/* ===========================================================================
   house-summary.css — unit summary pages (house-summary.js)
   =========================================================================== */
.us-k { margin: 0 0 6px; font: 600 .7rem/1.2 var(--h-sans) !important; letter-spacing: .18em; text-transform: uppercase; color: var(--unit) !important; }
.us-k2 { margin-top: 18px; }
html body .us-card h2, html body .us-head h2 { margin: 0 0 12px; font: 600 1.35rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; text-wrap: balance; }
.us-head { margin: 26px 0 12px; }
.us-sec { scroll-margin-top: 140px; }
.us-note { color: var(--h-text-2); line-height: 1.6; }
.us-note b { color: var(--h-text); }
.us-jump { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 18px; }
html body .us-jump a { padding: 8px 14px; border: 1px solid var(--h-line); border-radius: var(--h-pill); background: var(--h-panel); color: var(--h-text-2); font: 600 .8rem/1 var(--h-sans); text-decoration: none; transition: border-color .2s, color .2s; }
html body .us-jump a:hover { border-color: rgba(242,191,94,.55); color: var(--h-text); }

/* 1 standing */
.us-stand { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; margin: 6px 0 14px; }
html body .us-tile { display: grid; gap: 3px; padding: 12px 14px; border: 1px solid var(--h-line); border-radius: 14px; background: var(--h-panel-2); color: var(--h-text); text-decoration: none; transition: border-color .2s, transform .2s; }
html body .us-tile:hover { border-color: rgba(242,191,94,.55); transform: translateY(-1px); }
.us-tile-num { font: 700 .8rem/1 var(--h-sans); color: var(--h-muted); }
.us-tile-pct { font: 700 1.6rem/1.1 var(--h-display); color: var(--h-text); }
.us-tile.is-strong .us-tile-pct { color: var(--h-good); }
.us-tile.is-ok .us-tile-pct { color: var(--h-gold-1); }
.us-tile.is-weak .us-tile-pct { color: #F0846E; }
.us-tile.is-none .us-tile-pct { color: var(--h-muted); }
.us-tile.is-weak { border-color: rgba(240,132,110,.45); }
.us-tile-meta { font: 500 .74rem/1.35 var(--h-sans); color: var(--h-text-2); }
.us-advice { margin: 0; color: var(--h-text-2); line-height: 1.6; }
.us-advice b { color: var(--h-text); }

/* 2 spine */
.us-spine { display: flex; flex-wrap: wrap; align-items: stretch; gap: 6px; margin-top: 10px; }
html body .us-node { flex: 1 1 150px; display: grid; gap: 4px; padding: 12px 14px; border: 1px solid var(--h-line); border-radius: 14px; background: linear-gradient(160deg, color-mix(in srgb, var(--unit) 10%, var(--h-panel-2)), var(--h-panel-2) 70%); color: var(--h-text); text-decoration: none; transition: border-color .2s, transform .2s; }
html body .us-node:hover { border-color: var(--unit); transform: translateY(-2px); }
.us-node-n { font: 700 .7rem/1 var(--h-sans); letter-spacing: .12em; color: var(--unit); }
.us-node-k { font: 600 1rem/1.2 var(--h-sans); }
.us-node-s { font: 400 .8rem/1.35 var(--h-sans); color: var(--h-text-2); }
.us-link { display: none; }
@media (min-width: 900px) { .us-spine { flex-wrap: nowrap; } html body .us-node { flex-basis: 0; padding: 12px 10px; } }
/* a long unit (more than 8 topics) wraps into rows instead of squeezing into one */
.us-spine.is-long { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
html body .us-spine.is-long .us-node { padding: 12px 14px; }

/* 3 ideas */
.us-ideas { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; margin-bottom: 26px; }
html body .us-idea { margin: 0; display: grid; gap: 8px; align-content: start; }
html body .us-idea h3 { margin: 0; font: 600 1.08rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; }
html body .us-idea p { margin: 0; color: var(--h-text-2); line-height: 1.55; font-size: .95rem; }
.us-idea-t a { font: 700 .7rem/1 var(--h-sans); letter-spacing: .12em; color: var(--unit); text-decoration: none; }
.us-eq { padding: 8px 12px; border-radius: 10px; background: rgba(0,0,0,.25); overflow-x: auto; }
html body .us-lab { font-size: .86rem !important; color: var(--h-muted) !important; }

/* 4 equations, like the sheet */
.us-sheet { background: linear-gradient(180deg, var(--h-panel), color-mix(in srgb, var(--h-panel) 85%, #EDE6D8 15%) 400%) !important; }
.us-eqs { display: grid; gap: 4px; margin-top: 10px; }
.us-eqrow { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr) auto; align-items: center; gap: 10px 18px; padding: 10px 14px; border-radius: 12px; background: rgba(255,255,255,.03); }
.us-eqrow.is-const { grid-template-columns: minmax(0, 1fr) auto; }
.us-eqmath { overflow-x: auto; overflow-y: hidden; padding: 2px 0; }
.us-eqmath .katex-display { margin: 0; text-align: left; }
.us-eqmath .katex { font-size: 1.15em; color: var(--h-text); }
.us-eqrow.is-const .us-eqmath .katex { font-size: 1.05em; }
.us-eqwhere { display: grid; gap: 2px; font: italic 400 .9rem/1.4 'Times New Roman', Times, serif; color: var(--h-text-2); }
.us-tag { padding: 4px 10px; border-radius: var(--h-pill); font: 700 .62rem/1.2 var(--h-sans); letter-spacing: .12em; text-transform: uppercase; white-space: nowrap; background: rgba(255,255,255,.06); color: var(--h-muted); }
.us-eqrow.is-sheet .us-tag { background: color-mix(in srgb, var(--unit) 16%, transparent); color: var(--unit); }
@media (max-width: 640px) { .us-eqrow, .us-eqrow.is-const { grid-template-columns: 1fr; gap: 6px; } .us-tag { width: max-content; } }

/* 5 traps, 6 forward */
.us-traps { display: grid; gap: 8px; }
.us-trap { display: grid; gap: 6px; padding: 12px 14px; border-radius: 12px; background: rgba(255,255,255,.03); }
html body .us-trap p { margin: 0; line-height: 1.55; font-size: .95rem; }
.us-trap-w { color: var(--h-text-2); }
.us-trap-w span { display: inline-block; margin-right: 8px; padding: 2px 8px; border-radius: var(--h-pill); background: rgba(240,132,110,.14); color: #F0846E; font: 700 .62rem/1.2 var(--h-sans); letter-spacing: .12em; text-transform: uppercase; vertical-align: 1px; }
.us-trap-r { display: flex; gap: 8px; color: var(--h-text); }
.us-trap-r > span { flex: none; display: grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: color-mix(in srgb, var(--h-good) 18%, transparent); color: var(--h-good); margin-top: 2px; }
.us-trap-r svg { width: 13px; height: 13px; }
.us-forward { margin: 0; padding-left: 1.2em; color: var(--h-text-2); line-height: 1.6; }
.us-forward li + li { margin-top: 6px; }

/* 8 final check */
.us-check { margin-top: 8px; }
html body .us-check > h2 { font: 600 1.35rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; }
html body .ced-question .us-qtopic { margin: -4px 0 6px; font: 700 .68rem/1.2 var(--h-sans); letter-spacing: .14em; text-transform: uppercase; color: var(--unit); }

/* ---------- the AP Chemistry Summary page (course-summary.js) ---------- */
.cs-weightnote { margin: 12px 0 0; font-size: .88rem; }
.cs-steps { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 0; counter-reset: cs; }
.cs-steps li { position: relative; display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 10px; align-items: start; padding: 7px 0 7px; }
.cs-steps li + li::before { content: ''; position: absolute; left: 25px; top: -7px; height: 14px; border-left: 1px dashed color-mix(in srgb, var(--unit, var(--h-gold-1)) 55%, transparent); }
html body .cs-steps a { display: grid; place-items: center; height: 26px; border-radius: var(--h-pill); background: color-mix(in srgb, var(--unit, var(--h-gold-1)) 14%, transparent); color: var(--unit, var(--h-gold-1)); font: 700 .74rem/1 var(--h-sans); text-decoration: none; transition: background .2s; }
html body .cs-steps a:hover { background: color-mix(in srgb, var(--unit, var(--h-gold-1)) 26%, transparent); }
.cs-step-s { color: var(--h-text-2); line-height: 1.5; font-size: .92rem; }
.cs-pracs { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 10px; margin-top: 12px; }
.cs-prac { display: grid; gap: 7px; align-content: start; padding: 14px 16px; border: 1px solid var(--h-line); border-radius: 14px; background: var(--h-panel-2); }
html body .cs-prac h3 { margin: 0; font: 600 1.05rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; }
html body .cs-prac p { margin: 0; color: var(--h-text-2); line-height: 1.55; font-size: .92rem; }
html body .cs-prac .cs-prac-n { font: 700 .68rem/1 var(--h-sans); letter-spacing: .14em; text-transform: uppercase; color: var(--unit, var(--h-gold-1)); }
.cs-prac-w { display: flex; flex-wrap: wrap; gap: 6px; }
.cs-prac-w span { padding: 4px 10px; border-radius: var(--h-pill); background: rgba(255,255,255,.05); font: 600 .72rem/1.2 var(--h-sans); color: var(--h-muted); }
.cs-prac-w b { color: var(--h-text); }
html body .cs-prac .cs-prac-look { color: var(--h-text); }
html body .cs-prac .us-lab a, html body .cs-trap-t a { color: var(--unit, var(--h-gold-1)); }
.cs-chips { display: flex; flex-wrap: wrap; gap: 4px; justify-content: flex-end; }
html body .cs-chip { padding: 4px 8px; border-radius: var(--h-pill); background: color-mix(in srgb, var(--unit, var(--h-gold-1)) 16%, transparent); color: var(--unit, var(--h-gold-1)); font: 700 .66rem/1.2 var(--h-sans); letter-spacing: .06em; text-decoration: none; }
html body .cs-chip:hover { background: color-mix(in srgb, var(--unit, var(--h-gold-1)) 28%, transparent); }
@media (max-width: 640px) { .cs-chips { justify-content: flex-start; } }
html body .us-trap .cs-trap-t { font: 600 .74rem/1.3 var(--h-sans); color: var(--h-muted); }
.cs-trap-t a { text-decoration: none; }
.cs-exam { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
html body .cs-exam .hw-course-link { margin: 0; }
@media (min-width: 760px) { .us-spine.is-long.cs-units { grid-template-columns: repeat(3, minmax(0, 1fr)); } }