:root{
  --primary:rgb(204, 0, 51);
  --primaryHover:rgb(178, 0, 44);
  --dark:#282830;
  --light:#F8F8F8;
  --border:#E5E5E5;
  --text:#1f1f1f;
  --muted:#737373;
  --card:#ffffff;
  --shadow: 0 10px 30px rgba(16, 24, 40, 0.10);
  --shadow2: 0 1px 0 rgba(16, 24, 40, 0.06), 0 12px 28px rgba(16, 24, 40, 0.08);
  --radius: 14px;
  --radiusSm: 10px;
  --ring: 0 0 0 4px rgba(204, 0, 51, 0.15);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  background:
    radial-gradient(1200px 600px at 15% 5%, rgba(204,0,51,0.10) 0%, rgba(204,0,51,0.00) 60%),
    radial-gradient(900px 500px at 85% 15%, rgba(40,40,48,0.10) 0%, rgba(40,40,48,0.00) 55%),
    linear-gradient(180deg, #ffffff 0%, #F6F7FB 42%, #ffffff 100%);
  color:var(--text);
}
.app{
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.topbar{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter:saturate(160%) blur(10px);
  background:linear-gradient(180deg, rgba(31,31,36,0.92) 0%, rgba(40,40,48,0.92) 100%);
  color:#fff;
  padding:12px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand .logo{
  height:26px;
  width:auto;
  display:block;
  background:rgba(255,255,255,0.95);
  padding:6px 10px;
  border-radius: var(--radiusSm);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}
.brand .accent{
  width:4px;
  height:28px;
  background:var(--primary);
}
.brand h1{
  margin:0;
  font-size:18px;
  font-weight:300;
  letter-spacing:.02em;
  text-transform:uppercase;
}
.topbar .actions{
  display:flex;
  gap:10px;
  align-items:center;
}
.btn{
  border:0;
  border-radius: 12px;
  padding:10px 14px;
  cursor:pointer;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing: .02em;
  transition: transform .08s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primaryHover); box-shadow: 0 10px 20px rgba(204,0,51,0.20)}
.btn:active{transform: translateY(1px)}
.btn-ghost{background:rgba(255,255,255,0.06);color:#fff;border:1px solid rgba(255,255,255,.18)}
.btn-ghost:hover{border-color:rgba(255,255,255,.35); background:rgba(255,255,255,0.10)}
.container{
  width:100%;
  max-width:1600px;
  margin:0 auto;
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.card{
  background: var(--card);
  border:1px solid rgba(16, 24, 40, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow2);
}
.card-header{
  padding:12px 14px;
  border-bottom:1px solid rgba(16, 24, 40, 0.08);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
}
.card-header h2{
  margin:0;
  font-size:14px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.02em;
  color:var(--dark);
}
.card-body{padding:14px}
.grid{
  display:grid;
  grid-template-columns:repeat(8,minmax(0,1fr));
  gap:10px;
}
.field label{
  display:block;
  font-size:12px;
  color:var(--muted);
  margin-bottom:6px;
}
.field input,.field select,.field textarea{
  width:100%;
  height:34px;
  border:1px solid rgba(16, 24, 40, 0.10);
  border-radius: 12px;
  padding:6px 8px;
  font-size:14px;
  outline:none;
  background: rgba(255,255,255,0.9);
  transition: box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.field textarea{height:80px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color: rgba(204,0,51,0.45);
  box-shadow: var(--ring);
  background:#fff;
}
.layout{
  display:grid;
  grid-template-columns:1fr 2fr;
  gap:16px;
}
.tabs{
  display:flex;
  gap:8px;
  padding:6px;
  background: rgba(16,24,40,0.04);
  border: 1px solid rgba(16,24,40,0.08);
  border-radius: 999px;
}
.tabs.tabs-mode{
  background: linear-gradient(180deg, rgba(120,0,32,0.96) 0%, rgba(88,0,24,0.96) 100%);
  border-color: rgba(204,0,51,0.55);
  box-shadow: 0 12px 28px rgba(120,0,32,0.22);
}
.tabs.tabs-mode .tab{
  color: rgba(255,255,255,0.88);
  text-shadow: 0 1px 0 rgba(0,0,0,0.25);
}
.tabs.tabs-mode .tab:hover{
  background: rgba(255,255,255,0.10);
}
.tabs.tabs-mode .tab.active{
  background: rgba(255,255,255,0.16);
  color: #fff;
  box-shadow: 0 10px 22px rgba(0,0,0,0.22);
  outline: 1px solid rgba(255,255,255,0.20);
}
.tab{
  flex:1;
  padding:10px 12px;
  border: 0;
  background: transparent;
  cursor:pointer;
  text-transform:uppercase;
  font-weight:700;
  font-size:12px;
  letter-spacing:.02em;
  border-radius: 999px;
  transition: background .18s ease, color .18s ease, box-shadow .18s ease;
}
.tab.active{
  background: #fff;
  box-shadow: 0 10px 22px rgba(16,24,40,0.10);
  color: var(--dark);
}
.panel{
  border-top:1px solid rgba(16,24,40,0.08);
  padding:14px;
}
.template-list{
  list-style:none;
  padding:0;
  margin:0;
  max-height:320px;
  overflow:auto;
  border:1px solid rgba(16,24,40,0.08);
  border-radius: 12px;
  background:#fff;
}
.template-list li{
  border-bottom:1px solid rgba(16,24,40,0.06);
}
.template-list button{
  width:100%;
  border:0;
  background:#fff;
  text-align:left;
  padding:10px 12px;
  cursor:pointer;
  font-size:14px;
}
.template-list button:hover{background:var(--light)}
.template-list button.active{
  background:#FFF3F3;
  border-left:4px solid var(--primary);
  padding-left:8px;
}
.preview-wrap{
  border:1px solid rgba(16,24,40,0.08);
  border-radius: 12px;
  height:520px;
  background:#fff;
  overflow:hidden;
}
.preview-meta{
  color:var(--muted);
  font-size:13px;
}
.subject-line{
  margin-bottom:10px;
  padding:10px 12px;
  border:1px solid rgba(16,24,40,0.08);
  border-radius: 12px;
  background: rgba(16,24,40,0.03);
  color: var(--dark);
  font-size: 13px;
  font-weight: 700;
}
.unsub-table th, .unsub-table td{
  padding:10px;
  border-bottom:1px solid rgba(16,24,40,0.08);
}
.unsub-table thead th{
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.02em;
  color: rgba(40,40,48,0.85);
  background: rgba(16,24,40,0.03);
}
.unsub-table tbody tr:hover{
  background: rgba(204,0,51,0.06);
}
.preview-iframe{
  width:100%;
  height:100%;
  border:0;
}
.preview-text{
  padding:12px;
  white-space:pre-wrap;
  font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  font-size:13px;
}
.statusbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:12px;
}
.muted{color:var(--muted);font-size:13px}
.login{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
}
.login-card{width:100%;max-width:520px}
.login-card .card-body{padding:22px}
.login-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:10px;
}
.login-brand img{
  height:36px;
  width:auto;
  background:#fff;
  padding:6px 10px;
  border:1px solid rgba(16,24,40,0.08);
  border-radius: 12px;
  box-shadow: var(--shadow);
}
.login-title{
  margin:0 0 8px;
  color:var(--primary);
  font-size:18px;
  text-transform:uppercase;
  letter-spacing:.02em;
  font-weight:300;
}
.login-sub{margin:0 0 16px;color:var(--muted)}
.row{
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:flex-end;
}
@media (max-width: 1200px){
  .grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .layout{grid-template-columns:1fr}
}
@media (max-width: 720px){
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}