@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght,SOFT,WONK@9..144,400..700,0..100,0..1&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --paper: #faf7f0;
  --ink: #1a1a1a;
  --muted: #6b6560;
  --line: #d9d3c7;
  --card: #ffffff;
  --deck: #1a1a1a;
  --good: #16a34a;
  --bad: #dc2626;
  --warn: #d97706;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --c-browser: #2f80ed; --c-node: #3c873a; --c-ts: #3178c6; --c-bundler: #d97706;
  --c-react: #0e9aa7; --c-next: #111111; --c-data: #7c3aed; --c-stacks: #b91c1c;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 18px; line-height: 1.55;
  overflow: hidden;
  /* the floor you're on tints the walls: paper takes 3% of the deck colour, the grid 9% */
  background-color: color-mix(in srgb, var(--paper) 97%, var(--deck));
  background-image:
    linear-gradient(color-mix(in srgb, var(--deck) 9%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--deck) 9%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -1px -1px;
}
/* floor band along the top edge */
body::before { content: ''; position: fixed; left: 0; right: 0; top: 0; height: 5px; background: var(--deck); z-index: 60; }
a { color: inherit; }
code, pre, .mono { font-family: var(--mono); }
code { background: rgba(0,0,0,.05); padding: .05em .35em; border-radius: 4px; font-size: .92em; }
pre { background: #14141a; color: #e8e6df; padding: 16px 18px; border-radius: 10px; font-size: 14.5px; line-height: 1.5; overflow: auto; margin: 0; }
pre .k { color: #c678dd; } pre .s { color: #98c379; } pre .f { color: #61afef; } pre .c { color: #7f848e; font-style: italic; } pre .t { color: #e5c07b; } pre .n { color: #d19a66; } pre .err { text-decoration: underline wavy #ff5c5c; text-underline-offset: 3px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.12; margin: 0 0 .4em; letter-spacing: -.01em; font-variation-settings: 'SOFT' 40, 'WONK' 1; }
h1 { font-size: clamp(34px, 4.6vw, 58px); }
h2 { font-size: clamp(26px, 3.2vw, 40px); }
h1 code, h2 code { font-size: .78em; padding: .02em .25em; }
h3 { font-size: 22px; }
p { margin: 0 0 .9em; max-width: 62ch; }
.muted { color: var(--muted); }
.small { font-size: 15px; }
strong { font-weight: 600; }
em { font-style: italic; }

/* ---- slides ---- */
section.slide {
  position: absolute; inset: 0 0 64px 0; display: none; overflow: auto;
  padding: 48px clamp(20px, 6vw, 96px) 32px;
}
section.slide.active { display: flex; flex-direction: column; justify-content: safe center; align-items: center; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; }
.center { text-align: center; }
.center p { margin-left: auto; margin-right: auto; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.two > * { min-width: 0; }
.stage [class] > * { min-width: 0; }
.stage { min-width: 0; }
pre { max-width: 100%; }
.two.wide-right { grid-template-columns: 5fr 7fr; }
.two.wide-left { grid-template-columns: 7fr 5fr; }
.stack { display: flex; flex-direction: column; gap: 18px; }
.eyebrow { font-family: var(--mono); font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--deck); margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.eyebrow::before { content: ''; width: 11px; height: 11px; background: var(--deck); flex: none; }
.center .eyebrow { justify-content: center; }
.lede { font-size: 22px; line-height: 1.5; }
.big { font-family: var(--serif); font-size: clamp(24px, 2.6vw, 34px); line-height: 1.3; font-weight: 400; font-variation-settings: 'SOFT' 60, 'WONK' 1; }

/* ---- bar ---- */
.bar {
  position: fixed; left: 0; right: 0; bottom: 0; height: 64px; background: var(--card);
  border-top: 1px solid var(--line); display: grid; grid-template-columns: 48px 1fr auto 1fr auto; align-items: center; gap: 12px; padding: 0 16px; z-index: 50;
}
.bar-home { text-decoration: none; font-size: 22px; color: var(--muted); text-align: center; }
.bar-home:hover { color: var(--ink); }
.bar-title { font-family: var(--serif); font-size: 17px; display: flex; align-items: center; gap: 10px; color: var(--muted); }
.dot-deck { width: 10px; height: 10px; border-radius: 50%; background: var(--deck); display: inline-block; }
.dots { display: flex; gap: 8px; justify-content: center; }
.dot { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--ink); background: transparent; padding: 0; cursor: pointer; opacity: .25; transition: .2s; }
.dot.seen { opacity: .7; }
.dot:not(.seen) { cursor: default; }
.dot.on { background: var(--ink); opacity: 1; transform: scale(1.15); }
.dot.seen:hover { transform: scale(1.25); }
.bar-map { justify-self: end; font: 500 13px var(--mono); letter-spacing: .1em; text-transform: uppercase; background: none; border: 1.5px solid var(--ink); border-radius: 999px; padding: 6px 14px; cursor: pointer; }
.bar-map:hover { background: var(--ink); color: var(--paper); }
.bar-nav { display: flex; gap: 8px; }
.bar-nav button { width: 40px; height: 40px; border-radius: 50%; border: 1.5px solid var(--ink); background: var(--card); font-size: 18px; cursor: pointer; transition: .15s; }
.bar-nav button:hover:not(:disabled) { background: var(--deck); border-color: var(--deck); color: #fff; }
.bar-nav button:disabled { opacity: .25; cursor: default; }
.bar-nav button.locked { border-style: dashed; }

/* ---- buttons, doors ---- */
.btn { display: inline-flex; align-items: center; gap: 8px; font: 600 16px var(--sans); background: var(--ink); color: var(--paper); border: 2px solid var(--ink); padding: 11px 20px; border-radius: 12px; cursor: pointer; text-decoration: none; transition: .15s; }
.btn:hover { transform: translate(-1px,-1px); box-shadow: 3px 3px 0 var(--deck); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.small { font-size: 14px; padding: 7px 14px; border-radius: 9px; }
.btn.deck { background: var(--deck); border-color: var(--deck); }
.btn:disabled { opacity: .4; cursor: default; transform: none; box-shadow: none; }
.bets { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
.bets .btn { background: var(--card); color: var(--ink); }
.bets .btn.picked { background: var(--ink); color: var(--paper); }
.bets .btn.right { background: var(--good); border-color: var(--good); color: #fff; }
.bets .btn.wrong { background: var(--bad); border-color: var(--bad); color: #fff; }
.reveal { display: none; }
.reveal.shown { display: block; animation: fade .4s ease; }
.gate-hint { font-family: var(--mono); font-size: 13px; color: var(--muted); margin-top: 10px; }
.gate-hint::before { content: '↳ '; }
.gate-hint.done { color: var(--good); }
.gate-hint.done::before { content: '✓ '; }
.gate-hint.nudge { animation: shake .4s; color: var(--warn); }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }

.door { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; border: 1.5px solid var(--ink); border-radius: 10px; padding: 8px 14px; background: var(--card); font-weight: 500; font-size: 16px; transition: .15s; margin: 4px 6px 4px 0; }
.door::before { content: '⇢'; opacity: .6; }
.door:hover { background: var(--ink); color: var(--paper); }
.door.inline { padding: 1px 8px; border-radius: 6px; font-size: .95em; margin: 0 2px; vertical-align: baseline; }
.door.inline::before { content: '⇢'; font-size: .9em; }
.doors { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.doors > span { color: var(--muted); font-size: 15px; margin-right: 6px; }
.door[data-c="browser"] { border-color: var(--c-browser); color: var(--c-browser); }
.door[data-c="node"] { border-color: var(--c-node); color: var(--c-node); }
.door[data-c="ts"] { border-color: var(--c-ts); color: var(--c-ts); }
.door[data-c="bundler"] { border-color: var(--c-bundler); color: var(--c-bundler); }
.door[data-c="react"] { border-color: var(--c-react); color: var(--c-react); }
.door[data-c="next"] { border-color: var(--c-next); color: var(--c-next); }
.door[data-c="data"] { border-color: var(--c-data); color: var(--c-data); }
.door[data-c="stacks"] { border-color: var(--c-stacks); color: var(--c-stacks); }
.door[data-c]:hover { background: currentColor; }
.door[data-c]:hover { color: #fff; }

/* ---- stage (playables) ---- */
.stage { background: var(--card); border: 1.5px solid var(--ink); border-radius: 14px; padding: 20px; box-shadow: 8px 8px 0 var(--deck); position: relative; }
.stage.fixed { height: 420px; }
.scrollbox { overflow: auto; }
.stage-label { position: absolute; top: -13px; left: 16px; background: var(--deck); color: #fff; padding: 3px 10px; border-radius: 6px; font: 500 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
[data-deck="home"] .stage-label, [data-deck="napkin"] .stage-label, [data-deck="nextjs"] .stage-label, [data-deck="data"] .stage-label { color: var(--paper); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.note { font-size: 14px; color: var(--muted); margin-top: 10px; }
input[type=range] { accent-color: var(--deck); }
.tag { display: inline-block; font: 500 12px var(--mono); padding: 2px 8px; border-radius: 6px; background: rgba(0,0,0,.06); }
.flash { animation: flash .6s; }
@keyframes flash { 0% { background: #fde68a; } 100% { background: transparent; } }
.footnote { font-size: 14px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 10px; margin-top: 18px; max-width: 62ch; }

/* terminal */
.term { background: #0d0f14; color: #d7dbe0; font-family: var(--mono); font-size: 15px; border-radius: 12px; padding: 18px 20px; line-height: 1.6; min-height: 120px; box-shadow: 8px 8px 0 color-mix(in srgb, var(--deck) 35%, transparent); }
.term .prompt { color: #7dd3fc; }
.term .cursor { display: inline-block; width: 9px; height: 18px; background: #d7dbe0; vertical-align: -3px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.term .dim { color: #6b7280; }
.term .ok { color: #4ade80; }

/* ---- elevator rail: which floor of the building you're on ---- */
.rail { position: fixed; left: 18px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 3px; z-index: 40; }
.rail a { display: block; width: 14px; height: 14px; border: 1.5px solid var(--ink); background: var(--paper); opacity: .35; transition: .2s; position: relative; text-decoration: none; }
.rail a:hover { opacity: 1; transform: scale(1.2); }
.rail a.seen { background: var(--c); border-color: var(--c); opacity: .55; }
.rail a.here { background: var(--c); border-color: var(--ink); opacity: 1; transform: scale(1.35); box-shadow: 2px 2px 0 var(--ink); }
.rail a.roof { border-radius: 7px 7px 0 0; }
.rail a::after { content: attr(data-label); position: absolute; left: 22px; top: 50%; transform: translateY(-50%); white-space: nowrap; font: 500 11px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink); background: var(--paper); padding: 1px 6px; border: 1px solid var(--line); border-radius: 4px; opacity: 0; pointer-events: none; transition: .15s; }
.rail a:hover::after { opacity: 1; }
.rail a.here:hover::after { transform: translateY(-50%) scale(.74); left: 20px; }
.rail .ground { height: 3px; background: var(--ink); margin-top: 3px; opacity: .35; }
.floor-tag { font: 600 11px var(--mono); letter-spacing: .06em; background: var(--deck); color: #fff; padding: 2px 6px; border-radius: 4px; }
@media (max-width: 1100px) { .rail { display: none; } }

/* ---- map overlay ---- */
.map { position: fixed; inset: 0; background: rgba(20,20,20,.55); backdrop-filter: blur(3px); display: none; z-index: 100; align-items: center; justify-content: center; }
.map.open { display: flex; }
.map-inner { background: var(--paper); border-radius: 18px; padding: 24px 32px; width: min(680px, 92vw); max-height: 88vh; overflow: auto; position: relative; }
.map-close { position: absolute; top: 12px; right: 14px; background: none; border: 0; font-size: 28px; cursor: pointer; color: var(--muted); }
.map-sub { color: var(--muted); margin-bottom: 16px; }
.map-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.map-item a { display: grid; grid-template-columns: 14px 1fr auto auto; gap: 12px; align-items: center; text-decoration: none; padding: 5px 12px; border-radius: 10px; border: 1.5px solid transparent; }
.map-item a:hover { background: var(--card); border-color: var(--line); }
.map-item i { width: 14px; height: 14px; border-radius: 4px; display: inline-block; }
.map-item.sub a { margin-left: 28px; }
.map-item.sub i { border-radius: 50%; }
.map-item.here a { border-color: var(--ink); background: var(--card); }
.map-item b { font-family: var(--serif); font-weight: 600; font-size: 18px; }
.map-id { font: 500 12px var(--mono); color: var(--muted); }
.map-prog { font: 500 12px var(--mono); color: var(--muted); }
.map-item.seen .map-prog { color: var(--good); }

/* ---- tower (home): a building section ---- */
.tower { display: flex; flex-direction: column; width: 100%; max-width: 520px; margin: 0 auto; position: relative; padding-top: 12px; }
.tower::before { content: ''; height: 10px; border-radius: 6px 6px 0 0; margin: 0 22px; background: var(--ink); position: absolute; top: 2px; left: 0; right: 0; }
.tower a { display: grid; grid-template-columns: 44px 1fr auto; align-items: center; column-gap: 14px; text-decoration: none; padding: 0 16px 0 0; background: var(--card); border: 1.5px solid var(--ink); border-top: 0; position: relative; transition: .15s; min-height: 62px; --f: var(--ink); }
.tower a > div { padding: 11px 0 9px; min-width: 0; line-height: 1.25; }
.tower a:first-child { border-top: 1.5px solid var(--ink); }
.tower a:last-child { border-bottom-width: 6px; }
.tower a:hover { background: color-mix(in srgb, var(--f) 9%, var(--card)); }
.tower a .plate { align-self: stretch; background: var(--f); color: #fff; display: flex; align-items: center; justify-content: center; font: 600 13px var(--mono); letter-spacing: .04em; }
.tower a:hover .plate { letter-spacing: .12em; }
.tower a b { font-family: var(--serif); font-size: 18px; font-variation-settings: 'SOFT' 40, 'WONK' 1; }
.tower a span { color: var(--muted); font-size: 13px; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }
.tower a small { font: 500 12px var(--mono); color: var(--muted); white-space: nowrap; }
.tower a .because { position: absolute; right: 12px; top: -8px; line-height: 13px; font: 500 10px/13px var(--mono); letter-spacing: .04em; color: var(--muted); background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; z-index: 1; }
.tower a .because::before { content: 'because '; color: var(--f); font-weight: 600; }
.tower .ground { margin-top: 0; height: 16px; background: repeating-linear-gradient(135deg, transparent 0 5px, rgba(0,0,0,.18) 5px 6.5px); position: relative; }
.tower .ground::after { content: 'your laptop'; position: absolute; right: 0; top: 18px; font: 500 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

/* ---- misc widgets ---- */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; border: 1.5px solid var(--ink); background: var(--card); font-size: 14px; font-weight: 500; cursor: grab; user-select: none; transition: .2s; }
.chip.ghosted { opacity: .35; }
.box { border: 1.5px dashed var(--line); border-radius: 12px; padding: 12px; min-height: 80px; }
.box h4 { margin: 0 0 8px; font: 600 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.kbd { font: 500 12px var(--mono); border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px; background: var(--card); }
.pill-good { color: var(--good); font-weight: 600; } .pill-bad { color: var(--bad); font-weight: 600; }
table.plain { border-collapse: collapse; width: 100%; font-size: 15px; }
table.plain th, table.plain td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.plain th { font: 600 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
textarea.code { width: 100%; white-space: pre; overflow-x: auto; font: 14.5px/1.5 var(--mono); background: #14141a; color: #e8e6df; border: 0; border-radius: 10px; padding: 14px; resize: none; outline: none; }

@media (max-width: 860px) {
  .two, .two.wide-right, .two.wide-left { grid-template-columns: 1fr; gap: 24px; }
  body { font-size: 16px; }
  .bar { grid-template-columns: 40px 1fr auto; }
  .bar-title, .bar-map { display: none; }
}