@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root{--ink:#141917;--muted:#66726e;--green:#045c45;--deep:#063d32;--sage:#dfe5e3;--line:#d9e1de;--soft:#f4f7f5;--lime:#e8f3bc;--pink:#f5d8df;--white:#fff}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:#e9ebea;color:var(--ink);font-family:Inter,Arial,sans-serif}button{font:inherit}button:focus-visible,a:focus-visible{outline:3px solid #4e9db8;outline-offset:3px}img{max-width:100%}
#stage{position:absolute;left:50%;top:50%;width:1600px;height:900px;transform-origin:center center;overflow:hidden;background:#fff;box-shadow:0 14px 70px #1e343326}
.slide{position:absolute;inset:0;padding:70px 108px 72px;background:#fff;opacity:0;pointer-events:none;transform:translateX(20px);transition:opacity .3s ease,transform .3s ease;overflow:hidden}
.slide.active{opacity:1;pointer-events:auto;transform:none;z-index:1}.slide.dark{background:#103f35;color:#fff}.slide.mist{background:#f7faf8}.slide.cover{padding-top:78px}
.brand{position:absolute;left:108px;top:48px;display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;letter-spacing:-.04em;z-index:3}.brand img{width:28px;height:28px;object-fit:contain}.brand span{color:inherit}.dark .brand{color:#fff}
.chapter{font-size:17px;color:var(--green);font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin:44px 0 24px}.dark .chapter{color:#c9ebb5}
h1,h2,h3,p{margin:0}h1{font-size:88px;line-height:1.05;letter-spacing:-.066em;font-weight:600}h2{font-size:60px;line-height:1.08;letter-spacing:-.055em;font-weight:600}h3{font-size:26px;line-height:1.18;letter-spacing:-.035em;font-weight:600}.lede{font-size:27px;line-height:1.42;color:var(--muted);max-width:1070px;letter-spacing:-.018em}.dark .lede{color:#dce8e2}.small{font-size:18px;line-height:1.45;color:var(--muted)}.dark .small{color:#c4d8cf}.green{color:var(--green)}.dark .green{color:#cbebb6}.slide-title{max-width:1350px;margin-top:10px}.slide-title.short{max-width:1000px}.note{font-size:18px;color:var(--muted);line-height:1.45}.dark .note{color:#c4d8cf}
.num{position:absolute;right:110px;bottom:52px;color:#77827f;font-size:17px;font-variant-numeric:tabular-nums}.dark .num{color:#c5dbd1}.eyebrow{font-size:16px;color:var(--green);font-weight:700;letter-spacing:.12em;text-transform:uppercase}.dark .eyebrow{color:#bde6ce}
.cover-title{position:absolute;left:108px;top:287px;max-width:720px;z-index:2}.cover-title h1{font-size:83px}.cover-title .lede{margin-top:28px;font-size:24px;max-width:610px}.cover-art{position:absolute;right:12px;bottom:90px;width:840px;height:690px;object-fit:contain;object-position:center right}.cover .footerline{position:absolute;left:108px;bottom:65px;color:#7b8781;font-size:17px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}.split.wide-left{grid-template-columns:1.08fr .92fr}.split.wide-right{grid-template-columns:.88fr 1.12fr}.body-area{margin-top:48px;height:490px}.stack{display:flex;flex-direction:column;gap:26px}.row{display:flex;gap:22px;align-items:center}.grow{flex:1}.mini-label{font-size:15px;text-transform:uppercase;letter-spacing:.1em;font-weight:700;color:var(--green)}.ghost-label{font-size:15px;text-transform:uppercase;letter-spacing:.12em;font-weight:700;color:#82918c}
.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.card.soft{background:var(--soft)}.card.green-tint{background:#eaf3ef;border-color:#bad6cb}.card.dark-card{background:#183f36;border-color:#35665b;color:#fff}.card p{margin-top:10px;font-size:22px;line-height:1.42;color:var(--muted)}.card.dark-card p{color:#d3e7dd}.card .tiny{font-size:16px;margin-top:8px}.card.clickable{cursor:pointer;transition:border-color .2s,transform .2s,box-shadow .2s}.card.clickable:hover,.card.clickable.selected{border-color:#248167;transform:translateY(-2px);box-shadow:0 12px 26px #254f4130}.card.selected{background:#edf6f1}.card b{font-weight:700}.card-num{font-size:15px;color:var(--green);font-weight:700;letter-spacing:.08em}
.tag{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:999px;padding:8px 14px;background:#fff;font-size:16px;font-weight:600;color:#33443d}.tag.green{background:#e5f2eb;color:var(--green);border-color:#bed9cb}.tag.lime{background:#f0f7d5;border-color:#d6e6a2;color:#344c31}.tag.warn{background:#fff1e3;border-color:#e5c5aa;color:#9b5b25}
.button{border:1px solid #bfcfcc;background:#fff;border-radius:11px;padding:13px 21px;color:var(--ink);font-size:18px;font-weight:600;cursor:pointer;transition:background .2s,transform .2s}.button:hover{background:#f1f6f3;transform:translateY(-1px)}.button.primary{background:var(--green);border-color:var(--green);color:#fff}.button.primary:hover{background:#0a6d52}.button.slim{padding:9px 15px;font-size:16px}.button.active{background:#e3f1e8;border-color:#70a68d;color:var(--green)}
.nav{position:absolute;z-index:20;top:50%;transform:translateY(-50%);height:42px;width:42px;border-radius:50%;border:none;background:#e3e6e5b8;color:#5f6b66;font-size:27px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}.nav:hover{background:#cbd5d1}.nav.prev{left:18px}.nav.next{right:18px}.nav:disabled{opacity:.2;cursor:default}.progress{position:absolute;z-index:21;bottom:17px;left:50%;transform:translateX(-50%);border-radius:999px;background:#1f2c29a6;color:white;padding:6px 15px;font-size:14px;font-variant-numeric:tabular-nums}.hint{position:absolute;left:108px;bottom:53px;font-size:15px;color:#84908c}.dark .hint{color:#b7ccc3}
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .35s,transform .35s}[data-reveal].shown{opacity:1;transform:none}
.divider{height:1px;background:var(--line);margin:18px 0}.mini-arrow{color:#4a8c75;font-size:29px;line-height:1}.flow{display:flex;gap:14px;align-items:stretch}.flow .card{flex:1;min-height:156px}.flow .mini-arrow{align-self:center}.flow-arrow{height:2px;background:#94b8a9;flex:1;position:relative;margin-top:40px}.flow-arrow:after{content:'›';position:absolute;right:-6px;top:-18px;color:#67957f;font-size:32px}
.person{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:600}.avatar{width:35px;height:35px;object-fit:cover;border-radius:50%;background:#fff;border:1px solid #dde6e2}.avatar.lg{width:52px;height:52px}.avatar.xl{width:73px;height:73px}
.mock-window{border:1px solid #cfd9d5;border-radius:18px;background:#fff;overflow:hidden;box-shadow:0 16px 45px #183c3022;color:#17221d}.mock-top{height:50px;border-bottom:1px solid #e2e8e4;display:flex;align-items:center;justify-content:space-between;padding:0 18px;font-size:16px;font-weight:700}.dots{display:inline-flex;gap:6px;margin-right:11px}.dots i{display:block;width:7px;height:7px;border-radius:50%;background:#cfd8d4}.mock-main{display:flex;min-height:430px}.mock-sidebar{width:156px;border-right:1px solid #e5ebe7;background:#f8faf8;padding:20px 12px;display:flex;flex-direction:column;gap:8px}.mock-side-item{font-size:15px;color:#66746e;padding:10px 12px;border-radius:8px}.mock-side-item.on{background:#e9f3ed;color:var(--green);font-weight:700}.mock-content{flex:1;padding:22px 25px}.mock-content h3{font-size:23px;margin-bottom:15px}.mock-msg{display:flex;align-items:flex-start;gap:11px;margin:15px 0}.bubble{padding:12px 15px;border-radius:10px;background:#f4f7f4;font-size:16px;line-height:1.38;max-width:100%}.bubble.self{background:var(--green);color:white}.mock-msg small{display:block;font-size:13px;font-weight:700;color:#55625c;margin-bottom:5px}.mock-app{border:1px solid #dae4df;border-radius:10px;margin:10px 0;padding:12px;background:white;font-size:15px}.mock-composer{margin-top:18px;padding:12px;border:1px solid #dde5df;border-radius:9px;color:#9ca8a2;font-size:15px}.mock-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #ebefed;padding:11px 0;font-size:16px}.mock-row:last-child{border:0}.mock-badge{border-radius:999px;padding:4px 9px;background:#e7f3ec;color:#126b4f;font-size:13px;font-weight:700}
.diagram-panel{background:#f6f9f7;border:1px solid #dce6e1;border-radius:18px;padding:28px}.diagram-panel h3{font-size:20px}.diagram-node{background:white;border:1px solid #d7e2dc;border-radius:14px;padding:18px 22px;display:flex;align-items:center;gap:13px;font-size:19px;font-weight:600;min-height:66px}.diagram-node.strong{background:#e3f0e8;border-color:#97c4aa;color:#064d39}.diagram-node.warn{background:#fff4e9;border-color:#e8cfb3;color:#925624}.diagram-connector{width:2px;height:28px;background:#9ab9aa;margin:0 auto}.diagram-line{height:2px;background:#9ab9aa;flex:1}
.stagebar{display:flex;gap:9px;align-items:center;margin-top:30px}.stagebar span{width:52px;height:7px;border-radius:99px;background:#dce8e1}.stagebar span.on{background:#0b7051}.choice-row{display:flex;gap:14px;flex-wrap:wrap}.choice-row .button{min-width:150px}.big-number{font-size:112px;letter-spacing:-.08em;line-height:1;font-weight:600;color:var(--green)}.dark .big-number{color:#bfe9d0}
.comparison{display:grid;grid-template-columns:1fr 1fr;gap:30px}.comparison .card{min-height:410px}.comparison h3{font-size:26px}.comparison .muted{filter:grayscale(1);opacity:.62}
.timeline{display:flex;gap:0;align-items:flex-start;margin-top:80px}.timeline .time-item{flex:1;border-top:3px solid #cadbd2;padding:22px 16px 0 0;position:relative}.timeline .time-item:before{content:'';position:absolute;top:-9px;left:0;width:15px;height:15px;background:#a9c5b4;border-radius:50%}.timeline .time-item.on{border-color:var(--green)}.timeline .time-item.on:before{background:var(--green)}.timeline strong{font-size:21px}.timeline p{font-size:18px;color:var(--muted);margin-top:10px;line-height:1.4}
.source{position:absolute;left:108px;bottom:52px;font-size:13px;color:#89938f}.dark .source{color:#b8ccc3}
.demo-panel{display:none}.demo-panel.is-active{display:block}.overview{position:absolute;inset:90px 145px;z-index:40;background:#fff;border:1px solid #d6e0da;border-radius:22px;box-shadow:0 20px 80px #1e3e3540;padding:36px;overflow:auto}.overview[hidden]{display:none}.overview h3{font-size:27px;margin-bottom:24px}.overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.overview-grid button{text-align:left;border:1px solid var(--line);background:#f7faf8;border-radius:12px;padding:15px 18px;cursor:pointer;font-size:16px;line-height:1.3;color:#1f2924}.overview-grid button:hover{border-color:#78a78f;background:#eaf4ed}.overview-grid b{color:var(--green);display:block;font-size:13px;margin-bottom:5px}.overview-close{position:absolute;right:28px;top:22px;border:0;background:none;font-size:30px;cursor:pointer;color:#718079}.click-hint{display:inline-flex;align-items:center;gap:8px;font-size:15px;color:#6e8177;margin-top:16px}.pulse-dot{display:inline-block;width:8px;height:8px;background:#40a878;border-radius:50%;box-shadow:0 0 0 5px #def0e4}
@media (prefers-reduced-motion:reduce){.slide,[data-reveal],.card.clickable,.button{transition:none}}
@media print{html,body{background:#fff;overflow:visible;height:auto}#stage{position:static;transform:none!important;box-shadow:none;width:1600px;height:auto}.slide{position:relative;opacity:1;transform:none;pointer-events:auto;page-break-after:always;break-after:page;width:1600px;height:900px}[data-reveal]{opacity:1;transform:none}.nav,.progress{display:none}}