.sidebar{width:250px;background:rgba(8,12,28,0.4);border-right:1px solid var(--border);backdrop-filter:blur(30px) saturate(180%);-webkit-backdrop-filter:blur(30px) saturate(180%);display:flex;flex-direction:column;padding:2rem 1.25rem;position:fixed;top:0;bottom:0;left:0;z-index:100;box-shadow:inset 0 1px 1px rgba(255,255,255,0.02),4px 0 24px rgba(0,0,0,0.25);overflow-x:hidden;overflow-y:auto;}.sidebar::-webkit-scrollbar{width:4px;}.sidebar::-webkit-scrollbar-track{background:rgba(255,255,255,0.02);border-radius:99px;}.sidebar::-webkit-scrollbar-thumb{background:rgba(56,189,248,0.25);border-radius:99px;border:1px solid rgba(255,255,255,0.04);}.sidebar::-webkit-scrollbar-thumb:hover{background:rgba(56,189,248,0.5);}.brand-container{display:flex;align-items:center;gap:0.6rem;margin-bottom:3.0rem;}.brand-text{font-family:'Outfit',sans-serif;font-weight:700;font-size:1.05rem;color:#fff;}.section-header{font-size:0.7rem;text-transform:uppercase;color:var(--text-muted);letter-spacing:0.1em;font-weight:700;margin-bottom:0.8rem;}.nav-item{display:flex;align-items:center;padding:0.75rem 1rem;color:var(--text-secondary);text-decoration:none;border-radius:12px;font-size:0.88rem;font-weight:600;margin-bottom:0.4rem;border:1px solid transparent;transition:all 0.3s cubic-bezier(0.16,1,0.3,1);}.nav-item:hover{background:rgba(255,255,255,0.03);color:#fff;border-color:rgba(255,255,255,0.05);transform:translateX(4px);}.active-nav{background:linear-gradient(135deg,rgba(56,189,248,0.08),rgba(16,185,129,0.03)) !important;color:var(--primary) !important;border-left:3px solid var(--primary) !important;border-top:1px solid rgba(56,189,248,0.15) !important;border-bottom:1px solid rgba(56,189,248,0.15) !important;border-right:1px solid rgba(56,189,248,0.15) !important;box-shadow:0 4px 20px rgba(56,189,248,0.05);}.beginner-card{background:rgba(56,189,248,0.02);border:1px solid rgba(56,189,248,0.05);border-radius:14px;padding:1.2rem;margin-top:auto;transition:all 0.3s cubic-bezier(0.16,1,0.3,1);box-shadow:inset 0 1px 1px rgba(255,255,255,0.01);}.beginner-card:hover{border-color:rgba(56,189,248,0.15);background:rgba(56,189,248,0.04);box-shadow:0 8px 24px rgba(56,189,248,0.04);}.beginner-card h4{font-size:0.8rem;font-weight:700;color:var(--primary);margin-bottom:0.4rem;white-space:nowrap;}.beginner-card p{font-size:0.72rem;color:#64748b;line-height:1.5;}.main-content{margin-left:250px;flex:1;padding:2.5rem 3rem;min-width:0;max-width:100%;}.header-accent{position:absolute;bottom:-1px;left:0;width:120px;height:2px;background:linear-gradient(90deg,var(--success),var(--primary),transparent);box-shadow:0 0 10px rgba(56,189,248,0.5);border-radius:2px;}.header-nav-pills{display:flex;flex-wrap:wrap;align-items:center;gap:0.35rem;background:rgba(6,9,20,0.72);border:1px solid rgba(255,255,255,0.08);border-radius:14px;padding:0.35rem;margin-bottom:0.8rem;backdrop-filter:blur(12px);box-shadow:0 1px 8px rgba(0,0,0,0.35),inset 0 1px 0 rgba(255,255,255,0.03);overflow-x:auto;overflow-y:visible;-webkit-overflow-scrolling:touch;scrollbar-width:none;max-width:100%;width:fit-content;}.header-nav-pills::-webkit-scrollbar{display:none;}.nav-pill-btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.38rem 0.8rem;border-radius:10px;font-family:'DM Sans','Outfit',sans-serif;font-size:0.72rem;font-weight:600;letter-spacing:0.03em;color:#64748b;text-decoration:none;transition:all 0.18s cubic-bezier(0.4,0,0.2,1);white-space:nowrap;flex-shrink:0;position:relative;background:rgba(255,255,255,0.025);border:1px solid transparent;}.nav-pill-btn .pill-icon{opacity:0.75;flex-shrink:0;transition:opacity 0.18s;}.nav-pill-btn .pill-label{display:inline;}.nav-pill-btn:hover{color:#cbd5e1;background:rgba(255,255,255,0.05);}.nav-pill-btn:hover .pill-icon{opacity:1;}.nav-pill-btn.active{background:rgba(56,189,248,0.1);color:#38bdf8;border:1px solid rgba(56,189,248,0.22);box-shadow:0 1px 6px rgba(56,189,248,0.12),inset 0 1px 0 rgba(56,189,248,0.08);pointer-events:none;cursor:default;}.nav-pill-btn.active .pill-icon{opacity:1;}.nav-pill-sep{width:1px;height:14px;background:rgba(255,255,255,0.06);margin:0 1px;flex-shrink:0;}@media (max-width:600px){.header-nav-pills{width:100%;justify-content:flex-start;gap:0.4rem;box-sizing:border-box;padding:0.45rem;}.nav-pill-btn{flex:0 1 auto;justify-content:center;padding:0.38rem 0.7rem;gap:0;}.nav-pill-btn .pill-label{display:none;}.nav-pill-btn .pill-icon{width:1.2rem;height:1.2rem;opacity:0.65;}.nav-pill-btn.active .pill-icon{opacity:1;}.nav-pill-sep{display:none;}}@media (min-width:601px) and (max-width:860px){.nav-pill-btn{padding:0.28rem 0.55rem;font-size:0.68rem;gap:0.3rem;}}.sidebar-stat-row{display:flex;justify-content:space-between;align-items:center;font-size:0.78rem;padding:0.5rem 0.25rem;border-bottom:1px solid rgba(255,255,255,0.02);white-space:nowrap;}.sidebar-stat-label{color:#64748b;}.sidebar-stat-val{font-weight:600;color:#cbd5e1;}