:root{
  --color-white:#ffffff;
  --color-background:#f7f8fa;
  --color-surface:#ffffff;
  --color-surface-soft:#f1f3f5;
  --color-text-primary:#111827;
  --color-text-secondary:#4b5563;
  --color-text-muted:#6b7280;
  --color-border:#e5e7eb;
  --color-border-strong:#d1d5db;
  --color-primary:#1f2937;
  --color-primary-hover:#111827;
  --color-accent:#2563eb;
  --color-accent-hover:#1d4ed8;
  --color-success:#16a34a;
  --color-warning:#f59e0b;
  --color-error:#dc2626;
  --color-info:#0284c7;

  --bg:var(--color-background);
  --surface:var(--color-surface);
  --ink:var(--color-text-primary);
  --muted:var(--color-text-muted);
  --line:var(--color-border);
  --info:var(--color-accent);
  --info-bg:#eff6ff;
  --ok:var(--color-success);
  --ok-bg:#ecfdf3;
  --warn:var(--color-warning);
  --warn-bg:#fffbeb;
  --err:var(--color-error);
  --err-bg:#fef2f2;
  --radius:8px;
  --shadow-sm:0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 12px 30px rgba(17,24,39,.08);
}

*{box-sizing:border-box}
html{min-width:320px}
body{
  margin:0;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--color-background);
  color:var(--color-text-primary);
  line-height:1.6;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--color-accent);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
a:hover{color:var(--color-accent-hover)}
h1{
  color:var(--color-text-primary);
  font-size:clamp(1.75rem,1.45rem + .9vw,2.35rem);
  line-height:1.15;
  font-weight:700;
  letter-spacing:0;
  margin:28px 0 18px;
}

:focus-visible{
  outline:3px solid rgba(37,99,235,.18);
  outline-offset:2px;
}

.muted{color:var(--color-text-muted)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}
.nowrap{white-space:nowrap}
.inline{display:inline}

.topbar{
  min-height:72px;
  display:flex;
  align-items:center;
  gap:24px;
  background:rgba(255,255,255,.96);
  border-bottom:1px solid var(--color-border);
  padding:0 32px;
  position:sticky;
  top:0;
  z-index:5;
  backdrop-filter:saturate(180%) blur(12px);
}
.brand{
  display:flex;
  align-items:center;
  gap:9px;
  color:var(--color-text-primary);
  font-size:15px;
  font-weight:700;
  white-space:nowrap;
}
.dot{
  display:inline-block;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--color-accent);
  box-shadow:0 0 0 4px rgba(37,99,235,.12);
  flex:none;
}
.nav{display:flex;align-items:center;gap:4px;margin-left:4px}
.nav-link{
  min-height:40px;
  display:inline-flex;
  align-items:center;
  border:1px solid transparent;
  border-radius:8px;
  color:var(--color-text-secondary);
  font-size:14px;
  font-weight:500;
  padding:8px 12px;
}
.nav-link:hover{background:var(--color-surface-soft);color:var(--color-text-primary)}
.nav-link.active{
  background:#eff6ff;
  border-color:#dbeafe;
  color:var(--color-accent);
}
.logout{
  margin-left:auto;
  color:var(--color-text-muted);
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
}
.logout:hover{color:var(--color-text-primary)}

.container{
  width:min(100%,1220px);
  margin:0 auto;
  padding:24px 32px 72px;
}
.foot{
  border-top:1px solid var(--color-border);
  color:var(--color-text-muted);
  font-size:12px;
  padding:24px 16px;
  text-align:center;
}

.stats{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
  margin:12px 0 28px;
}
.stat,.card,.empty,.login-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
}
.stat{min-height:116px;padding:20px}
.stat-l{
  color:var(--color-text-muted);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.stat-v{
  color:var(--color-text-primary);
  font-size:34px;
  font-weight:700;
  line-height:1.15;
  margin-top:8px;
}
.stat-v.small{font-size:19px;line-height:1.35}
.stat-note{color:var(--color-text-muted);font-size:13px;margin-top:6px}
.stat-v.warn{color:var(--color-warning)}
.stat-v.ok{color:var(--color-success)}

.feed{display:flex;flex-direction:column;gap:18px;margin-top:18px}
.card{padding:24px}
.conv-head,.prop-head{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.avatar{
  width:40px;
  height:40px;
  border-radius:50%;
  background:#eff6ff;
  color:var(--color-accent);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:13px;
  font-weight:700;
  flex:none;
}
.conv-meta{flex:1;min-width:0}
.conv-name{font-size:15px;font-weight:700}
.conv-sub{color:var(--color-text-muted);font-size:13px}

.badge{
  display:inline-flex;
  align-items:center;
  min-height:26px;
  border:1px solid var(--color-border);
  border-radius:8px;
  background:var(--color-surface-soft);
  color:var(--color-text-secondary);
  font-size:12px;
  font-weight:600;
  padding:3px 9px;
  white-space:nowrap;
}
.badge.warn{background:var(--warn-bg);border-color:#fde68a;color:#92400e}
.badge.ok{background:var(--ok-bg);border-color:#bbf7d0;color:#166534}
.badge.info{background:#eff6ff;border-color:#bfdbfe;color:var(--color-accent)}
.badge.err{background:var(--err-bg);border-color:#fecaca;color:var(--color-error)}
.badge.unread-badge{background:#ecfdf3;border-color:#bbf7d0;color:#166534}

.guest-msg,.draft,.test-out{
  background:var(--color-surface-soft);
  border-radius:8px;
  color:var(--color-text-primary);
  font-size:14px;
  padding:12px 14px;
}
.guest-msg{margin-bottom:12px}
.draft{border-left:3px solid var(--color-accent);border-radius:0 8px 8px 0;margin-bottom:14px}
.draft-label{color:var(--color-text-muted);font-size:12px;font-weight:600;margin-bottom:6px}

label{
  display:block;
  color:var(--color-text-secondary);
  font-size:13px;
  font-weight:600;
  margin:14px 0 6px;
}
textarea,input[type=text],input[type=password],select{
  width:100%;
  min-height:44px;
  border:1px solid var(--color-border);
  border-radius:8px;
  background:var(--color-surface);
  color:var(--color-text-primary);
  font:inherit;
  font-size:15px;
  padding:10px 12px;
  resize:vertical;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
textarea{line-height:1.55}
select{appearance:auto}
textarea::placeholder,input::placeholder{color:#9ca3af}
textarea:hover,input[type=text]:hover,input[type=password]:hover,select:hover{border-color:var(--color-border-strong)}
textarea:focus,input:focus,select:focus{
  border-color:var(--color-accent);
  box-shadow:0 0 0 3px rgba(37,99,235,.16);
  outline:none;
}

.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn{
  min-height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--color-border);
  border-radius:8px;
  background:var(--color-surface);
  color:var(--color-text-primary);
  cursor:pointer;
  font:inherit;
  font-size:14px;
  font-weight:600;
  line-height:1.2;
  padding:10px 16px;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn:hover{background:var(--color-surface-soft);border-color:var(--color-border-strong)}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}
.btn.primary:hover{background:var(--color-primary-hover);border-color:var(--color-primary-hover)}
.btn:disabled,.btn[disabled]{
  cursor:not-allowed;
  opacity:.55;
  transform:none;
}
.act-status{font-size:13px;font-weight:600}

.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.auto-wrap{display:flex;align-items:flex-end}
.switch{display:flex;align-items:center;gap:9px;color:var(--color-text-primary);font-size:14px;margin:0}
.switch input{width:auto;accent-color:var(--color-accent)}
.row-between{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.row-between h1{margin-bottom:0}
.empty{
  color:var(--color-text-primary);
  margin-top:18px;
  padding:36px 24px;
  text-align:center;
}
.alert{
  border:1px solid transparent;
  border-radius:8px;
  font-size:14px;
  margin:14px 0;
  padding:12px 14px;
}
.alert.ok{background:var(--ok-bg);border-color:#bbf7d0;color:#166534}
.alert.err,.alert.danger{background:var(--err-bg);border-color:#fecaca;color:#991b1b}
.alert.soft{background:var(--warn-bg);border-color:#fde68a;color:#92400e}

.table{
  width:100%;
  border:1px solid var(--color-border);
  border-collapse:separate;
  border-radius:var(--radius);
  border-spacing:0;
  background:var(--color-surface);
  box-shadow:var(--shadow-sm);
  display:block;
  font-size:14px;
  margin-top:18px;
  overflow:auto;
}
.table thead,.table tbody,.table tr{width:100%}
.table th,.table td{
  border-bottom:1px solid var(--color-border);
  padding:13px 14px;
  text-align:left;
  vertical-align:top;
}
.table th{
  background:var(--color-surface-soft);
  color:var(--color-text-secondary);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
  white-space:nowrap;
}
.table tr:last-child td{border-bottom:0}
.table tbody tr:hover{background:#fafafa}
.msg-cell{max-width:420px;min-width:260px}
.check-ok{color:var(--color-success);font-weight:700}
.check-warn{color:#b45309;font-weight:700}
.check-err{color:var(--color-error);font-weight:700}

.test-zone{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.test-out{white-space:pre-wrap}

.inbox-list{display:flex;flex-direction:column;gap:12px;margin-top:12px}
.inbox-item{
  display:flex;
  gap:18px;
  justify-content:space-between;
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  color:var(--color-text-primary);
  padding:18px 20px;
  transition:background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.inbox-item:hover{
  background:#fcfcfd;
  border-color:var(--color-border-strong);
  box-shadow:0 8px 24px rgba(17,24,39,.07);
  color:var(--color-text-primary);
  transform:translateY(-1px);
}
.inbox-item.unread{
  background:#f8fffb;
  border-color:#bbf7d0;
  box-shadow:inset 4px 0 0 var(--color-success),var(--shadow-sm);
}
.inbox-main{min-width:0;flex:1}
.inbox-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px}
.inbox-guest{font-size:15px;font-weight:700}
.inbox-time{color:var(--color-text-muted);font-size:12px;white-space:nowrap}
.inbox-property{font-size:14px;font-weight:700;margin-top:3px}
.inbox-stay{color:var(--color-text-muted);font-size:13px}
.inbox-preview{
  color:var(--color-text-secondary);
  font-size:14px;
  margin-top:8px;
  overflow:hidden;
}
.inbox-side{display:flex;flex-direction:column;align-items:flex-end;gap:7px;flex:none}

.conversation-head{margin-top:6px}
.back-link{
  display:inline-flex;
  align-items:center;
  color:var(--color-text-muted);
  font-size:14px;
  font-weight:600;
  margin-bottom:8px;
}
.conversation-head h1{margin:6px 0 10px}
.conversation-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--color-text-muted);font-size:13px}
.conversation-meta span{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:8px;
  padding:5px 9px;
}

.thread{display:flex;flex-direction:column;gap:12px;margin:22px 0 18px}
.message-row{display:block}
.message-card{
  background:var(--color-surface);
  border:1px solid var(--color-border);
  border-radius:8px;
  box-shadow:var(--shadow-sm);
  padding:14px 16px;
}
.message-row.guest .message-card{border-left:4px solid var(--color-success);background:#fbfffd}
.message-row.owner .message-card{border-left:4px solid var(--color-accent);background:#fbfdff}
.message-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  color:var(--color-text-muted);
  font-size:12px;
  margin-bottom:7px;
}
.message-meta strong{color:var(--color-text-primary);font-size:13px}
.message-body{font-size:15px;white-space:pre-wrap;word-break:break-word}
.reply-panel{
  position:sticky;
  bottom:0;
  background:rgba(255,255,255,.98);
  border:1px solid var(--color-border);
  border-radius:8px 8px 0 0;
  box-shadow:0 -14px 32px rgba(17,24,39,.09);
  margin:22px 0 0;
  padding:16px;
  backdrop-filter:saturate(180%) blur(12px);
}
.reply-panel label{margin-top:0}
.quick-replies{display:flex;gap:8px;overflow-x:auto;padding-bottom:10px;margin-bottom:6px}
.quick-btn{
  min-height:36px;
  border:1px solid var(--color-border);
  border-radius:999px;
  background:var(--color-surface-soft);
  color:var(--color-text-primary);
  cursor:pointer;
  flex:none;
  font:inherit;
  font-size:13px;
  font-weight:600;
  padding:7px 12px;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.quick-btn:hover{background:#eff6ff;border-color:#bfdbfe;color:var(--color-accent)}
.section-title{font-size:18px;font-weight:700;margin:24px 0 10px}
.log-grid{display:flex;flex-direction:column;gap:18px}
.log-box{
  max-height:420px;
  overflow:auto;
  border-radius:8px;
  background:#111827;
  color:#f9fafb;
  font-size:12px;
  line-height:1.5;
  padding:14px;
}

.login-body{
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:100vh;
  padding:24px;
}
.login-card{
  width:min(100%,380px);
  display:flex;
  flex-direction:column;
  padding:30px;
}
.login-brand{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:16px;
  font-weight:700;
  margin-bottom:18px;
}
.login-card .btn{margin-top:18px}

@media(max-width:1024px){
  .topbar{padding:0 24px}
  .container{padding-left:24px;padding-right:24px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:760px){
  .topbar{
    align-items:flex-start;
    flex-wrap:wrap;
    gap:10px 14px;
    min-height:0;
    padding:12px 16px;
  }
  .brand{min-height:40px}
  .nav{
    order:3;
    width:100%;
    margin-left:0;
    overflow-x:auto;
    padding-bottom:4px;
  }
  .nav-link{flex:none}
  .logout{min-height:40px;display:inline-flex;align-items:center;margin-left:auto}
  .container{padding:18px 16px 56px}
  .stats{grid-template-columns:1fr;gap:12px}
  .stat{min-height:auto;padding:16px}
  .card{padding:18px}
  .grid2{grid-template-columns:1fr;gap:12px}
  .inbox-item{padding:16px;flex-direction:column}
  .inbox-side{flex-direction:row;align-items:center;justify-content:flex-start;flex-wrap:wrap}
  .inbox-top{align-items:flex-start;flex-direction:column;gap:2px}
  .message-meta{align-items:flex-start;flex-direction:column;gap:2px}
  .reply-panel{border-radius:8px;margin-left:-8px;margin-right:-8px;padding:14px}
}

@media(max-width:520px){
  h1{font-size:1.75rem}
  .row-between{align-items:stretch}
  .row-between .inline,.row-between .btn{width:100%}
  .actions{align-items:stretch;flex-direction:column}
  .actions .btn{width:100%}
  .login-card{padding:24px}
}