:root{--auth-primary: #667eea;--auth-secondary: #764ba2;--auth-accent: #4facfe;--auth-success: #10b981;--auth-error: #ef4444;--auth-warning: #f59e0b;--auth-bg-light: #f8fafc;--auth-bg-dark: #1a202c;--auth-card-bg: rgba(255, 255, 255, .95);--auth-glass-bg: rgba(255, 255, 255, .1);--auth-glass-border: rgba(255, 255, 255, .2);--auth-text-primary: #1a202c;--auth-text-secondary: #4a5568;--auth-text-muted: #718096;--auth-border: #e2e8f0;--auth-shadow: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--auth-shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, .25)}@media (prefers-color-scheme: dark){:root{--auth-card-bg: rgba(26, 32, 44, .95);--auth-text-primary: #f7fafc;--auth-text-secondary: #e2e8f0;--auth-text-muted: #a0aec0;--auth-border: #2d3748;--auth-glass-bg: rgba(0, 0, 0, .2);--auth-glass-border: rgba(255, 255, 255, .1)}}.auth-container{min-height:100vh;display:flex;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,var(--auth-primary) 0%,var(--auth-secondary) 100%);background-size:400% 400%;animation:gradientShift 8s ease infinite;position:relative;overflow:hidden}.auth-container:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');opacity:.5}.auth-branding{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:3rem;color:#fff;position:relative;z-index:10}.auth-logo{width:80px;height:80px;background:var(--auth-glass-bg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:20px;display:flex;align-items:center;justify-content:center;margin-bottom:2rem;border:1px solid var(--auth-glass-border);box-shadow:var(--auth-shadow)}.auth-logo i{font-size:2rem;color:#fff}.auth-brand-title{font-size:2.5rem;font-weight:800;margin-bottom:1rem;text-align:center;text-shadow:0 2px 4px rgba(0,0,0,.1)}.auth-brand-subtitle{font-size:1.1rem;text-align:center;opacity:.9;max-width:400px;line-height:1.6}.auth-features{margin-top:3rem;display:flex;flex-direction:column;gap:1rem}.auth-feature{display:flex;align-items:center;gap:.75rem;font-size:.95rem;opacity:.9}.auth-feature i{color:var(--auth-accent);font-size:1.1rem}.auth-form-container{flex:1;display:flex;align-items:center;justify-content:center;padding:2rem;position:relative;z-index:10}.auth-form-card{background:var(--auth-card-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;padding:3rem;width:100%;max-width:450px;box-shadow:var(--auth-shadow-lg);border:1px solid var(--auth-glass-border)}.auth-form-header{text-align:center;margin-bottom:2.5rem}.auth-form-title{font-size:1.8rem;font-weight:700;color:var(--auth-text-primary);margin-bottom:.5rem}.auth-form-subtitle{color:var(--auth-text-secondary);font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:3rem}.auth-form-group{position:relative;height:5rem;display:flex;flex-direction:column}.auth-form-label{display:block;font-size:.875rem;font-weight:600;color:var(--auth-text-primary);margin-bottom:.5rem}.auth-form-input{width:100%;padding:.875rem 1rem;border:2px solid var(--auth-border);border-radius:12px;font-size:1rem;background:#fff;color:var(--auth-text-primary);transition:all .3s cubic-bezier(.4,0,.2,1);outline:none;min-height:3.5rem;box-sizing:border-box;display:block}.auth-form-input:focus{border-color:var(--auth-primary);box-shadow:0 0 0 3px #667eea1a}.auth-form-input::placeholder{color:var(--auth-text-muted)}.auth-input-group{position:relative;display:flex;align-items:center;height:3.5rem;flex-shrink:0}.auth-input-icon{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--auth-text-muted);font-size:1.1rem;z-index:5;pointer-events:none;margin:0;padding:0}.auth-input-group .auth-form-input{padding-left:3rem;width:100%;min-height:3.5rem;box-sizing:border-box}.auth-error-container{position:absolute;top:calc(100% + .5rem);left:0;right:0;height:1.5rem;z-index:1000;pointer-events:none;overflow:visible}.auth-error-container .auth-error-message{pointer-events:auto;position:absolute;top:0;left:0;right:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.auth-password-toggle{position:absolute;right:1rem;top:50%;transform:translateY(-50%);background:none;border:none;color:var(--auth-text-muted);cursor:pointer;font-size:1.1rem;padding:.25rem;border-radius:4px;transition:color .2s ease;z-index:10;margin:0}.auth-password-toggle:hover{color:var(--auth-primary)}.auth-submit-btn{background:linear-gradient(135deg,var(--auth-primary) 0%,var(--auth-secondary) 100%);color:#fff;border:none;padding:1rem;border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.auth-submit-btn:hover{transform:translateY(-2px);box-shadow:var(--auth-shadow)}.auth-submit-btn:active{transform:translateY(0)}.auth-submit-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.auth-loading{display:inline-flex;align-items:center;gap:.5rem}.auth-spinner{width:1rem;height:1rem;border:2px solid rgba(255,255,255,.3);border-top:2px solid white;border-radius:50%;animation:spin 1s linear infinite}.auth-form-footer{margin-top:2rem;text-align:center}.auth-link{color:var(--auth-primary);text-decoration:none;font-weight:600;transition:color .2s ease}.auth-link:hover{color:var(--auth-secondary);text-decoration:underline}.auth-form-input.error{border-color:var(--auth-error);box-shadow:0 0 0 3px #ef44441a}.auth-error-message{color:var(--auth-error);font-size:.875rem;display:flex;align-items:center;gap:.5rem;line-height:1.25rem;animation:fadeIn .2s ease-in-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.auth-form-input.success{border-color:var(--auth-success);box-shadow:0 0 0 3px #10b9811a}.auth-success-message{color:var(--auth-success);font-size:.875rem;margin-top:.5rem;display:flex;align-items:center;gap:.5rem}.auth-checkbox-group{display:flex;align-items:center;gap:.75rem}.auth-checkbox{width:1.125rem;height:1.125rem;border:2px solid var(--auth-border);border-radius:4px;background:#fff;cursor:pointer;position:relative;transition:all .2s ease}.auth-checkbox:checked{background:var(--auth-primary);border-color:var(--auth-primary)}.auth-checkbox:checked:after{content:"✓";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:.75rem;font-weight:700}.auth-checkbox-label{font-size:.875rem;color:var(--auth-text-secondary);cursor:pointer}@media (max-width: 768px){.auth-container{flex-direction:column}.auth-branding{flex:none;padding:2rem 1rem;min-height:auto}.auth-brand-title{font-size:2rem}.auth-features{display:none}.auth-form-container{flex:1;padding:1rem}.auth-form-card{padding:2rem;border-radius:20px}}@media (max-width: 480px){.auth-form-card{padding:1.5rem;margin:0;border-radius:16px}.auth-brand-title{font-size:1.75rem}}