@media (max-width:768px){.mobile-touch-friendly{min-height:44px;min-width:44px}.mobile-button-spacing{gap:.5rem}.mobile-tap-target{padding:.75rem}.mobile-form-spacing{gap:1rem}.mobile-card-compact{padding:1rem}.mobile-card-content{padding:.75rem}.mobile-nav-item{padding:.75rem 1rem;font-size:.875rem}.mobile-scroll-container{-webkit-overflow-scrolling:touch;overflow-x:hidden}.mobile-dropdown{bottom:0;left:0;right:0;top:auto;transform:none;border-radius:1rem 1rem 0 0;max-height:50vh;overflow-y:auto}.mobile-text-sm{font-size:.8rem;line-height:1.2rem}.mobile-text-xs{font-size:.7rem;line-height:1rem}.mobile-grid-responsive{grid-template-columns:1fr}@media (min-width:480px){.mobile-grid-responsive{grid-template-columns:repeat(2,1fr)}}.mobile-search-compact{font-size:.875rem;padding:.5rem .75rem .5rem 2.5rem}.mobile-sidebar-overlay{position:fixed;inset:0;background-color:rgba(0,0,0,.5);backdrop-filter:blur(4px);z-index:50}.mobile-header-compact{padding:.75rem 1rem}.mobile-header-enhanced{padding:.625rem .75rem;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,.1)}.mobile-header-button{padding:.625rem;border-radius:.75rem;transition:all .2s cubic-bezier(.4,0,.2,1);touch-action:manipulation}.mobile-header-button:active{transform:scale(.95)}.mobile-brand-logo{width:2.25rem;height:2.25rem;border-radius:.75rem;box-shadow:0 4px 12px rgba(0,0,0,.15)}.mobile-user-avatar{width:2rem;height:2rem;border-radius:.75rem;box-shadow:0 2px 8px rgba(0,0,0,.1)}.mobile-modal-fullscreen{margin:0;height:100vh;max-height:100vh;border-radius:0}.mobile-modal-bottom{position:fixed;bottom:0;left:0;right:0;top:auto;transform:translateY(0);border-radius:1rem 1rem 0 0;max-height:90vh;overflow-y:auto}}@media (min-width:768px) and (max-width:1023px){.tablet-sidebar-width{width:18rem}.tablet-card-grid{grid-template-columns:repeat(2,1fr)}.tablet-touch-friendly{min-height:48px;min-width:48px}.tablet-nav-item{padding:1rem;font-size:.9rem}.tablet-sidebar-overlay{position:fixed;inset:0;background-color:rgba(0,0,0,.3);backdrop-filter:blur(8px);z-index:50}.tablet-modal{max-width:80vw;max-height:80vh}.tablet-grid-spacing{gap:1.5rem}.tablet-text-base{font-size:.95rem;line-height:1.4rem}.tablet-form-spacing{gap:1.25rem}.tablet-sidebar-smooth-transition{transition:width .3s cubic-bezier(.4,0,.2,1),margin .3s cubic-bezier(.4,0,.2,1)}.tablet-content-smooth{transition:margin-left .3s cubic-bezier(.4,0,.2,1)}.tablet-collapsed-spacing{padding-left:1.5rem;padding-right:1.5rem}}@media (pointer:coarse){.touch-optimized{min-height:44px;min-width:44px}.touch-spacing{margin:.25rem}.touch-hover:active{transform:scale(.98);transition:transform .1s ease}}@supports (-webkit-touch-callout:none){.ios-scroll-fix{-webkit-overflow-scrolling:touch}.ios-safe-area-padding{padding-bottom:env(safe-area-inset-bottom);padding-top:env(safe-area-inset-top)}.ios-input-fix{font-size:16px}}@media (max-width:768px){.mobile-step-progress{padding:.75rem 1rem;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.mobile-step-indicator{min-width:2rem;min-height:2rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:600;transition:all .3s ease}.mobile-step-progress-bar{height:.25rem;border-radius:.125rem;transition:background-color .3s ease}.mobile-form-section{padding:1rem;border-radius:1rem;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);margin-bottom:1rem}.mobile-participant-card{padding:.75rem;border-radius:.75rem;border:2px solid transparent;transition:all .2s ease;touch-action:manipulation}.mobile-participant-card:active{transform:scale(.98)}.mobile-participant-selected{border-color:#3b82f6;background-color:rgba(59,130,246,.1)}.mobile-checkbox{width:1.25rem;height:1.25rem;border-radius:50%;border:2px solid #d1d5db;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.mobile-checkbox-checked{border-color:#3b82f6;background-color:#3b82f6}.mobile-amount-input{font-size:1rem;padding:.75rem;border-radius:.5rem;border:1px solid rgba(209,213,219,.5);background-color:rgba(255,255,255,.5);transition:all .2s ease}.mobile-amount-input:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.1)}.mobile-currency-symbol{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:#6b7280;font-size:.875rem;pointer-events:none}.mobile-split-type-card{padding:.75rem;border-radius:.75rem;border:2px solid transparent;text-align:center;cursor:pointer;transition:all .2s ease;touch-action:manipulation}.mobile-split-type-card:active{transform:scale(.95)}.mobile-split-type-selected{border-color:#3b82f6;background-color:rgba(59,130,246,.1)}.mobile-bottom-navigation{background:rgba(255,255,255,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid rgba(255,255,255,.2);padding:1rem 1rem calc(1rem + env(safe-area-inset-bottom))}.mobile-review-item{display:flex;justify-content:space-between;align-items:center;padding:.5rem 0;border-bottom:1px solid rgba(229,231,235,.5)}.mobile-review-item:last-child{border-bottom:none}.mobile-error-alert{padding:.75rem;border-radius:.5rem;background-color:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);margin-bottom:1rem}.mobile-success-alert{padding:.75rem;border-radius:.5rem;background-color:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.2);margin-bottom:1rem}}