:root{color-scheme:light;--bg:#f4f7f8;--surface:#fff;--text:#243b45;--muted:#617681;--line:#e2eaed;--accent:#087f78;--soft:#eaf7f3;--danger:#a75050}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
body{min-height:100vh;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.5}
button,input,textarea{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
[hidden]{display:none!important}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(430px,100%);padding:34px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:0 20px 70px #29445112}.brand-dot{width:34px;height:5px;background:var(--accent);border-radius:10px;margin-bottom:22px}.login-card h1{font-size:24px}.login-card p{color:var(--muted);margin:10px 0 24px}.login-card label,.modal label{display:block;color:var(--muted);font-size:13px;margin:14px 0 7px}.login-card input,.modal input,.modal textarea{width:100%;border:1px solid var(--line);border-radius:10px;background:#f8fafb;padding:12px;color:var(--text)}.primary,.btn-save{width:100%;margin-top:18px;padding:12px;border:0;border-radius:10px;background:var(--accent);color:#fff;font-weight:650}.form-error{min-height:24px;color:var(--danger);font-size:13px;margin-top:12px}
#appView{max-width:840px;margin:auto;min-height:100vh}.header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;padding:36px 28px 22px}.header h1{font-size:25px;font-weight:650}.info{font-size:12px;color:var(--muted);margin-top:12px;line-height:1.9}.count,.remaining,#syncState{color:var(--accent);font-weight:600}.quiet-button{border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--muted);padding:8px 12px}.countdown-bar{height:3px;margin:0 28px 18px;background:var(--line);border-radius:3px;overflow:hidden}.countdown-fill{height:100%;width:100%;background:#51b8a5;transition:width 1s linear}.search-bar{padding:0 28px 12px}.search-bar input{width:100%;border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--surface);color:var(--text)}.backup-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:0 28px 22px}.backup-btn{min-height:44px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--muted);font-size:13px;font-weight:500}.backup-btn:hover{background:var(--soft);color:var(--accent)}
.tenant-list{padding:0 28px 110px}.tenant-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;margin-bottom:16px;box-shadow:0 5px 20px #23465205}.tenant-top{display:flex;justify-content:space-between;gap:12px;margin-bottom:18px}.tenant-name{font-weight:650;overflow-wrap:anywhere}.pin{font-size:11px;color:var(--muted);background:#f3f6f7;padding:4px 9px;border-radius:6px;white-space:nowrap}.code{display:block;font-size:42px;font-weight:500;letter-spacing:7px;color:var(--accent);font-variant-numeric:tabular-nums}.actions{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:8px;align-items:center;margin-top:18px;padding-top:18px;border-top:1px solid #eef2f4}.remote{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border:1px solid #cce5dd;border-radius:999px;background:var(--soft);color:var(--accent);padding:9px 12px;text-align:left}.copy,.delete{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:12px;white-space:nowrap}.copy{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.delete{background:#fff;color:var(--danger)}.empty{text-align:center;padding:48px 24px 120px;color:var(--muted)}.empty .icon{font-size:36px;margin-bottom:16px}
.bottom-bar{position:fixed;left:50%;bottom:0;transform:translateX(-50%);display:flex;gap:12px;width:100%;max-width:840px;padding:16px 28px calc(16px + env(safe-area-inset-bottom));background:#ffffffed;border-top:1px solid var(--line);backdrop-filter:blur(16px)}.bottom-bar button{flex:1;padding:13px;border-radius:12px;font-weight:600}.btn-add{background:var(--accent);border:1px solid var(--accent);color:#fff}.btn-mgmt{background:#f2f6f7;border:1px solid var(--line);color:var(--text)}
.modal-overlay{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;background:#304d5b45;backdrop-filter:blur(4px)}.modal-overlay.show{display:flex}.modal{width:min(500px,100%);max-height:85vh;overflow:auto;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:0 20px 70px #29445120}.modal h2{font-size:20px;margin-bottom:20px}.btn-row{display:flex;gap:10px;margin-top:18px}.btn-row button{flex:1;padding:12px;border:1px solid var(--line);border-radius:10px;background:#f2f6f7;color:var(--text)}.btn-row .btn-save{margin:0;background:var(--accent);color:#fff;border-color:var(--accent)}.section-title{font-size:13px;font-weight:650;margin:20px 0 10px;padding-top:18px;border-top:1px solid var(--line)}.hint{font-size:12px;color:var(--muted);line-height:1.7}.warning{margin-top:14px}.management-item{display:flex;justify-content:space-between;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}.management-item small{display:block;color:var(--muted);font-family:monospace;margin-top:3px}.management-item button{border:0;background:none;color:var(--danger);padding:8px}.toast{position:fixed;z-index:200;left:50%;bottom:100px;transform:translateX(-50%);max-width:calc(100vw - 32px);padding:12px 20px;border:1px solid #bddcd4;border-radius:14px;background:var(--soft);color:#116258;opacity:0;pointer-events:none;transition:opacity .2s}.toast.show{opacity:1}
@media(max-width:560px){.header{padding:26px 18px 18px}.header h1{font-size:22px}.countdown-bar{margin-left:18px;margin-right:18px}.search-bar,.backup-actions{padding-left:18px;padding-right:18px}.tenant-list{padding-left:16px;padding-right:16px}.tenant-card{padding:18px}.code{font-size:36px;letter-spacing:5px}.actions{grid-template-columns:1fr 1fr}.remote{grid-column:1/-1}.bottom-bar{padding-left:18px;padding-right:18px}.modal-overlay{align-items:flex-end;padding:0}.modal{border-radius:20px 20px 0 0;padding:22px 20px calc(22px + env(safe-area-inset-bottom))}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}