/* Trang đăng nhập / đăng ký: nửa trái banner xanh, nửa phải ô đăng nhập */
:root{--ink:#173C54;--muted:#58758A;--line:#D2E3F0;--ridge:#096699;--soft:#E3F1FB;--bg:#F4F8FC;--err:#B11C31;--ok:#176137}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:"Be Vietnam Pro",system-ui,"Segoe UI",sans-serif}
.auth{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-height:100vh}
.auth-art{position:relative;display:flex;flex-direction:column;padding:48px 64px 0;color:#fff;overflow:hidden;
  background:linear-gradient(160deg,#0B3554 0%,#0E5887 55%,#3C93C8 100%)}
.brand{display:flex;align-items:center;gap:14px;font-weight:700;font-size:1.35rem;line-height:1.15}
.brand-mark{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#2A9CD8,#59B9E8);display:grid;place-items:center;flex:none}
.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:#A2DAF9;margin:72px 0 18px}
.auth-art h1{font-size:clamp(2rem,4vw,3.4rem);line-height:1.15;margin:0 0 22px;font-weight:700}
.auth-art p{margin:0 0 8px;color:#D6E8F5;font-size:1.05rem}
.hands{margin-top:auto;width:100%;max-width:640px;display:block}
.art-foot{position:absolute;left:0;right:0;bottom:0;padding:14px;text-align:center;font-size:.9rem;background:#0B3554cc;color:#D6E8F5}
.auth-form{display:flex;align-items:center;justify-content:center;padding:48px 24px;background:linear-gradient(180deg,#fff,var(--bg))}
.panel{width:min(100%,460px)}
.panel .eyebrow{color:var(--ridge);margin:0 0 14px}
.panel h2{font-size:2rem;margin:0 0 10px;font-weight:600}
.panel .sub{color:var(--muted);margin:0 0 28px;line-height:1.6}
label{display:block;font-weight:500;margin:16px 0 8px;font-size:.95rem}
input{width:100%;font:inherit;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:#EEF4FB;color:var(--ink)}
input:focus{outline:3px solid #8CC8EA;outline-offset:1px;background:#fff}
.btn{display:block;width:100%;margin-top:22px;padding:15px 18px;border:0;border-radius:10px;font:inherit;font-weight:600;font-size:1.05rem;color:#fff;cursor:pointer;
  background:linear-gradient(90deg,#0B4F7C,#1384BC);text-align:left}
.btn:disabled{opacity:.6;cursor:default}
.links{display:flex;justify-content:space-between;gap:12px;margin-top:18px;font-size:.92rem}
.links a{color:var(--ridge);text-decoration:none;font-weight:500}
.msg{min-height:1.4em;margin-top:14px;font-size:.92rem}
.msg.err{color:var(--err)} .msg.ok{color:var(--ok)}
.hint{color:var(--muted);font-size:.85rem;margin-top:6px}
[hidden]{display:none!important}
.role-tag{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.08em;padding:4px 10px;border-radius:99px;background:#FFF0DD;color:#9A5A00;margin-bottom:12px}
@media(max-width:860px){.auth{grid-template-columns:minmax(0,1fr)}.auth-art{padding:28px 20px 0;min-height:auto}.eyebrow{margin-top:28px}.hands{max-width:420px;margin:12px auto 44px}}