:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--text-primary: #e8e8f0;--text-secondary: #a0a0c0;--accent-cyan: #00d4ff;--accent-purple: #a855f7;--accent-pink: #ec4899;--glow-cyan: rgba(0, 212, 255, .4);--glow-purple: rgba(168, 85, 247, .4);--radius: 12px;--radius-sm: 8px;--transition: .3s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg-primary);color:var(--text-primary)}.hidden{display:none!important}.auth-container{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;background:radial-gradient(ellipse at center,#1a1a2e,#0a0a0f 70%)}.auth-card{width:100%;max-width:420px;padding:40px;background:#12121af2;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);animation:fadeInUp .6s ease}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.auth-header{text-align:center;margin-bottom:32px}.auth-title{font-size:2rem;font-weight:800;margin-bottom:8px}.gradient-text{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple),var(--accent-pink));background-size:200% 200%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradient-shift 4s ease infinite}@keyframes gradient-shift{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.auth-subtitle{color:var(--text-secondary);font-size:.95rem}.auth-form{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.form-title{font-size:1.3rem;font-weight:700;margin-bottom:24px;text-align:center}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-size:.9rem;color:var(--text-secondary)}.form-group input{width:100%;padding:14px 16px;font-size:1rem;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-sm);background:#ffffff0d;color:var(--text-primary);outline:none;transition:var(--transition)}.form-group input:focus{border-color:var(--accent-cyan);box-shadow:0 0 12px var(--glow-cyan)}.form-group input::placeholder{color:#a0a0c080}.pwd-checks{margin-top:10px;display:flex;flex-direction:column;gap:4px;animation:fadeIn .25s ease}.pwd-check{font-size:.82rem;color:var(--text-secondary);transition:color var(--transition)}.pwd-check:before{display:inline-block;width:16px;margin-right:4px;text-align:center}.pwd-check.pass{color:#10b981}.pwd-check.pass:before{content:"✓"}.pwd-check.fail{color:#ef4444}.pwd-check.fail:before{content:"✗"}.pwd-match-hint{margin-top:6px;font-size:.82rem;animation:fadeIn .25s ease}.pwd-match-hint.match{color:#10b981}.pwd-match-hint.mismatch{color:#ef4444}.btn-submit{width:100%;padding:14px;font-size:1.05rem;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple));border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);margin-top:8px}.btn-submit:hover{transform:translateY(-2px);box-shadow:0 8px 24px var(--glow-purple)}.btn-submit:active{transform:translateY(0)}.btn-submit:disabled{opacity:.6;cursor:not-allowed;transform:none}.auth-switch{text-align:center;margin-top:20px;font-size:.9rem;color:var(--text-secondary)}.auth-switch a{color:var(--accent-cyan);text-decoration:none;font-weight:600}.auth-switch a:hover{text-decoration:underline}.auth-error{margin-top:16px;padding:12px 16px;background:#ef4444e6;color:#fff;border-radius:var(--radius-sm);font-size:.9rem;text-align:center;animation:shakeIn .4s ease}@keyframes shakeIn{0%{opacity:0;transform:translate(-10px)}50%{transform:translate(10px)}to{opacity:1;transform:translate(0)}}.auth-footer{margin-top:24px;text-align:center}.auth-footer a{color:var(--text-secondary);text-decoration:none;font-size:.9rem}.auth-footer a:hover{color:var(--accent-cyan)}@media (max-width: 480px){.auth-card{margin:16px;padding:24px}.auth-title{font-size:1.6rem}}