:root{--font:"Poppins", sans-serif;--primary:#4338ca;--primary-600:#4f46e5;--primary-700:#3730a3;--primary-soft:#eef2ff;--surface:#fff;--bg:#f1f5f9;--border:#e2e8f0;--text:#0f172a;--text-muted:#64748b;--text-faint:#94a3b8;--radius:12px;--radius-sm:8px;--danger:#dc2626;--success:#16a34a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);min-height:100vh;display:flex;overflow:hidden}.auth-brand{color:#fff;background:linear-gradient(#1e1b4b 0%,#312e81 50%,#4338ca 100%);flex-direction:column;flex:1;justify-content:center;align-items:center;padding:40px;display:flex;position:relative}.auth-brand:after{content:"";background:var(--bg);z-index:2;width:80px;height:80px;position:absolute;top:50%;right:-40px;transform:translateY(-50%)rotate(45deg)}.brand-card{text-align:center;max-width:380px;animation:.7s fadeUp}.brand-icon{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffff1a;border:1px solid #ffffff1f;border-radius:20px;justify-content:center;align-items:center;width:88px;height:88px;margin:0 auto 24px;font-size:40px;display:flex}.brand-card h1{margin-bottom:8px;font-size:1.6rem;font-weight:800}.brand-card p{opacity:.75;font-size:.9rem;line-height:1.5}.auth-form-panel{background:var(--surface);z-index:3;justify-content:center;align-items:center;width:500px;display:flex;position:relative}.auth-form-card{width:100%;max-width:380px;padding:40px;animation:.5s .15s both fadeUp}.auth-form-card h2{color:var(--text);margin-bottom:4px;font-size:1.4rem;font-weight:700}.auth-form-card .subtitle{color:var(--text-muted);margin-bottom:28px;font-size:.82rem}.form-group{margin-bottom:18px}.form-group label{color:var(--text);margin-bottom:6px;font-size:.8rem;font-weight:600;display:block}.input-wrap{position:relative}.input-wrap .field-icon{color:var(--text-faint);pointer-events:none;font-size:.95rem;transition:color .2s;position:absolute;top:50%;left:14px;transform:translateY(-50%)}.input-wrap input{border:1.5px solid var(--border);border-radius:var(--radius-sm);width:100%;height:44px;font-size:.88rem;font-family:var(--font);color:var(--text);background:var(--surface);outline:none;padding:0 14px 0 42px;transition:border-color .2s,box-shadow .2s}.input-wrap input:focus{border-color:var(--primary-600);box-shadow:0 0 0 3px var(--primary-soft)}.input-wrap input:focus~.field-icon{color:var(--primary)}.auth-alert{border-radius:var(--radius-sm);align-items:center;gap:8px;margin-bottom:16px;padding:10px 14px;font-size:.8rem;display:none}.auth-alert.error{color:var(--danger);background:#fef2f2;border:1px solid #fecaca}.auth-alert.show{display:flex}.btn-submit{background:var(--primary);color:#fff;border-radius:var(--radius-sm);width:100%;height:44px;font-size:.9rem;font-weight:600;font-family:var(--font);cursor:pointer;border:none;justify-content:center;align-items:center;gap:8px;transition:background .15s,transform .15s,box-shadow .15s;display:flex;box-shadow:0 4px 10px #4338ca47}.btn-submit:hover{background:var(--primary-700);transform:translateY(-1px)}.btn-submit:active{transform:translateY(0)}.btn-submit:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-submit .spinner{border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:18px;height:18px;animation:.6s linear infinite spin;display:none}.btn-submit.loading .spinner{display:block}.btn-submit.loading .btn-label{display:none}.success-box{text-align:center;padding:24px 0;display:none}.success-box.show{animation:.4s fadeUp;display:block}.success-box .success-icon{width:64px;height:64px;color:var(--success);background:#dcfce7;border-radius:50%;justify-content:center;align-items:center;margin:0 auto 16px;font-size:28px;display:flex}.success-box h3{color:var(--text);margin-bottom:6px;font-size:1.05rem;font-weight:700}.success-box p{color:var(--text-muted);font-size:.82rem;line-height:1.6}.form-footer{text-align:center;color:var(--text-muted);margin-top:22px;font-size:.8rem}.form-footer a{color:var(--primary);font-weight:600;text-decoration:none}.form-footer a:hover{text-decoration:underline}@media (width<=900px){body{flex-direction:column;overflow:auto}.auth-brand{min-height:200px;padding:36px 20px 28px}.auth-brand:after{display:none}.auth-form-panel{z-index:3;border-radius:20px 20px 0 0;width:100%;margin-top:-20px;position:relative}}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}