:root{
  --bg:#f4f5f8; --panel:#ffffff; --ink:#0a0e1a; --muted:#5b6478; --faint:#8a92a3;
  --border:#e6e8ed; --border-2:#eef0f4; --accent:#4f46e5; --accent-soft:#ecebfd;
  --sidebar:#0b0e16; --sidebar-fg:#c9cede; --sidebar-active:rgba(255,255,255,.08);
  --ok:#16a34a; --ok-soft:#dcfce7; --danger:#dc2626; --danger-soft:#fee2e2;
  --shadow:0 1px 2px rgba(16,20,40,.04),0 8px 30px rgba(16,20,40,.05);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Inter",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}

/* ---- login gate ---- */
.gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;
  background:radial-gradient(at 30% 12%,rgba(79,70,229,.16),transparent 45%),var(--bg)}
.gate-card{width:100%;max-width:360px;background:var(--panel);border:1px solid var(--border);
  border-radius:16px;padding:34px 30px;box-shadow:var(--shadow);text-align:center}
.gate-logo{background:var(--sidebar);border-radius:9px;padding:6px;margin-bottom:16px}
.gate-card h1{margin:0;font-size:19px;font-weight:650;letter-spacing:-.01em}
.gate-card .muted{margin:6px 0 18px;font-size:13px}
.gate form{display:flex;flex-direction:column;gap:12px}

/* ---- app shell ---- */
.app{display:grid;grid-template-columns:236px 1fr;min-height:100vh}
.sidebar{background:var(--sidebar);color:var(--sidebar-fg);display:flex;flex-direction:column;padding:22px 16px}
.brand{padding:4px 8px}
.side-sub{font-size:10.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:rgba(255,255,255,.35);padding:6px 8px 18px}
.nav{display:flex;flex-direction:column;gap:2px;flex:1}
.nav-item{padding:9px 12px;border-radius:9px;font-size:13.5px;font-weight:550;color:var(--sidebar-fg)}
.nav-item:hover{background:rgba(255,255,255,.05);color:#fff}
.nav-item.active{background:var(--sidebar-active);color:#fff}
.side-foot{border-top:1px solid rgba(255,255,255,.08);padding-top:14px;margin-top:14px;display:flex;flex-direction:column;gap:10px}
.smtp-state{font-size:12px;color:rgba(255,255,255,.6);display:flex;align-items:center;gap:8px}
.link-btn{background:none;border:0;color:rgba(255,255,255,.5);font:inherit;font-size:12px;cursor:pointer;text-align:left;padding:0}
.link-btn:hover{color:#fff}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}
.dot.ok{background:#34d399} .dot.off{background:#6b7280}

.content{padding:34px 40px;max-width:860px}
.content.wide{max-width:1200px}
/* compose: form + live preview */
.compose{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:start}
.compose-form{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:16px}
.compose-right{position:sticky;top:34px}
.preview-label{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);margin-bottom:8px}
.preview-frame{width:100%;height:calc(100vh - 150px);min-height:500px;border:1px solid var(--border);border-radius:14px;background:#fff;box-shadow:var(--shadow);display:block}
.nowrap{white-space:nowrap}
.btn-mini + .btn-mini{margin-left:6px}
@media (max-width:960px){.compose{grid-template-columns:1fr}.compose-right{position:static}.preview-frame{height:72vh}}
.head{margin-bottom:20px}
.head h1{margin:0;font-size:22px;font-weight:650;letter-spacing:-.02em}
.head .muted{margin:5px 0 0}

.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow)}
.card.nopad{padding:0;overflow:hidden}
.card.empty{text-align:center;padding:40px}
.card.empty p{margin:0 0 6px}
.card.empty .btn{margin-top:16px}

.muted{color:var(--muted)} .faint{color:var(--faint)} .small{font-size:12px}

/* ---- forms ---- */
.form{display:flex;flex-direction:column;gap:16px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field>span{font-size:12.5px;font-weight:600;color:var(--ink)}
.mini-link{background:none;border:0;color:var(--accent);font:inherit;font-size:11px;font-weight:600;cursor:pointer;padding:0;margin-left:8px}
.mini-link:hover{text-decoration:underline}
.mini-link[hidden]{display:none}
.input{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;
  font:inherit;font-size:14px;background:#fff;color:var(--ink)}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.input.file{padding:8px 12px}
.check{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted)}
.actions{display:flex;align-items:center;gap:14px;margin-top:4px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:10px;
  padding:11px 18px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#4338ca}
.btn-block{width:100%}
.btn-ghost-danger{background:#fff;border:1px solid var(--danger-soft);color:var(--danger)}
.btn-ghost-danger:hover{background:var(--danger-soft)}
.btn:focus-visible,.input:focus-visible,.link-btn:focus-visible{outline:2px solid var(--accent);outline-offset:1px}

/* ---- banners / pills ---- */
.banner{padding:11px 15px;border-radius:11px;font-size:13.5px;margin-bottom:18px;border:1px solid transparent}
.banner.ok{background:var(--ok-soft);color:#166534;border-color:#bbf7d0}
.banner.err{background:var(--danger-soft);color:#991b1b;border-color:#fecaca}
.banner.warn{background:#fef3c7;color:#92400e;border-color:#fde68a}
.pill{display:inline-block;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:600}
.pill.ok{background:var(--ok-soft);color:#166534}
.pill.err{background:var(--danger-soft);color:#991b1b}
.pill.accent{background:var(--accent-soft);color:var(--accent)}
.pill.neutral{background:#eef0f4;color:#5b6478}

/* ---- status card ---- */
.status-card{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}

/* ---- table ---- */
.table{width:100%;border-collapse:collapse;font-size:13.5px}
.table th{text-align:left;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--faint);padding:14px 18px;border-bottom:1px solid var(--border)}
.table td{padding:14px 18px;border-bottom:1px solid var(--border-2);vertical-align:top}
.table tr:last-child td{border-bottom:0}
.table .nm{font-weight:600}
.table .empty{text-align:center;padding:34px}
.table .right{text-align:right}
.tag{display:inline-block;padding:1px 7px;border-radius:6px;background:var(--accent-soft);color:var(--accent);font-size:10px;font-weight:700;letter-spacing:.02em;vertical-align:middle}
.btn-mini{border:1px solid var(--border);background:#fff;color:var(--ink);font:inherit;font-size:12px;font-weight:600;
  padding:6px 12px;border-radius:8px;cursor:pointer;white-space:nowrap}
.btn-mini:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.btn-mini:focus-visible{outline:2px solid var(--accent);outline-offset:1px}

@media (max-width:720px){
  .app{grid-template-columns:1fr}
  .sidebar{flex-direction:row;align-items:center;gap:14px;padding:12px 16px}
  .nav{flex-direction:row}.side-sub,.side-foot{display:none}
  .content{padding:22px 18px}.grid-2{grid-template-columns:1fr}
}