*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #6366f1;--primary-dark: #4f46e5;--bg: #0f0f1a;--bg2: #1a1a2e;--bg3: #16213e;--card: #1e1e3a;--card2: #252545;--border: #2d2d5a;--text: #e2e8f0;--text-muted: #94a3b8;--success: #10b981;--danger: #ef4444;--warning: #f59e0b;--radius: 12px;--shadow: 0 4px 24px rgba(0,0,0,.4)}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;border:none;outline:none;transition:all .2s}input,textarea,select{font-family:inherit;outline:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg2)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes slideIn{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes xpFloat{0%{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-80px) scale(1.4)}}@keyframes shimmer{0%{background-position:-200% center}to{background-position:200% center}}@keyframes levelUpPop{0%{opacity:0;transform:translate(-50%,-50%) scale(.5)}70%{transform:translate(-50%,-50%) scale(1.06)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes levelUpFadeOut{0%{opacity:1;transform:translate(-50%,-50%) scale(1)}to{opacity:0;transform:translate(-50%,-50%) scale(.9)}}.animate-fade{animation:fadeIn .4s ease}.animate-slide{animation:slideIn .3s ease}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-12px)}to{opacity:1;transform:translate(-50%) translateY(0)}}.nav-label{display:inline}.nav-user-text,.nav-xp-badge{display:flex}.profile-grid{display:grid;grid-template-columns:1fr 2fr;gap:1.5rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;margin-bottom:2rem}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem}.achievement-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.diff-btn-row{display:flex;gap:.75rem;margin-bottom:1.5rem;flex-wrap:wrap}.page-pad{padding:2rem 1.5rem}@media(max-width:640px){.nav-label,.nav-user-text,.nav-xp-badge{display:none}.profile-grid{grid-template-columns:1fr}.achievement-grid,.stats-grid{grid-template-columns:1fr 1fr}.subjects-grid{grid-template-columns:1fr}.diff-btn-row>button{min-width:0!important;flex:1}.page-pad{padding:1rem .875rem}.levelup-banner{padding:1.5rem!important;width:90vw!important}}