:root{--color-primary: #6366f1;--color-primary-hover: #4f46e5;--color-primary-light: #eef2ff;--color-primary-ring: rgba(99, 102, 241, .25);--color-success: #10b981;--color-success-light: #ecfdf5;--color-danger: #ef4444;--color-danger-light: #fef2f2;--color-white: #ffffff;--color-gray-50: #f9fafb;--color-gray-100: #f3f4f6;--color-gray-200: #e5e7eb;--color-gray-300: #d1d5db;--color-gray-400: #9ca3af;--color-gray-500: #6b7280;--color-gray-600: #4b5563;--color-gray-700: #374151;--color-gray-800: #1f2937;--color-gray-900: #111827;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .04), 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 8px rgba(0, 0, 0, .04), 0 2px 4px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .06), 0 4px 8px rgba(0, 0, 0, .04);--shadow-xl: 0 16px 32px rgba(0, 0, 0, .08), 0 8px 16px rgba(0, 0, 0, .04);--radius-md: .5rem;--radius-lg: .625rem;--radius-xl: .75rem;--radius-2xl: 1rem;--transition-fast: .15s cubic-bezier(.45, 0, .55, 1);--transition-normal: .2s cubic-bezier(.45, 0, .55, 1);--ease-out: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1)}@media (prefers-color-scheme: dark){:root{--color-primary: #818cf8;--color-primary-hover: #a5b4fc;--color-primary-light: rgba(129, 140, 248, .1);--color-primary-ring: rgba(129, 140, 248, .3);--color-success: #34d399;--color-success-light: rgba(52, 211, 153, .08);--color-danger: #f87171;--color-danger-light: rgba(248, 113, 113, .08);--color-white: #111827;--color-gray-50: #1a2233;--color-gray-100: #1f2937;--color-gray-200: #374151;--color-gray-300: #4b5563;--color-gray-400: #6b7280;--color-gray-500: #9ca3af;--color-gray-600: #d1d5db;--color-gray-700: #e5e7eb;--color-gray-800: #f3f4f6;--color-gray-900: #f9fafb;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .25);--shadow-md: 0 4px 8px rgba(0, 0, 0, .3);--shadow-lg: 0 8px 16px rgba(0, 0, 0, .35);--shadow-xl: 0 16px 32px rgba(0, 0, 0, .4)}.alert-error{border-color:#f8717133}.alert-success{color:var(--color-success);border-color:#34d39933}}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background-color:var(--color-gray-100);padding:24px;font-family:var(--font-family);font-size:.875rem;line-height:1.6;color:var(--color-gray-800);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.auth-wrapper{width:100%;max-width:400px;animation:fadeInUp .5s var(--ease-out)}.auth-brand{text-align:center;margin-bottom:32px}.brand-logo{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;background-color:var(--color-primary);border-radius:var(--radius-xl);margin-bottom:16px;box-shadow:0 4px 12px #4f46e54d;animation:fadeInScale .5s var(--ease-spring) .1s backwards}.brand-logo svg{width:26px;height:26px;stroke:#fff}.brand-name{font-size:1.375rem;font-weight:700;color:var(--color-gray-900);margin-bottom:4px;letter-spacing:-.025em}.brand-tagline{font-size:.8125rem;color:var(--color-gray-500)}.auth-card{background:var(--color-white);border-radius:var(--radius-2xl);box-shadow:var(--shadow-xl);overflow:hidden;border:1px solid var(--color-gray-200)}.auth-tabs{display:flex;border-bottom:1px solid var(--color-gray-200)}.auth-tab{flex:1;padding:14px 24px;text-align:center;cursor:pointer;background:transparent;border:none;font-family:inherit;font-size:.875rem;font-weight:500;color:var(--color-gray-500);transition:all var(--transition-fast);position:relative}.auth-tab:hover{color:var(--color-gray-700);background-color:var(--color-gray-50)}.auth-tab.active{color:var(--color-primary);font-weight:600}.auth-tab.active:after{content:"";position:absolute;bottom:-1px;left:20%;right:20%;height:2px;background-color:var(--color-primary);border-radius:2px 2px 0 0}.auth-body{padding:28px}.auth-form{display:none}.auth-form.active{display:block;animation:fadeInUp .3s var(--ease-out)}.login-page .form-group{margin-bottom:18px}.login-page .form-group label{display:block;margin-bottom:6px;font-size:.8125rem;font-weight:500;color:var(--color-gray-700)}.login-page .input-wrapper{position:relative}.login-page .input-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--color-gray-400);pointer-events:none;opacity:.8}.login-page .form-group input{width:100%;padding:10px 14px 10px 40px;border:1px solid var(--color-gray-200);border-radius:var(--radius-md);font-family:inherit;font-size:.875rem;color:var(--color-gray-800);background-color:var(--color-white);height:42px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.login-page .form-group input::placeholder{color:var(--color-gray-400)}.login-page .form-group input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-ring)}.login-page .btn{width:100%;padding:10px 24px;background-color:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-md);font-family:inherit;font-size:.875rem;font-weight:600;cursor:pointer;height:42px;transition:background-color var(--transition-fast),transform .1s ease;display:flex;align-items:center;justify-content:center;gap:8px}.login-page .btn:hover:not(:disabled){background-color:var(--color-primary-hover)}.login-page .btn:active:not(:disabled){transform:scale(.97)}.login-page .btn:disabled{opacity:.5;cursor:not-allowed}.login-page .btn svg{width:16px;height:16px}.login-page .alert{padding:10px 14px;border-radius:var(--radius-md);margin-bottom:18px;font-size:.8125rem;display:none;align-items:center;gap:8px;animation:fadeInUp .3s var(--ease-out)}.login-page .alert svg{width:16px;height:16px;flex-shrink:0}.login-page .alert-error{background-color:var(--color-danger-light);color:var(--color-danger);border:1px solid rgba(220,38,38,.15)}.login-page .alert-success{background-color:var(--color-success-light);color:var(--color-success);border:1px solid rgba(5,150,105,.15)}.loading-overlay{display:none;position:absolute;top:0;right:0;bottom:0;left:0;background:#ffffffd9;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);align-items:center;justify-content:center;flex-direction:column;gap:12px;border-radius:var(--radius-2xl);z-index:10}.loading-overlay.active{display:flex;animation:fadeIn .2s ease-out}.spinner{width:28px;height:28px;border:2.5px solid var(--color-gray-200);border-top-color:var(--color-primary);border-radius:50%;animation:spin .7s linear infinite}.loading-text{font-size:.8125rem;color:var(--color-gray-500)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInScale{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}.auth-card-wrapper{position:relative}.auth-footer{text-align:center;margin-top:24px;font-size:.75rem;color:var(--color-gray-400);letter-spacing:.02em}.auth-footer a{color:var(--color-primary);text-decoration:none;font-weight:500}.auth-footer a:hover{text-decoration:underline}@media (max-width: 480px){.login-page{padding:16px}.auth-body{padding:24px}.auth-brand{margin-bottom:24px}.brand-logo{width:48px;height:48px}.brand-logo svg{width:24px;height:24px}.brand-name{font-size:1.25rem}.form-group input{font-size:16px;min-height:44px}.btn{min-height:44px}}@media (prefers-color-scheme: dark){.loading-overlay{background:#111827d9}.brand-logo{box-shadow:0 4px 12px #818cf840}.auth-card{border-color:var(--color-gray-200)}}