:root{--navy:#172554;--blue:#2563eb;--soft:#eff6ff;--bg:#f8fafc;--muted:#64748b;--line:#dbe4f0;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:#111827;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.55}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(180deg,#fff 0,var(--bg) 55%)}.auth-card{width:min(440px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:36px;box-shadow:0 18px 50px rgba(23,37,84,.08)}.auth-logo{display:block;text-align:center;color:var(--navy);font-weight:800;font-size:28px;letter-spacing:-.04em;text-decoration:none;margin-bottom:28px}.auth-card h1{color:var(--navy);font-size:32px;line-height:1.1;text-align:center;margin:0 0 8px}.auth-sub{text-align:center;color:var(--muted);margin:0 0 26px}.auth-group{margin:0 0 16px}.auth-group label{display:block;color:var(--navy);font-weight:750;margin-bottom:7px}.auth-group input{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:#111827;font:inherit}.auth-group input:focus{outline:3px solid #dbeafe;border-color:#7da4f5}.auth-button{width:100%;min-height:48px;border:0;border-radius:10px;background:var(--blue);color:#fff;font:inherit;font-weight:750;cursor:pointer}.auth-button.alt{margin-top:10px;background:#fff;color:var(--navy);border:1px solid var(--line)}.auth-divider{text-align:center;color:var(--muted);margin:22px 0 10px;font-size:14px}.auth-links{text-align:center;color:var(--muted);font-size:14px;margin-top:22px}.auth-links a{color:var(--blue);font-weight:700;text-decoration:none}.auth-error{color:#b91c1c;background:#fef2f2;border-radius:8px;padding:10px;margin-top:14px;text-align:center;font-size:14px}.profile-shell{width:min(1100px,calc(100% - 32px));margin:auto;padding:28px 0 70px}.profile-nav{display:flex;justify-content:space-between;align-items:center;margin-bottom:36px}.profile-nav a{color:var(--navy);font-weight:800;text-decoration:none}.profile-nav .links{display:flex;gap:20px;align-items:center}.profile-hero,.profile-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 28px rgba(23,37,84,.05)}.profile-hero{padding:32px;display:flex;gap:22px;align-items:center}.profile-avatar{width:78px;height:78px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--blue);font-weight:800;font-size:30px}.profile-hero h1{color:var(--navy);margin:0;font-size:32px}.profile-muted{color:var(--muted)}.profile-section{margin-top:32px}.profile-section h2{color:var(--navy);font-size:26px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{padding:22px;text-align:center}.stat strong{display:block;color:var(--navy);font-size:30px}.stat span{color:var(--muted);font-size:14px}.achievement-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.achievement{padding:20px;text-align:center;opacity:.5}.achievement.unlocked{opacity:1;border-color:#93b4fa}.share-button{margin-top:16px;padding:12px 18px;border:0;border-radius:10px;background:var(--blue);color:#fff;font-weight:750}@media(max-width:700px){.auth-card{padding:26px}.profile-hero{align-items:flex-start;flex-direction:column}.stats,.achievement-grid{grid-template-columns:1fr 1fr}.profile-nav .links a:not(:last-child){display:none}}