/* Frosted frames, quiet depth, and a clear reading surface. */
:root{--reading-glass:rgba(255,255,255,.83);--menu-glass:rgba(255,255,255,.97);--reading-edge:#b8c5d4;--reading-glow:#c6ab7230;--reading-shadow:0 8px 24px #21354d0c,0 1px 0 #fff inset}
html[data-theme=dark]{--reading-glass:rgba(26,37,51,.88);--menu-glass:rgba(26,37,51,.97);--reading-edge:#50627a;--reading-glow:#d6ba7222;--reading-shadow:0 12px 30px #0002,0 1px 0 #ffffff12 inset}
.article-library{position:relative;border:1px solid var(--reading-edge);border-radius:24px;padding:28px;margin-bottom:64px;background:radial-gradient(ellipse at 5% 5%,var(--reading-glow),transparent 42%),radial-gradient(ellipse at 100% 80%,#809bcf14,transparent 55%),var(--surface-soft);isolation:isolate}
.article-library .library-tools{margin-top:0;justify-content:space-between}.article-library .field-search{max-width:none}.article-library .library-count{font-size:14px!important;letter-spacing:0;margin:24px 0 18px;color:var(--muted)}
.article-grid{gap:22px;align-items:stretch}.article-card{position:relative;padding:24px;min-height:300px;border:1px solid var(--reading-edge);border-radius:18px;background:linear-gradient(135deg,#ffffff14,transparent 48%),var(--reading-glass);box-shadow:var(--reading-shadow);backdrop-filter:blur(16px) saturate(125%);-webkit-backdrop-filter:blur(16px) saturate(125%);transform-style:preserve-3d;overflow-wrap:break-word;transition:transform .22s,border-color .22s,box-shadow .22s}
.article-card::before{content:'';pointer-events:none;position:absolute;inset:0;border-radius:inherit;border-top:1px solid #ffffff5c;background:radial-gradient(circle at var(--shine-x,50%) var(--shine-y,0%),#ffffff19,transparent 55%)}
.article-card h2{font-size:23px;line-height:1.35;margin:18px 0 14px}.article-card p{max-width:none;margin-bottom:20px}.article-card .guide-foot{padding-top:18px;margin-top:auto;border-top:1px solid var(--line);font-size:14px!important;letter-spacing:0;gap:12px;flex-wrap:wrap}.article-card-top{display:flex;justify-content:space-between;gap:12px;align-items:center}.article-card-top .card-category{font-size:13px!important;color:var(--muted)}.read-badge{display:inline-flex;align-items:center;gap:5px;font-size:13px;font-weight:500;color:var(--gold-deep)}.read-badge svg{width:15px;height:15px}.read-badge[hidden]{display:none}.summary-shortcut{font-size:14px;color:var(--gold-deep);text-decoration:underline;text-underline-offset:4px}.summary-shortcut:focus-visible{outline-offset:5px}.article-card .save-button{margin-left:auto;min-height:44px;min-width:44px}.article-library .catalog-bottom{margin-top:28px;padding-top:22px;border-top:1px solid var(--line);font-size:14px!important;letter-spacing:0;gap:18px}.article-library .field-search{flex:1;min-width:min(100%,280px)}
.article-library .filters{gap:8px}.article-library .filter-button{background:var(--reading-glass);border:1px solid var(--reading-edge);color:var(--muted);border-radius:10px;min-height:44px;font-size:14px!important;box-shadow:0 2px 0 #21354d0a}.article-library .filter-button[aria-pressed=true]{background:var(--surface);border-color:var(--gold-deep);color:var(--gold-deep);box-shadow:0 0 0 1px var(--gold-deep) inset,0 4px 12px var(--reading-glow)}
.article-reading{min-width:0}.article-summary{position:relative;margin-bottom:36px;padding:28px;border:1px solid var(--reading-edge);border-radius:18px;background:linear-gradient(135deg,var(--reading-glow),transparent 65%),var(--reading-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:var(--reading-shadow);scroll-margin-top:110px}.summary-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:20px;border-bottom:1px solid var(--line)}.summary-head h2{font-size:24px;margin:0;color:var(--ink)}.summary-time{display:flex;align-items:center;gap:6px;white-space:nowrap;color:var(--gold-deep);font-size:14px}.summary-time svg{width:18px;height:18px}.summary-lead{font-size:17px;line-height:1.75;color:var(--ink);margin:20px 0 16px}.summary-points{list-style:none;padding:0;margin:0;display:grid;gap:14px;counter-reset:point}.summary-points li{counter-increment:point;display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;font-size:16px;line-height:1.7;color:var(--ink)}.summary-points li::before{content:counter(point,decimal-leading-zero);font:500 13px/28px var(--ui);text-align:center;color:var(--gold-deep);background:var(--surface);border:1px solid var(--line);border-radius:7px;height:28px}.summary-takeaway{font-size:16px;line-height:1.75;margin:20px 0 0;padding-top:18px;border-top:1px solid var(--line);color:var(--ink)}.summary-takeaway strong{color:var(--gold-deep);font-weight:600}.summary-head>a{font-size:14px}.summary-full-link{margin-top:20px;display:inline-block;font-size:14px;font-weight:500;text-decoration:underline;text-underline-offset:4px;color:var(--gold-deep)}.article-reading .prose{border:1px solid var(--line);border-radius:18px;padding:32px;background:var(--paper);scroll-margin-top:110px}.article-summary,.article-reading .prose{overflow-wrap:break-word}.article-toc-summary{display:block;color:var(--gold-deep);font-size:14px;margin-bottom:18px}.article-aside{padding-right:10px}.article-top{border-bottom-color:var(--reading-edge)}
.reading-completion{position:relative;display:flex;align-items:center;gap:24px;max-width:1120px;margin:0 auto 32px;border:1px solid var(--reading-edge);border-radius:18px;padding:28px;background:linear-gradient(120deg,var(--reading-glow),transparent 60%),var(--reading-glass);box-shadow:var(--reading-shadow);overflow:hidden}.completion-copy{flex:1;min-width:0}.completion-copy h2{font-size:24px;margin:0 0 8px}.completion-copy p{font-size:16px;line-height:1.7;margin:0;color:var(--muted)}.completion-mark{flex:none;display:grid;place-items:center;width:52px;height:52px;border:1px solid var(--reading-edge);border-radius:16px;background:var(--surface);color:var(--gold-deep);box-shadow:0 4px 0 #21354d0d}.completion-mark svg{width:25px;height:25px}.completion-actions{display:flex;flex-direction:column;align-items:flex-start;gap:10px;flex:none}.reading-completion .button{min-height:46px;white-space:normal}.completion-undo{font-size:14px;color:var(--muted);text-decoration:underline;text-underline-offset:3px;min-height:36px}.completion-undo[hidden]{display:none}.completion-burst{position:absolute;inset:0;pointer-events:none;overflow:hidden}.completion-burst i{position:absolute;left:var(--x);top:50%;width:6px;height:10px;border-radius:2px;background:var(--gold);opacity:0;animation:reading-spark 1.2s var(--delay) ease-out both}.completion-burst i:nth-child(3n){background:#7992b4;width:5px;height:5px}.completion-burst i:nth-child(4n){background:var(--gold-deep)}.reading-completion.is-celebrating .completion-mark{animation:reading-check .6s ease-out}.reading-end{max-width:1120px;margin:auto;border-top:0;padding-top:0}.reading-end .article-save{flex:none}
.tools-dropdown{left:auto;right:-190px;top:calc(100% + 8px);width:min(670px,calc(100vw - 40px));border:1px solid var(--reading-edge)!important;border-radius:18px;padding:20px;background:var(--menu-glass)!important;backdrop-filter:blur(24px) saturate(140%);-webkit-backdrop-filter:blur(24px) saturate(140%);box-shadow:0 24px 65px #0d1e3330,0 1px 0 #ffffff38 inset;transform-origin:75% 0;max-height:min(660px,calc(100svh - 125px));overflow:auto}
.dropdown-heading{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:0 4px 16px;border-bottom:1px solid var(--line)}.dropdown-heading p{font-size:16px;color:var(--ink);font-weight:600}.tools-dropdown .dropdown-heading a{border:0;padding:8px 10px;font-size:14px;white-space:nowrap;color:var(--gold-deep)}.dropdown-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px;padding-top:16px}.dropdown-group h2{font-size:13px;letter-spacing:.07em!important;text-transform:uppercase;color:var(--muted);padding:0 10px;margin:0 0 8px}.tools-dropdown .dropdown-item{border:1px solid transparent!important;border-radius:11px;padding:12px 10px;display:grid;grid-template-columns:32px minmax(0,1fr);gap:10px;align-items:start;color:var(--ink);min-height:68px}.dropdown-item .dropdown-icon{display:grid;place-items:center;width:32px;height:32px;border:1px solid var(--line);border-radius:9px;background:var(--surface);box-shadow:0 2px 0 #21354d12}.dropdown-item svg{width:17px;height:17px;color:var(--gold-deep)}.dropdown-item strong{display:block;font-size:14px;font-weight:600;line-height:1.4}.dropdown-item small{display:block;color:var(--muted);font-size:13px;line-height:1.5;margin-top:4px}.tools-dropdown .dropdown-item:hover,.tools-dropdown .dropdown-item:focus-visible{background:var(--surface-soft);border-color:var(--reading-edge)!important;color:var(--ink)}.nav-tools summary>span{display:inline-block;transition:transform .2s;line-height:1}.nav-tools[open] summary>span{transform:rotate(180deg)}.nav-tools[open] .tools-dropdown{animation:dropdown-arrive .24s cubic-bezier(.2,.7,.25,1) both}
.sort-picker{position:relative;min-width:190px;flex:none}.sort-picker>summary{display:flex;align-items:center;justify-content:space-between;gap:18px;list-style:none;cursor:pointer;border:1px solid var(--reading-edge);border-radius:10px;padding:11px 14px;min-height:48px;background:var(--reading-glass);font-size:14px;color:var(--ink)}.sort-picker summary::-webkit-details-marker{display:none}.sort-picker summary>span:last-child{display:inline-block;transition:transform .2s}.sort-picker[open] summary>span:last-child{transform:rotate(180deg)}.sort-label{display:block;font-size:12px;color:var(--muted);line-height:1.4}.sort-options{position:absolute;z-index:10;top:calc(100% + 8px);right:0;min-width:220px;border:1px solid var(--reading-edge);border-radius:13px;background:var(--reading-glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);padding:6px;box-shadow:0 16px 35px #10233524;transform-origin:100% 0}.sort-picker[open] .sort-options{animation:dropdown-arrive .2s ease-out both}.sort-options button{display:flex;align-items:center;justify-content:space-between;gap:15px;text-align:left;width:100%;padding:11px 12px;border-radius:8px;min-height:46px;font-size:14px;color:var(--ink)}.sort-options button:hover,.sort-options button:focus-visible{background:var(--surface-soft)}.sort-options button[aria-pressed=true]{color:var(--gold-deep);background:var(--surface-soft)}.sort-options svg{width:17px;height:17px;opacity:0}.sort-options button[aria-pressed=true] svg{opacity:1}
@keyframes dropdown-arrive{from{opacity:0;transform:translateY(-8px) scale(.975)}to{opacity:1;transform:translateY(0) scale(1)}}
@keyframes reading-spark{0%{opacity:0;transform:translate(0,20px) rotate(0)}15%{opacity:1}100%{opacity:0;transform:translate(var(--drift),-110px) rotate(var(--spin))}}
@keyframes reading-check{0%{transform:scale(.8) rotate(-8deg)}60%{transform:scale(1.08) rotate(2deg)}100%{transform:scale(1) rotate(0)}}
@media(hover:hover) and (pointer:fine) and (prefers-reduced-motion:no-preference){.article-card.tilt-card{transform:perspective(1000px) translateY(var(--lift,0px)) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg))}.article-card.tilt-card:hover{--lift:-4px;box-shadow:0 18px 40px #142c4724,0 1px 0 #fff3 inset;border-color:var(--gold-deep)}.article-card h2{transform:translateZ(12px)}.article-card .card-category{transform:translateZ(8px)}.article-library .filter-button:hover{transform:perspective(600px) translateY(-2px) rotateX(5deg)}}
@media(max-width:1050px){.tools-dropdown{position:static!important;top:auto;width:100%!important;right:auto;max-height:none;margin:8px 0 16px;padding:18px!important}.site-header nav.open{animation:dropdown-arrive .22s ease-out}.site-header nav.open>a,.nav-tools summary{border-bottom-color:var(--line)}.reading-completion{flex-wrap:wrap}.completion-actions{flex-direction:row;align-items:center;flex-basis:100%;padding-left:76px}.article-reading .prose{padding:28px}.article-library{padding:24px}.article-grid{gap:20px}}
@media(max-width:700px){.article-library{padding:18px;border-radius:18px;margin-bottom:42px}.article-card{padding:22px;border-radius:14px;min-height:0}.article-grid{gap:18px}.article-card h2{font-size:23px;margin:16px 0 12px;max-width:none}.article-card .guide-foot{margin-top:0;gap:14px}.article-library .library-tools{gap:14px;margin-bottom:20px}.article-library .field-search{min-width:100%}.sort-picker{width:100%}.sort-options{width:100%;min-width:0}.article-library .catalog-bottom{display:block}.catalog-bottom>a{display:inline-block;margin-top:10px}.article-summary{padding:22px;margin-bottom:26px;border-radius:14px}.summary-head{gap:10px;align-items:flex-start;flex-wrap:wrap;padding-bottom:16px}.summary-head h2{font-size:23px}.summary-time{font-size:14px}.summary-lead{font-size:16px}.summary-points li{gap:10px;grid-template-columns:26px minmax(0,1fr)}.summary-points li::before{width:26px;height:26px;line-height:26px}.article-reading .prose{padding:22px;border-radius:14px}.article-reading .prose h2{font-size:25px}.article-reading .prose h3{font-size:22px}.reading-completion{padding:22px;gap:16px;border-radius:14px}.completion-mark{width:44px;height:44px;border-radius:12px}.completion-copy h2{font-size:22px}.completion-copy{flex-basis:calc(100% - 60px)}.completion-actions{padding-left:0;flex-direction:column;align-items:stretch;width:100%;gap:8px}.completion-undo{text-align:center}.dropdown-columns{grid-template-columns:1fr;gap:18px}.dropdown-heading{gap:10px}.tools-dropdown{border-radius:14px;padding:16px!important}.dropdown-item strong{font-size:15px}.dropdown-item small{font-size:14px}.tools-dropdown .dropdown-item{padding:12px;min-height:74px}.article-aside .toc-links{max-height:210px;overflow:auto}.article-summary,.article-reading .prose{scroll-margin-top:90px}}
@media(prefers-reduced-motion:reduce){.article-card.tilt-card,.article-card h2,.article-card .card-category{transform:none!important}.completion-burst{display:none}.nav-tools[open] .tools-dropdown,.sort-picker[open] .sort-options,.reading-completion.is-celebrating .completion-mark{animation:none}}
@media print{.article-summary,.article-reading .prose{border:0;padding:0;background:none;box-shadow:none;backdrop-filter:none}.reading-completion,.summary-full-link{display:none!important}.article-summary{break-inside:avoid}.article-library{border:0;background:none}}

.article-card:focus-within{border-color:var(--gold-deep)}.article-library .field-search{border-color:var(--reading-edge)}.article-library .field-search input::placeholder{color:var(--muted);opacity:1}.article-library .field-search input{background:transparent!important}