(--bg2);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:5px;animation:pop .12s ease-out;
}
@keyframes pop{from{opacity:0;transform:translateY(-4px) scale(.97)}to{opacity:1}}
.card-menu button{
  width:100%;display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:8px;
  font-size:14px;font-weight:600;color:var(--text);text-align:left;
}
.card-menu button:active{background:rgba(255,255,255,.07)}
.card-menu button.danger{color:var(--red)}
.card-menu button svg{opacity:.8}
.node-mid{flex:1;display:flex;align-items:flex-end;padding-top:10px}
.node-addr{font-size:13px;font-weight:600;color:var(--muted);font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;letter-spacing:.2px}
.node-addr b{color:var(--text);font-weight:700}
.node-bottom{display:flex;align-items:center;justify-content:space-between;margin-top:8px;padding-top:8px;border-top:1px dashed rgba(35,44,64,.9)}
.lat{font-size:12.5px;font-weight:700;font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace}
.lat.good{color:var(--green)}
.lat.bad{color:var(--orange)}
.lat.off{color:var(--gray);font-weight:600}
.tun-count{font-size:11px;color:var(--muted2)}
.tun-count b{color:var(--muted)}

/* ---------- tunnel cards ---------- */
.tunnel-list{display:flex;flex-direction:column;gap:12px}
.tunnel-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;position:relative;transition:border-color .15s;
}
.tunnel-card[data-proc="active"]{border-color:rgba(47,212,122,.22)}
.tunnel-head{display:flex;align-items:center;gap:10px}
.node-chip{
  display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;color:var(--muted);
  background:var(--bg2);border:1px solid var(--line);padding:3px 9px;border-radius:99px;
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
  max-width:46%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:0 1 auto;
}
.node-chip.offline{opacity:.55}
.node-chip b{color:var(--text)}
.tunnel-name{flex:1;font-size:15.5px;font-weight:800;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tunnel-card .card-menu{right:-4px;top:34px}
.tunnel-note{font-size:12.5px;color:var(--muted);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tunnel-route{
  display:flex;align-items:center;gap:8px;margin-top:11px;
  font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;font-size:13px;flex-wrap:wrap;
}
.route-box{
  background:var(--bg2);border:1px solid var(--line);border-radius:9px;
  padding:6px 11px;font-weight:600;color:var(--text);
}
.route-arrow{color:var(--muted2)}
.route-arrow svg{display:block}
.route-label{font-size:10.5px;color:var(--muted2);margin-bottom:2px;font-weight:600;letter-spacing:.4px}
.tunnel-foot{display:flex;align-items:center;justify-content:space-between;margin-top:12px;padding-top:10px;border-top:1px solid rgba(35,44,64,.7)}
.proc-badge{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;color:var(--muted)}
.proc-badge .dot{width:7px;height:7px}
.proc-badge .dot.green{box-shadow:none;animation:none}
.proc-badge .dot.green::after{display:none}
.proc-badge.ok{color:var(--green)}
.proc-badge.warn{color:var(--orange)}
.proc-badge.err{color:var(--red)}

/* ---------- switch ---------- */
.switch{position:relative;width:48px;height:28px;flex:0 0 auto}
.switch input{opacity:0;width:0;height:0}
.switch .track{
  position:absolute;inset:0;border-radius:99px;background:var(--line);
  transition:background .18s;cursor:pointer;border:1px solid rgba(255,255,255,.06);
}
.switch .track::after{
  content:"";position:absolute;top:2px;left:2px;width:22px;height:22px;border-radius:50%;
  background:#c6cddb;transition:transform .18s cubic-bezier(.34,1.4,.64,1),background .18s;
}
.switch input:checked + .track{background:linear-gradient(135deg,#2fd47a,#1fa35c)}
.switch input:checked + .track::after{transform:translateX(20px);background:#fff}
.switch input:disabled + .track{opacity:.5}

/* ---------- FAB ---------- */
.fab{
  position:fixed;right:18px;bottom:calc(20px + var(--safe-b));z-index:70;
  width:58px;height:58px;border-radius:19px;
  background:linear-gradient(135deg,#4f8cff,#6a5cff);
  color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 26px rgba(79,140,255,.45);
  transition:transform .12s;
}
.fab:active{transform:scale(.9)}

/* ---------- login ---------- */
#login-view{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:24px;z-index:50}
.login-box{width:100%;max-width:380px}
.login-logo{text-align:center;margin-bottom:34px}
.login-logo .brand-logo{margin:0 auto 18px}
.login-logo h1{margin:0;font-size:30px;letter-spacing:1px}
.login-logo p{margin:6px 0 0;color:var(--muted);font-size:13.5px;letter-spacing:2px}
#login-form{display:flex;flex-direction:column;gap:16px}
.login-hint{text-align:center;color:var(--muted2);font-size:12px;margin-top:4px;letter-spacing:.5px}

/* ---------- fields ---------- */
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.4px;padding-left:2px}
.field input,.field select,.field textarea{
  background:var(--card);border:1px solid var(--line);border-radius:13px;
  padding:13px 14px;outline:none;transition:border-color .15s, box-shadow .15s;width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.15);
}
.field input::placeholder,.field textarea::placeholder{color:var(--muted2)}
.field .row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.field-error{font-size:12px;color:var(--red);font-weight:600;padding-left:2px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:13px;padding:13px 18px;font-size:15px;font-weight:700;
  transition:transform .1s, filter .15s;border:1px solid transparent;
}
.btn:active{transform:scale(.97)}
.btn-block{width:100%}
.btn-primary{background:linear-gradient(135deg,#4f8cff,#6a5cff);color:#fff;box-shadow:0 6px 18px rgba(79,140,255,.32)}
.btn-primary:disabled{opacity:.55}
.btn-ghost{background:var(--card);border-color:var(--line);color:var(--muted)}
.btn-danger{background:rgba(255,93,93,.12);color:var(--red);border-color:rgba(255,93,93,.25)}
.btn-sm{padding:9px 14px;font-size:13.5px;border-radius:10px}

/* ---------- bottom sheet ---------- */
.sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:95;
  background:var(--bg2);border-radius:22px 22px 0 0;border-top:1px solid var(--line);
  padding:10px 18px calc(22px + var(--safe-b));
  transform:translateY(105%);transition:transform .25s cubic-bezier(.32,.72,.34,1);
  max-height:88vh;overflow-y:auto;
  box-shadow:0 -10px 40px rgba(0,0,0,.5);
}
.sheet.open{transform:translateY(0)}
.sheet-grab{width:38px;height:4px;border-radius:99px;background:var(--muted2);margin:6px auto 14px;opacity:.6}
.sheet-title{font-size:17px;font-weight:800;margin-bottom:16px;text-align:center}
.sheet .field{margin-bottom:13px}
.sheet-actions{display:flex;gap:10px;margin-top:20px}

/* ---------- node picker ---------- */
.node-picker{display:flex;flex-direction:column;gap:8px;max-height:260px;overflow-y:auto;margin-bottom:4px}
.node-pick{
  display:flex;align-items:center;gap:10px;width:100%;text-align:left;
  background:var(--card);border:1.5px solid var(--line);border-radius:13px;padding:12px 13px;
  transition:border-color .12s;
}
.node-pick.selected{border-color:var(--accent);background:rgba(79,140,255,.08)}
.node-pick .pick-info{flex:1;min-width:0}
.pick-ip{font-size:13.5px;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pick-meta{font-size:11px;color:var(--muted);margin-top:1px}
.pick-radio{
  width:18px;height:18px;border-radius:50%;border:2px solid var(--muted2);flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;transition:all .12s;
}
.node-pick.selected .pick-radio{border-color:var(--accent)}
.node-pick.selected .pick-radio::after{content:"";width:9px;height:9px;border-radius:50%;background:var(--accent)}

/* ---------- confirm ---------- */
.confirm-card{
  position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);z-index:100;
  width:min(320px,86vw);background:var(--bg2);border:1px solid var(--line);border-radius:20px;
  padding:22px 18px 16px;box-shadow:var(--shadow);animation:pop .16s ease-out;
}
.confirm-title{font-size:16.5px;font-weight:800;text-align:center;margin-bottom:8px}
.confirm-text{font-size:13.5px;color:var(--muted);text-align:center;margin-bottom:18px;line-height:1.6;word-break:break-all}
.confirm-actions{display:flex;gap:10px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:calc(88px + var(--safe-b));transform:translateX(-50%) translateY(8px);
  background:#232c40;color:var(--text);padding:11px 20px;border-radius:99px;
  font-size:13.5px;font-weight:600;z-index:120;box-shadow:var(--shadow);
  opacity:0;transition:all .25s;max-width:86vw;text-align:center;pointer-events:none;
  border:1px solid rgba(255,255,255,.06);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast.error{background:#3a1f24;border-color:rgba(255,93,93,.35);color:#ffb3b3}

/* ---------- empty state ---------- */
.empty{
  text-align:center;padding:64px 20px;color:var(--muted2);
}
.empty .empty-icon{font-size:44px;margin-bottom:14px;opacity:.8}
.empty .empty-title{font-size:15px;font-weight:700;color:var(--muted);margin-bottom:6px}
.empty .empty-sub{font-size:12.5px;line-height:1.7}

/* ---------- misc ---------- */
.text-muted{color:var(--muted)}
.spacer{flex:1}
.divider{height:1px;background:var(--line);margin:14px 0}
.tip{font-size:12px;color:var(--muted2);line-height:1.7;background:var(--card);border:1px dashed var(--line);border-radius:11px;padding:10px 12px;margin-top:14px}
.tip b{color:var(--muted)}

@media (min-width:640px){
  .node-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
  #main{padding-left:22px;padding-right:22px}
}