/* ===========================================================================
   house-watch.css — Watch tab video cards, in-place player, unit summary page
   =========================================================================== */
html body .hw-intro p a { color: var(--h-gold-1); text-decoration: underline; text-underline-offset: 3px; }
.hw-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; margin: 16px 0 8px; }
.hw-card { display: grid; gap: 0; overflow: hidden; border: 1px solid var(--h-line); border-radius: 18px; background: var(--h-panel); transition: border-color .25s, transform .25s; }
.hw-card:hover { border-color: rgba(242,191,94,.5); }
.hw-card.is-seen { border-color: color-mix(in srgb, var(--h-good) 35%, var(--h-line)); }
html body .hw-play { position: relative; display: block; width: 100%; padding: 0; margin: 0; border: 0; border-radius: 0; background: #000; cursor: pointer; aspect-ratio: 16 / 9; overflow: hidden; }
.hw-play img { display: block; width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: opacity .25s, transform .4s cubic-bezier(.25,1,.5,1); }
.hw-play:hover img { opacity: 1; transform: scale(1.03); }
.hw-playicon { position: absolute; left: 50%; top: 50%; display: grid; place-items: center; width: 64px; height: 64px; transform: translate(-50%, -50%); border-radius: 50%; background: var(--h-gold-grad); color: var(--h-on-gold); box-shadow: 0 10px 30px rgba(0,0,0,.45); transition: transform .25s; }
.hw-playicon svg { width: 30px; height: 30px; margin-left: 3px; }
.hw-play:hover .hw-playicon { transform: translate(-50%, -50%) scale(1.08); }
.hw-play:focus-visible { outline: 2px solid var(--h-gold-1); outline-offset: -4px; }
.hw-frame { position: relative; aspect-ratio: 16 / 9; background: #000; }
.hw-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.hw-meta { display: grid; gap: 6px; padding: 14px 16px 16px; }
.hw-meta p { margin: 0; }
html body .hw-meta h3 { margin: 0; font: 600 1.05rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; }
.hw-part { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.hw-part > span:first-child { padding: 3px 9px; border-radius: var(--h-pill); background: color-mix(in srgb, var(--unit) 16%, transparent); color: var(--unit); font: 700 .66rem/1.2 var(--h-sans); letter-spacing: .12em; text-transform: uppercase; }
.hw-seen { display: inline-flex; align-items: center; gap: 4px; font: 600 .72rem/1 var(--h-sans); color: var(--h-good); }
.hw-seen svg { width: 13px; height: 13px; }
.hw-by { font-size: .86rem; color: var(--h-text-2); }
.hw-by span { color: var(--h-muted); }
html body .hw-ext { display: inline-flex; align-items: center; gap: 6px; width: max-content; margin-top: 2px; font: 500 .84rem/1.2 var(--h-sans); color: var(--h-gold-1); text-decoration: underline; text-underline-offset: 3px; }
.hw-ext svg { width: 14px; height: 14px; }

/* unit summary placeholder */
.hw-soon { border-color: color-mix(in srgb, var(--unit) 40%, transparent) !important; background: linear-gradient(130deg, color-mix(in srgb, var(--unit) 10%, var(--h-panel)), var(--h-panel) 65%) !important; }
.hw-topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; counter-reset: none; }
html body .hw-topics a { display: block; padding: 11px 14px; border: 1px solid var(--h-line); border-radius: 12px; background: var(--h-panel-2); color: var(--h-text); font: 500 .94rem/1.35 var(--h-sans); text-decoration: none; transition: border-color .2s, transform .2s; }
html body .hw-topics a:hover { border-color: rgba(242,191,94,.55); transform: translateY(-1px); }

/* AP Chemistry Summary (whole course) and the link to it from each unit summary */
.hw-group { margin-top: 26px; }
.hw-group-head { margin: 0 0 4px; }
html body .hw-group-head h2 { margin: 0 0 4px; font: 600 1.35rem/1.3 var(--h-sans) !important; color: var(--h-text) !important; }
.hw-group-head p { margin: 0; color: var(--h-text-2); line-height: 1.55; }
.hw-units { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; counter-reset: none; }
html body .hw-units a { display: grid; gap: 2px; padding: 11px 14px; border: 1px solid var(--h-line); border-radius: 12px; background: var(--h-panel-2); color: var(--h-text); text-decoration: none; transition: border-color .2s, transform .2s; }
html body .hw-units a b { font: 700 .68rem/1.2 var(--h-sans); letter-spacing: .14em; text-transform: uppercase; color: var(--h-gold-1); }
html body .hw-units a span { font: 500 .94rem/1.35 var(--h-sans); }
html body .hw-units a:hover { border-color: rgba(242,191,94,.55); transform: translateY(-1px); }
html body .hw-course-link { display: grid; gap: 4px; margin-top: 18px; padding: 18px 20px; border: 1px solid rgba(242,191,94,.35) !important; border-radius: 18px; background: linear-gradient(130deg, rgba(242,191,94,.12), var(--h-panel) 60%) !important; color: var(--h-text); text-decoration: none; transition: border-color .2s, transform .2s; }
html body .hw-course-link:hover { border-color: rgba(242,191,94,.7) !important; transform: translateY(-1px); }
.hw-course-k { font: 700 .68rem/1.2 var(--h-sans); letter-spacing: .16em; text-transform: uppercase; color: var(--h-gold-1); }
.hw-course-t { font: 600 1.2rem/1.25 var(--h-sans); color: var(--h-text); }
.hw-course-s { font: 400 .92rem/1.5 var(--h-sans); color: var(--h-text-2); }
.hw-note { font-size: .82rem; line-height: 1.45; color: var(--h-muted); }