:root{
	--navy-950:#f8fafc; --navy-900:#ffffff; --navy-800:#f1f5f9; --navy-700:#e6e9f0;
	--line:#e6e9f0; --line-soft:#f1f5f9;
	--ink-0:#12141c; --ink-1:#5c6579; --ink-2:#94a3b8;
	--indigo-500:#6366f1; --indigo-600:#4f46e5; --indigo-400:#4f46e5;
	--amber-500:#f59e0b;
	--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
html,body.dash-login-body{height:100%;}
body.dash-login-body{
	margin:0;background:var(--navy-950);color:var(--ink-0);font-family:'Inter',-apple-system,'Segoe UI',sans-serif;font-size:.875rem;
	background-image:radial-gradient(circle at 15% 10%, rgba(99,102,241,.07), transparent 45%),
	                  radial-gradient(circle at 85% 90%, rgba(99,102,241,.05), transparent 45%);
	min-height:100vh;display:flex;flex-direction:column;
}
.dash-login-body input,.dash-login-body button{font-family:'Inter',-apple-system,'Segoe UI',sans-serif;}
.dash-login-body ::-webkit-scrollbar{width:8px;}
.dash-login-body ::-webkit-scrollbar-thumb{background:#dbe0ea;border-radius:8px;}

@keyframes dashLoginFadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}
@keyframes dashLoginBadgePulse{0%,100%{box-shadow:0 10px 26px -10px rgba(79,70,229,.6),0 0 0 0 rgba(99,102,241,.35);}50%{box-shadow:0 10px 26px -10px rgba(79,70,229,.6),0 0 0 8px rgba(99,102,241,0);}}

/* ===== top bar ===== */
.admin-topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 26px;}
.admin-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1rem;color:var(--ink-0);}
.admin-brand .ic{width:30px;height:30px;border-radius:.55rem;background:var(--navy-800);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--indigo-400);flex-shrink:0;}
.admin-brand .brand-logo-img{max-height:30px;max-width:150px;object-fit:contain;}
.env-badge{
	font-family:var(--mono);font-size:.68rem;font-weight:600;letter-spacing:.04em;
	background:var(--navy-800);border:1px solid var(--line);color:var(--ink-1);
	padding:.3rem .6rem;border-radius:.4rem;
}

.lang-select{position:relative;}
.lang-btn{
	display:flex;align-items:center;gap:7px;border:1px solid var(--line);background:var(--navy-800);
	border-radius:.55rem;padding:.4rem .7rem;font-size:.76rem;font-weight:600;color:var(--ink-1);
	transition:background .15s,border-color .15s;
}
.lang-btn:hover{background:var(--navy-700);}
.lang-menu{
	position:absolute;top:calc(100% + 6px);right:0;background:var(--navy-800);border:1px solid var(--line);
	border-radius:.6rem;box-shadow:0 20px 45px -14px rgba(15,23,42,.18);min-width:160px;padding:5px;display:none;z-index:50;
}
.lang-menu.show{display:block;}
.lang-item-form{margin:0;}
.lang-item{
	display:flex;align-items:center;gap:9px;width:100%;padding:.45rem .55rem;border-radius:.45rem;
	font-size:.8rem;color:var(--ink-1);border:none;background:none;text-align:left;transition:background .15s;
}
.lang-item:hover{background:var(--navy-700);color:var(--ink-0);}
.lang-item.active{background:rgba(99,102,241,.15);color:var(--indigo-400);font-weight:600;}
.lang-flag{width:18px;text-align:center;}

/* ===== center ===== */
.center-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:20px;}
.admin-card{
	width:400px;max-width:100%;background:var(--navy-900);border:1px solid var(--line);border-radius:1.1rem;
	padding:32px 30px;box-shadow:0 20px 50px -20px rgba(15,23,42,.18);
	position:relative;overflow:hidden;animation:dashLoginFadeUp .45s ease both;
}
/* Vạch gradient mảnh đầu thẻ — dấu ấn thương hiệu tinh tế, khác hẳn giao
   diện đăng nhập webmail (2 cột) nên cần 1 chi tiết riêng cho khu vực
   quản trị, không sao chép y hệt. */
.admin-card::before{
	content:"";position:absolute;top:0;left:0;right:0;height:3px;
	background:linear-gradient(90deg,var(--indigo-500),var(--indigo-700));
}
.admin-icon-badge{
	width:52px;height:52px;border-radius:.9rem;background:linear-gradient(135deg,#4f46e5,#6366f1);
	display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:#fff;margin:0 auto 18px;
	box-shadow:0 10px 26px -10px rgba(79,70,229,.6);animation:dashLoginBadgePulse 2.6s ease-in-out infinite;
}
.admin-card h2{text-align:center;font-weight:800;font-size:1.25rem;color:var(--ink-0);margin-bottom:4px;letter-spacing:-.01em;}
.admin-card .sub{text-align:center;font-size:.78rem;color:var(--ink-2);margin-bottom:24px;}

.warn-box{
	display:flex;gap:10px;background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.25);
	border-radius:.7rem;padding:10px 12px;margin-bottom:22px;
}
.warn-box i{color:var(--amber-500);flex-shrink:0;margin-top:1px;}
.warn-box p{margin:0;font-size:.72rem;color:#92400e;line-height:1.5;}

.login-error{
	display:flex;gap:10px;background:#fef2f2;border:1px solid #fecaca;
	border-radius:.7rem;padding:10px 12px;margin-bottom:20px;font-size:.78rem;color:#991b1b;
}

.field-group{margin-bottom:15px;}
.field-group label{font-size:.76rem;font-weight:600;color:var(--ink-1);margin-bottom:6px;display:block;}
.input-icon{position:relative;}
.input-icon i.leading{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--ink-2);pointer-events:none;transition:color .15s;}
.input-icon input.form-control{
	width:100%;background:var(--navy-800);border:1px solid var(--line);color:var(--ink-0);border-radius:.65rem;
	padding:.62rem .9rem .62rem 2.35rem;font-size:.85rem;outline:none;transition:border-color .15s,box-shadow .15s;box-shadow:none;
}
.input-icon input.form-control::placeholder{color:var(--ink-2);}
.input-icon input.form-control:focus{border-color:var(--indigo-500);box-shadow:0 0 0 3px rgba(99,102,241,.18);background:var(--navy-800);color:var(--ink-0);}
.toggle-pass{position:absolute;right:12px;top:50%;transform:translateY(-50%);border:none;background:none;color:var(--ink-2);padding:0;transition:color .15s;}
.toggle-pass:hover{color:var(--ink-1);}

.row-between{display:flex;align-items:center;justify-content:space-between;margin:18px 0 20px;}
.remember-check{display:flex;align-items:center;gap:8px;font-size:.78rem;color:var(--ink-1);margin:0;}
.remember-check input{accent-color:var(--indigo-600);width:14px;height:14px;margin:0;}

.btn-login{
	width:100%;background:var(--indigo-600);border:none;color:#fff;border-radius:.65rem;padding:.72rem;
	font-weight:700;font-size:.87rem;box-shadow:0 10px 24px -10px rgba(79,70,229,.55);
	transition:background .15s,box-shadow .15s,transform .1s;
}
.btn-login:hover{background:#4338ca;color:#fff;box-shadow:0 14px 30px -10px rgba(67,56,202,.6);transform:translateY(-1px);}
.btn-login:active{transform:translateY(1px);}
.btn-login:disabled{opacity:.75;transform:none;}

.session-info{
	margin-top:22px;padding-top:16px;border-top:1px solid var(--line-soft);
	display:flex;justify-content:space-between;font-size:.68rem;color:var(--ink-2);font-family:var(--mono);gap:10px;
}
.session-info span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

.back-link{text-align:center;margin-top:18px;}
.back-link a{font-size:.78rem;color:var(--ink-2);text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:color .15s;}
.back-link a:hover{color:var(--ink-1);}

.admin-footer{text-align:center;padding:16px;font-size:.7rem;color:var(--ink-2);font-family:var(--mono);}

@media (max-width:480px){
	.admin-topbar{padding:14px 16px;}
	.admin-card{padding:26px 20px;}
}

@media (prefers-reduced-motion:reduce){
	.admin-card,.admin-icon-badge{animation:none;}
}