/* ST Training identity: corporate blue with a learning-focused turquoise accent. */
:root{--st-blue:#084888;--st-navy:#103154;--st-teal:#00aaa8}
.brand-image{display:block;width:100%;height:auto;object-fit:contain}
.sidebar-brand{display:block;background:#fff;border-radius:12px;padding:12px 9px;box-shadow:0 4px 18px #031c3515;white-space:normal}
.sidebar-brand .brand-image{width:100%;aspect-ratio:3/1}
aside{background:linear-gradient(165deg,#103458,#122d40)}
.side-caption{margin:14px 0 26px;text-align:center;color:#b5d4e4;letter-spacing:.3px}
nav a.selected{background:#ffffff12;border-left:3px solid #23c2bf;padding-left:10px}
.login-shell{position:relative;isolation:isolate;padding:40px 24px;background:radial-gradient(ellipse at 18% 12%,#d8eaf8 0,transparent 48%),radial-gradient(ellipse at 90% 85%,#d9f2ed 0,transparent 42%),#f2f6fa}
.login-shell::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(#08488804 1px,transparent 1px),linear-gradient(90deg,#08488804 1px,transparent 1px);background-size:46px 46px;pointer-events:none}
.login-card{position:relative;overflow:hidden;max-width:510px;padding:36px 44px 32px;border:1px solid #fff;border-radius:22px;box-shadow:0 22px 65px #10345813,0 2px 8px #10345805}
.login-card::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:linear-gradient(90deg,var(--st-blue) 0%,var(--st-blue) 65%,var(--st-teal) 65%,#57d6c9 100%)}
.login-brand{display:block;max-width:394px;margin:0 auto 24px;padding:0 0 22px;border-bottom:1px solid #e7eef4}
.login-brand .brand-image{aspect-ratio:3/1}
.login-role{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:1.25px;color:var(--st-blue);background:#eef5fc;padding:5px 10px;border-radius:6px;margin-bottom:10px}
.login-role::before{content:"";width:6px;height:6px;background:var(--st-teal);border-radius:50%}
.login-card h1{color:var(--st-navy);font-size:25px;line-height:1.5;margin:0 0 10px;letter-spacing:-.5px}
.login-card>p.muted{font-size:14px;margin-bottom:24px;line-height:1.8}
.login-card .field>span{font-size:13px;color:#324b65;font-weight:600}
.login-card .form-control{min-height:48px;background:#f9fbfd;border-color:#d9e3ed;border-radius:9px}
.login-card .form-control:focus{background:#fff;border-color:#2d7cb7;box-shadow:0 0 0 3px #2d7cb714}
.login-card .btn-primary{min-height:49px;background:var(--st-blue);border-color:var(--st-blue);font-weight:600;box-shadow:0 5px 12px #08488816}
.login-card .btn-primary:hover{background:#06386b;border-color:#06386b}
.login-card>.hint{font-size:12px;line-height:1.9;padding:13px 0 0;margin:8px 0 16px}
.login-card>a{font-size:13px;color:var(--st-blue);text-underline-offset:4px}
@media(max-width:750px){.sidebar-brand{width:208px;padding:8px 10px;border-radius:9px}.side-caption{display:none}}
@media(max-width:540px){.login-shell{padding:22px 16px}.login-card{padding:28px 24px 26px;border-radius:18px}.login-brand{margin-bottom:20px;padding-bottom:16px}.login-card h1{font-size:23px}.login-card>p.muted{font-size:13px}}