.learn-sms{--paper: #F7F4ED;--surface: #FFFFFF;--surface-2: #F1ECE1;--ink: #1B2A3A;--heading: #1E3A5F;--slate: #5E6B79;--dim: #94A0AC;--line: #E9E3D7;--line-strong: #D9D1C2;--steel: #1E3A5F;--signal: #D2603A;--signal-soft: #F7E7DC;--signal-line: #E3B49C;--panel: #1E3A5F;--panel-2: #16304C;--panel-line: #33547A;--panel-text: #E7EDF4;--panel-muted: #A9BAD0;--r: 12px;--maxw: 1080px;background:var(--paper);color:var(--ink);font-family:Lato,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}.dark .learn-sms{--paper: #0F1822;--surface: #18222E;--surface-2: #1E2A38;--ink: #E8EDF2;--heading: #EAF0F6;--slate: #A6B1BF;--dim: #7E8A98;--line: #28333F;--line-strong: #3A4654;--steel: #6FA0CF;--signal: #E78A4F;--signal-soft: #33271D;--signal-line: #6E4A30;--panel: #172636;--panel-2: #101D2B;--panel-line: #2E465F}.learn-sms a{color:var(--signal);text-decoration:none}.learn-sms a:hover{text-decoration:underline}.learn-sms .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}.learn-sms h1,.learn-sms h2,.learn-sms h3,.learn-sms h4{font-weight:900;line-height:1.15;margin:0;color:var(--heading)}.learn-sms{--app-header: 3.5rem;--subnav-h: 3rem}.learn-sms .subnav{position:sticky;top:var(--app-header);z-index:40;background:var(--paper);border-bottom:1px solid var(--line)}.learn-sms .subnav-inner{display:flex;align-items:stretch;gap:2px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.learn-sms .subnav-inner::-webkit-scrollbar{display:none}.learn-sms .subnav-link{flex:0 0 auto;white-space:nowrap;text-decoration:none;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--slate);padding:13px 14px;border-bottom:2px solid transparent;margin-bottom:-1px;transition:color .15s,border-color .15s}.learn-sms .subnav-link:hover{color:var(--signal);text-decoration:none}.learn-sms .subnav-link.is-active{color:var(--signal);border-bottom-color:var(--signal)}.learn-sms .subnav-link:focus-visible{outline:2px solid var(--signal);outline-offset:-2px}.learn-sms section.part{scroll-margin-top:calc(var(--app-header) + var(--subnav-h) + 12px)}.learn-sms .hero{padding:56px 0;border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--surface) 0%,var(--paper) 100%)}.learn-sms .eyebrow{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--signal);font-weight:900;margin-bottom:18px}.learn-sms .hero h1{font-size:clamp(32px,5vw,52px);max-width:16ch;letter-spacing:-.01em}.learn-sms .hero .lede{font-size:clamp(17px,2vw,20px);color:var(--slate);max-width:62ch;margin-top:20px;line-height:1.55}.learn-sms .hero-meta{display:flex;gap:28px;flex-wrap:wrap;margin-top:28px;font-size:12.5px;color:var(--dim);letter-spacing:.02em;font-weight:700}.learn-sms .hero-meta b{color:var(--slate)}.learn-sms .meter{position:relative;height:54px;border-radius:8px;margin:14px 0 6px;background:linear-gradient(90deg,var(--surface-2) 0%,var(--surface-2) 55%,var(--signal-soft) 78%,var(--signal) 100%);border:1px solid var(--line-strong)}.learn-sms .meter .ticks{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;justify-content:space-between;pointer-events:none}.learn-sms .meter .tick{width:1px;background:#7878782e}.learn-sms .meter-scale{display:flex;justify-content:space-between;font-size:11px;color:var(--dim);margin-top:6px;letter-spacing:.02em;font-weight:700}.learn-sms .thresh{position:absolute;top:-6px;bottom:-6px;width:2px;background:var(--ink);transition:left .45s cubic-bezier(.2,.7,.2,1)}.learn-sms .thresh:after{content:attr(data-label);position:absolute;top:-26px;left:50%;transform:translate(-50%);white-space:nowrap;font-size:11px;font-weight:900;color:var(--heading);background:var(--surface);border:1px solid var(--line-strong);border-radius:5px;padding:2px 7px}.learn-sms .thresh:before{content:"";position:absolute;top:-9px;left:50%;transform:translate(-50%);width:11px;height:11px;background:var(--signal);border:2px solid var(--surface);border-radius:2px;rotate:45deg;box-shadow:0 0 0 1px var(--signal-line)}.learn-sms .alertchip{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;color:var(--ink);background:var(--signal-soft);border:1px solid var(--signal-line);border-radius:20px;padding:4px 12px 4px 9px}.learn-sms .alertchip .sq{width:10px;height:10px;background:var(--signal);rotate:45deg;border-radius:2px}.learn-sms .caveat{margin-top:36px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--signal);border-radius:var(--r);padding:20px 24px;max-width:72ch}.learn-sms .caveat .lab{font-size:11.5px;text-transform:uppercase;letter-spacing:.1em;color:var(--signal);font-weight:900;margin-bottom:8px}.learn-sms .caveat p{margin:0;color:var(--slate);font-size:15px}.learn-sms section.part{padding:64px 0;border-bottom:1px solid var(--line)}.learn-sms .part-head{display:flex;align-items:baseline;gap:18px;margin-bottom:8px}.learn-sms .part-num{font-size:13px;font-weight:900;color:var(--signal);letter-spacing:.08em}.learn-sms .part-head h2{font-size:clamp(26px,3.4vw,36px)}.learn-sms .part-sub{color:var(--slate);max-width:66ch;margin:10px 0 36px;font-size:17px;line-height:1.55}.learn-sms h3.block{font-size:20px;margin:44px 0 14px}.learn-sms h3.block:first-of-type{margin-top:8px}.learn-sms h4.sub{font-size:15px;font-weight:900;color:var(--steel);margin:22px 0 8px}.learn-sms p.body{color:var(--ink);max-width:70ch;margin:0 0 14px}.learn-sms .small{font-size:13.5px;color:var(--slate)}.learn-sms .note{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--steel);border-radius:8px;padding:16px 18px;margin:8px 0 4px;max-width:74ch}.learn-sms .note p{margin:0 0 8px;font-size:14px;color:var(--ink)}.learn-sms .note p:last-child{margin-bottom:0}.learn-sms .note .nlab{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--steel);font-weight:900;margin-bottom:7px}.learn-sms .note.warn{border-left-color:var(--signal)}.learn-sms .note.warn .nlab{color:var(--signal)}.learn-sms .basics{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:8px}.learn-sms .bcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 18px 16px;display:flex;flex-direction:column;gap:8px}.learn-sms .bcard .top{display:flex;align-items:center;justify-content:space-between;gap:10px}.learn-sms .bcard h4{font-size:16px}.learn-sms .tag{font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;padding:3px 8px;border-radius:5px;white-space:nowrap;font-weight:700}.learn-sms .tag.pub{background:var(--surface-2);color:var(--slate);border:1px solid var(--line)}.learn-sms .tag.priv{background:var(--steel);color:#fff}.learn-sms .bcard .desc{font-size:14px;color:var(--slate);margin:0}.learn-sms .bcard .meta{font-size:11.5px;color:var(--dim);border-top:1px dashed var(--line);padding-top:10px;margin-top:auto;display:flex;flex-wrap:wrap;gap:4px 14px;font-weight:700}.learn-sms .bcard .meta b{color:var(--slate);font-weight:900}.learn-sms .spec{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface)}.learn-sms .spec .row{display:grid;grid-template-columns:200px 1fr;border-top:1px solid var(--line)}.learn-sms .spec .row:first-child{border-top:0}.learn-sms .spec .k{padding:16px 18px;background:var(--surface-2);font-size:13px;font-weight:900;color:var(--steel);border-right:1px solid var(--line)}.learn-sms .spec .v{padding:16px 18px;font-size:14.5px;color:var(--ink)}.learn-sms .spec .v b{font-weight:900}.learn-sms table.tbl{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14px;margin-top:6px}.learn-sms table.tbl th,.learn-sms table.tbl td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}.learn-sms table.tbl td.amt{font-weight:900;color:var(--heading);white-space:nowrap}.learn-sms table.tbl thead th{background:var(--surface-2);font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--slate);font-weight:900}.learn-sms table.tbl tbody tr:last-child td{border-bottom:0}.learn-sms table.tbl td.num{font-weight:900;color:var(--steel)}.learn-sms .tcap{font-size:12.5px;color:var(--dim);margin-top:8px;max-width:74ch}.learn-sms .states{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.learn-sms .state{font-size:12.5px;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:9px 12px;color:var(--slate)}.learn-sms .state b{color:var(--steel);font-weight:900}.learn-sms .acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--surface);margin-top:8px}.learn-sms .acc-item{border-top:1px solid var(--line);border-bottom:0}.learn-sms .acc-item:first-child{border-top:0}.learn-sms .acc-trigger{display:flex;align-items:center;gap:14px;width:100%;padding:16px 18px;cursor:pointer;box-sizing:border-box;font-weight:700}.learn-sms .acc-trigger:hover{text-decoration:none}.learn-sms .acc-trigger:focus-visible{outline:2px solid var(--signal);outline-offset:-2px}.learn-sms .acc-num{font-size:12px;color:var(--signal);font-weight:900;min-width:30px}.learn-sms .acc-t{font-weight:700;font-size:15.5px;flex:1;color:var(--ink);text-align:left}.learn-sms .acc-parts{font-size:11px;color:var(--dim);letter-spacing:.03em;font-weight:700}.learn-sms .acc-trigger>svg{color:var(--dim)}.learn-sms .acc-panel{padding:0 18px 18px 62px}.learn-sms .acc-panel p{margin:0 0 10px;font-size:14.5px;color:var(--ink)}.learn-sms .acc-panel ul{margin:0 0 6px;padding-left:18px;font-size:14px;color:var(--slate)}.learn-sms .acc-panel li{margin:4px 0}.learn-sms .acc-panel table.tbl{margin-top:0}.learn-sms 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var(--panel-line);background:var(--panel-2);display:inline-flex;align-items:center;justify-content:center;font-size:10px;font-weight:900;color:transparent}.learn-sms .xcell.on{color:#fff;font-weight:700}.learn-sms .xcell.on .xbox{background:var(--signal);border-color:var(--signal);color:#fff}.learn-sms table.ptbl{width:100%;border-collapse:collapse;font-size:12px;margin-top:6px;background:var(--panel-2);border:1px solid var(--panel-line);border-radius:8px;overflow:hidden}.learn-sms table.ptbl th,.learn-sms table.ptbl td{padding:7px 10px;text-align:right;border-bottom:1px solid rgba(255,255,255,.07);color:var(--panel-text)}.learn-sms table.ptbl th:first-child,.learn-sms table.ptbl td:first-child{text-align:left;color:var(--panel-muted)}.learn-sms table.ptbl thead th{background:#ffffff0d;font-size:10.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--signal-line);font-weight:900}.learn-sms table.ptbl tbody tr:last-child td{border-bottom:0}.learn-sms table.ptbl tr.nat td{color:var(--panel-muted);font-style:italic}.learn-sms .tcapp{font-size:11px;color:var(--panel-muted);font-style:italic;margin-top:6px;max-width:62ch}.learn-sms .related{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:8px}.learn-sms .rcard{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;text-decoration:none;color:inherit}.learn-sms .rcard:hover{border-color:var(--signal-line);text-decoration:none}.learn-sms .rcard .re{font-size:10.5px;text-transform:uppercase;letter-spacing:.08em;color:var(--signal);font-weight:900;margin-bottom:6px}.learn-sms .rcard h4{font-size:16px;margin-bottom:4px}.learn-sms .rcard p{margin:0;font-size:13px;color:var(--slate)}.learn-sms .rcard .go{margin-top:10px;font-size:12.5px;color:var(--signal);font-weight:900}.learn-sms .learn-index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:8px}.learn-sms .learn-card{display:flex;flex-direction:column;gap:10px;background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--signal);border-radius:var(--r);padding:22px 22px 18px;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s,border-color .15s}.learn-sms .learn-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 6px 20px #0000000f}.learn-sms .learn-card:focus-visible{outline:2px solid var(--signal);outline-offset:2px}.learn-sms .learn-card .lc-eyebrow{font-size:11.5px;font-weight:900;text-transform:uppercase;letter-spacing:.1em;color:var(--signal)}.learn-sms .learn-card h3{font-size:19px;color:var(--heading);margin:0}.learn-sms .learn-card p{font-size:14px;color:var(--slate);margin:0}.learn-sms .learn-card .lc-go{margin-top:auto;padding-top:4px;font-size:12.5px;font-weight:700;color:var(--signal)}@media (max-width: 900px){.learn-sms .learn-index-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 820px){.learn-sms .basics{grid-template-columns:1fr}}@media (max-width: 720px){.learn-sms .basics,.learn-sms .smc,.learn-sms .twocol{grid-template-columns:1fr}}@media (max-width: 680px){.learn-sms .levers{grid-template-columns:1fr}.learn-sms .gloss{-moz-columns:1;columns:1}.learn-sms .glance{grid-template-columns:1fr}}@media (max-width: 560px){.learn-sms .learn-index-grid{grid-template-columns:1fr}}@media (max-width: 620px){.learn-sms .rec .grid4,.learn-sms .xgrid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.learn-sms .spec .row{grid-template-columns:1fr}.learn-sms .spec .k{border-right:0;border-bottom:1px solid var(--line)}.learn-sms .acc-panel{padding-left:18px}}@media (prefers-reduced-motion: reduce){.learn-sms .thresh,.learn-sms .ch-thresh{transition:none}}