:root{color-scheme:dark;--onyx:#050607;--obsidian:#0a0d0f;--graphite:#11161a;--gunmetal:#1b2227;--silver:#c7c9cc;--silver-hi:#f2f4f5;--muted:#8c949e;--teal:#19c7c0;--teal-deep:#0f6b68;--teal-soft:rgba(25,199,192,.12);--line:rgba(199,201,204,.13);--line-strong:rgba(199,201,204,.25);--danger:#ff6b6b;--warning:#f2b84b;--success:#8ee34d;--ease:cubic-bezier(.22,1,.36,1);font-family:Inter,"Segoe UI",Arial,sans-serif;background:var(--onyx);color:var(--silver)}
*{box-sizing:border-box}[hidden]{display:none!important}html,body{width:100%;height:100%;margin:0;overflow:hidden;background:var(--onyx)}body{-webkit-font-smoothing:antialiased}button,input{font:inherit}button{border:0}button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--teal);outline-offset:3px}.skip-link{position:fixed;z-index:100;left:12px;top:-60px;padding:10px 14px;background:var(--teal);color:var(--onyx);font-weight:700}.skip-link:focus{top:12px}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.ambient{position:fixed;inset:0;pointer-events:none;overflow:hidden}.ambient:before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:72px 72px;opacity:.18;mask-image:linear-gradient(to bottom,black,transparent 85%)}.ambient i{position:absolute;border:1px solid rgba(25,199,192,.1);border-radius:50%;animation:drift 18s linear infinite}.ambient i:nth-child(1){width:48vw;height:48vw;right:-12vw;top:-20vw}.ambient i:nth-child(2){width:32vw;height:32vw;left:18vw;bottom:-20vw;animation-duration:24s}.ambient i:nth-child(3){width:9px;height:9px;left:11%;top:17%;background:var(--teal);box-shadow:0 0 28px var(--teal);animation-duration:10s}@keyframes drift{50%{transform:translate3d(18px,12px,0);opacity:.6}}
.app-shell{position:relative;z-index:1;height:100dvh;display:grid;grid-template-rows:72px 2px minmax(0,1fr) 58px}.topbar{display:grid;grid-template-columns:auto minmax(170px,1fr) minmax(180px,1fr) auto;align-items:center;gap:18px;padding:0 24px;border-bottom:1px solid var(--line);background:rgba(5,6,7,.84);backdrop-filter:blur(18px)}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}.brand img{width:118px;height:38px;object-fit:contain}.brand span,.module-now small{color:var(--muted);font:600 9px ui-monospace,Consolas,monospace;letter-spacing:.15em;text-transform:uppercase}.module-now{justify-self:center;text-align:center}.module-now small{display:block;color:var(--teal)}.module-now strong{display:block;margin-top:4px;color:var(--silver-hi);font-size:12px;font-weight:600}.top-actions{display:flex;gap:7px;justify-self:end}.icon-button,.text-button{min-height:36px;border:1px solid var(--line);border-radius:3px;background:transparent;color:var(--muted);cursor:pointer}.icon-button{width:38px}.text-button{padding:0 11px}.icon-button:hover,.text-button:hover,.text-button[aria-pressed=true]{border-color:rgba(25,199,192,.45);color:var(--teal);background:var(--teal-soft)}kbd{padding:2px 5px;border:1px solid var(--line-strong);border-radius:2px;background:var(--obsidian);color:var(--muted);font:9px ui-monospace,Consolas,monospace}.progress{background:rgba(199,201,204,.06)}.progress i{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--teal-deep),var(--teal));box-shadow:0 0 16px rgba(25,199,192,.65);transition:width .35s var(--ease)}
.slide-stage{position:relative;min-height:0;overflow:hidden}.slide{position:absolute;inset:0;display:grid;align-content:center;gap:28px;padding:clamp(38px,5vw,82px) clamp(34px,7vw,110px);opacity:0;transform:translateX(24px);transition:.45s var(--ease);pointer-events:none}.slide.is-active{opacity:1;transform:none;pointer-events:auto}.slide:before{content:attr(data-index);position:absolute;right:4vw;bottom:2vh;color:rgba(199,201,204,.035);font-size:clamp(120px,24vw,360px);font-weight:300;letter-spacing:-.1em;line-height:.8;pointer-events:none}.slide-inner{position:relative;z-index:2;max-width:1240px;width:100%;margin:auto}.eyebrow{display:flex;align-items:center;gap:12px;color:var(--teal);font:600 10px ui-monospace,Consolas,monospace;letter-spacing:.18em;text-transform:uppercase}.eyebrow:before{content:"";width:28px;height:1px;background:var(--teal);box-shadow:0 0 10px var(--teal)}h1,h2,h3,p{margin-top:0}.slide h1,.slide h2{max-width:15ch;margin:22px 0 24px;color:var(--silver-hi);font-size:clamp(48px,6.4vw,98px);font-weight:300;line-height:.94;letter-spacing:-.065em}.slide h1 em,.slide h2 em{color:var(--muted);font-style:normal}.lead{max-width:760px;color:var(--muted);font-size:clamp(17px,1.55vw,23px);line-height:1.5}.lead strong{color:var(--silver-hi);font-weight:600}.grid{display:grid;grid-template-columns:repeat(var(--cols,3),minmax(0,1fr));gap:12px;margin-top:30px}.card{min-height:150px;padding:22px;border:1px solid var(--line);background:rgba(10,13,15,.72);backdrop-filter:blur(10px)}.card small{display:block;margin-bottom:18px;color:var(--teal);font:600 9px ui-monospace,Consolas,monospace;letter-spacing:.13em;text-transform:uppercase}.card h3{margin:0 0 9px;color:var(--silver-hi);font-size:18px;font-weight:500}.card p,.card li{color:var(--muted);font-size:13px;line-height:1.55}.card ul{margin:0;padding-left:18px}.number{display:block;margin-bottom:14px;color:var(--teal);font:300 42px/1 ui-monospace,Consolas,monospace}.quote{max-width:1000px;margin:38px 0 0;padding:22px 0 22px 26px;border-left:2px solid var(--teal);color:var(--silver-hi);font-size:clamp(22px,2.4vw,34px);font-weight:300;line-height:1.3}.callout{display:flex;align-items:flex-start;gap:14px;max-width:900px;margin-top:28px;padding:17px 20px;border:1px solid rgba(25,199,192,.26);background:var(--teal-soft);color:var(--silver)}.callout b{color:var(--teal)}.flow{display:flex;align-items:stretch;gap:0;margin-top:34px;overflow-x:auto}.flow span{position:relative;min-width:150px;flex:1;padding:20px 28px 20px 18px;border:1px solid var(--line);color:var(--silver-hi);font-size:13px}.flow span+span{border-left:0}.flow span:not(:last-child):after{content:"→";position:absolute;z-index:2;right:-10px;top:50%;transform:translateY(-50%);color:var(--teal);background:var(--onyx);padding:4px}.code{max-width:980px;margin-top:26px;padding:22px;border:1px solid var(--line);background:#020304;color:#b8e9e7;font:13px/1.7 ui-monospace,Consolas,monospace;white-space:pre-wrap;overflow:auto}.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);gap:42px;align-items:center}.activity-panel{padding:28px;border:1px solid rgba(25,199,192,.36);background:linear-gradient(135deg,rgba(25,199,192,.11),rgba(10,13,15,.74))}.activity-panel .duration{display:inline-flex;padding:6px 9px;border:1px solid rgba(25,199,192,.4);color:var(--teal);font:600 9px ui-monospace,Consolas,monospace;letter-spacing:.12em;text-transform:uppercase}.activity-panel ol{margin:22px 0 0;padding-left:22px}.activity-panel li{margin:11px 0;color:var(--silver);line-height:1.45}.evidence{margin-top:20px;color:var(--muted);font:12px ui-monospace,Consolas,monospace}.evidence b{color:var(--success)}.slide[data-kind="break"]{text-align:center}.slide[data-kind="break"] .slide-inner{max-width:860px}.slide[data-kind="break"] h2{margin-left:auto;margin-right:auto}.slide[data-kind="activity"] h2{font-size:clamp(42px,5vw,78px)}.source{margin-top:20px;color:var(--muted);font:10px ui-monospace,Consolas,monospace}.source a{color:var(--teal)}
.controls{display:grid;grid-template-columns:minmax(120px,1fr) auto minmax(0,1fr) minmax(120px,1fr);align-items:center;gap:18px;padding:0 24px;border-top:1px solid var(--line);background:rgba(5,6,7,.92)}.controls>button,.timer button{height:36px;border:1px solid var(--line);border-radius:3px;background:transparent;color:var(--muted);cursor:pointer}.controls>button:first-child{justify-self:start;padding:0 14px}.controls>button:last-child{justify-self:end;padding:0 14px}.controls>button:hover,.timer button:hover{border-color:rgba(25,199,192,.4);color:var(--teal)}.slide-meta{text-align:center}.slide-meta span{display:block}.slide-meta span:first-child{color:var(--silver-hi);font:600 10px ui-monospace,Consolas,monospace}.slide-meta span:last-child{margin-top:3px;color:var(--muted);font-size:9px}.timer{display:flex;align-items:center;justify-content:center;gap:7px;color:var(--teal);font:600 12px ui-monospace,Consolas,monospace}.timer button{height:28px;padding:0 9px;font-size:9px}.timer button:last-child{width:28px;padding:0}
.course-map{position:fixed;z-index:50;inset:0 auto 0 0;width:min(430px,92vw);display:grid;grid-template-rows:auto auto auto minmax(0,1fr);gap:16px;padding:24px;border-right:1px solid var(--line-strong);background:rgba(5,6,7,.97);backdrop-filter:blur(24px);box-shadow:30px 0 80px rgba(0,0,0,.4);transform:translateX(-102%);transition:.38s var(--ease)}.course-map.is-open{transform:none}.map-head,.notes-head,.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.map-head small,.dialog-head small{color:var(--teal);font:600 9px ui-monospace,Consolas,monospace;letter-spacing:.15em;text-transform:uppercase}.map-head h2,.dialog-head h2{margin:5px 0 0;color:var(--silver-hi);font-size:26px;font-weight:400}.map-search{display:grid;grid-template-columns:20px 1fr;gap:8px;padding:10px 12px;border:1px solid var(--line);background:var(--obsidian);color:var(--muted)}.map-search input{border:0;outline:0;background:transparent;color:var(--silver)}.module-list{display:flex;gap:5px;overflow-x:auto;padding-bottom:4px}.module-list button{flex:0 0 auto;padding:7px 9px;border:1px solid var(--line);background:transparent;color:var(--muted);font:600 9px ui-monospace,Consolas,monospace;cursor:pointer}.module-list button.is-active{border-color:var(--teal);color:var(--teal);background:var(--teal-soft)}.slide-list{min-height:0;overflow:auto;scrollbar-color:var(--teal-deep) transparent}.slide-link{display:grid;grid-template-columns:30px 1fr;gap:10px;width:100%;padding:12px 5px;border-bottom:1px solid var(--line);background:transparent;color:var(--muted);text-align:left;cursor:pointer}.slide-link span:first-child{color:var(--teal);font:10px ui-monospace,Consolas,monospace}.slide-link strong{display:block;color:var(--silver);font-size:12px;font-weight:500}.slide-link small{display:block;margin-top:4px;color:var(--muted);font-size:9px}.slide-link:hover,.slide-link.is-active{background:var(--teal-soft)}
.speaker-notes{position:fixed;z-index:45;right:18px;top:92px;bottom:76px;width:min(420px,calc(100vw - 36px));padding:20px;border:1px solid var(--line-strong);background:rgba(10,13,15,.97);box-shadow:0 26px 70px rgba(0,0,0,.45);transform:translateX(calc(100% + 30px));transition:.35s var(--ease)}.speaker-notes.is-open{transform:none}.notes-head{padding-bottom:14px;border-bottom:1px solid var(--line);color:var(--teal);font:600 9px ui-monospace,Consolas,monospace;letter-spacing:.12em;text-transform:uppercase}.notes-head button{background:transparent;color:var(--muted);font-size:20px;cursor:pointer}.speaker-notes #notes-content{height:calc(100% - 45px);padding-top:18px;overflow:auto;color:var(--silver);font-size:14px;line-height:1.65}.speaker-notes #notes-content p{margin-bottom:14px}.speaker-notes #notes-content b{color:var(--teal)}
dialog{width:min(620px,calc(100vw - 32px));padding:0;border:1px solid var(--line-strong);border-radius:4px;background:var(--obsidian);color:var(--silver);box-shadow:0 30px 100px rgba(0,0,0,.6)}dialog::backdrop{background:rgba(0,0,0,.7);backdrop-filter:blur(8px)}dialog form{padding:26px}.dialog-head button{background:transparent;color:var(--muted);font-size:22px;cursor:pointer}.shortcut-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:26px 0}.shortcut-grid span{padding:13px;border:1px solid var(--line);color:var(--muted);font-size:12px}
@media(max-width:820px){.app-shell{grid-template-rows:64px 2px minmax(0,1fr) 60px}.topbar{grid-template-columns:auto minmax(0,1fr) auto;padding:0 12px;gap:9px}.brand img{width:98px}.brand span,.module-now,.text-button{display:none}.top-actions{gap:5px}.slide{align-content:start;overflow-y:auto;padding:34px 18px 70px;scrollbar-width:thin;scrollbar-color:var(--teal) transparent}.slide h1,.slide h2{font-size:clamp(38px,12vw,64px)}.lead{font-size:16px}.grid{grid-template-columns:1fr}.split{grid-template-columns:1fr;gap:24px}.card{min-height:0}.flow span{min-width:138px}.controls{grid-template-columns:auto 1fr auto;padding:0 12px;gap:8px}.controls>button span,.slide-meta span:last-child{display:none}.controls>button:first-child,.controls>button:last-child{padding:0 12px}.timer{position:fixed;z-index:12;left:50%;bottom:68px;transform:translateX(-50%);padding:7px 9px;border:1px solid var(--line);background:var(--obsidian)}.speaker-notes{top:72px;bottom:68px;right:8px}.slide:before{font-size:42vw}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.ambient i{display:none}}
@media print{html,body{overflow:visible;background:white;color:black}.topbar,.controls,.progress,.course-map,.speaker-notes,.ambient{display:none!important}.app-shell{height:auto;display:block}.slide-stage{overflow:visible}.slide{position:relative;display:block;min-height:100vh;page-break-after:always;opacity:1;transform:none;color:#111;background:white}.slide h1,.slide h2,.card h3{color:#111}.lead,.card p,.card li,.source{color:#333}.card{background:white;border-color:#bbb}.slide:before{display:none}}

/* Unified navigation and scrolling */
.slide-stage{isolation:isolate}.slide-stage:before,.slide-stage:after{content:"";position:absolute;z-index:5;left:0;right:3px;height:24px;pointer-events:none}.slide-stage:before{top:0;background:linear-gradient(var(--onyx),transparent)}.slide-stage:after{bottom:0;background:linear-gradient(transparent,var(--onyx))}
.slide{overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth;scrollbar-gutter:stable;touch-action:pan-y;scroll-padding-block:24px}
.slide::-webkit-scrollbar,.slide-list::-webkit-scrollbar,.speaker-notes #notes-content::-webkit-scrollbar,.module-list::-webkit-scrollbar,.flow::-webkit-scrollbar,.code::-webkit-scrollbar{width:8px;height:7px}.slide::-webkit-scrollbar-track,.slide-list::-webkit-scrollbar-track,.speaker-notes #notes-content::-webkit-scrollbar-track,.module-list::-webkit-scrollbar-track,.flow::-webkit-scrollbar-track,.code::-webkit-scrollbar-track{background:rgba(199,201,204,.04)}.slide::-webkit-scrollbar-thumb,.slide-list::-webkit-scrollbar-thumb,.speaker-notes #notes-content::-webkit-scrollbar-thumb,.module-list::-webkit-scrollbar-thumb,.flow::-webkit-scrollbar-thumb,.code::-webkit-scrollbar-thumb{border-radius:8px;background:linear-gradient(var(--teal),var(--teal-deep));box-shadow:0 0 12px rgba(25,199,192,.35)}
.slide-list,.speaker-notes #notes-content,.module-list,.flow,.code{overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--teal-deep) rgba(199,201,204,.04)}
.slide-scroll-status{position:fixed;z-index:18;right:0;top:74px;bottom:58px;width:3px;background:rgba(199,201,204,.055);opacity:0;transition:opacity .2s var(--ease);pointer-events:none}.slide-scroll-status.is-visible{opacity:1}.slide-scroll-status i{display:block;width:100%;height:0;background:linear-gradient(180deg,#2fe5dd,var(--teal-deep));box-shadow:0 0 14px rgba(25,199,192,.78);transition:height .12s linear}
.slide-back-to-top{position:fixed;z-index:19;right:18px;bottom:72px;display:flex;align-items:center;gap:8px;min-height:38px;padding:0 12px;border:1px solid rgba(25,199,192,.38);border-radius:3px;background:rgba(10,13,15,.94);color:var(--teal);box-shadow:0 14px 34px rgba(0,0,0,.35);opacity:0;pointer-events:none;transform:translateY(10px);transition:.22s var(--ease);cursor:pointer}.slide-back-to-top small{color:var(--silver);font:600 8px ui-monospace,Consolas,monospace;letter-spacing:.08em;text-transform:uppercase}.slide-back-to-top.is-visible{opacity:1;pointer-events:auto;transform:none}.slide-back-to-top:hover{background:var(--teal-soft)}
.panel-backdrop{position:fixed;z-index:40;inset:0;background:rgba(0,0,0,.56);backdrop-filter:blur(3px);opacity:0;visibility:hidden;transition:.25s var(--ease)}.panel-backdrop.is-visible{opacity:1;visibility:visible}.course-map{z-index:50}.speaker-notes{z-index:45}
.controls>button:disabled{cursor:not-allowed;opacity:.3}.controls>button:disabled:hover{border-color:var(--line);color:var(--muted)}
@media(max-width:820px){.app-shell{grid-template-rows:64px 2px minmax(0,1fr) calc(60px + env(safe-area-inset-bottom))}.controls{padding-bottom:env(safe-area-inset-bottom)}.slide{padding-bottom:86px}.slide-scroll-status{top:66px;bottom:calc(60px + env(safe-area-inset-bottom))}.slide-back-to-top{right:12px;bottom:calc(72px + env(safe-area-inset-bottom))}.course-map{padding-bottom:calc(24px + env(safe-area-inset-bottom))}.speaker-notes{bottom:calc(68px + env(safe-area-inset-bottom))}}
@media print{.slide-scroll-status,.slide-back-to-top,.panel-backdrop{display:none!important}}