:root{
  --bg:#0b1020; --bg2:#0e1526;
  --card:#141d33; --card2:#182242;
  --border:#26324f; --border2:#314063;
  --text:#e8ecf5; --muted:#8f9bb3; --muted2:#6b7690;
  --primary:#ef9344; --primary2:#ef4444;
  --success:#22c55e; --success-d:#15803d;
  --danger:#ef4444;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);
  background:radial-gradient(1200px 600px at 50% -10%,#1b2547 0%,var(--bg) 55%) fixed, var(--bg);
  min-height:100vh; line-height:1.5;
}
.wrap{max-width:1080px;margin:0 auto;padding:32px 20px 48px}

/* Hero */
.hero{text-align:center;margin-bottom:28px}
.avatar{
  width:96px;height:96px;margin:0 auto 14px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:radial-gradient(circle at 35% 30%,#2b3a63,#141d33);
  border:3px solid var(--primary);
  box-shadow:0 0 28px rgba(239,147,68,.45);
}
.logo{
  font-size:2.6rem;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(90deg,var(--primary2),#f0a35e);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.tagline{color:var(--muted);margin-top:6px;font-size:1.05rem}

/* Cards */
.card{
  background:linear-gradient(180deg,var(--card2),var(--card));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;box-shadow:0 8px 28px rgba(0,0,0,.35);
}
.create-card{margin-bottom:26px}
.create-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.create-row input[type=text]{flex:2;min-width:200px}
.create-row select{flex:1;min-width:150px}
input:not([type]),input[type=text],input[type=password],input[type=url],select,textarea{
  background:#0e1526;border:1px solid var(--border2);color:var(--text);
  border-radius:10px;padding:12px 14px;font-size:.95rem;outline:none;width:100%;
}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(239,147,68,.18)}
input::placeholder{color:var(--muted2)}
input[readonly]{cursor:default}
select option{background:#141d33}

/* Buttons */
.btn{
  border:none;border-radius:10px;padding:12px 20px;font-size:.95rem;font-weight:700;
  cursor:pointer;color:#fff;transition:transform .08s,filter .15s;white-space:nowrap;
}
.btn:active{transform:scale(.97)}
.btn.primary{background:linear-gradient(135deg,#ef9344,#ef4444)}
.btn.primary:hover{filter:brightness(1.1)}
.btn.success{background:linear-gradient(135deg,#16a34a,#15803d)}
.btn.success:hover{filter:brightness(1.1)}
.btn.ghost{background:#222d49;border:1px solid var(--border2);color:var(--text)}
.btn.ghost:hover{background:#2a3757}
.btn.danger{background:linear-gradient(135deg,#ef4444,#b91c1c)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{
  background:#222d49;border:1px solid var(--border2);color:var(--text);
  border-radius:10px;width:40px;height:40px;font-size:1.1rem;cursor:pointer;
}
.icon-btn:hover{background:#2a3757}
.icon-btn.danger:hover{background:#7f1d1d}

.address-row{display:flex;gap:12px;flex-wrap:wrap}
.address-row input{flex:1;min-width:200px;font-family:ui-monospace,monospace}
.note{color:var(--muted);font-size:.85rem;margin-top:10px;min-height:1.2em}

/* Mailbox columns */
.cols{display:grid;grid-template-columns:1fr 1.4fr;gap:22px}
@media(max-width:820px){.cols{grid-template-columns:1fr}}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.card-head h2{font-size:1.15rem}
.head-btns{display:flex;gap:8px}
.pill{
  background:#222d49;border:1px solid var(--border2);border-radius:999px;
  font-size:.75rem;padding:3px 12px;color:var(--muted);font-weight:600;
}
.expiry{color:var(--muted);font-size:.82rem;margin-bottom:12px}
#messages{display:flex;flex-direction:column;gap:10px;max-height:480px;overflow:auto}
.msg{
  text-align:left;background:#0e1526;border:1px solid var(--border);border-radius:12px;
  padding:12px 14px;cursor:pointer;color:var(--text);display:flex;flex-direction:column;gap:4px;
  font:inherit;width:100%;
}
.msg:hover{border-color:var(--primary)}
.msg b{font-size:.95rem}
.msg span{color:var(--muted);font-size:.82rem;word-break:break-all}
.msg small{color:var(--muted2);font-size:.75rem}
.empty{color:var(--muted2);text-align:center;padding:36px 10px}
.empty-center{color:var(--muted2);text-align:center;padding:70px 20px}
.big-icon{font-size:2.6rem;margin-bottom:10px}
.viewer h3{margin-bottom:6px;word-break:break-word}
.meta{color:var(--muted);font-size:.85rem;margin-bottom:14px}
.otp{
  display:inline-block;background:linear-gradient(135deg,#ef9344,#ef4444);
  font-size:1.6rem;font-weight:800;letter-spacing:6px;border-radius:12px;
  padding:10px 22px;margin:6px 0 14px;color:#fff;
}
.bodytext{
  white-space:pre-wrap;word-break:break-word;background:#0e1526;
  border:1px solid var(--border);border-radius:12px;padding:16px;font-size:.92rem;
}
.bodytext a{color:#7cc4ff;word-break:break-all}
.bodytabs{display:flex;gap:8px;margin:4px 0 10px}
.tabbtn{
  background:#0e1526;border:1px solid var(--border);color:var(--muted);
  border-radius:8px;padding:6px 14px;font-size:.85rem;cursor:pointer;
}
.tabbtn.active{background:linear-gradient(135deg,#ef9344,#ef4444);color:#fff;border-color:transparent;font-weight:700}
.htmlframe{
  width:100%;height:520px;border:1px solid var(--border);border-radius:12px;background:#fff;
}

/* Banners */
.banners{margin-top:30px}
.banners h2{margin-bottom:14px;font-size:1.25rem}
.banner-grid{display:grid;grid-template-columns:1fr;gap:16px}
.banner{
  display:block;background:linear-gradient(180deg,var(--card2),var(--card));
  border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;
  text-decoration:none;color:var(--text);transition:transform .12s,border-color .15s;
}
.banner:hover{transform:translateY(-3px);border-color:var(--primary)}
.banner img{width:100%;height:auto;object-fit:cover;display:block;background:#0e1526}
.banner .b-body{padding:14px 16px}
.banner .b-body h3{font-size:1rem;margin-bottom:6px}
.banner .b-body p{color:var(--muted);font-size:.85rem}

/* Footer / toast */
footer{text-align:center;color:var(--muted2);font-size:.82rem;margin-top:36px}
footer a{color:var(--primary2);text-decoration:none;font-weight:600}
footer a:hover{text-decoration:underline}
#toast{
  position:fixed;left:50%;bottom:26px;transform:translateX(-50%);
  background:#1f2a45;border:1px solid var(--border2);color:var(--text);
  padding:12px 22px;border-radius:12px;display:none;z-index:50;
  box-shadow:0 8px 24px rgba(0,0,0,.5);max-width:90vw;
}

/* Admin */
.admin-wrap{max-width:900px;margin:0 auto;padding:40px 20px}
.admin-card h1{font-size:1.5rem;margin-bottom:4px}
.admin-card .sub{color:var(--muted);margin-bottom:18px;font-size:.9rem}
.field{margin-bottom:14px}
.field label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px;font-weight:600}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:600px){.row2{grid-template-columns:1fr}}
.check{display:flex;align-items:center;gap:8px;font-size:.9rem}
.check input{width:auto}
.table{width:100%;border-collapse:collapse;margin-top:8px;font-size:.88rem}
.table th,.table td{text-align:left;padding:10px;border-bottom:1px solid var(--border);vertical-align:top}
.table th{color:var(--muted);font-size:.78rem;text-transform:uppercase}
.badge{font-size:.72rem;padding:2px 10px;border-radius:999px;background:#222d49;border:1px solid var(--border2);white-space:nowrap}
.badge.on{background:#14532d;border-color:var(--success-d);color:#bbf7d0}
.mini-btn{background:#222d49;border:1px solid var(--border2);color:var(--text);border-radius:8px;padding:6px 12px;font-size:.8rem;cursor:pointer;margin:2px 6px 2px 0}
.mini-btn:hover{background:#2a3757}
.mini-btn.del:hover{background:#7f1d1d}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;gap:12px;flex-wrap:wrap}
.topbar h1{font-size:1.3rem}
.td-title{max-width:220px;overflow:hidden;text-overflow:ellipsis}
.form-title{margin:18px 0 12px;font-size:1.05rem}

/* Tabs */
.tabs{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}
.tab-btn{
  background:#141d33;border:1px solid var(--border2);color:var(--muted);
  border-radius:12px;padding:12px 22px;font-size:.95rem;font-weight:700;cursor:pointer;
}
.tab-btn:hover{color:var(--text)}
.tab-btn.active{background:linear-gradient(135deg,#ef9344,#ef4444);color:#fff;border:none}
.tab-pane[hidden]{display:none}

/* Bulk mail list */
.bulk-item{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:#0e1526;border:1px solid var(--border);border-radius:10px;
  padding:10px 14px;margin-bottom:8px;font-family:ui-monospace,monospace;font-size:.88rem;
}
.bulk-actions{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.hint{color:var(--muted2);font-size:.82rem;margin-top:8px}

/* Polling status + loading spinner */
.poll-state{font-size:.75rem;color:var(--muted2);align-self:center;white-space:nowrap}
.poll-state.paused{color:#f0a35e;font-weight:700}
.loading{text-align:center;padding:44px 10px;color:var(--muted)}
.loading p{margin-top:12px;font-size:.88rem}
.spinner{
  width:40px;height:40px;margin:0 auto;border-radius:50%;
  border:3px solid var(--border2);border-top-color:var(--primary);
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* Bulk item clickable to copy */
.bulk-item.clickable{cursor:pointer;transition:border-color .15s}
.bulk-item.clickable:hover{border-color:var(--primary)}

/* Selected message highlight */
.msg.active{border-color:var(--primary);background:#1d2947}

/* Restore existing mailbox */
.divider{display:flex;align-items:center;gap:12px;margin:16px 0 12px;color:var(--muted2);font-size:.8rem}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--border)}
.restore-row{display:flex;gap:10px}
.restore-row input{flex:1}
@media(max-width:640px){.restore-row{flex-direction:column}}

/* Dongnaminfotech branding */
.brand-logo{max-width:230px;height:auto;margin:0 auto 14px;display:block;border-radius:12px;background:#fff;padding:6px}
.services{margin-bottom:26px}
.services h2{margin-bottom:14px;font-size:1.15rem}
.service-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.service{background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:10px;padding:14px 10px;text-align:center;font-size:.8rem;font-weight:700;line-height:1.4}
.service .s-icon{font-size:1.6rem;display:block;margin-bottom:8px}
.company-footer{text-align:center;color:var(--muted);font-size:.85rem;margin-top:36px;line-height:1.7}
.company-footer strong{color:var(--text);font-size:.95rem}
.company-footer a{color:var(--primary2);text-decoration:none;font-weight:600}
.company-footer a:hover{text-decoration:underline}

/* Login card (public mailbox creation disabled) */
.login-card{margin-bottom:26px;text-align:center}
.login-card h2{margin-bottom:8px;font-size:1.25rem}
.login-card .note{margin-bottom:16px}
.login-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn.big{padding:14px 34px;font-size:1.05rem;text-decoration:none;display:inline-block}
a.service{text-decoration:none;color:var(--text);display:block;transition:transform .12s,border-color .15s}
a.service:hover{transform:translateY(-3px);border-color:var(--primary)}