:root{--primary-color: #5b7cf6;--primary-dark: #4c68d6;--text-primary: #333333;--text-secondary: #999999;--text-light: #cccccc;--border-color: #e8e8e8;--bg-light: #f0f2f5;--bg-white: #ffffff;--shadow-color: rgba(0, 0, 0, .08)}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;width:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-light);color:var(--text-primary);display:flex;flex-direction:column;min-height:100vh}.auth-container{flex:1;display:flex;flex-direction:column;padding:20px}.auth-header{padding:30px 40px;text-align:left}.auth-brand{font-size:16px;font-weight:600;color:var(--text-primary);letter-spacing:.3px}.auth-content{flex:1;display:flex;align-items:center;justify-content:center;padding:20px}.auth-card{background-color:var(--bg-white);border-radius:8px;box-shadow:0 1px 3px var(--shadow-color);width:100%;max-width:450px;overflow:hidden}.auth-tabs{display:flex;border-bottom:1px solid var(--border-color);background-color:var(--bg-white)}.auth-tab{flex:1;padding:18px 20px;text-align:center;cursor:pointer;border:none;background:none;font-size:13px;font-weight:600;color:var(--text-light);text-transform:uppercase;letter-spacing:.8px;position:relative;transition:all .3s ease;border-bottom:3px solid transparent;margin-bottom:-1px}.auth-tab:hover{color:var(--text-secondary)}.auth-tab.active{color:var(--text-primary);border-bottom:3px solid var(--primary-color)}.auth-body{padding:40px}.auth-panel{display:none}.auth-panel.active{display:block;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.form-group{margin-bottom:20px}.form-label{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;display:block}.form-control,.form-select{border:1px solid var(--border-color);border-radius:4px;padding:10px 12px;font-size:14px;color:var(--text-primary);background-color:var(--bg-white);transition:border-color .3s ease,box-shadow .3s ease}.form-control::placeholder,.form-select{color:#999}.form-control:focus,.form-select:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #5b7cf61a;outline:none}.form-select{background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");background-repeat:no-repeat;background-position:right 12px center;background-size:16px 12px;padding-right:40px;-webkit-appearance:none;-moz-appearance:none;appearance:none}.form-check{display:flex;align-items:center;margin-bottom:20px}.form-check-input{width:18px;height:18px;margin-right:8px;cursor:pointer;border:1px solid var(--border-color);border-radius:3px;accent-color:var(--primary-color)}.form-check-label{font-size:14px;color:var(--text-primary);cursor:pointer;margin-bottom:0}.form-footer{display:flex;align-items:center;justify-content:space-between;font-size:13px;margin-bottom:24px}.form-footer a{color:var(--primary-color);text-decoration:none;font-weight:500;transition:color .3s ease}.form-footer a:hover{color:var(--primary-dark);text-decoration:underline}.btn-auth{width:100%;padding:12px;font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s ease,transform .1s ease}.btn-sign-in,.btn-register{background-color:var(--primary-color);color:#fff;margin-bottom:16px}.btn-sign-in:hover,.btn-register:hover{background-color:var(--primary-dark);transform:translateY(-2px)}.btn-sign-in:active,.btn-register:active{transform:translateY(0)}.account-prompt{text-align:center;padding-top:16px;border-top:1px solid var(--border-color)}.account-prompt-title{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px}.account-prompt-text{font-size:13px;color:var(--text-primary)}.account-prompt-link{color:var(--primary-color);text-decoration:none;font-weight:600;cursor:pointer;transition:color .3s ease}.account-prompt-link:hover{color:var(--primary-dark)}.invalid-feedback{display:block;font-size:12px;color:#d32f2f;margin-top:6px;font-weight:500}.is-invalid{border-color:#d32f2f!important;background-color:#fafafa}.is-invalid:focus{border-color:#d32f2f!important;box-shadow:0 0 0 3px #d32f2f14!important}.alert{border-radius:6px;font-size:14px;margin-bottom:20px;padding:14px 16px;border:1px solid transparent}.alert-danger{background-color:#fee;border-color:#fcc;color:#c33}.alert-success{background-color:#efe;border-color:#cfc;color:#3c3}.alert ul{margin-bottom:0;padding-left:20px}.alert li{margin-bottom:4px;font-weight:500}.alert-dismissible{padding-right:40px}.alert .btn-close{opacity:.5;transition:opacity .2s ease}.alert .btn-close:hover{opacity:.8}@media (max-width: 480px){.auth-body{padding:30px 20px}.auth-brand{font-size:16px}.form-label{font-size:11px}.form-control,.form-select{font-size:13px;padding:9px 11px}.btn-auth{padding:11px;font-size:13px}.form-footer{font-size:12px}.auth-tab{padding:14px 15px;font-size:12px}}.d-flex{display:flex}.gap-2{gap:8px}.text-center{text-align:center}.mb-3{margin-bottom:20px}.mt-2{margin-top:8px}