/* The Field Guide as one book (2026-11-13): the dial along the top, chapter headers, chapter title cards in the deck, the
   planet and the contents on the cover. Phones first; the same pieces spread out on tablets and desktops. */
.fgd, .fgp, .fgt, .fgt-go, .fgs-h, .fg-pn, .fg-kick, .item.chap { --fi: var(--ink, #1c211b); --fb: var(--bench, #eceee6); --fq: var(--quiet, #5c6558); --fl: var(--line, #c9cdbf); --fs: var(--sans, 'IBM Plex Sans', system-ui, sans-serif); --fm: var(--mono, 'IBM Plex Mono', ui-monospace, monospace); }
.fg-groups { display: none; }

/* The dial. */
.fgd { position: sticky; top: 8px; z-index: 30; display: grid; grid-template-columns: minmax(0, 1fr); gap: 6px; padding: 8px 8px 9px; border-radius: 20px; background: rgba(236, 238, 230, .93); border: 1px solid var(--fl); box-shadow: 0 6px 22px rgba(28, 33, 27, .10); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); min-width: 0; font-family: var(--fs); }
.fgd-c { min-width: 0; }
.fgd-f, .fgd-r { min-width: 0; display: flex; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain; }
.fgd-f::-webkit-scrollbar, .fgd-r::-webkit-scrollbar { display: none; }
.fgd-f { gap: 2px; justify-content: space-between; }
@media (max-width: 640px) { .fgd-f { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 28px), transparent); padding-right: 18px; } .fgd-r { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 22px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 22px), transparent); padding-right: 16px; } }
.fgd-f a { flex: 1 0 auto; min-width: 58px; display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 4px 4px 3px; border-radius: 14px; color: var(--fi); text-decoration: none; font: 600 11.5px/1.15 var(--fs); white-space: nowrap; -webkit-tap-highlight-color: transparent; }
.fgd-f a:hover { background: rgba(28, 33, 27, .06); }
.fgd-f a:focus-visible, .fgd-r a:focus-visible { outline: 2px solid var(--fi); outline-offset: 1px; }
.fgd-i { width: 44px; height: 44px; border-radius: 50%; overflow: hidden; display: grid; place-items: center; background: #dfe2d6; box-shadow: 0 0 0 2px rgba(255, 255, 255, .9), 0 1px 4px rgba(0, 0, 0, .18); transition: box-shadow .2s, transform .2s; }
.fgd-i img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fgd-p .fgd-i { background: radial-gradient(circle at 35% 30%, #2a6a9a, #0a1b2c 75%); color: #cfe6ff; }
.fgd-p .fgd-i svg { width: 26px; height: 26px; }
.fgd-f a[aria-current] .fgd-i { box-shadow: 0 0 0 2.5px var(--fb), 0 0 0 5px var(--fc, var(--fi)); transform: scale(1.04); }
.fgd-f a[aria-current] .fgd-n { font-weight: 800; }
.fgd-r { gap: 6px; padding: 1px; }
.fgd-r[hidden] { display: none; }
.fgd-r a { flex: none; display: inline-flex; align-items: baseline; gap: 6px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--fl); background: rgba(255, 255, 255, .55); color: var(--fi); text-decoration: none; font: 500 13px/1.2 var(--fs); white-space: nowrap; }
.fgd-r a span { font: 500 11px var(--fm); opacity: .6; }
.fgd-r a[aria-current] { background: var(--fi); border-color: var(--fi); color: var(--fb); }
@media (min-width: 900px) { .fgd { top: 10px; padding: 10px 12px; } .fgd-f a { min-width: 72px; font-size: 12.5px; } .fgd-i { width: 52px; height: 52px; } .fgd-r { flex-wrap: wrap; overflow: visible; } }

/* A chapter's header. */
.fg-kick { margin: 0 0 4px; font: 500 11px/1.4 var(--fm); letter-spacing: .06em; text-transform: uppercase; color: var(--fq); }
.fg-kick a { color: inherit; }
.fg-pn { display: flex; justify-content: space-between; gap: 10px; margin-top: 12px; }
.fg-pn a { min-width: 0; max-width: 48%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 8px 13px; border-radius: 999px; border: 1px solid var(--fl); color: var(--fi); text-decoration: none; font: 600 13px/1.2 var(--fs); }
.fg-pn a:hover { background: rgba(28, 33, 27, .06); }
.fg-pn .fg-nx { margin-left: auto; }
.fg-pn a[hidden] { display: none; }

/* A chapter's title card, between the last card of one chapter and the first of the next. */
.item.chap { display: flex; }
.chapc { flex: 1; aspect-ratio: 9 / 16; box-sizing: border-box; border-radius: 20px; padding: 22px 20px 18px; display: flex; flex-direction: column; gap: 8px; color: #14170f; background: var(--fc); background: linear-gradient(165deg, color-mix(in srgb, var(--fc) 92%, #fff) 0%, var(--fc) 45%, color-mix(in srgb, var(--fc) 62%, #1c211b) 100%); box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .06); }
.chapk { margin: 0; font: 600 11px/1.4 var(--fm); letter-spacing: .07em; text-transform: uppercase; opacity: .75; }
.chapc h2 { margin: 0; font: 900 clamp(34px, 11vw, 46px)/.95 'Big Shoulders Display', var(--fs); text-transform: uppercase; letter-spacing: .005em; overflow-wrap: anywhere; }
.chapf { margin: 0; font: 600 14px/1.3 var(--fs); opacity: .8; }
.chapm { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 8px; }
.chapm img:only-child, .chapm img:nth-child(3):last-child { grid-column: span 2; aspect-ratio: 2 / 1; }
.chapm img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 12px; display: block; background: rgba(0, 0, 0, .1); }
.chapn { margin: auto 0 0; display: flex; justify-content: space-between; align-items: flex-end; font: 900 46px/1 'Big Shoulders Display', var(--fs); }
.chapn span { font-size: 38px; }
.item.chap.end .chapc { background: var(--fi); color: var(--fb); justify-content: center; text-align: center; }
.item.chap .chapgo a { display: inline-block; margin-top: 12px; padding: 12px 18px; border-radius: 999px; background: var(--fb); color: var(--fi); text-decoration: none; font: 700 15px var(--fs); }

/* The planet. */
.fgp { position: relative; overflow: hidden; display: grid; gap: 14px; padding: clamp(18px, 4vw, 34px) clamp(14px, 4vw, 34px) clamp(18px, 3vw, 28px); border-radius: 26px; color: #e8f0f6; font-family: var(--fs);
  background: radial-gradient(1.2px 1.2px at 12% 18%, #fffc, transparent 60%), radial-gradient(1px 1px at 82% 12%, #fff9, transparent 60%), radial-gradient(1.4px 1.4px at 68% 78%, #fffa, transparent 60%), radial-gradient(1px 1px at 28% 72%, #fff8, transparent 60%), radial-gradient(1px 1px at 92% 52%, #fff9, transparent 60%), radial-gradient(1.2px 1.2px at 6% 58%, #fff8, transparent 60%), radial-gradient(1px 1px at 46% 8%, #fff7, transparent 60%), radial-gradient(120% 90% at 50% 40%, #12304a 0%, #08131f 58%, #04080d 100%); }
.fgp-head { text-align: center; max-width: 60ch; margin: 0 auto; }
.fgp-head h2 { margin: 0; font: 800 clamp(24px, 5vw, 38px)/1.05 var(--fs); letter-spacing: -.01em; }
.fgp-head p { margin: 8px 0 0; color: #b6c7d4; font-size: 15px; line-height: 1.45; }
.fgp-stage { position: relative; width: min(100%, 680px); margin: 0 auto; }
.fgp-stage canvas { display: block; width: 100%; aspect-ratio: 1; touch-action: none; cursor: grab; border-radius: 50%; }
.fgp-stage canvas:active { cursor: grabbing; }
.fgp-stage canvas:focus-visible { outline: 2px solid #cfe6ff; outline-offset: 4px; }
.fgp-tip { position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%); width: min(94%, 400px); box-sizing: border-box; display: flex; gap: 12px; align-items: center; padding: 10px 40px 10px 10px; border-radius: 18px; background: rgba(255, 255, 255, .96); color: #1c211b; box-shadow: 0 12px 34px rgba(0, 0, 0, .45); }
.fgp-tip[hidden] { display: none; }
.fgp-tip img { width: 68px; height: 68px; border-radius: 12px; object-fit: cover; flex: none; }
.fgp-tip div { display: grid; gap: 3px; min-width: 0; }
.fgp-tip b { font: 700 17px/1.2 var(--fs); }
.fgp-tip span { font: 500 12.5px/1.3 var(--fs); color: #4a5249; display: flex; align-items: center; gap: 6px; }
.fgp-tip span::before { content: ''; width: 9px; height: 9px; border-radius: 50%; background: var(--fc); flex: none; }
.fgp .fgp-tip a { justify-self: start; margin-top: 3px; padding: 6px 12px; border-radius: 999px; background: #1c211b; color: #fff; text-decoration: none; font: 600 13px var(--fs); }
.fgp-tip small { font: 400 11px/1.3 var(--fs); color: #5c6558; overflow-wrap: anywhere; }
.fgp .fgp-tip small a { all: unset; color: inherit; text-decoration: underline; cursor: pointer; }
.fgp-tip button { position: absolute; top: 6px; right: 6px; width: 32px; height: 32px; border: 0; border-radius: 50%; background: transparent; font-size: 20px; line-height: 1; color: #4a5249; cursor: pointer; }
.fgp-keys { display: flex; flex-wrap: wrap; justify-content: center; gap: 7px; }
.fgp-keys button { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .07); color: #e8f0f6; font: 600 13px/1.1 var(--fs); cursor: pointer; }
.fgp-keys button i { width: 9px; height: 9px; border-radius: 50%; background: var(--fc); box-shadow: 0 0 8px var(--fc); }
.fgp-keys button span { font: 500 11px var(--fm); opacity: .65; }
.fgp-keys button[aria-pressed="true"] { background: #e8f0f6; color: #0b1520; border-color: #e8f0f6; }
.fgp-keys button:focus-visible { outline: 2px solid #cfe6ff; outline-offset: 2px; }

/* Start reading, the contents, and the twelve to start with. */
.fgt-go { margin: 0; text-align: center; }
.fgt-go a.fgt-read { display: inline-flex; gap: 10px; align-items: center; padding: 14px 26px; border-radius: 999px; background: var(--fi); color: var(--fb); text-decoration: none; font: 700 17px var(--fs); box-shadow: 0 6px 18px rgba(28, 33, 27, .22); }
.fgt h2, .fgs-h { margin: 0; font: 800 clamp(22px, 4vw, 30px)/1.1 var(--fs); color: var(--fi, #1c211b); }
.fgt-f { margin-top: 18px; }
.fgt-f h3 { margin: 0; display: flex; align-items: center; gap: 9px; font: 700 16px/1.2 var(--fs); }
.fgt-f h3::before { content: ''; width: 12px; height: 12px; border-radius: 50%; background: var(--fc); box-shadow: 0 0 0 3px color-mix(in srgb, var(--fc) 30%, transparent); }
.fgt-g { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(150px, 44vw), 1fr)); gap: 14px 12px; margin-top: 10px; }
.fgt a.fgt-t { display: grid; gap: 3px; align-content: start; color: var(--fi); text-decoration: none; min-width: 0; }
.fgt-i { position: relative; display: block; aspect-ratio: 1; border-radius: 16px; overflow: hidden; background: #dfe2d6; box-shadow: 0 1px 4px rgba(0, 0, 0, .16); }
.fgt-i img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .35s ease; }
.fgt-t:hover .fgt-i img { transform: scale(1.05); }
.fgt-t:focus-visible { outline: 2px solid var(--fi); outline-offset: 3px; border-radius: 16px; }
.fgt-c { position: absolute; right: 8px; bottom: 8px; padding: 3px 9px; border-radius: 999px; background: rgba(12, 14, 11, .68); color: #fff; font: 600 12px var(--fm); }
.fgt-x { margin-top: 4px; font: 500 10.5px/1.3 var(--fm); letter-spacing: .05em; text-transform: uppercase; color: var(--fq); }
.fgt-n { font: 600 15px/1.25 var(--fs); overflow-wrap: anywhere; }
.fgs-h { margin-bottom: -8px; }