:root{
  --ink:#0f2741; --ink-2:#33485f; --ink-3:#6b7d90;
  --navy:#0f2741; --navy-700:#1c3553; --accent:#1f6f8b; --accent-2:#c2410c; --accent-soft:#e6eef2;
  --line:#d8e0e8; --bg:#eef1f4; --card:#ffffff; --warn:#b45309;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;font-family:'Noto Sans CJK JP','Noto Sans JP',sans-serif;background:#1a1f26;font-feature-settings:"palt";-webkit-font-smoothing:antialiased}
.stage{position:fixed;inset:0;display:flex;align-items:center;justify-content:center}
.deck{position:relative;width:1920px;height:1080px;transform-origin:center center;background:var(--bg);box-shadow:0 30px 80px rgba(0,0,0,.5);overflow:hidden}
.slide{position:absolute;inset:0;padding:84px 110px 96px;display:none;flex-direction:column}
.slide.active{display:flex}
.eyebrow{font-size:21px;font-weight:700;letter-spacing:0.16em;color:var(--accent);margin-bottom:18px;display:flex;align-items:center;gap:14px}
.eyebrow .num{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;color:var(--ink-3);font-weight:700}
.slide h2{font-size:54px;font-weight:800;color:var(--ink);line-height:1.18;margin-bottom:28px}
.slide h3{font-size:30px;font-weight:700;color:var(--ink);margin-bottom:14px}
.slide p,.slide li{font-size:27px;color:var(--ink-2);line-height:1.62}
.slide ul,.slide ol{margin-left:34px}.slide li{margin-bottom:14px}
.lead{font-size:30px;color:var(--ink-2);line-height:1.6;margin-bottom:20px}
.pagenum{position:absolute;right:56px;bottom:42px;font-size:19px;color:var(--ink-3);font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace}
.logo{position:absolute;left:110px;bottom:38px;height:28px;opacity:.55}
.src{position:absolute;left:110px;right:200px;bottom:42px;font-size:17px;color:var(--ink-3);font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;line-height:1.4;overflow-wrap:anywhere}
.src b{color:var(--accent);font-weight:700;font-family:'Noto Sans CJK JP',sans-serif}

/* cover */
.cover{background:radial-gradient(120% 120% at 80% 0%,#1c3553 0%,#0f2741 55%,#0a1c30 100%);color:#fff;justify-content:center}
.cover .eyebrow{color:#8fb6c9}
.cover h1{font-size:84px;font-weight:900;color:#fff;line-height:1.14;letter-spacing:-0.01em}
.cover .clead{font-size:32px;color:rgba(255,255,255,.82);margin-top:28px;font-weight:500}
.logorow{margin-top:64px;display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.logorow img{height:46px;filter:brightness(0) invert(1);opacity:.82}
.logorow .pls{color:rgba(255,255,255,.4);font-size:30px}

/* dividers */
.dayslide{background:var(--navy);color:#fff;justify-content:center}
.dayslide .eyebrow{color:#8fb6c9}
.dayslide h2{color:#fff;font-size:68px}
.dayslide p{color:rgba(255,255,255,.8);font-size:31px;margin-top:8px}

/* layout helpers */
.row{display:flex;gap:48px;align-items:flex-start}
.row .col{flex:1;min-width:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:6px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:32px 34px}
.card h3{font-size:28px;margin-bottom:12px;color:var(--navy-700);display:flex;align-items:center;gap:14px}
.card p,.card li{font-size:24px;line-height:1.55}
.card .big{font-size:27px;font-weight:800;color:var(--accent);display:block;margin-bottom:8px}
.card img.ic{height:38px;width:38px;object-fit:contain}

/* definition block */
.def{background:#fff;border-left:6px solid var(--accent);border-radius:0 14px 14px 0;padding:30px 38px;margin:8px 0 22px;font-size:30px;line-height:1.55;color:var(--ink)}
.def .q{color:var(--ink-3);font-size:23px;display:block;margin-top:14px}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:14px}
.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px 28px;text-align:left}
.stat .n{font-size:64px;font-weight:900;color:var(--accent);line-height:1;letter-spacing:-0.02em}
.stat .n.warm{color:var(--accent-2)}
.stat .l{font-size:22px;color:var(--ink-2);margin-top:14px;line-height:1.45}

/* timeline */
.tl{display:flex;gap:0;margin-top:24px}
.tl .step{flex:1;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px 22px;margin-right:14px;position:relative}
.tl .step:last-child{margin-right:0}
.tl .step .n{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;font-size:21px;color:var(--accent);font-weight:700}
.tl .step h4{font-size:25px;color:var(--ink);margin:6px 0 6px}
.tl .step p{font-size:20px;line-height:1.45}

/* tables */
table.cmp{width:100%;border-collapse:collapse;margin-top:18px;font-size:25px}
table.cmp th,table.cmp td{border:1px solid var(--line);padding:16px 20px;text-align:left;background:#fff;vertical-align:top}
table.cmp th{background:var(--accent-soft);color:var(--navy);font-weight:700}
table.cmp td .with-ic{display:flex;align-items:center;gap:12px;font-weight:700;color:var(--ink)}
table.cmp td img{height:30px;width:30px;object-fit:contain}
table.cmp tr td:first-child{white-space:nowrap}

/* code / flow */
.flow{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;background:#0f2741;color:#dce8ee;border-radius:14px;padding:34px 40px;font-size:25px;line-height:1.85;white-space:pre;margin-top:16px;overflow:auto}
.code{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;background:#0f2741;color:#dce8ee;border-radius:12px;padding:22px 28px;font-size:23px;line-height:1.6;white-space:pre;margin:14px 0}
.code .c{color:#7fa8bd}
.tag{display:inline-block;font-size:21px;font-weight:700;color:var(--accent);background:var(--accent-soft);padding:5px 16px;border-radius:8px;margin-right:8px;margin-bottom:6px}
.kbd{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;background:#fff;border:1px solid var(--ink-3);border-bottom-width:3px;border-radius:7px;padding:3px 12px;font-size:0.86em;color:var(--ink)}

/* image frame */
.shot{border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 24px rgba(15,39,65,.12);width:100%;object-fit:cover}
.caption{font-size:20px;color:var(--ink-3);margin-top:12px}
.hint{margin-top:auto;font-size:23px;color:var(--ink-2);border-top:1px solid var(--line);padding-top:18px;padding-right:220px}
.hint b{color:var(--accent)}

/* references slide */
.reflist{column-count:2;column-gap:56px;margin-top:10px}
.reflist .ref{break-inside:avoid;margin-bottom:20px}
.reflist .ref b{display:block;font-size:23px;color:var(--ink)}
.reflist .ref span{font-size:19px;color:var(--ink-3);font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;overflow-wrap:anywhere}

/* inline code */
code{font-family:'Noto Sans Mono CJK JP','Noto Sans Mono',monospace;background:rgba(31,111,139,.10);color:var(--navy-700);padding:2px 8px;border-radius:5px;font-size:0.9em}