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40px;align-items:center;gap:1rem;font-size:.875rem}.bar-container{height:8px;background:var(--bg);border-radius:4px;overflow:hidden}.bar{height:100%;border-radius:4px;transition:width 1s ease-out}.bar.easy{background:var(--success)}.bar.medium{background:var(--warning)}.bar.hard{background:var(--error)}.activity-list{display:flex;flex-direction:column;gap:.75rem}.activity-item{display:flex;align-items:center;gap:.75rem;padding:.5rem 0;border-bottom:1px solid var(--border)}.activity-item .count{margin-left:auto;font-weight:700;color:var(--primary)}.empty-msg{color:var(--text-muted);font-style:italic;text-align:center}.upgrade-page{padding:1.5rem;max-width:600px;margin:0 auto;background:radial-gradient(circle at top right,rgba(245,158,11,.1),transparent)}.upgrade-content{margin-top:3rem;display:flex;flex-direction:column;gap:3rem}.plan-card.premium{padding:3rem 2rem;border-radius:var(--radius-lg);border:2px solid var(--primary);position:relative;text-align:center;background:linear-gradient(135deg,var(--surface),var(--bg));box-shadow:var(--shadow-xl)}.plan-icon{width:3rem;height:3rem;color:#f59e0b;margin-bottom:1rem}.plan-header h2{font-size:1.5rem;margin-bottom:1rem}.price{display:flex;align-items:baseline;justify-content:center;gap:.25rem;margin-bottom:2rem}.currency{font-size:1.25rem;font-weight:600}.amount{font-size:3.5rem;font-weight:800;color:var(--primary)}.period{font-size:1rem;color:var(--text-muted)}.plan-features{text-align:left;display:flex;flex-direction:column;gap:1rem;margin-bottom:3rem;padding:0;list-style:none}.plan-features li{display:flex;align-items:center;gap:1rem;font-size:1rem}.plan-features svg{color:var(--success);flex-shrink:0}.upgrade-btn{width:100%;height:60px;font-size:1.25rem;background:linear-gradient(135deg,#f59e0b,#d97706);box-shadow:0 4px 20px #f59e0b66}.secure-text{margin-top:1rem;font-size:.75rem;color:var(--text-muted)}.upgrade-comparison h3{text-align:center;margin-bottom:2rem}.comp-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}.comp-item{padding:1.5rem;border-radius:var(--radius-md);background:rgba(var(--primary-rgb),.05)}.comp-item svg{color:var(--primary);margin-bottom:1rem}.comp-item h4{margin-bottom:.5rem}.comp-item p{font-size:.875rem;color:var(--text-muted)}@media(max-width:480px){.comp-grid{grid-template-columns:1fr}}:root{--primary: #6366f1;--primary-light: #818cf8;--primary-dark: #4f46e5;--secondary: #ec4899;--accent: #f59e0b;--bg-light: #f8fafc;--surface-light: #ffffff;--text-light: #0f172a;--text-muted-light: #64748b;--border-light: #e2e8f0;--bg-dark: #0f172a;--surface-dark: #1e293b;--text-dark: #f8fafc;--text-muted-dark: #94a3b8;--border-dark: #334155;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition: all .3s cubic-bezier(.4, 0, .2, 1);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif}[data-theme=light]{--bg: var(--bg-light);--surface: var(--surface-light);--text: var(--text-light);--text-muted: var(--text-muted-light);--border: var(--border-light)}[data-theme=dark]{--bg: var(--bg-dark);--surface: var(--surface-dark);--text: var(--text-dark);--text-muted: var(--text-muted-dark);--border: var(--border-dark)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg);color:var(--text);transition:var(--transition);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{font-family:inherit;cursor:pointer;border:none;background:none}a{text-decoration:none;color:inherit}.glass{background:#ffffff1a;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}[data-theme=light] .glass{background:#ffffffb3;border:1px solid rgba(255,255,255,.3)}.container{max-width:600px;margin:0 auto;padding:0 1rem}.mobile-view{width:100%;max-width:480px;margin:0 auto;position:relative;min-height:100vh;display:flex;flex-direction:column}