:root{--auth-accent:#6c63ff;--auth-accent-hover:#5a52d5;--auth-accent-light:#ede9ff;--auth-bg:#f4f6fb;--auth-card-bg:#ffffff;--auth-text:#1a1d2e;--auth-muted:#6b7280;--auth-border:#e2e6f0;--auth-input-bg:#f9fafb;--auth-input-focus:#6c63ff;--auth-error:#ef4444;--auth-success:#10b981;--auth-warning:#f59e0b;--auth-radius:14px;--auth-radius-sm:8px;--auth-shadow:0 8px 40px rgba(108, 99, 255, 0.10);--auth-transition:0.2s ease}.auth-wrapper *,.auth-wrapper *::before,.auth-wrapper *::after{box-sizing:border-box;margin:0;padding:0}.auth-wrapper{min-height:100vh;background:var(--auth-bg);display:flex;align-items:center;justify-content:center;padding:2rem 1rem;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif}.auth-container{background:var(--auth-card-bg);border-radius:var(--auth-radius);box-shadow:var(--auth-shadow);padding:2.5rem 2.5rem 2rem;width:100%;max-width:480px;animation:auth-slide-in 0.35s ease}@keyframes auth-slide-in{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.auth-brand{text-align:center;margin-bottom:1.75rem}.auth-brand img{max-height:48px;width:auto}.auth-site-name{font-size:1.5rem;font-weight:700;color:var(--auth-text)}.auth-tabs{display:flex;position:relative;background:var(--auth-input-bg);border-radius:10px;padding:4px;margin-bottom:1.5rem;gap:4px}.auth-tab{flex:1;padding:.6rem;border:none;background:#fff0;border-radius:7px;font-size:.9rem;font-weight:500;color:var(--auth-muted);cursor:pointer;transition:color var(--auth-transition);position:relative;z-index:1}.auth-tab.active{color:var(--auth-text);background:var(--auth-card-bg);box-shadow:0 1px 6px rgb(0 0 0 / .08)}.auth-alert{display:flex;align-items:flex-start;gap:.6rem;padding:.85rem 1rem;border-radius:var(--auth-radius-sm);margin-bottom:1.25rem;font-size:.875rem;line-height:1.4;animation:auth-fade-in 0.2s ease}.auth-alert[hidden]{display:none}.auth-alert.is-error{background:#fef2f2;color:var(--auth-error);border:1px solid #fecaca}.auth-alert.is-success{background:#f0fdf4;color:var(--auth-success);border:1px solid #bbf7d0}@keyframes auth-fade-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.auth-form{display:flex;flex-direction:column;gap:1rem}.auth-row{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.auth-field{display:flex;flex-direction:column;gap:.4rem}.auth-field label{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;font-weight:500;color:var(--auth-text)}.auth-input-wrap{position:relative;display:flex;align-items:center}.auth-input-icon{position:absolute;left:.85rem;width:18px;height:18px;color:var(--auth-muted);pointer-events:none;flex-shrink:0}.auth-input-wrap input{width:100%;padding:.7rem 2.75rem .7rem 2.75rem;border:1.5px solid var(--auth-border);border-radius:var(--auth-radius-sm);background:var(--auth-input-bg);color:var(--auth-text);font-size:.9rem;transition:border-color var(--auth-transition),box-shadow var(--auth-transition);outline:none}.auth-input-wrap input::placeholder{color:#b0b8c9}.auth-input-wrap input:focus{border-color:var(--auth-input-focus);box-shadow:0 0 0 3px rgb(108 99 255 / .12);background:#fff}.auth-input-wrap input.is-invalid{border-color:var(--auth-error);box-shadow:0 0 0 3px rgb(239 68 68 / .1)}.auth-field-error{font-size:.78rem;color:var(--auth-error);min-height:1em}.auth-toggle-password{position:absolute;right:.75rem;background:none;border:none;cursor:pointer;color:var(--auth-muted);padding:4px;display:flex;align-items:center;transition:color var(--auth-transition)}.auth-toggle-password:hover{color:var(--auth-accent)}.auth-toggle-password svg{width:18px;height:18px}.auth-forgot-link{font-size:.78rem;color:var(--auth-accent);background:none;border:none;cursor:pointer;padding:0;font-weight:500;text-decoration:none;transition:color var(--auth-transition)}.auth-forgot-link:hover{color:var(--auth-accent-hover);text-decoration:underline}.auth-checkbox{display:flex;align-items:center;gap:.6rem;cursor:pointer;font-size:.85rem;color:var(--auth-muted);user-select:none}.auth-checkbox input[type="checkbox"]{display:none}.auth-checkbox-custom{width:18px;height:18px;border:2px solid var(--auth-border);border-radius:4px;background:var(--auth-input-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--auth-transition)}.auth-checkbox input:checked+.auth-checkbox-custom{background:var(--auth-accent);border-color:var(--auth-accent)}.auth-checkbox input:checked+.auth-checkbox-custom::after{content:'';display:block;width:10px;height:5px;border-left:2px solid #fff;border-bottom:2px solid #fff;transform:rotate(-45deg) translateY(-1px)}.auth-checkbox a{color:var(--auth-accent);text-decoration:none}.auth-password-strength{display:flex;align-items:center;gap:.6rem;margin-top:.25rem}.auth-strength-bar{display:flex;gap:4px;flex:1}.auth-strength-bar span{flex:1;height:4px;border-radius:99px;background:var(--auth-border);transition:background 0.3s ease}.auth-strength-label{font-size:.75rem;color:var(--auth-muted);white-space:nowrap}.auth-btn{width:100%;padding:.85rem;background:var(--auth-accent);color:#fff;border:none;border-radius:var(--auth-radius-sm);font-size:.95rem;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.5rem;transition:background var(--auth-transition),transform var(--auth-transition),box-shadow var(--auth-transition);margin-top:.25rem}.auth-btn:hover:not(:disabled){background:var(--auth-accent-hover);box-shadow:0 4px 20px rgb(108 99 255 / .3);transform:translateY(-1px)}.auth-btn:active:not(:disabled){transform:translateY(0)}.auth-btn:disabled{opacity:.65;cursor:not-allowed}.auth-btn-spinner svg{width:18px;height:18px;animation:auth-spin 0.8s linear infinite}@keyframes auth-spin{to{transform:rotate(360deg)}}.auth-back-header{margin-bottom:.5rem}.auth-back-btn{display:flex;align-items:center;gap:.4rem;font-size:.82rem;color:var(--auth-muted);background:none;border:none;cursor:pointer;padding:0;margin-bottom:.75rem;transition:color var(--auth-transition)}.auth-back-btn:hover{color:var(--auth-accent)}.auth-back-btn svg{width:14px;height:14px}.auth-back-header h2{font-size:1.1rem;font-weight:600;color:var(--auth-text);margin-bottom:.25rem}.auth-back-header p{font-size:.85rem;color:var(--auth-muted)}@media (max-width:500px){.auth-container{padding:2rem 1.25rem 1.5rem}.auth-row{grid-template-columns:1fr}}