:root{
  --bg:#0b0d11; --stage:#0f1218; --card:#161a22; --panel:#1b2029;
  --fg:#e8eaed; --muted:#94a0ad; --dim:#6b7582;
  --accent:#4f8cff; --accent-2:#3a6fe0; --green:#3fb950; --amber:#e3a008; --red:#f85149;
  --border:#262d38; --code:#0a0c10; --radius:16px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);-webkit-font-smoothing:antialiased;}
body{padding:0 0 60px;}

.app{max-width:560px;margin:0 auto;padding:0 18px;}

/* Header */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:24px 0 14px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;}
.logo{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--accent),#7b5bff);display:flex;align-items:center;justify-content:center;font-size:22px;box-shadow:0 6px 18px rgba(79,140,255,.35);}
.brand h1{font-size:20px;margin:0;letter-spacing:.5px;}
.brand-sub{font-size:13px;color:var(--muted);font-weight:400;}
.brand p{margin:2px 0 0;font-size:12.5px;color:var(--muted);}
.tag{font-size:11px;padding:4px 11px;border:1px solid var(--border);border-radius:999px;color:var(--muted);background:var(--card);white-space:nowrap;}
.tag.ok{color:var(--green);border-color:rgba(63,185,80,.4);}
.tag.bad{color:var(--red);border-color:rgba(248,81,73,.4);}

/* Panels */
.panel{display:none;flex-direction:column;margin-top:14px;}
.panel.show{display:flex;animation:fade .25s ease;}
@keyframes fade{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

/* Home */
.home-hero{text-align:center;margin-top:18px;}
.home-hero .big{font-size:26px;font-weight:700;letter-spacing:.5px;}
.home-hero .sub{color:var(--muted);font-size:13px;margin-top:10px;line-height:1.7;}
.home-hero .sub b{color:var(--fg);font-weight:600;}
.primary-btn{margin-top:26px;background:var(--accent);color:#fff;border:none;border-radius:13px;padding:15px;font-size:15px;font-weight:600;font-family:var(--font);cursor:pointer;box-shadow:0 8px 22px rgba(79,140,255,.35);width:100%;}
.primary-btn:active{transform:scale(.98);}
.or{text-align:center;color:var(--dim);font-size:12px;margin:16px 0 4px;display:flex;align-items:center;gap:10px;}
.or::before,.or::after{content:"";flex:1;height:1px;background:var(--border);}
.join-row{display:flex;gap:9px;}
.join-input{flex:1;background:var(--code);border:1px solid var(--border);border-radius:12px;padding:14px;color:var(--fg);font-size:18px;letter-spacing:6px;text-align:center;font-family:var(--font);text-transform:uppercase;}
.join-input::placeholder{color:var(--dim);letter-spacing:2px;font-size:13px;text-align:center;text-transform:none;}
.join-btn{background:var(--panel);border:1px solid var(--border);color:var(--fg);border-radius:12px;padding:0 18px;font-size:14px;font-weight:600;font-family:var(--font);cursor:pointer;white-space:nowrap;}
.join-btn:active{transform:scale(.97);}
.trust{margin-top:auto;display:flex;align-items:center;justify-content:center;gap:7px;color:var(--dim);font-size:11px;padding-top:22px;}

/* Create room */
.room-head{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted);}
.room-head .back{width:26px;height:26px;border-radius:8px;background:var(--panel);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--fg);cursor:pointer;font-size:15px;}
.qr-wrap{margin:20px auto;width:200px;height:200px;background:#fff;border-radius:16px;padding:12px;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 30px rgba(0,0,0,.4);}
.qr-wrap canvas,.qr-wrap img{width:100%!important;height:100%!important;image-rendering:pixelated;display:block;}
.qr-canvas{width:180px;height:180px;margin:0 auto;}
.code-box{text-align:center;}
.code-box .label{font-size:12px;color:var(--dim);}
.code-box .code{font-size:38px;font-weight:700;letter-spacing:10px;margin-top:4px;font-variant-numeric:tabular-nums;color:var(--accent);}
.status-pill{margin:16px auto 0;display:inline-flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--border);border-radius:999px;padding:8px 16px;font-size:12.5px;color:var(--muted);align-self:center;}
.dot-pulse{width:8px;height:8px;border-radius:50%;background:var(--amber);animation:pulse 1.4s infinite;}
.dot-green{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.25;}}
.wake-tip{margin-top:18px;background:rgba(79,140,255,.08);border:1px solid rgba(79,140,255,.25);border-radius:11px;padding:11px 13px;font-size:12px;color:#b9caff;display:flex;gap:9px;align-items:flex-start;line-height:1.5;}
.placeholder{font-size:11px;color:var(--dim);text-align:center;margin-top:18px;line-height:1.6;}

/* Connected / peer list */
.conn-title{font-size:17px;font-weight:700;margin-bottom:4px;}
.conn-sub{font-size:12.5px;color:var(--muted);margin-bottom:16px;}
.peer{border:1px solid var(--border);border-radius:13px;padding:14px;display:flex;align-items:center;gap:13px;background:var(--panel);}
.peer .av{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#2a3140,#1c2330);display:flex;align-items:center;justify-content:center;font-size:21px;flex:none;}
.peer .meta b{font-size:14px;}
.peer .meta div{font-size:11.5px;color:var(--green);margin-top:2px;display:flex;align-items:center;gap:5px;}

/* Dropzone */
.dropzone{margin-top:16px;border:2px dashed var(--border);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--dim);text-align:center;gap:8px;padding:34px 16px;transition:.2s;cursor:pointer;}
.dropzone.drag{border-color:var(--accent);color:var(--accent);background:rgba(79,140,255,.06);}
.dropzone svg{width:38px;height:38px;}
.dropzone .t1{font-size:14px;color:var(--fg);font-weight:600;}
.dropzone .t2{font-size:12px;}

/* File card */
.file-card{border:1px solid var(--border);border-radius:13px;padding:13px;background:var(--panel);margin-top:14px;}
.file-card .row1{display:flex;align-items:center;gap:11px;}
.file-card .fic{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#33405a,#222b3d);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none;}
.file-card .fname{font-size:13.5px;font-weight:600;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.file-card .fsize{font-size:11.5px;color:var(--dim);white-space:nowrap;}
.bar{height:7px;background:var(--code);border-radius:99px;margin-top:11px;overflow:hidden;}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),#7b5bff);border-radius:99px;transition:width .25s;}
.fstat{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:7px;}
.fstat .spd{color:var(--accent);}
.verify{font-size:11.5px;color:var(--dim);display:flex;align-items:center;gap:6px;margin-top:6px;}
.cancel-btn{margin-top:8px;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:9px;padding:6px 12px;font-size:12px;cursor:pointer;font-family:var(--font);}
.cancel-btn:active{transform:scale(.97);}

/* M5 连接校验（紧凑版：核心常驻 + 详情按需展开）*/
.verify-box{margin-top:12px;border:1px solid var(--border);border-radius:12px;background:var(--panel);padding:10px 12px;}
.verify-head{display:flex;align-items:center;justify-content:space-between;gap:8px;}
.verify-title{font-size:12.5px;font-weight:600;display:flex;align-items:center;gap:7px;color:var(--fg);}
.verify-status{font-size:10.5px;padding:1px 8px;border-radius:999px;border:1px solid var(--border);color:var(--muted);}
.verify-status.ok{color:var(--green);border-color:rgba(63,185,80,.4);background:rgba(63,185,80,.1);}
.verify-status.bad{color:var(--red);border-color:rgba(248,81,73,.4);background:rgba(248,81,73,.1);}
.verify-status.wait{color:var(--amber);border-color:rgba(227,160,8,.35);background:rgba(227,160,8,.1);}
.verify-toggle{flex:none;background:transparent;border:0;padding:2px;font-size:11.5px;font-family:var(--font);color:var(--dim);cursor:pointer;}
.verify-toggle:hover{color:var(--muted);}
.pin-row{display:flex;gap:8px;margin-top:8px;}
.pin-card{flex:1;border:1px solid var(--border);border-radius:9px;padding:7px 8px;text-align:center;background:var(--card);}
.pin-label{font-size:10px;color:var(--muted);margin-bottom:3px;}
.pin{font-size:20px;font-weight:700;letter-spacing:4px;line-height:1.25;font-variant-numeric:tabular-nums;color:var(--accent);}
.verify-hint{margin-top:8px;font-size:11.5px;color:var(--muted);line-height:1.5;}
.verify-hint.ok{color:var(--green);}
.verify-hint.bad{color:var(--red);}
.verify-actions{display:flex;gap:8px;margin-top:8px;}
.btn-ok,.btn-warn{flex:1;border-radius:9px;padding:8px;font-size:12.5px;font-weight:600;font-family:var(--font);cursor:pointer;border:1px solid var(--border);}
.btn-ok{background:rgba(63,185,80,.14);color:var(--green);border-color:rgba(63,185,80,.4);}
.btn-warn{background:rgba(248,81,73,.12);color:var(--red);border-color:rgba(248,81,73,.4);}
.btn-ok:active,.btn-warn:active{transform:scale(.98);}

/* 详情展开区（设备身份 + 信任徽章 + 说明）*/
.verify-detail{margin-top:9px;padding-top:9px;border-top:1px solid var(--border);}
.verify-devices{display:flex;flex-direction:column;gap:4px;}
.verify-devices .vd{display:flex;gap:8px;align-items:center;font-size:11px;color:var(--muted);}
.verify-devices .vdl{flex:none;width:28px;color:var(--dim);}
.verify-devices .vd span:last-child{color:var(--fg);font-variant-numeric:tabular-nums;}
.trust-badge{margin-bottom:8px;font-size:11.5px;padding:7px 10px;border-radius:9px;border:1px solid var(--border);line-height:1.45;}
.trust-badge.ok{color:var(--green);border-color:rgba(63,185,80,.4);background:rgba(63,185,80,.1);}
.trust-badge.warn{color:var(--amber);border-color:rgba(227,160,8,.35);background:rgba(227,160,8,.1);}
.trust-badge.new{color:var(--muted);background:var(--card);}
.verify-note{margin-top:8px;font-size:10.5px;color:var(--dim);line-height:1.45;}

/* 房间码输入纠错 + 复制（避免带「·」的显示码被粘贴截断后静默失败）*/
.join-err{margin-top:8px;min-height:16px;font-size:12px;color:var(--red);text-align:center;line-height:1.5;}
.code-copy{margin-top:12px;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:9px;padding:7px 14px;font-size:12px;font-family:var(--font);cursor:pointer;}
.code-copy:active{transform:scale(.97);}