.hero { padding-block: var(--sp-8) var(--section-main); }
.hero .intro { max-width: 64ch; }
/* the deck's coloured words */
.c-identity, .c-story, .c-experience { color: var(--link); } .c-brand, .c-proof { color: var(--focus); } .c-trust { color: var(--text-heading); } .c-inconsistency { color: #ff5a5a; }
:root[data-theme="light"] .c-inconsistency { color: #7a1b1b; }   /* AA on the second ground, 2026-09-29 */
.fcap b { font-weight: 500; }
/* a slide from the deck: the deck's tan ground and ink, 16:9, its own coloured words */
.slide .sl { aspect-ratio: 16 / 9; background: var(--background-2); color: var(--text-heading); border: var(--border-w) solid var(--border-subtle); border-radius: var(--radius-main); padding: clamp(20px, 4vw, 64px) clamp(20px, 5vw, 80px); display: grid; align-content: center; gap: clamp(14px, 2.4vw, 36px); font-family: var(--f-01); overflow: hidden; }
.slide .q { margin: 0; font-weight: 500; font-size: clamp(20px, 2.9vw, 42px); line-height: 1.2; text-align: center; }
.slide .two { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px, 4vw, 64px); }
.slide .two > div { display: grid; gap: 8px; color: var(--text); font-size: clamp(14px, 1.8vw, 26px); line-height: 1.35; }
.slide .two b { font-weight: 700; font-size: clamp(22px, 3vw, 44px); letter-spacing: .02em; margin-bottom: 4px; }
.slide .two span b { font-size: inherit; margin: 0; }
.slide .eq { display: flex; align-items: center; justify-content: center; gap: clamp(10px, 2vw, 28px); font-family: var(--f-01); font-weight: 500; font-size: clamp(16px, 2.7vw, 38px); letter-spacing: .04em; }
.slide .eq .frac { display: grid; justify-items: center; gap: 6px; }
.slide .eq .den { border-top: 2px solid var(--border); padding-top: 6px; width: 100%; text-align: center; }
.slide .defs { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; justify-content: center; font-size: clamp(14px, 1.8vw, 25px); }
.slide .defs b { font-weight: 500; }
.slide .ipod { grid-template-columns: 1.4fr 1fr; align-items: center; gap: clamp(16px, 3vw, 48px); }
.slide .ipod img { width: 100%; height: auto; display: block; border-radius: 4px; }
.slide .callouts { list-style: none; margin: 0; padding: 0; display: grid; gap: clamp(10px, 1.8vw, 26px); font-size: clamp(13px, 1.45vw, 21px); line-height: 1.35; }
.slide .callouts li { display: grid; gap: 2px; } .slide .callouts b { font-weight: 500; }
.slide .big { margin: 0; font-weight: 500; font-size: clamp(18px, 3.1vw, 46px); line-height: 1.25; text-align: center; }
.slide figcaption { margin-top: 10px; font-size: var(--text-s); color: var(--text); }
/* the formula, site-side */
.fwrap { grid-column: 1 / 13; margin-top: var(--sp-3); display: grid; gap: var(--sp-4); }
.formula { display: flex; align-items: center; justify-content: center; gap: var(--sp-5); flex-wrap: wrap; font-family: var(--f-01); font-weight: 500; letter-spacing: -.01em; padding: var(--sp-7) var(--sp-5); border: var(--border-w) solid var(--border-subtle); border-radius: var(--radius-main); background: var(--background-2); }
.formula .lhs { color: var(--focus); font-size: clamp(28px, 3.4vw, 52px); }
.formula .eq { color: var(--text); font-size: clamp(28px, 3.4vw, 52px); }
.formula .frac { display: grid; justify-items: center; gap: 10px; }
.formula .num { display: flex; align-items: center; gap: var(--sp-3); font-size: clamp(20px, 2.6vw, 40px); flex-wrap: wrap; justify-content: center; }
.formula .num b { font-weight: 500; } .formula .num i { font-style: normal; color: var(--text); }
.formula .den { border-top: 2px solid var(--border); padding-top: 10px; width: 100%; text-align: center; font-size: clamp(18px, 2.2vw, 34px); }
.fcap { margin: 0; color: var(--text); max-width: 70ch; }
/* the archetype wall under the hub hero */
.archwall { overflow: hidden; border-top: var(--border-w) solid var(--border-subtle); }
.archwall .wrap { display: grid; grid-template-columns: repeat(12, 1fr); gap: 8px; padding-block: var(--sp-4); }
.archwall img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 4px; display: block; }
/* lesson cards, each with a thumbnail */
.lessons { grid-column: 1 / 13; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); margin-top: var(--sp-3); }
.lessons.two { grid-template-columns: repeat(2, 1fr); }
.lesson { border: var(--border-w) solid var(--border-subtle); border-radius: var(--radius-main); overflow: hidden; display: grid; gap: var(--sp-2); align-content: start; grid-template-columns: 1fr auto; padding: 0 var(--sp-4) var(--sp-4); text-decoration: none; color: inherit; transition: border-color .2s ease, transform .3s cubic-bezier(.2,.7,.2,1); }
.thumb { grid-column: 1 / 3; margin: 0 calc(-1 * var(--sp-4)) var(--sp-2); aspect-ratio: 16 / 9; background: #aaabb5; display: grid; overflow: hidden; border-bottom: var(--border-w) solid var(--border-subtle); }
.thumb > img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .pair { display: grid; grid-template-columns: 1fr 1fr; height: 100%; }
.thumb .pair img { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb.arch { grid-template-columns: repeat(3, 1fr); } .thumb.arch img { width: 100%; height: 100%; object-fit: cover; }
.thumb.words { place-content: center; gap: 4px; text-align: center; font-weight: 700; font-size: clamp(20px, 2vw, 28px); letter-spacing: .04em; text-transform: uppercase; }
.thumb.words { background: var(--background-2); }
.thumb.scales { align-content: center; gap: 22px; padding: 0 18%; background: var(--background-2); }
.thumb.scales i { display: block; width: 100%; height: 3px; background: var(--border); border-radius: 2px; position: relative; }
.thumb.scales i::after { content: ""; position: absolute; top: -7px; left: calc(var(--x) * 100%); width: 17px; height: 17px; border-radius: 50%; background: #5f6cde; border: 3px solid var(--background-2); transform: translateX(-50%); }
.lesson .n { font-family: var(--f-03); font-size: var(--h3); color: var(--link); line-height: 1; letter-spacing: -.02em; }
.lesson .min { color: var(--text); align-self: start; padding-top: 6px; }
.lesson .h5, .lesson p, .lesson .link { grid-column: 1 / 3; }
.lesson .h5 { display: block; margin-top: var(--sp-2); }
.lesson p { margin: 0; color: var(--text); font-size: var(--text-s); }
.lesson .link { padding-bottom: 0; margin-top: auto; }
a.lesson:hover { border-color: var(--link); transform: translateY(-4px); }
.lesson.soon .thumb { filter: saturate(.7); } .lesson.soon .min { color: var(--link); }
/* the five elements: the Venn, then a before/after pair */
.els { grid-column: 1 / 13; display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--sp-4); margin-top: var(--sp-3); }
.el { border-top: var(--border-w) solid var(--border); padding-top: var(--sp-4); display: grid; gap: var(--sp-2); grid-template-rows: auto auto 1fr auto auto; }
.el > .icon { font-size: 32px; color: var(--link); }
.el .tt { display: block; } .el p { margin: 0; color: var(--text); font-size: var(--text-s); }
.venn { width: 100%; height: auto; margin-top: var(--sp-2); }
.venn circle { fill: color-mix(in srgb, var(--text-heading) 5%, transparent); stroke: var(--border); stroke-width: 1; }
.venn text { font-family: var(--f-03); font-size: 19px; letter-spacing: .08em; text-transform: uppercase; fill: var(--text-heading); }
.venn .heart { fill: var(--link); }
.el .pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.el .pair img { width: 100%; height: auto; aspect-ratio: 480 / 409; display: block; border-radius: 4px; }
/* how */
.how { grid-column: 1 / 13; margin: var(--sp-3) 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.how li { border-top: var(--border-w) solid var(--border-subtle); padding-top: var(--sp-3); display: grid; gap: var(--sp-2); align-content: start; }
.how .n { font-family: var(--f-03); font-size: var(--h3); color: var(--link); line-height: 1; letter-spacing: -.02em; }
.how .t { color: var(--text-heading); font-weight: 500; }
.how p { margin: 0; color: var(--text); font-size: var(--text-s); } .how p a { color: var(--link); }
/* lesson 1 devices */
.pairwords { grid-column: 1 / 13; display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); margin-top: var(--sp-3); }
.side { border-top: 2px solid var(--link); padding-top: var(--sp-4); display: grid; gap: var(--sp-3); align-content: start; }
.side .h4 { max-width: 22ch; }
.side ul { list-style: none; margin: var(--sp-2) 0 0; padding: 0; }
.side li { display: grid; grid-template-columns: 24px 1fr; gap: var(--sp-3); align-items: start; padding: 12px 0; border-top: var(--border-w) solid var(--border-subtle); color: var(--text-heading); }
.side li .icon { color: var(--link); font-size: 22px; font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24; }
.note { grid-column: 1 / 9; margin: var(--sp-2) 0 0; color: var(--text-heading); font-size: var(--text-l); border-left: 2px solid var(--link); padding-left: var(--sp-4); }
.terms, .worked { grid-column: 1 / 13; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); margin-top: var(--sp-2); }
.term, .w { border-top: var(--border-w) solid var(--border-subtle); padding-top: var(--sp-3); display: grid; gap: var(--sp-2); align-content: start; }
.term .k, .w .k { font-family: var(--f-03); font-size: var(--text-xs); letter-spacing: .12em; text-transform: uppercase; }
.term p, .w p { margin: 0; color: var(--text); font-size: var(--text-s); }
.ladder { grid-column: 1 / 13; display: flex; align-items: center; gap: var(--sp-4); flex-wrap: wrap; margin-top: var(--sp-3); }
.ladder .step { display: grid; gap: 4px; padding: var(--sp-4); border: var(--border-w) solid var(--border-subtle); border-radius: var(--radius-main); flex: 1 1 160px; }
.ladder .step b { font-weight: 500; } .ladder .step i { font-style: normal; color: var(--text); font-size: var(--text-s); }
.ladder > .icon { color: var(--link); }
.mon { grid-column: 1 / 13; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); margin-top: var(--sp-3); }
.mon .card > .icon { font-size: 32px; color: var(--link); } .mon .h5 { display: block; } .mon p { margin: 0; color: var(--text); font-size: var(--text-s); }
@media (max-width: 1100px) { .els { grid-template-columns: repeat(3, 1fr); } .terms, .worked { grid-template-columns: repeat(2, 1fr); } .lessons { grid-template-columns: repeat(2, 1fr); } .archwall .wrap { grid-template-columns: repeat(6, 1fr); } }
@media (max-width: 860px) { .pairwords, .mon, .how, .note { grid-template-columns: 1fr; grid-column: 1 / 13; } .ladder > .icon { display: none; } .lessons.two { grid-template-columns: 1fr; } .slide .sl { aspect-ratio: auto; } .slide .ipod { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .els, .lessons, .terms, .worked { grid-template-columns: 1fr; } .formula { padding: var(--sp-4); } .slide .two { grid-template-columns: 1fr; } .archwall .wrap { grid-template-columns: repeat(4, 1fr); } }