:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-accent: #f59e0b;--color-bg: #f1f5f9;--color-surface: #ffffff;--color-text: #1e293b;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-success: #16a34a;--color-danger: #dc2626;--radius: 12px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6;-webkit-font-smoothing:antialiased}.app-header{background:var(--color-surface);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}.logo{font-size:20px;font-weight:700;color:var(--color-primary);display:flex;align-items:center;gap:8px}.logo-icon{font-size:24px;color:var(--color-accent)}.header-nav a{text-decoration:none;color:var(--color-text-muted);font-weight:500;padding:8px 16px;border-radius:8px;transition:all .2s}.header-nav a:hover,.header-nav a.active{background:var(--color-primary);color:#fff}.app-main{max-width:1200px;margin:0 auto;padding:32px 24px 64px;min-height:calc(100vh - 128px)}.app-footer{text-align:center;padding:20px;color:var(--color-text-muted);font-size:13px;border-top:1px solid var(--color-border)}.card{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:28px}.card-title{font-size:14px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted);margin-bottom:8px}.card-value{font-size:36px;font-weight:700;color:var(--color-text)}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:32px}.dashboard-section{margin-bottom:32px}.section-title{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--color-text)}.leaderboard-table{width:100%;border-collapse:collapse;background:var(--color-surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md)}.leaderboard-table th,.leaderboard-table td{padding:14px 20px;text-align:left}.leaderboard-table th{background:#f8fafc;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--color-text-muted);border-bottom:2px solid var(--color-border)}.leaderboard-table td{border-bottom:1px solid var(--color-border);font-size:14px}.leaderboard-table tr:last-child td{border-bottom:none}.leaderboard-table tr:hover td{background:#f8fafc}.rank-badge{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;font-size:12px;font-weight:700}.rank-1{background:#fef3c7;color:#92400e}.rank-2{background:#e5e7eb;color:#374151}.rank-3{background:#fed7aa;color:#9a3412}.rating-stars{color:var(--color-accent);font-size:16px;letter-spacing:2px}.feedback-container{max-width:560px;margin:40px auto}.feedback-card{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:40px;text-align:center}.feedback-card h2{margin-bottom:8px;font-size:24px}.feedback-card p{color:var(--color-text-muted);margin-bottom:28px}.star-rating-container{display:flex;justify-content:center;gap:8px;margin-bottom:24px}.star-btn{background:none;border:none;font-size:40px;cursor:pointer;transition:transform .15s,color .15s;color:#d1d5db;line-height:1;padding:4px}.star-btn:hover{transform:scale(1.2)}.star-btn.active{color:var(--color-accent)}.comment-box{width:100%;min-height:100px;padding:14px;border:2px solid var(--color-border);border-radius:8px;font-family:inherit;font-size:14px;resize:vertical;transition:border-color .2s;margin-bottom:20px}.comment-box:focus{outline:none;border-color:var(--color-primary)}.submit-btn{width:100%;padding:14px 24px;background:var(--color-primary);color:#fff;font-size:16px;font-weight:600;border:none;border-radius:8px;cursor:pointer;transition:background .2s,transform .1s}.submit-btn:hover{background:var(--color-primary-dark)}.submit-btn:active{transform:scale(.98)}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.success-card{text-align:center;padding:60px 40px}.success-icon{font-size:64px;margin-bottom:16px}.success-card h2{color:var(--color-success);margin-bottom:8px}.error-card{text-align:center;padding:60px 40px;color:var(--color-danger)}.loading{text-align:center;padding:60px;color:var(--color-text-muted)}.spinner{display:inline-block;width:32px;height:32px;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.trend-chart-container{position:relative}.trend-line-svg{width:100%;height:auto;display:block}.trend-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:16px}.trend-header .section-title{margin-bottom:0}.date-picker-row{display:flex;align-items:center;gap:8px}.date-input{padding:7px 12px;border:2px solid var(--color-border);border-radius:8px;font-size:13px;font-family:inherit;color:var(--color-text);background:var(--color-surface);transition:border-color .2s}.date-input:focus{outline:none;border-color:var(--color-primary)}.date-separator{font-size:13px;color:var(--color-text-muted)}.date-apply-btn{padding:7px 16px;background:var(--color-primary);color:#fff;border:none;border-radius:8px;font-size:13px;font-weight:600;cursor:pointer;font-family:inherit;transition:background .2s}.date-apply-btn:hover{background:var(--color-primary-dark)}.date-apply-btn:disabled{opacity:.4;cursor:not-allowed}.date-clear-btn{padding:7px 12px;background:none;color:var(--color-text-muted);border:2px solid var(--color-border);border-radius:8px;font-size:13px;cursor:pointer;font-family:inherit;transition:all .2s}.date-clear-btn:hover{border-color:var(--color-danger);color:var(--color-danger)}.chart-tooltip{position:absolute;transform:translate(-50%,-100%);background:var(--color-text);color:#fff;border-radius:10px;padding:12px 16px;font-size:13px;pointer-events:none;z-index:50;white-space:nowrap;box-shadow:0 4px 16px #0003}.chart-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:var(--color-text)}.chart-tooltip-date{font-weight:700;margin-bottom:6px;font-size:13px}.chart-tooltip-row{line-height:1.6;font-size:12px}.chart-tooltip-star{color:var(--color-accent)}.grid-line{stroke:var(--color-border);stroke-width:1;stroke-dasharray:4 4}.axis-label{font-size:11px;fill:var(--color-text-muted);font-family:inherit}.axis-sub{font-size:9px;fill:var(--color-text-muted);font-family:inherit}.trend-area{fill:#2563eb14}.trend-line-path{fill:none;stroke:var(--color-primary);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.trend-dot{fill:var(--color-primary);stroke:#fff;stroke-width:2;transition:r .15s}.trend-dot-hover{fill:transparent;cursor:pointer}.trend-dot-hover:hover+.trend-dot,.trend-dot-hover:hover~.trend-dot{r:7}.dot-label{font-size:11px;font-weight:700;fill:var(--color-text);font-family:inherit}.trend-arrow{font-size:14px;margin-left:8px;font-weight:600}.trend-up{color:var(--color-success)}.trend-down{color:var(--color-danger)}.trend-flat{color:var(--color-text-muted)}.view-all-btn{padding:10px 28px;background:var(--color-surface);color:var(--color-primary);border:2px solid var(--color-primary);border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;font-family:inherit;transition:all .2s}.view-all-btn:hover{background:var(--color-primary);color:#fff}.header-nav{display:flex;align-items:center;gap:12px}.profile-menu-wrapper{position:relative}.profile-btn{width:36px;height:36px;border-radius:50%;background:var(--color-primary);color:#fff;border:none;font-size:15px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .15s,box-shadow .15s}.profile-btn:hover{transform:scale(1.08);box-shadow:0 2px 8px #2563eb4d}.profile-overlay{position:fixed;inset:0;z-index:199}.profile-dropdown{position:absolute;top:44px;right:0;width:240px;background:var(--color-surface);border-radius:var(--radius);box-shadow:0 8px 32px #00000026;z-index:200;overflow:hidden}.profile-dropdown-header{display:flex;align-items:center;gap:12px;padding:16px}.profile-avatar-lg{width:40px;height:40px;border-radius:50%;background:var(--color-primary);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}.profile-dropdown-divider{height:1px;background:var(--color-border)}.profile-dropdown-item{display:block;width:100%;padding:12px 16px;background:none;border:none;text-align:left;font-size:14px;cursor:pointer;font-family:inherit;transition:background .15s}.profile-dropdown-item:hover{background:#f8fafc}.logout-item{color:var(--color-danger);font-weight:500}.cf-form-wrapper{max-width:680px;margin:0 auto;padding:32px 16px 48px}.cf-form-card{background:var(--color-surface);border-radius:12px;box-shadow:0 2px 12px #00000014;overflow:hidden}.cf-form-header{background:#6b2fa0;color:#fff;padding:36px 40px 28px;border-top:6px solid #4A1A72}.cf-form-header h1{font-size:26px;font-weight:700;margin-bottom:12px}.cf-form-header p{font-size:14px;line-height:1.7;opacity:.92;margin:0;color:#fff}.cf-form-body{padding:32px 40px 40px}.cf-form-body.cf-center{text-align:center;padding:60px 40px}.cf-required-note{font-size:13px;color:var(--color-text-muted);margin-bottom:28px}.cf-required{color:#dc2626;font-weight:700}.cf-question{margin-bottom:32px;padding-bottom:28px;border-bottom:1px solid var(--color-border)}.cf-question:last-of-type{border-bottom:none;margin-bottom:28px;padding-bottom:0}.cf-question-label{display:block;font-size:15px;font-weight:600;color:var(--color-text);margin-bottom:16px;line-height:1.5}.cf-rating-scale{margin-top:8px}.cf-rating-labels{display:flex;justify-content:space-between;font-size:12px;color:var(--color-text-muted);margin-bottom:10px;padding:0 4px}.cf-rating-dots{display:flex;gap:12px}.cf-rating-dot{width:44px;height:44px;border-radius:50%;border:2px solid #d1d5db;background:#fff;font-size:15px;font-weight:600;color:var(--color-text-muted);cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center;font-family:inherit}.cf-rating-dot:hover{border-color:#6b2fa0;color:#6b2fa0;background:#f3e8ff}.cf-rating-dot.active{border-color:#6b2fa0;background:#6b2fa0;color:#fff}.cf-radio-group{display:flex;flex-direction:column;gap:10px}.cf-radio-label{display:flex;align-items:center;gap:12px;cursor:pointer;padding:10px 14px;border-radius:8px;transition:background .15s}.cf-radio-label:hover{background:#f8f5fc}.cf-radio-label.active{background:#f3e8ff}.cf-radio-label input[type=radio]{display:none}.cf-radio-circle{width:20px;height:20px;border-radius:50%;border:2px solid #d1d5db;flex-shrink:0;position:relative;transition:border-color .2s}.cf-radio-label.active .cf-radio-circle{border-color:#6b2fa0}.cf-radio-label.active .cf-radio-circle:after{content:"";position:absolute;top:3px;left:3px;width:10px;height:10px;border-radius:50%;background:#6b2fa0}.cf-radio-text{font-size:14px;color:var(--color-text)}.cf-textarea{width:100%;min-height:90px;padding:14px;border:2px solid var(--color-border);border-bottom:3px solid var(--color-border);border-radius:0;font-family:inherit;font-size:14px;resize:vertical;transition:border-color .2s;background:#fff}.cf-textarea:focus{outline:none;border-bottom-color:#6b2fa0}.cf-textarea::placeholder{color:#aaa}.cf-submit-btn{display:block;width:auto;padding:12px 40px;background:#6b2fa0;color:#fff;font-size:15px;font-weight:600;border:none;border-radius:4px;cursor:pointer;transition:background .2s,transform .1s;font-family:inherit;margin-top:8px}.cf-submit-btn:hover{background:#5a2488}.cf-submit-btn:active{transform:scale(.98)}.cf-submit-btn:disabled{opacity:.5;cursor:not-allowed}.cf-success-icon{font-size:64px;margin-bottom:16px}.cf-form-footer{text-align:center;margin-top:20px}.cf-form-footer p{font-size:12px;color:var(--color-text-muted)}.cf-form-loading{text-align:center;padding:60px 40px;color:var(--color-text-muted)}@media(max-width:640px){.header-inner{padding:0 16px}.app-main{padding:20px 16px 48px}.feedback-card{padding:28px 20px}.star-btn{font-size:32px}.cf-form-header{padding:28px 20px 20px}.cf-form-header h1{font-size:22px}.cf-form-body{padding:24px 20px 32px}.cf-rating-dots{gap:8px}.cf-rating-dot{width:38px;height:38px;font-size:13px}.card-value{font-size:28px}}