:root{--color-primary: #0f172a;--color-primary-light: #1e293b;--color-background: #f8fafc;--color-surface: #ffffff;--color-success: #22c55e;--color-accent: #f59e0b;--color-text-primary: #334155;--color-text-secondary: #64748b;--color-border: #e2e8f0;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--color-background);color:var(--color-text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{cursor:pointer;border:none;font-family:inherit}input,select,textarea{font-family:inherit}.container{max-width:480px;margin:0 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ease;text-align:center}.upload-card.done{border-color:#39b3a8;background:#f0fdf4;border-style:solid}.card-header{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:12px}.step-num{background:#39b3a8;color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}.upload-btn{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:20px;background:#f8fafc;border:1px solid #e2e8f0;padding:10px 16px;border-radius:8px;cursor:pointer;font-weight:500;color:#475569;transition:all .2s}.upload-btn:hover{background:#f1f5f9;border-color:#cbd5e1}.merge-arrow{color:#94a3b8}.merge-action-btn{width:100%;background:#39b3a8;color:#fff;border:none;padding:16px;border-radius:12px;font-size:18px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;margin-top:20px;transition:transform .2s,background .2s}.merge-action-btn:hover:not(:disabled){background:#2f669a;transform:translateY(-2px)}.page-title,.card-header h3{color:#2f669a}.merge-action-btn:disabled{background:#94a3b8;cursor:not-allowed}.status-banner{padding:12px;border-radius:8px;margin-top:20px;display:flex;align-items:center;gap:10px;font-weight:500}.status-banner.error{background:#fee2e2;color:#991b1b}.status-banner.success{background:#dcfce7;color:#166534}.status-banner.info{background:#dbeafe;color:#1e40af}.info-box{margin-top:40px;background:#f8fafc;padding:20px;border-radius:12px;border-left:4px solid #39B3A8}.info-box h4{margin-bottom:10px;color:#1e293b}.info-box ul{list-style:disc;padding-left:20px;color:#64748b}.info-box li{margin-bottom:6px}@media(max-width:600px){.upload-section{flex-direction:column}.merge-arrow{transform:rotate(90deg)}}.login-container{height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f8fafc,#e2e8f0);padding:20px;z-index:1000;position:fixed;inset:0}.login-card{background:#fff;width:100%;max-width:400px;padding:40px;border-radius:24px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.login-header{text-align:center;margin-bottom:32px}.logo-placeholder{width:64px;height:64px;background:var(--color-primary);color:#fff;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;margin:0 auto 16px;box-shadow:0 10px 15px -3px #2563eb4d}.login-header h1{font-size:24px;color:#1e293b;margin-bottom:8px}.login-header p{color:#64748b}.login-form{display:flex;flex-direction:column;gap:16px}.input-group{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:12px;color:#94a3b8}.input-group input{width:100%;padding:12px 12px 12px 42px;border:1px solid #e2e8f0;border-radius:12px;font-size:16px;transition:all .2s;background:#f8fafc}.input-group input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a;background:#fff}.auth-error{background:#fee2e2;color:#991b1b;padding:12px;border-radius:8px;display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500}.login-submit-btn{background:var(--color-primary);color:#fff;border:none;padding:14px;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;margin-top:8px;transition:all .2s}.login-submit-btn:hover:not(:disabled){background:#1d4ed8;transform:translateY(-1px)}.login-submit-btn:disabled{opacity:.7;cursor:not-allowed}.login-divider{display:flex;align-items:center;text-align:center;margin:8px 0;color:#94a3b8;font-size:14px}.login-divider:before,.login-divider:after{content:"";flex:1;border-bottom:1px solid #e2e8f0}.login-divider span{padding:0 12px}.google-login-btn{display:flex;align-items:center;justify-content:center;gap:12px;background:#fff;color:#475569;border:1px solid #e2e8f0;padding:12px;border-radius:12px;font-size:16px;font-weight:500;cursor:pointer;transition:all .2s}.google-login-btn:hover:not(:disabled){background:#f8fafc;border-color:#cbd5e1}.login-footer{margin-top:24px;text-align:center}.login-footer p{color:#64748b;font-size:14px}.toggle-auth-btn{background:none;border:none;color:var(--color-primary);font-weight:600;margin-left:5px;cursor:pointer;padding:0}.toggle-auth-btn:hover{text-decoration:underline}.dashboard-container{padding:24px;background-color:var(--color-background);min-height:calc(100vh - 70px)}.dashboard-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:32px}.dashboard-title{font-size:28px;font-weight:800;color:var(--color-text-primary);margin:0}.dashboard-subtitle{font-size:14px;color:var(--color-text-secondary);margin-top:4px}.dashboard-date{background:var(--color-surface);padding:8px 16px;border-radius:12px;font-size:13px;font-weight:600;color:var(--color-primary);border:1px solid var(--color-border)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;margin-bottom:32px}.stat-card{background:var(--color-surface);padding:24px;border-radius:20px;border:1px solid var(--color-border);display:flex;align-items:center;gap:20px;transition:transform .3s ease,box-shadow .3s ease}.stat-card:hover{transform:translateY(-5px);box-shadow:0 10px 20px #0000000d}.stat-icon-wrapper{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center}.stat-icon-wrapper.total{background:#2563eb1a;color:#2563eb}.stat-icon-wrapper.male{background:#4f46e51a;color:#4f46e5}.stat-icon-wrapper.female{background:#10b9811a;color:#10b981}.stat-info{flex:1}.stat-label{font-size:13px;font-weight:600;color:var(--color-text-secondary);display:block}.stat-value{font-size:24px;font-weight:800;color:var(--color-text-primary);margin:4px 0}.stat-percentage{font-size:12px;font-weight:700;color:var(--color-primary);background:var(--color-primary-light);padding:2px 8px;border-radius:6px}.chart-card{background:var(--color-surface);padding:28px;border-radius:24px;border:1px solid var(--color-border)}.chart-header{display:flex;align-items:center;gap:12px;margin-bottom:32px}.chart-icon{color:var(--color-primary)}.chart-header h3{margin:0;font-size:18px;font-weight:700;color:var(--color-text-primary)}.pie-chart-wrapper{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:40px}.pie-svg{transform:rotate(-90deg)}.pie-bg{fill:none;stroke:var(--color-border);stroke-width:25}.pie-segment{fill:none;stroke-width:25;stroke-linecap:round;transition:stroke-dashoffset 1s cubic-bezier(.4,0,.2,1)}.pie-segment.female{stroke:#10b981}.pie-segment.male{stroke:#4f46e5}.pie-legend{display:flex;flex-direction:column;gap:12px}.legend-item{display:flex;align-items:center;gap:10px}.legend-dot{width:12px;height:12px;border-radius:50%}.legend-dot.male{background-color:#4f46e5}.legend-dot.female{background-color:#10b981}.legend-text{font-size:14px;font-weight:600;color:var(--color-text-secondary)}.dashboard-loading{height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;color:var(--color-text-secondary)}.loader-pulse{width:40px;height:40px;background-color:var(--color-primary);border-radius:50%;animation:loaderPulse 1s ease-in-out infinite}@keyframes loaderPulse{0%{transform:scale(.8);opacity:.5}50%{transform:scale(1.1);opacity:1}to{transform:scale(.8);opacity:.5}}@media(max-width:600px){.pie-chart-wrapper{flex-direction:column}}.bottom-nav{position:fixed;bottom:0;left:0;width:100%;height:70px;background-color:var(--color-surface);border-top:1px solid var(--color-border);display:flex;justify-content:space-around;align-items:center;z-index:100;padding-bottom:env(safe-area-inset-bottom)}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--color-text-secondary);text-decoration:none;background:none;border:none;width:60px;height:100%}.nav-item.active{color:var(--color-primary)}.nav-item-center{position:relative;width:70px;height:70px;display:flex;justify-content:center;align-items:flex-end}.camera-btn{position:absolute;top:-20px;width:64px;height:64px;background-color:var(--color-surface);border-radius:50%;display:flex;justify-content:center;align-items:center;box-shadow:0 -4px 10px #0000000d}.camera-inner{width:54px;height:54px;background-color:var(--color-primary);border-radius:50%;display:flex;justify-content:center;align-items:center;box-shadow:0 4px 10px #0f172a66}.setup-modal-overlay{position:fixed;inset:0;background:#000000e6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:flex;align-items:flex-start;justify-content:center;z-index:99999;padding:40px 20px;overflow-y:auto}.setup-modal-card{background:#fff;width:100%;max-width:500px;border-radius:28px;padding:40px;box-shadow:0 25px 50px -12px #00000080;position:relative;margin-bottom:40px}.setup-modal-header h2{margin:0 0 12px;color:#000;font-size:1.75rem;font-weight:800}.setup-modal-header p{color:#4b5563;margin:0 0 32px;line-height:1.6;font-size:1rem}.setup-modal-form{display:flex;flex-direction:column;gap:24px}.setup-field{display:flex;flex-direction:column;gap:10px}.setup-field label{font-size:.95rem;font-weight:700;color:#111827}.setup-input{padding:14px 18px;border:2px solid 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