:root{--sn-w: 280px;--sn-bg-top: #efe2c0;--sn-bg-btm: #e6d6ad;--sn-text: #1d140a;--sn-text-dim: #3a2a18;--sn-text-muted: #6b5536;--sn-gold: #a48330;--sn-gold-dim: #826625;--sn-gold-muted: #c9a85a;--sn-active: #6e1e22;--sn-border: rgba(29,20,10,.18);--sn-border-strong:rgba(29,20,10,.35);--sn-border-soft: rgba(29,20,10,.1)}.study-nav{width:var(--sn-w);height:calc(100vh - var(--header-h, 52px));background:linear-gradient(180deg,var(--sn-bg-top) 0%,var(--sn-bg-btm) 100%);border-right:1px solid var(--sn-border-strong);box-shadow:inset -1px 0 #fff5dc80,4px 0 18px -8px #4a12162e;position:fixed;top:var(--header-h, 52px);left:0;display:flex;flex-direction:column;z-index:100;overflow-y:auto;transform:translate(0);transition:transform .28s ease}body:not(.sidebar-open) .study-nav{transform:translate(-100%)}.study-main{margin-left:0;flex:1;max-width:100%;transition:margin-left .28s ease,max-width .28s ease}body.sidebar-open .study-main{margin-left:var(--sn-w);max-width:calc(100% - var(--sn-w))}.sidebar-logo,.study-nav .brand{padding:2rem 1.5rem 1.25rem;border-bottom:1px solid var(--sn-border)}.sidebar-logo .cross{font-size:22px;color:var(--sn-gold);margin-bottom:.5rem;display:block;letter-spacing:.1em}.sidebar-logo h1,.study-nav .brand .title{font-size:17px;font-weight:700;color:var(--sn-text);letter-spacing:.14em;text-transform:uppercase;line-height:1.2;margin:0}.sidebar-logo p,.study-nav .brand .sub{font-size:.75rem;color:var(--sn-text-muted);letter-spacing:.22em;margin-top:8px;text-transform:uppercase}.study-nav .brand .greek{font-style:italic;font-size:14px;letter-spacing:.08em;color:var(--sn-active);margin:0 0 6px}.sidebar-search,.study-nav .search-wrap{padding:.75rem 1rem;border-bottom:1px solid var(--sn-border-soft)}.sidebar-search input,.study-nav .search-wrap input{width:100%;background:#fffae8d9;border:1px solid var(--sn-border);border-radius:4px;padding:6px 10px;font-size:1rem;color:var(--sn-text);letter-spacing:.04em;outline:none;transition:border-color .2s}.sidebar-search input::placeholder,.study-nav .search-wrap input::placeholder{color:var(--sn-text-muted)}.sidebar-search input:focus,.study-nav .search-wrap input:focus{border-color:var(--sn-gold-dim)}.nav-section-label,.study-nav .nav-section{font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--sn-gold-dim);padding:1rem 1rem .4rem}.study-nav .nav-item,.study-nav a.navlink{display:flex;align-items:center;gap:8px;padding:9px 1.25rem;font-size:13.5px;letter-spacing:.08em;color:var(--sn-text-dim);cursor:pointer;transition:all .15s;border-left:3px solid transparent;text-decoration:none;position:relative}.study-nav a.navlink{align-items:baseline;padding:9px 26px 9px 22px;counter-increment:nav}.study-nav a.navlink:before{content:counter(nav,upper-roman) ".";font-size:.7rem;color:var(--sn-gold-dim);letter-spacing:.04em;min-width:26px;flex-shrink:0}.study-nav ol{list-style:none;margin:0;padding:0;counter-reset:nav}.study-nav li{margin:0}.study-nav .nav-item:hover,.study-nav a.navlink:hover{color:var(--sn-active);background:#fff5d266}.study-nav .nav-item.active,.study-nav a.navlink.active{color:var(--sn-active);border-left-color:var(--sn-active);background:linear-gradient(90deg,rgba(255,245,210,.7),transparent 90%);font-weight:500}.nav-item .nav-num{font-size:9px;color:var(--sn-gold-muted);min-width:16px;font-weight:600}.sidebar-footer{margin-top:auto;padding:1rem 1.25rem;border-top:1px solid var(--sn-border);font-size:10px;color:var(--sn-text-muted);letter-spacing:.15em;line-height:1.6;text-transform:uppercase}.study-section{display:none;animation:sn-fadeIn .3s ease}.study-section.active{display:block}.section{display:none}.section.is-active{display:block}@keyframes sn-fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}#back-to-top{position:fixed;bottom:2rem;right:2rem;width:38px;height:38px;border-radius:50%;background:var(--sn-gold);color:var(--sn-text);text-align:center;line-height:38px;font-size:16px;text-decoration:none;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s,transform .2s;box-shadow:0 2px 8px #4a121640;z-index:300}#back-to-top.visible{opacity:1;visibility:visible}#back-to-top:hover{transform:translateY(-2px)}.study-nav::-webkit-scrollbar{width:4px}.study-nav::-webkit-scrollbar-track{background:var(--sn-bg-btm)}.study-nav::-webkit-scrollbar-thumb{background:var(--sn-gold-muted);border-radius:3px}@media(max-width:1000px){body.sidebar-open .study-main{margin-left:0;max-width:100%}body.sidebar-open .study-nav{z-index:500}}