:root{--blue:#2563eb;--ink:#172033;--muted:#68758b;--line:#dbe4f0;--paper:#f5f8fd;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #9abbff;outline-offset:2px}.referral-topbar,.referral-main{width:min(1120px,calc(100% - 40px));margin:auto}.referral-topbar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}.brand-mark{width:39px;height:39px;display:grid;place-items:center;border-radius:12px;background:var(--blue);color:#fff;font-weight:900}.brand b,.brand small{display:block}.brand small{margin-top:3px;color:var(--muted);font-size:8px;letter-spacing:.13em}.header-actions,.language-switch{display:flex;align-items:center;gap:8px}.header-actions>a,.language-switch button,.quiet{border:0;background:transparent;color:var(--muted);padding:8px;border-radius:8px;text-decoration:none}.language-switch button[aria-pressed="true"]{background:#e5efff;color:#1746ad;font-weight:800}.referral-main{padding:54px 0 76px}.login-card,.panel,.link-card{background:var(--white);border:1px solid var(--line);border-radius:18px;box-shadow:0 14px 38px rgba(29,66,130,.08)}.login-card{width:min(460px,100%);margin:40px auto;padding:31px}.eyebrow{margin:0 0 10px;color:var(--blue);font-size:10px;font-weight:900;letter-spacing:.14em}.login-card h1,.dashboard-head h1{margin:0 0 9px;font-size:clamp(31px,5vw,48px);letter-spacing:-.055em}.login-card>p:not(.eyebrow),#account-meta{color:var(--muted);font-size:13px;line-height:1.7}.login-card form,.profile-panel form{display:grid;gap:8px;margin-top:22px}.login-card label,.profile-panel label{font-size:11px;font-weight:800}.login-card input,.profile-panel input{min-height:46px;border:1px solid var(--line);border-radius:10px;padding:0 12px;background:#fbfdff}.primary,#copy-referral-link{min-height:46px;border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:850}.feedback{min-height:19px;margin:5px 0;color:var(--muted);font-size:12px}.feedback.error{color:#b33a4d}.feedback.success{color:#087652}.dashboard-head,.panel-head,.link-card,.copy-row{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.dashboard-head{margin-bottom:26px}.quiet{border:1px solid var(--line);background:#fff;color:var(--ink)}.link-card{padding:22px;margin-bottom:16px;align-items:center}.link-card h2,.panel h2{margin:0;font-size:18px}.link-card p{margin:7px 0 0;color:var(--muted);font-size:12px;line-height:1.6}.copy-row{align-items:stretch;width:min(550px,100%)}.copy-row code{flex:1;min-width:0;padding:12px;border-radius:10px;background:#f1f6ff;overflow-wrap:anywhere;font-size:11px}.copy-row button{padding:0 14px}.metrics{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:16px 0}.metrics article{padding:17px;border:1px solid var(--line);border-radius:14px;background:#fff}.metrics small,.data-row small{display:block;color:var(--muted);font-size:10px}.metrics b{display:block;margin-top:8px;font-size:18px;letter-spacing:-.04em}.dashboard-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.panel{padding:21px}.profile-panel{grid-column:span 2}.leaderboard{margin-top:16px}.data-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:13px 0;border-bottom:1px solid var(--line)}.data-row:last-child{border-bottom:0}.data-row b{display:block;margin-top:4px;overflow-wrap:anywhere;font-size:12px}.data-row.current{margin-inline:-8px;padding-inline:8px;border-radius:9px;background:#eaf2ff}.empty{margin:15px 0 0;color:var(--muted);font-size:12px}@media(max-width:700px){.referral-topbar,.referral-main{width:min(100% - 28px,1120px)}.referral-topbar{min-height:65px}.brand small{display:none}.referral-main{padding-top:25px}.dashboard-head,.link-card,.copy-row{display:grid;grid-template-columns:1fr}.metrics,.dashboard-grid{grid-template-columns:1fr}.profile-panel{grid-column:auto}.data-row{grid-template-columns:repeat(2,minmax(0,1fr))}.header-actions>a{display:none}.login-card{margin:16px auto;padding:22px}}