*{box-sizing:border-box;}
html,body{height:100%;}
body.auth-page{
    margin:0;
    min-height:100%;
    font-family:var(--auth-font-family, Inter, system-ui, sans-serif);
    background:var(--auth-bg-color, #0f172a);
    color:var(--auth-page-text-color, #e5e7eb);
    background-image:var(--auth-background-image, none);
    background-size:cover;
    background-position:center;
    background-attachment:fixed;
}
body.auth-page::before{
    content:"";
    position:fixed;
    inset:0;
    background:radial-gradient(circle at 45% 25%, rgba(220,38,38,.22), rgba(2,6,23,.88) 48%, rgba(2,6,23,.95));
    z-index:0;
    pointer-events:none;
}
.auth-shell{
    position:relative;
    z-index:1;
    min-height:100vh;
    display:grid;
    grid-template-columns:250px 1fr;
}
.auth-left-nav{
    border-right:1px solid rgba(255,255,255,.13);
    background:linear-gradient(180deg,rgba(2,6,23,.9),rgba(2,6,23,.84));
    display:flex;
    flex-direction:column;
}
.auth-brand-block{
    padding:18px 16px;
    border-bottom:1px solid rgba(255,255,255,.1);
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:185px;
}
.auth-brand-logo{
    max-width:100%;
    max-height:140px;
    object-fit:contain;
}
.auth-nav-list{
    padding:10px 8px;
    display:grid;
    gap:4px;
}
.auth-nav-item{
    display:block;
    padding:12px 14px;
    border-radius:8px;
    text-decoration:none;
    color:#e5e7eb;
    font-size:16px;
    font-weight:700;
    letter-spacing:.6px;
    text-transform:uppercase;
    border:1px solid transparent;
}
.auth-nav-item.active{
    background:linear-gradient(90deg,var(--auth-accent-color, #d97706),rgba(2,6,23,.3));
    border-color:var(--auth-accent-color, #d97706);
}
.auth-nav-item:hover{
    border-color:rgba(255,255,255,.2);
    transform:translateX(2px);
}
.auth-nav-footer{
    margin-top:auto;
    padding:12px 14px;
    border-top:1px solid rgba(255,255,255,.1);
    font-size:11px;
    opacity:.82;
    letter-spacing:.3px;
}
.auth-panel{
    padding:26px;
    max-width:820px;
    width:100%;
}
.auth-panel h2{
    margin:0;
    font-size:44px;
    line-height:1;
    font-weight:900;
    text-transform:uppercase;
    letter-spacing:.8px;
}
.auth-panel-subtitle{
    margin:8px 0 16px;
    font-size:13px;
    letter-spacing:.7px;
    text-transform:uppercase;
    opacity:.86;
    color:var(--auth-accent-color, #d97706);
}
.auth-form{
    border:1px solid rgba(255,255,255,.22);
    border-radius:10px;
    padding:14px;
    background:var(--auth-card-bg-color, #ffffff);
    color:var(--auth-card-text-color, #111827);
    box-shadow:0 14px 24px rgba(2,6,23,.34);
}
.auth-form label{
    display:block;
    font-size:12px;
    letter-spacing:.5px;
    text-transform:uppercase;
    margin-bottom:10px;
}
.auth-form input{
    display:block;
    width:100%;
    padding:9px;
    margin-top:6px;
    border-radius:6px;
    border:1px solid #334155;
    background:#0b1220;
    color:#e5e7eb;
}
.auth-form button{
    padding:10px 14px;
    border-radius:8px;
    border:0;
    background:var(--auth-accent-color, #d97706);
    color:#fff;
    cursor:pointer;
    text-transform:uppercase;
    letter-spacing:.5px;
    font-weight:700;
}
.auth-error{
    color:#ef4444;
    margin-top:0;
    margin-bottom:10px;
}
@media (max-width:940px){
    .auth-shell{grid-template-columns:1fr;}
    .auth-left-nav{display:none;}
    .auth-panel{padding:16px;}
}