:root{--fg: #1a1a1a;--muted: #6b7280;--border: #e5e7eb;--accent: #5865f2;--bg: #ffffff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}*{box-sizing:border-box}body{margin:0}.header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.5rem}.brand{font-size:1.5rem;font-weight:800;letter-spacing:.05em}.header-right{display:flex;align-items:center;gap:.75rem;margin-left:auto}.hero{display:flex;align-items:center;justify-content:center;min-height:calc(100vh - 8rem);font-size:clamp(6rem,28vw,22rem);font-weight:800;letter-spacing:.06em}.user{color:var(--muted);font-size:.9rem}.btn{border:1px solid var(--accent);background:var(--accent);color:#fff;padding:.45rem 1rem;border-radius:6px;font-size:.9rem;cursor:pointer}.btn:hover{opacity:.9}.content{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - 4rem);padding:2rem 1.5rem}.table-title{margin:0 0 1rem;font-size:1.25rem;font-weight:600}.retention{margin:0 0 1rem;color:var(--muted);font-size:.9rem}.retention strong{color:var(--fg);font-weight:600}.stats{border-collapse:collapse;min-width:760px;font-size:.95rem}.stats th,.stats td{border:1px solid var(--border);padding:.6rem 1rem;text-align:right}.stats thead th{background:#f9fafb;font-weight:600}.stats th.metric{text-align:left;font-weight:500}.error{color:#b91c1c}