:root{--text:#4b5563;--text-h:#111827;--bg:#f9fafb;--surface:#fff;--border:#e5e7eb;--accent:#6366f1;--accent-hover:#4f46e5;--accent-bg:#6366f11a;--danger:#ef4444;--danger-hover:#dc2626;--success:#22c55e;--warning:#f59e0b;--warning-hover:#d97706;--warning-bg:#f59e0b1a;--shadow:#0000001a 0 4px 6px -1px, #0000000d 0 2px 4px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:16px/150% var(--sans);color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--text:#d1d5db;--text-h:#f3f4f6;--bg:#0f172a;--surface:#1f2937;--border:#374151;--accent:#818cf8;--accent-hover:#6366f1;--accent-bg:#818cf826;--danger:#f87171;--danger-hover:#ef4444;--success:#4ade80;--warning:#fbbf24;--warning-hover:#f59e0b;--warning-bg:#fbbf2426}}body{margin:0}#root{box-sizing:border-box;max-width:800px;min-height:100svh;margin:0 auto;padding:24px}h1,h2,h3{font-family:var(--heading);color:var(--text-h);margin:0;font-weight:600}h1{font-size:28px}h2{font-size:22px}h3{margin-bottom:12px;font-size:18px}button{font:inherit;cursor:pointer;border:none;border-radius:8px;padding:8px 14px;transition:background .2s,transform .1s}button:active{transform:translateY(1px)}input,select{font:inherit;border:1px solid var(--border);background:var(--surface);color:var(--text-h);border-radius:8px;outline:none;padding:8px 10px}input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-bg)}label{color:var(--text-h);flex-direction:column;gap:6px;font-weight:500;display:flex}.app-loading{text-align:center;color:var(--text);padding:40px}.app-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.points-badge{background:var(--accent-bg);color:var(--accent);border-radius:999px;padding:8px 14px;font-size:14px;font-weight:700}.app-nav{background:var(--surface);box-shadow:var(--shadow);border-radius:12px;gap:8px;margin-bottom:24px;padding:6px;display:flex}.app-nav button{color:var(--text);background:0 0;flex:1 1 0;padding:10px;font-weight:500}.app-nav button.active{background:var(--accent);color:#fff}.app-main section{flex-direction:column;gap:16px;display:flex}.section-header{justify-content:space-between;align-items:center;display:flex}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:var(--border);color:var(--text-h)}.btn-secondary:hover{background:#d1d5db}.btn-danger{color:var(--danger);border:1px solid var(--danger);background:0 0;padding:6px 12px;font-size:14px}.btn-danger:hover{background:#ef44441a}.task-form,.reward-form{background:var(--surface);box-shadow:var(--shadow);border-radius:12px;flex-direction:column;gap:14px;padding:20px;display:flex}.form-actions{justify-content:flex-end;gap:10px;margin-top:4px;display:flex}.day-selector{flex-wrap:wrap;gap:8px;display:flex}.day-selector button{background:var(--bg);border:1px solid var(--border);min-width:44px;color:var(--text);flex:calc(14% - 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