:root{
  --bg:#f6fbff;
  --card:#ffffff;
  --primary:#0b74de;
  --muted:#6b7280;
  --accent:#06b6d4;
  --radius:10px;
  --max-width:1100px;
  --gap:16px;
  font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg,var(--bg),#eef7ff);
  color:#0f172a;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
}
.container{max-width:var(--max-width);margin:0 auto;padding:24px}
.site-header{background:transparent;padding:12px 0}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.brand{font-weight:700;color:var(--primary);text-decoration:none;font-size:1.25rem}
.nav-btn{background:transparent;border:0;padding:8px 12px;margin-left:8px;border-radius:8px;cursor:pointer}
.nav-btn.primary{background:var(--primary);color:#fff}
.hero{padding:48px;background:linear-gradient(90deg,rgba(11,116,222,0.08),rgba(6,182,212,0.04));border-radius:12px;margin-bottom:20px}
.hero-title{margin:0 0 8px;font-size:1.75rem}
.hero-sub{margin:0 0 16px;color:var(--muted)}
.hero-actions .btn{margin-right:8px}
.btn{display:inline-block;padding:10px 14px;border-radius:8px;border:1px solid rgba(15,23,42,0.06);background:#fff;cursor:pointer}
.btn.primary{background:var(--primary);color:#fff;border-color:transparent}
.btn.large{padding:12px 18px;font-size:1rem}
.panel{background:var(--card);padding:18px;border-radius:12px;margin-bottom:16px;box-shadow:0 6px 18px rgba(11,74,122,0.06)}
label{display:block;margin:10px 0 6px;font-weight:600}
input[type="text"],input[type="email"],input[type="search"],textarea{
  width:100%;padding:10px;border-radius:8px;border:1px solid #e6eef8;background:#fbfdff;
}
.row{display:flex;gap:12px;margin-top:12px}
.message-list{list-style:none;padding:0;margin:12px 0;display:grid;gap:8px}
.message-item{display:flex;justify-content:space-between;align-items:center;padding:12px;border-radius:10px;border:1px solid #eef6ff;background:linear-gradient(180deg,#fff,#fbfdff);cursor:pointer}
.message-item:hover{box-shadow:0 6px 18px rgba(11,74,122,0.06)}
.message-sub{color:var(--muted);font-size:0.95rem}
.inbox-controls{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.message-view{margin-top:12px;padding:12px;border-radius:8px;border:1px dashed #e6f2ff;background:#fff}
.toast{position:fixed;right:20px;bottom:20px;background:#0b74de;color:#fff;padding:12px 16px;border-radius:8px;box-shadow:0 8px 24px rgba(11,74,222,0.18)}
.site-footer{padding:18px 0;text-align:center;color:var(--muted)}
@media (max-width:700px){
  .row{flex-direction:column}
  .header-inner{flex-direction:column;gap:12px;align-items:flex-start}
  .hero{padding:24px}
}