/* ===== Academy Hub: the console home screen (CARTRIDGE design system, tokens in /theme.css) ===== */
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; min-height: 100dvh; color: var(--k-text); font: 16px/1.55 var(--k-body);
  background: var(--k-dots), var(--k-bg); -webkit-font-smoothing: antialiased; }
a { color: var(--k-link); text-underline-offset: 2px; }
.muted { color: var(--k-muted); } .small { font-size: .88rem; }
[hidden] { display: none !important; }
.skip-link { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--k-coin); color: var(--k-on-accent); padding: 10px 14px; border: var(--k-border); border-radius: var(--k-r-sm); font-weight: 700; }
.skip-link:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--k-coin); outline-offset: 2px; }
[data-theme="light"] :focus-visible { outline-color: var(--k-link); }

/* ---------- top bar: the console's status strip ---------- */
.hub-top { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 10px; min-height: calc(60px + var(--sa-t)); padding: var(--sa-t) max(12px, var(--sa-r)) 0 max(12px, var(--sa-l));
  background: var(--k-chrome); border-bottom: var(--k-border); }
.hub-top::after { content: ""; position: absolute; left: 0; right: 0; bottom: -7px; height: 5px; background: var(--k-stripes); border-bottom: var(--k-border); pointer-events: none; }
@media (min-width: 760px) { .hub-top { padding-left: 20px; padding-right: 20px; } }
.hub-brand { display: flex; align-items: center; gap: 10px; min-width: 0; white-space: nowrap; }
.hub-brand img { width: 40px; height: 40px; border-radius: 10px; flex: none; border: var(--k-border); box-shadow: var(--k-drop-sm); }
.hub-word { font-family: var(--k-display); font-size: 1.9rem; font-weight: 400; letter-spacing: .03em; line-height: 1; text-transform: uppercase; }
.hub-word b { font-weight: 400; }
.hub-word i { font-style: normal; font-size: .72em; font-weight: 400; padding: 1px 7px 2px; margin-left: 2px; vertical-align: 2px; background: var(--k-coin); color: var(--k-on-accent); border: var(--k-border); border-radius: 6px; }
.hub-led { width: 10px; height: 10px; border-radius: 50%; background: var(--k-leaf); border: 2px solid var(--k-line); box-shadow: 0 0 10px var(--k-leaf); flex: none; animation: led 2.4s ease-in-out infinite; }
@keyframes led { 50% { opacity: .45; box-shadow: none; } }
.hub-top-right { margin-left: auto; display: flex; gap: 8px; align-items: center; min-width: 0; }
.hub-chip, .hub-icon { min-height: 44px; min-width: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 0 14px; color: var(--k-text); text-decoration: none;
  background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm); font: 400 1.25rem var(--k-display); letter-spacing: .03em; cursor: pointer; max-width: 46vw;
  transition: transform .08s, box-shadow .08s; }
.hub-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hub-icon { padding: 0; font-size: 1.2rem; }
.hub-chip:hover, .hub-icon:hover { background: var(--k-inset); }
.hub-chip:active, .hub-icon:active { transform: translate(2px, 2px); box-shadow: none; }

/* ---------- page ---------- */
.hub-main { padding: 26px max(14px, var(--sa-r)) 28px max(14px, var(--sa-l)); max-width: 1180px; margin: 0 auto; outline: none; }
@media (min-width: 760px) { .hub-main { padding: 34px 28px 36px; } }
.hub-boot { margin: 0 0 22px; }
.hub-eyebrow { margin: 0 0 6px; font: 400 clamp(2rem, 6.4vw, 3.2rem)/1 var(--k-display); letter-spacing: .02em; text-transform: uppercase; }
.hub-eyebrow .blink { color: var(--k-brand-text); display: inline-block; animation: blink 1.1s steps(2, jump-none) infinite; }
[data-theme="dark"] .hub-eyebrow .blink { color: var(--k-coin); }
@keyframes blink { 50% { opacity: .25; } }
.hub-hello { margin: 0; color: var(--k-muted); font-size: 1.05rem; max-width: 62ch; }

/* ---------- the two cartridges ---------- */
.hub-apps { display: grid; gap: 26px 22px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .hub-apps { grid-template-columns: 1fr 1fr; } }
.app-card { --cart: var(--k-coin); position: relative; display: flex; flex-direction: column; gap: 14px; min-width: 0; padding: 0 16px 16px; color: var(--k-text);
  background: var(--k-panel); border: var(--k-border); border-radius: 6px 6px var(--k-r) var(--k-r); box-shadow: var(--k-drop-lg); transition: transform .12s, box-shadow .12s; }
.app-card.it { --cart: var(--k-it); }
.app-card.ai { --cart: var(--k-ai); }
@media (hover: hover) { .app-card:hover { transform: translate(-2px, -3px); box-shadow: 8px 9px 0 var(--k-drop); } }
/* moulded grip ridges across the top of the shell */
.cart-ridge { display: flex; gap: 5px; justify-content: center; align-items: flex-end; height: 22px; margin: 0 -16px; padding: 0 16px; border-bottom: var(--k-border); background: var(--k-inset); border-radius: 4px 4px 0 0; }
.cart-ridge i { flex: 1; max-width: 46px; height: 8px; margin-bottom: 5px; border-radius: 3px; background: var(--k-hair); }
/* "LAST PLAYED" becomes a lit slot LED */
.app-card.last::before { content: "● LAST PLAYED"; position: absolute; right: 12px; top: -13px; z-index: 2; font: 400 1rem/1 var(--k-display); letter-spacing: .08em; padding: 4px 9px 5px;
  background: var(--k-leaf); color: var(--k-on-accent); border: var(--k-border); border-radius: 999px; box-shadow: var(--k-drop-sm); }
/* the printed label */
.cart-label { position: relative; padding: 16px 14px 14px; background: var(--cart); color: var(--k-on-accent); border: var(--k-border); border-radius: var(--k-r-sm); overflow: hidden; }
.cart-label::after { content: ""; position: absolute; inset: 0; background: radial-gradient(rgba(27, 25, 32, .16) 1.2px, transparent 1.6px) 0 0 / 9px 9px; pointer-events: none;
  -webkit-mask-image: linear-gradient(115deg, transparent 45%, #000); mask-image: linear-gradient(115deg, transparent 45%, #000); }
.cart-stripes { position: absolute; left: 0; right: 0; top: 0; height: 7px; background: var(--k-stripes); border-bottom: var(--k-border); }
.ac-head { position: relative; z-index: 1; display: flex; gap: 12px; align-items: flex-start; padding-top: 4px; }
.ac-ic { flex: none; width: 62px; height: 62px; display: grid; place-items: center; font-size: 2.1rem; line-height: 1; background: var(--k-cream); border: var(--k-border); border-color: var(--k-black); border-radius: var(--k-r-sm); box-shadow: 3px 3px 0 var(--k-black); }
.cart-no { margin: 0 0 2px; font: 400 1.02rem/1.2 var(--k-display); letter-spacing: .1em; text-transform: uppercase; opacity: .8; }
.app-card h2 { margin: 0 0 6px; font: 400 clamp(2.2rem, 6vw, 3rem)/.95 var(--k-display); letter-spacing: .02em; text-transform: uppercase; }
.ac-sub { margin: 0; font-size: .9rem; font-weight: 500; line-height: 1.45; }

/* the save file: an LCD read-out */
.cart-save { position: relative; padding: 12px 14px; background: var(--k-screen) ; color: var(--k-phos); border: var(--k-border); border-radius: var(--k-r-sm); font-family: var(--k-display); }
.cart-save::after { content: ""; position: absolute; inset: 0; border-radius: inherit; background: var(--k-scan); pointer-events: none; }
.cart-save-h { margin: 0 0 6px; font-size: 1rem; font-weight: 400; letter-spacing: .14em; text-transform: uppercase; color: var(--k-phos-dim); }
.cart-save-h::before { content: "▮ "; color: var(--k-phos-hot); }
.ac-stats { margin: 0; }
.ac-new { margin: 0 0 8px; color: var(--k-phos-dim); font-family: var(--k-body); }
.ac-lv { display: flex; align-items: center; gap: 10px; font-size: 1.6rem; font-weight: 400; line-height: 1; }
.ac-lv b { flex: none; padding: 2px 9px 4px; background: var(--k-coin); color: var(--k-on-accent); border-radius: 6px; font-weight: 400; }
.ac-lv .bar { flex: 1; height: 16px; padding: 2px; background: #000; border: 2px solid var(--k-phos-dim); border-radius: 4px; }
.ac-lv .bar i { display: block; height: 100%; min-width: 0; border-radius: 1px;
  background: repeating-linear-gradient(90deg, var(--k-phos-hot) 0 6px, transparent 6px 8px); }
.ac-lv .small { font-size: 1.4rem; white-space: nowrap; color: var(--k-coin); }
.ac-facts { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 1.3rem; font-weight: 400; letter-spacing: .02em; }

/* ---------- buttons: chunky, pressable ---------- */
.ac-actions, .row { display: flex; flex-wrap: wrap; gap: 10px; }
.ac-actions { margin-top: auto; }
.hbtn { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 0 16px; cursor: pointer; text-decoration: none;
  font: 400 1.3rem var(--k-display); letter-spacing: .03em; color: var(--k-text); background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r-sm); box-shadow: var(--k-drop-sm);
  transition: transform .08s, box-shadow .08s, background .08s; }
.hbtn:hover { background: var(--k-inset); }
.hbtn.primary { background: var(--k-coin); color: var(--k-on-accent); }
.hbtn.primary:hover { background: #ffd564; }
.ac-actions .hbtn.primary { flex: 1 1 130px; font-size: 1.5rem; min-height: 50px; box-shadow: var(--k-drop-md); }
.hbtn:active, .ac-actions .hbtn.primary:active { transform: translate(2px, 2px); box-shadow: none; }
.hbtn:disabled { opacity: .65; cursor: default; transform: none; box-shadow: var(--k-drop-sm); }

/* ---------- panels: memory card + system ---------- */
.hub-panels { display: grid; gap: 22px; margin-top: 30px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .hub-panels { grid-template-columns: 1fr 1fr; } }
.panel { position: relative; padding: 0 16px 14px; background: var(--k-panel); border: var(--k-border); border-radius: var(--k-r); box-shadow: var(--k-drop-md); min-width: 0; }
.panel h3 { margin: 0 -16px 12px; padding: 10px 16px 11px; font: 400 1.5rem/1.1 var(--k-display); letter-spacing: .05em; text-transform: uppercase;
  background: var(--k-inset); border-bottom: var(--k-border); border-radius: calc(var(--k-r) - 2px) calc(var(--k-r) - 2px) 0 0; }
.panel p { margin: 9px 0; }
.howto { margin: 4px 0; border: 2px dashed var(--k-hair); border-radius: var(--k-r-sm); padding: 0 12px; }
.howto summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; font: 400 1.25rem var(--k-display); letter-spacing: .02em; color: var(--k-link); }
.howto ol { margin: 4px 0 10px; padding-left: 1.3em; }
.howto li { margin: 5px 0; }
.hub-foot { margin-top: 26px; padding-top: 14px; border-top: 2px dashed var(--k-hair); }

/* unfolded and roomy: bigger cartridges */
@media (min-width: 760px) and (min-height: 600px) { .app-card { padding: 0 20px 20px; gap: 16px; } .cart-ridge { margin: 0 -20px; height: 26px; } .cart-label { padding: 20px 18px 18px; } .ac-ic { width: 76px; height: 76px; font-size: 2.6rem; } }
/* two reported viewport segments (fold hinge): one academy per side */
@media (horizontal-viewport-segments: 2) {
  .hub-apps, .hub-panels { grid-template-columns: 1fr 1fr; column-gap: calc(env(viewport-segment-left 1 0, 0px) - env(viewport-segment-right 0 0, 0px) + 28px); }
}
@media (max-width: 440px) { .hub-led, .hub-word i { display: none; } .hub-word { font-size: 1.6rem; } .hub-chip { padding: 0 10px; max-width: none; flex: none; } }
@media (max-width: 380px) { .hub-word { font-size: 1.45rem; } .hub-brand { gap: 7px; } .hub-brand img { width: 34px; height: 34px; } .ac-ic { width: 52px; height: 52px; font-size: 1.7rem; } .hub-chip { padding: 0 10px; } }
@media (max-width: 330px) { .hub-word i { display: none; } }