:root{--word: #2b579a;--excel: #217346;--powerpoint: #d24726;--outlook: #0072c6;--onenote: #7719aa;--access: #a4373a;--publisher: #077568;--brand: #2b579a;--hero: #1f3c6e;--cta: #d24726;--ink: #1a1a1a;--ink-soft: #605e5c;--line: #e1dfdd;--panel: #f3f2f1;--panel-2: #faf9f8;--bg: #ffffff;--accent: var(--brand);--maxw: 1120px;--readw: 720px;--f-ui: "Segoe UI", "Segoe UI Web (West European)", system-ui, -apple-system, "Helvetica Neue", Roboto, Arial, sans-serif;--step--1: clamp(.83rem, .8rem + .15vw, .9rem);--step-0: clamp(1rem, .96rem + .2vw, 1.08rem);--step-1: clamp(1.2rem, 1.1rem + .5vw, 1.4rem);--step-2: clamp(1.5rem, 1.3rem + 1vw, 1.95rem);--step-3: clamp(1.95rem, 1.5rem + 2.2vw, 3rem);--step-4: clamp(2.6rem, 1.9rem + 3.6vw, 4.4rem)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}body{margin:0;font-family:var(--f-ui);font-size:var(--step-0);line-height:1.62;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img{max-width:100%;height:auto;display:block}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.visually-hidden-skip{position:absolute;left:8px;top:-48px;z-index:100;background:var(--brand);color:#fff;padding:10px 16px;font-weight:600;transition:top .15s ease}.visually-hidden-skip:focus{top:8px;text-decoration:none}.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:20px}.rainbow{height:4px;display:flex}.rainbow>i{flex:1}.rainbow .w{background:var(--word)}.rainbow .e{background:var(--excel)}.rainbow .p{background:var(--powerpoint)}.rainbow .o{background:var(--outlook)}.site-header{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:64px}.brand{display:flex;align-items:center;gap:12px;font-weight:600;color:var(--ink);letter-spacing:-.01em}.brand:hover{text-decoration:none}.brand .mark{width:34px;height:34px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:19px;flex:none}.brand b{font-weight:600;font-size:1.05rem;line-height:1}.brand span{display:block;font-size:.72rem;color:var(--ink-soft);font-weight:400;margin-top:2px}.site-nav{margin-left:auto;display:flex;gap:4px;align-items:center;flex-wrap:wrap}.site-nav a{color:var(--ink);font-weight:600;font-size:.94rem;padding:8px 12px;border-bottom:3px solid transparent}.site-nav a:hover{text-decoration:none;border-bottom-color:var(--accent);background:var(--panel-2)}.site-nav a[data-app=word]:hover{border-bottom-color:var(--word)}.site-nav a[data-app=excel]:hover{border-bottom-color:var(--excel)}.site-nav a[data-app=powerpoint]:hover{border-bottom-color:var(--powerpoint)}.hero{background:var(--hero);color:#fff}.hero .wrap{padding-block:56px 64px}.hero h1{font-weight:300;font-size:var(--step-4);line-height:1.04;letter-spacing:-.02em;margin:0 0 14px}.hero h1 b{font-weight:600}.hero p{font-size:var(--step-1);font-weight:300;max-width:620px;margin:0 0 28px;color:#eaf0fb}.hero .cta{display:inline-flex;align-items:center;gap:10px;background:var(--cta);color:#fff;font-weight:600;font-size:1.05rem;padding:14px 26px;border:0}.hero .cta:hover{text-decoration:none;filter:brightness(1.07)}.hero .cta:after{content:"↓";font-size:1.1em}.app-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;margin-top:40px}.app-tiles a{color:#fff;padding:22px 20px;display:flex;flex-direction:column;gap:4px;min-height:116px;position:relative;isolation:isolate}.app-tiles a:hover{text-decoration:none}.app-tiles a:after{content:"";position:absolute;inset:0;background:#0000;z-index:-1;transition:transform .18s ease;transform-origin:bottom}.app-tiles a:hover:after{transform:scaleY(1.05)}.app-tiles .glyph{font-size:1.7rem;font-weight:700;line-height:1}.app-tiles .name{font-weight:600;font-size:1.15rem;margin-top:auto}.app-tiles .sub{font-size:.82rem;opacity:.85}.tile-word{background:var(--word)}.tile-excel{background:var(--excel)}.tile-powerpoint{background:var(--powerpoint)}.section{padding-block:56px}.section.alt{background:var(--panel-2);border-block:1px solid var(--line)}.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 10px}.section h2.section-title{font-weight:300;font-size:var(--step-3);letter-spacing:-.02em;margin:0 0 8px;line-height:1.1}.section .lead{color:var(--ink-soft);max-width:640px;margin:0 0 32px;font-size:var(--step-1);font-weight:300}.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}.post-card{background:var(--bg);padding:20px 22px;display:flex;flex-direction:column;gap:8px;border-left:4px solid var(--accent);transition:background .15s ease}.post-card:hover{background:var(--panel-2)}.post-card[data-app=word]{border-left-color:var(--word)}.post-card[data-app=excel]{border-left-color:var(--excel)}.post-card[data-app=powerpoint]{border-left-color:var(--powerpoint)}.post-card[data-app=outlook]{border-left-color:var(--outlook)}.post-card[data-app=onenote]{border-left-color:var(--onenote)}.post-card[data-app=access]{border-left-color:var(--access)}.post-card[data-app=publisher]{border-left-color:var(--publisher)}.post-card a{color:var(--ink);font-weight:600;font-size:1.05rem;line-height:1.3}.post-card a:after{content:"";position:absolute;inset:0}.post-card{position:relative}.post-card p{margin:0;color:var(--ink-soft);font-size:.9rem;line-height:1.5}.post-card .tag{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent)}.article{padding-block:40px 64px}.article-head{border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:32px}.breadcrumb{font-size:.82rem;color:var(--ink-soft);margin-bottom:16px}.breadcrumb a{color:var(--ink-soft)}.article h1{font-weight:300;font-size:var(--step-3);line-height:1.08;letter-spacing:-.02em;margin:0;border-left:5px solid var(--accent);padding-left:18px}.article-meta{font-size:.85rem;color:var(--ink-soft);margin-top:14px;padding-left:23px}.prose{max-width:var(--readw)}.prose>*+*{margin-top:1.05em}.prose p,.prose ul,.prose ol,.prose table{font-size:var(--step-0)}.prose h2{font-weight:600;font-size:var(--step-2);line-height:1.2;letter-spacing:-.01em;margin-top:2em;padding-left:14px;border-left:4px solid var(--accent)}.prose h3{font-weight:600;font-size:var(--step-1);margin-top:1.7em;color:#2c2c2c}.prose h4{font-weight:600;font-size:1.05rem;margin-top:1.4em}.prose a{color:var(--brand);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}.prose ul,.prose ol{padding-left:1.3em}.prose li{margin-top:.4em}.prose img{border:1px solid var(--line);margin-block:1.4em}.prose strong{font-weight:600}.prose blockquote{border-left:4px solid var(--accent);background:var(--panel-2);margin:1.5em 0;padding:12px 18px;color:#333}.prose table{width:100%;border-collapse:collapse;font-size:.94rem}.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}.prose thead th{background:var(--accent);color:#fff;font-weight:600}.prose tbody tr:nth-child(2n){background:var(--panel-2)}.prose figure{margin:1.4em 0}.prose figcaption{font-size:.82rem;color:var(--ink-soft);margin-top:6px}.site-footer{background:#20252b;color:#c9ccd1;margin-top:64px}.site-footer .wrap{padding-block:44px 28px}.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}.site-footer h3{color:#fff;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;font-weight:700;margin:0 0 14px}.site-footer a{color:#c9ccd1}.site-footer a:hover{color:#fff}.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}.site-footer .desc{color:#9aa0a8;font-size:.92rem;max-width:320px}.foot-bottom{border-top:1px solid #333a42;margin-top:32px;padding-top:20px;font-size:.82rem;color:#8b9198;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}@media(max-width:760px){.site-header .wrap{flex-wrap:wrap;min-height:0;padding-block:12px;gap:10px 16px}.site-nav{width:100%;margin-left:0}.app-tiles{grid-template-columns:1fr}.foot-grid{grid-template-columns:1fr;gap:24px}}