/* Shell */
#topbar { display: flex; align-items: center; gap: var(--s-5); height: 72px; padding: 0 var(--safe); }
#topbar[hidden] { display: none; }
#systems { flex: 1; display: flex; }
.brand { display: inline-flex; align-items: center; gap: var(--s-3); margin: 0; color: var(--ink); }
.brand .wordmark { font-size: var(--t-3); }
.brand--large .wordmark { font-size: var(--t-5); }
#main { padding: 0 var(--safe) calc(64px + var(--s-7)); outline: none; }
#view > * { animation: rise var(--d-med) var(--ease); }
#view[hidden], #connect-screen[hidden] { display: none; }

/* Connect */
.connect { display: grid; grid-template-columns: 3fr 2fr; gap: var(--s-8); align-items: center; min-height: calc(100vh - 160px); position: relative; }
.connect__intro { align-self: center; }
.lede { font-family: var(--font-display); font-size: var(--t-3); color: var(--ink-2); }
.connect__form { width: 100%; max-width: 480px; padding: var(--s-6); background: var(--surface-1); border: 1px solid var(--line); border-radius: var(--r-3); }
.connect__form h1 { margin-bottom: var(--s-2); }
.connect__form .btn--primary { width: 100%; }
.links { display: flex; flex-wrap: wrap; gap: var(--s-3); margin: var(--s-3) 0 0; }
#connect-banner { margin-bottom: var(--s-4); }

/* Library */
.section-head { display: flex; justify-content: space-between; align-items: center; margin: var(--s-6) 0 var(--s-4); }
.hero { display: flex; gap: var(--s-6); align-items: flex-end; margin: var(--s-4) 0; animation: fade 180ms var(--ease); }
.hero__cover { flex: none; width: 240px; aspect-ratio: 3 / 4; border-radius: var(--r-2); overflow: hidden; border: 1px solid var(--line); }
.hero__body .title { font-size: var(--t-5); }
.row-actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-4); }
.cover { display: block; width: 100%; height: 100%; }
.cover__letters { font: 600 96px var(--font-display); fill: var(--ink); fill-opacity: .92; }
.grid { --card-w: clamp(160px, 14vw, 260px); display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--card-w), 1fr)); gap: var(--s-5); padding: var(--s-2); }
.grid__row { display: contents; }
.grid > [role="row"] > [role="gridcell"] { min-width: 0; }
.card { position: relative; display: block; width: 100%; padding: 0; background: none; border: 0; border-radius: var(--r-2); text-align: left; transition: transform 180ms var(--ease); }
.card__art { position: relative; display: block; aspect-ratio: 3 / 4; border-radius: var(--r-2); overflow: hidden; background: var(--surface-1); box-shadow: inset 0 0 0 1px var(--line); }
.card__title { display: block; margin-top: var(--s-2); font-size: var(--t-1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card__sub { display: block; font-size: var(--t-1); color: var(--ink-2); }
.card:focus-visible, .card.is-focus { transform: scale(1.05); }
.card:focus-visible .card__title { font-size: var(--t-2); font-weight: 600; }
.card:active { transform: scale(.98); }
.card--add .card__art { display: grid; place-content: center; justify-items: center; gap: var(--s-2); border: 2px dashed var(--line); box-shadow: none; text-align: center; }
.plus { position: relative; width: 32px; height: 32px; }
.plus::before, .plus::after { content: ""; position: absolute; background: var(--ink); border-radius: 2px; }
.plus::before { left: 14px; top: 0; width: 4px; height: 32px; }
.plus::after { top: 14px; left: 0; height: 4px; width: 32px; }
.empty { max-width: 560px; margin: var(--s-9) auto; text-align: center; }
.empty h2 { margin-bottom: var(--s-3); }
.note { margin-top: var(--s-4); }

/* Detail */
.detail { display: flex; gap: var(--s-7); align-items: flex-start; padding-top: var(--s-7); }
.detail__cover { flex: none; width: min(300px, 30vw); aspect-ratio: 3 / 4; border-radius: var(--r-2); overflow: hidden; border: 1px solid var(--line); }
.detail__body .title { font-size: var(--t-5); }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: var(--s-2) var(--s-5); margin-top: var(--s-6); }
.facts dt { color: var(--ink-2); } .facts dd { margin: 0; }

/* Setup */
.setup__head { display: flex; justify-content: space-between; align-items: baseline; margin: var(--s-4) 0 var(--s-5); }
.setup__cols { display: grid; grid-template-columns: 3fr 2fr; gap: var(--s-6); margin-bottom: var(--s-5); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--s-4); }
.step, .explain { padding: var(--s-5); background: var(--surface-1); border: 1px solid var(--line); border-radius: var(--r-3); }
.step h2, .explain h2 { margin-bottom: var(--s-3); }

/* Boot */
.boot { position: fixed; inset: 0; z-index: 45; display: flex; align-items: center; padding: 0 var(--safe); background: rgb(14 18 16 / .94); animation: fade var(--d-med) var(--ease); }
.boot__inner { width: min(560px, 100%); display: grid; gap: var(--s-3); }
.boot__inner .title { font-size: var(--t-4); }
.boot__gear { position: relative; width: 96px; height: 96px; color: var(--ink); }
.boot__gear .icon { position: absolute; inset: 0; }
.boot__gear .icon:first-child { animation: spin 6s linear infinite; }
.boot--failed .boot__gear .icon:first-child { animation: none; }
.boot--failed .boot__gear .icon:last-child { transform: rotate(20deg); }
[data-motion="reduce"] .boot__gear .icon:first-child, [data-perf="low"] .boot__gear .icon:first-child { animation: none; }
.boot__status { margin: 0; font-variant-numeric: tabular-nums; }

/* Game layer */
#game { position: fixed; inset: 0; z-index: 20; background: #000; }
#game[hidden] { display: none; }
#core { width: 100%; height: 100%; border: 0; display: block; }
#chord { position: fixed; z-index: 30; top: var(--s-5); right: var(--s-5); }
.chord__track, .chord__fill { fill: none; stroke-width: 4; }
.chord__track { stroke: var(--line); }
.chord__fill { stroke: var(--accent); stroke-linecap: round; transform: rotate(-90deg); transform-origin: 50% 50%; stroke-dasharray: calc(var(--p, 0) * 100.5) 100.5; }

/* Settings */
.settings > h1 { margin: var(--s-4) 0 var(--s-5); }
.settings__cols { display: grid; grid-template-columns: 240px 1fr; gap: var(--s-6); }
.pane { min-width: 0; max-width: 720px; }
.pane h2 { margin-bottom: var(--s-4); }
.map { width: 100%; border-collapse: collapse; margin: var(--s-4) 0; font-size: var(--t-1); }
.map th, .map td { text-align: left; padding: var(--s-2) var(--s-3); border-bottom: 1px solid var(--line); }
.map th { color: var(--ink-2); font-weight: 500; }

/* Phones */
@media (max-width: 959px) {
  .connect { grid-template-columns: 1fr; gap: var(--s-5); min-height: 0; padding-top: var(--s-5); }
  .brand--large .wordmark { font-size: var(--t-4); }
  .hero { align-items: center; gap: var(--s-4); }
  .hero__cover { width: 72px; }
  .hero__body .title { font-size: var(--t-3); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .detail { flex-direction: column; gap: var(--s-5); padding-top: var(--s-4); }
  .detail__cover { width: 60%; }
  .detail__body .title { font-size: var(--t-4); }
  .setup__cols, .settings__cols { grid-template-columns: 1fr; }
  .panels { grid-template-columns: 1fr; }
  .dialog__actions { flex-direction: column-reverse; }
  .dialog__actions .btn { width: 100%; }
  .dialog--sheet { left: 0; max-width: none; border-radius: var(--r-3) var(--r-3) 0 0; top: auto; max-height: 90vh; }
  #topbar { gap: var(--s-3); }
  #sync-chip span { display: none; }
  .tabs--vertical { flex-direction: row; overflow-x: auto; }
  .tab--side { border-left: 0; border-bottom: 4px solid transparent; }
  .tab--side[aria-selected="true"] { border-bottom-color: var(--accent); }
}