/* Playbook section: the delivery flow diagram, its version switch and the zoomed close-ups. Needs site.css. */
.playbook { padding: clamp(64px, 10vh, 112px) clamp(16px, 4vw, 48px); border-top: 1px solid var(--line); }
.pb-tools { display: flex; justify-content: center; align-items: center; gap: 12px 22px; flex-wrap: wrap; margin-top: 18px; }
.pb-hint { display: inline-flex; align-items: center; gap: 8px; font: 400 12px var(--mono); color: var(--pg4i); }
.pb-hint svg { flex: none; }
.pb-hint[hidden] { display: none; }
.pb-ver { display: inline-flex; align-items: center; gap: 8px; font: 400 11px var(--mono); color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }
.pb-ver .switch button { padding: 4px 10px; font-size: 11px; letter-spacing: 0; text-transform: none; }
.detail { max-width: 720px; margin: 0 auto; min-height: 92px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--card); transition: background-color .4s; }
.detail .k { font: 500 12px var(--mono); color: var(--flow); letter-spacing: .1em; text-transform: uppercase; margin: 0; }
.detail .p { margin: 6px 0 0; }

/* ---------- the diagram ---------- */
.pmbok { max-width: 1120px; margin: 0 auto; overflow-x: auto; }
.pf-svg { width: 100%; min-width: 900px; height: auto; display: block; }
.pf-card { fill: var(--card); stroke: var(--line); stroke-width: 1.2; transition: stroke .35s; }
.pf-card.on { stroke-width: 2; }
.pf-pg { font: 600 15px var(--display); fill: #0a0f1c; }
.pf-ka { font: 500 11px var(--sans); fill: var(--ink); }
.pf-core { stroke-width: 1.3; stroke-dasharray: 5 5; stroke-opacity: .7; }
.pf-bracket { fill: none; stroke-width: 1.1; stroke-dasharray: 3 4; stroke-opacity: .45; }
.pf-chipbg { fill: transparent; stroke: transparent; transition: fill .25s, stroke .25s; }
.pf-kat { stroke-width: 1.2; stroke-opacity: .5; transition: stroke-opacity .25s, transform .25s; transform-box: fill-box; transform-origin: center; }
.pf-chip.lit .pf-chipbg, .pf-chip.hot .pf-chipbg, .pf-tile.hot rect, .pf-gate.hot .pf-gatebg { fill: var(--bg-2); stroke: var(--line); }
.pf-chip.lit .pf-kat, .pf-chip.hot .pf-kat { stroke-opacity: 1; transform: scale(1.08); }
.pf-chip, .pf-tile, .pf-gate { cursor: pointer; outline: none; }
.pf-gatebg { fill: var(--card); stroke-width: 1.8; transition: fill .3s; }
.pf-gate.flash .pf-gatebg { fill: var(--bg-2); }
.pf-gate.flash { filter: drop-shadow(0 0 6px rgba(94, 230, 200, .45)); }
.pf-conn { fill: none; stroke-width: 1.4; stroke-dasharray: 5 6; stroke-opacity: .75; }
@media (prefers-reduced-motion: no-preference) { .pf-conn { animation: pfmarch 1.1s linear infinite; } }
@keyframes pfmarch { to { stroke-dashoffset: -11; } }
.pf-dot { pointer-events: none; }
.pf-token { pointer-events: none; }
.pf-halo { fill: #ffffff; opacity: .16; }
.pf-tokbg { fill: #e8edf7; stroke: #0a0f1c; stroke-width: 1; }
.pf-legend { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; align-items: center; font: 400 12px var(--mono); color: var(--muted); margin: 14px 0 18px; }
.pf-legend svg { vertical-align: -3px; margin-right: 8px; }

/* chips that open a close-up: brighter tile and a slow pulse ring */
.pf-chip.pf-zoom { cursor: zoom-in; }
.pf-chip.pf-zoom .pf-kat { stroke-opacity: 1; stroke-width: 1.6; }
.pf-chip.pf-zoom .pf-ka { font-weight: 600; }
.pf-ring { fill: none; stroke-width: 1.5; transform-box: fill-box; transform-origin: center; pointer-events: none; opacity: 0; }
.pf-chip.pf-zoom:hover .pf-ring, .pf-chip.pf-zoom:focus-visible .pf-ring { opacity: .7; }
@media (prefers-reduced-motion: no-preference) { .pf-chip.pf-zoom:hover .pf-ring, .pf-chip.pf-zoom:focus-visible .pf-ring { animation: pfring 1.6s ease-out infinite; } }
@keyframes pfring { 0% { opacity: .85; transform: scale(1); } 70%, 100% { opacity: 0; transform: scale(1.55); } }
.pf-chip.pf-zoom:focus-visible .pf-chipbg { stroke: var(--ink); }

/* ---------- zoomed close-up ---------- */
html.pz-lock { overflow: hidden; }
.pz { position: fixed; inset: 0; z-index: 60; display: grid; place-items: center; padding: 16px; }
.pz-back { position: absolute; inset: 0; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(7px); -webkit-backdrop-filter: blur(7px); }
.pz-panel { position: relative; width: min(1060px, 100%, calc((100vh - 300px) * 1.786)); min-width: min(320px, 100%); background: var(--card); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 30px 90px rgba(0, 0, 0, .5); overflow: hidden; }
:root[data-theme="paper"] .pz-panel { box-shadow: 0 30px 80px rgba(19, 26, 44, .2); }
.pz-head { display: flex; align-items: center; gap: 12px; padding: 14px 14px 2px 18px; }
.pz-kt { width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center; background: var(--t); border: 1.4px solid var(--c); color: var(--c); flex: none; }
.pz-title { font: 600 clamp(16px, 2vw, 20px) var(--display); margin: 0; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.pz-title .pz-pg { color: var(--c); }
.pz-title .pz-sep { color: var(--muted); }
.pz-meter { display: inline-flex; align-items: flex-end; gap: 3px; margin-left: auto; color: var(--flow); padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; }
.pz-meter svg { margin-right: 6px; align-self: center; }
.pz-meter i { display: block; width: 3px; border-radius: 1px; background: var(--line); }
.pz-meter i.on { background: var(--flow); }
.pz-close { width: 40px; height: 40px; border-radius: 999px; border: 1px solid var(--line); background: none; color: var(--ink); display: grid; place-items: center; cursor: pointer; flex: none; transition: border-color .2s, color .2s; }
.pz-close:hover, .pz-close:focus-visible { border-color: var(--c); color: var(--c); outline: none; }
.pz-rail { display: flex; align-items: center; justify-content: center; padding: 4px 16px 0; }
.pz-rail i { width: clamp(12px, 4vw, 46px); height: 1.5px; background: var(--line); transition: background-color .3s; }
.pz-rail i.done { background: var(--c); }
.pz-rail button { width: 34px; height: 34px; border-radius: 999px; border: 1.3px solid var(--line); background: var(--card); color: var(--muted); display: grid; place-items: center; cursor: pointer; padding: 0; transition: border-color .25s, color .25s, background-color .25s, transform .25s; }
.pz-rail button:focus-visible { outline: 2px solid var(--c); outline-offset: 2px; }
.pz-rail button.done { border-color: var(--c); color: var(--c); }
.pz-rail button.on { border-color: var(--c); color: var(--bg); background: var(--c); transform: scale(1.12); }
.pz-scene { display: block; width: 100%; height: auto; }
.pz-titles { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.pz-proc { margin: 0; font: 500 11.5px var(--mono); color: var(--muted); letter-spacing: .02em; }
.pz-tabs { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; padding: 8px 16px 0; }
.pz-tabs button { display: inline-flex; align-items: center; gap: 8px; font: 500 13px var(--sans); color: var(--muted); background: none; border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px 5px 6px; cursor: pointer; transition: border-color .2s, color .2s; }
.pz-tabs button:focus-visible { outline: 2px solid var(--c); outline-offset: 2px; }
.pz-tabn { width: 20px; height: 20px; border-radius: 999px; display: grid; place-items: center; font: 600 11px var(--mono); background: var(--t); color: var(--c); }
.pz-tabs button.on { color: var(--ink); border-color: var(--c); }
.pz-tabs button.on .pz-tabn { background: var(--c); color: var(--bg); }
.pz-summary b { color: var(--ink); font-weight: 600; }
.pz-cell { font: 700 11px var(--mono); }
.pz-summary { margin: 8px auto 2px; max-width: 660px; padding: 0 16px; text-align: center; font: 400 13.5px/1.45 var(--sans); color: var(--muted); }
.pz-cap { display: flex; flex-direction: column; align-items: center; gap: 2px; min-height: 66px; padding: 10px 20px 0; text-align: center; }
.pz-capn { font: 500 10.5px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--c); }
.pz-capt { font: 600 15.5px var(--display); color: var(--ink); }
.pz-capd { max-width: 660px; font: 400 13px/1.45 var(--sans); color: var(--muted); }
@media (prefers-reduced-motion: no-preference) { .pz-cap.in { animation: pzcap .45s ease-out; } }
@keyframes pzcap { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* scene parts */
.pz-zone { stroke-width: 1.2; stroke-dasharray: 5 5; stroke-opacity: .5; }
.pz-link { fill: none; stroke-width: 1.4; stroke-opacity: .55; }
.pz-wire { fill: none; stroke-width: 1.4; stroke-dasharray: 5 6; stroke-opacity: .7; }
.pz-hand { fill: none; stroke-width: 1.6; stroke-dasharray: 1 7; stroke-linecap: round; }
.pz-bracket { fill: none; stroke-width: 1.1; stroke-dasharray: 3 4; stroke-opacity: .5; }
.pz-slot { fill: none; stroke-width: 1; stroke-dasharray: 2 3; stroke-opacity: .55; }
.pz-halo { opacity: .14; }
.pz-tap { fill: none; stroke-width: 1.6; }
.pz-sig { fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.pz-beam { stroke-width: 2; stroke-linecap: round; }
.pz-ecg, .pz-ecg-run { fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.pz-num { font: 600 21px var(--display); font-variant-numeric: tabular-nums; }
.pz-zlabel { font: 500 10.5px var(--mono); letter-spacing: .1em; }
.pz-label { font: 500 9.5px var(--mono); letter-spacing: .08em; fill: var(--muted); }
@media (prefers-reduced-motion: no-preference) { .pz-wire { animation: pfmarch 1.1s linear infinite; } }