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1rem;padding-bottom:max(.4rem,env(safe-area-inset-bottom));text-align:center;position:fixed;bottom:0;left:0;right:0;z-index:101}.tagline{font-size:.65rem;color:var(--text-secondary);letter-spacing:.5px;opacity:.7}.app-content{flex:1;overflow-y:auto;overflow-x:hidden;padding-bottom:140px;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;touch-action:pan-y;will-change:scroll-position;transform:translateZ(0)}.content-wrapper{animation:contentEnter .3s cubic-bezier(.16,1,.3,1) forwards;will-change:transform,opacity}.app-content.transitioning .content-wrapper{animation:contentExit .15s ease-out forwards}@keyframes contentEnter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes contentExit{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-5px)}}.bottom-nav{position:fixed;bottom:24px;left:0;right:0;background:var(--bg-secondary);display:flex;justify-content:space-around;padding:.5rem 0;border-top:1px solid var(--border-color);z-index:100}.nav-btn{flex:1;display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.5rem;background:none;border:none;color:var(--text-secondary);cursor:pointer;transition:all .3s cubic-bezier(.16,1,.3,1);position:relative}.nav-btn:after{content:"";position:absolute;top:0;left:50%;transform:translate(-50%) scaleX(0);width:40px;height:3px;background:var(--accent-color);border-radius:0 0 3px 3px;transition:transform .3s cubic-bezier(.16,1,.3,1)}.nav-btn:active{transform:scale(.95)}.nav-btn.active{color:var(--accent-color)}.nav-btn.active .nav-icon{transform:scale(1.1)}.nav-btn.active:after{transform:translate(-50%) scaleX(1)}.nav-icon{font-size:1.5rem;transition:transform .3s cubic-bezier(.16,1,.3,1)}.nav-label{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.section-title{display:flex;align-items:center;gap:.5rem;font-size:1.5rem;margin-bottom:1.5rem;color:var(--text-primary)}.title-icon{font-size:1.8rem}.sub-nav{display:flex;gap:.4rem;padding:.75rem 1rem;background:var(--bg-secondary);overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border-color)}.sub-nav::-webkit-scrollbar{display:none}.sub-nav-btn{display:flex;align-items:center;gap:.3rem;padding:.5rem .65rem;background:var(--card-bg);border:1px solid var(--border-color);border-radius:20px;color:var(--text-secondary);font-size:.8rem;font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap;flex-shrink:0}.sub-nav-btn:hover{background:#e945601a;border-color:var(--accent-color);color:var(--accent-color)}.sub-nav-btn.active{background:var(--accent-color);border-color:var(--accent-color);color:#fff}.sub-nav-icon{font-size:.9rem}.sub-nav-label{font-size:.75rem}.sub-content{animation:contentEnter .3s ease forwards}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--accent-secondary);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--accent-color)}@media(max-width:360px){.sub-nav-btn{padding:.5rem .6rem;gap:.25rem}.sub-nav-icon{font-size:.8rem}.sub-nav-label{font-size:.7rem}}@media(min-width:768px){.app-content{max-width:600px;margin:0 auto}.bottom-nav{max-width:600px;left:50%;transform:translate(-50%);border-radius:16px 16px 0 0}}@media(min-width:1024px){.app-content,.bottom-nav{max-width:800px}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.goal-card:hover,.calorie-stats-card:hover,.muscle-balance-card:hover,.muscle-detail-card:hover{transform:translateY(-2px);box-shadow:0 8px 25px #0000004d}button:active:not(:disabled){transform:scale(.97)}input:focus,select:focus,button:focus{transition:border-color .2s,box-shadow .2s}.skeleton{background:linear-gradient(90deg,#ffffff0d 25%,#ffffff1a,#ffffff0d 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:8px}.glass-effect{background:#ffffff0d;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.gradient-text{background:linear-gradient(135deg,var(--accent-color),#10b981);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}