:root{--surface:#f2f4f8;--elevated:#fff;--ink:#121619;--ink2:#4d5358;--ink3:#697077;--hairline:#dde1e6;--accent:#0f62fe;--accent-ink:#f7faff;--radius:8px;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--surface);color:var(--ink);font-family:IBM Plex Sans,system-ui,sans-serif;font-size:15px}a{color:inherit}button,input,select,textarea{font:inherit;color:inherit}.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1rem;border-radius:var(--radius);border:1px solid var(--hairline);background:var(--elevated);cursor:pointer}.btn:hover{background:var(--surface)}.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.btn-primary:hover{opacity:.92;background:var(--accent)}.card{background:var(--elevated);border:1px solid var(--hairline);border-radius:var(--radius);padding:1.25rem}.field{display:flex;flex-direction:column;gap:.3rem;margin-bottom:1rem}.field label{font-size:.85rem;color:var(--ink2)}.field input,.field textarea{padding:.55rem .7rem;border-radius:var(--radius);border:1px solid var(--hairline);background:var(--elevated)}.error-msg{color:#b33a3a;font-size:.85rem}.shell{display:flex;min-height:100vh}.rail{width:260px;flex-shrink:0;border-right:1px solid var(--hairline);padding:1rem;display:flex;flex-direction:column;gap:1rem}.main{flex:1 1;min-width:0;padding:1.5rem}.container{max-width:880px;margin:0 auto}.rail-item{display:block;padding:.5rem .7rem;border-radius:var(--radius);text-decoration:none;color:var(--ink2);font-size:.9rem}.rail-item:hover{background:rgba(15,98,254,.06)}.rail-item.active{background:rgba(15,98,254,.12);color:var(--accent);font-weight:500}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.auth-card{width:100%;max-width:360px}.top-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.25rem}