.collapsible-section{width:100%}.collapsible-trigger{width:100%;padding:clamp(20px,3vw,32px) 0;display:flex;align-items:center;justify-content:space-between;gap:clamp(12px,2vw,16px);border-bottom:1px solid var(--border);background:none;cursor:pointer;position:relative}.collapsible-trigger:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:1px;background-color:var(--border);opacity:1;transition:opacity .3s ease-in-out}.collapsible-trigger[data-state=open]:after{opacity:0}.collapsible-content{padding:clamp(20px,3vw,32px) 0;border-bottom:1px solid var(--border)}.collapsible-title{font-size:var(--font-size-h3);font-weight:300;font-family:var(--font-sans);color:var(--text-primary);gap:clamp(12px,2vw,16px);flex:1}.collapsible-title,.collapsible-title .icon,.toggle-icon{display:flex;align-items:center}.toggle-icon{color:var(--text-primary);justify-content:center;width:clamp(20px,3vw,24px);height:clamp(20px,3vw,24px)}.chevron-icon{transition:transform .3s ease}.chevron-icon.chevron-open{transform:rotate(180deg)}:root.dark .collapsible-title{color:var(--text-primary)}:root.dark .toggle-icon{color:var(--text-tertiary)}