/* ============================================================
   UPSIDE — MINI-COURSES (course.html, and the admin preview)
   Scoped under .crs. Mobile first: the lesson list sits above the
   lesson on a phone and beside it from 900px.
   ============================================================ */
.crs { container: crs / inline-size; background: var(--paper-2, #fff); color: var(--tx, #101010); }
.crs *, .crs *::before, .crs *::after { box-sizing: border-box; }
.crs[aria-busy="true"] { min-height: 60vh; }
.crs .crs-wrap { max-width: 1120px; margin: 0 auto; padding: clamp(24px, 5cqi, 56px) clamp(16px, 4cqi, 40px) clamp(48px, 8cqi, 96px); }
.crs .crumbs { margin-bottom: 14px; }
.crs .crs-h1 { font-family: var(--f-display, Archivo, Arial, sans-serif); font-weight: 700; letter-spacing: -0.025em; line-height: 1.06; font-size: clamp(2rem, 6cqi, 3.4rem); margin: 0; text-wrap: balance; }
.crs .crs-h2 { font-family: var(--f-display, Archivo, Arial, sans-serif); font-weight: 650; letter-spacing: -0.02em; line-height: 1.15; font-size: clamp(1.4rem, 3.6cqi, 2rem); margin: 4px 0 16px; text-wrap: balance; }
.crs .crs-lead { margin: 12px 0 0; font-size: 1.05rem; line-height: 1.6; color: var(--tx-2, #555); max-width: 62ch; }
.crs .crs-kicker { margin: 0; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent, #ed1c24); }
.crs .crs-empty { margin-top: 24px; color: var(--tx-2, #555); }
.crs .crs-empty a { color: var(--accent, #ed1c24); font-weight: 600; }

/* list */
.crs .crs-grid { margin-top: 28px; display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.crs .crs-card { display: flex; flex-direction: column; border: 1px solid var(--line, rgba(10,10,10,.1)); border-radius: var(--r-md, 18px); overflow: hidden; text-decoration: none; color: inherit; background: #fff; transition: box-shadow .2s ease, transform .2s ease; }
.crs .crs-card:hover { box-shadow: var(--sh-md, 0 14px 40px rgba(10,10,10,.1)); transform: translateY(-3px); }
.crs .crs-card img, .crs .crs-card__ph { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.crs .crs-card__ph { background: linear-gradient(135deg, #1c1c1c, #3a3a3a); }
.crs .crs-card__body { display: flex; flex-direction: column; gap: 6px; padding: 16px 18px 18px; }
.crs .crs-card__body b { font-family: var(--f-display, Archivo, Arial, sans-serif); font-size: 1.15rem; line-height: 1.25; }
.crs .crs-card__body span { font-size: 0.9rem; line-height: 1.5; color: var(--tx-2, #555); }
.crs .crs-card__body small { font-size: 0.78rem; color: var(--tx-3, #767676); }

/* course */
.crs .crs-head { margin-bottom: 24px; }
.crs .crs-prog { display: flex; align-items: center; gap: 12px; margin-top: 18px; font-size: 0.84rem; color: var(--tx-2, #555); }
.crs .crs-prog__bar { flex: 0 1 260px; height: 8px; border-radius: 99px; background: var(--mist, #ececec); overflow: hidden; }
.crs .crs-prog__bar i { display: block; height: 100%; width: 0; background: var(--ok, #2f7d43); border-radius: inherit; transition: width .4s cubic-bezier(.2,.8,.2,1); }
.crs .crs-layout { display: grid; gap: 22px; grid-template-columns: minmax(0, 1fr); }
@container crs (min-width: 900px) { .crs .crs-layout { grid-template-columns: 300px minmax(0, 1fr); gap: 36px; align-items: start; } .crs .crs-side { position: sticky; top: 90px; } }
.crs .crs-side ol { list-style: none; margin: 0; padding: 6px; display: flex; flex-direction: column; gap: 2px; border: 1px solid var(--line, rgba(10,10,10,.1)); border-radius: var(--r-md, 18px); background: var(--paper, #f7f7f7); }
.crs .crs-side button { all: unset; box-sizing: border-box; cursor: pointer; width: 100%; display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 10px 10px; border-radius: 12px; font-size: 0.9rem; line-height: 1.35; }
.crs .crs-side button:hover { background: rgba(10, 10, 10, 0.04); }
.crs .crs-side button:focus-visible { box-shadow: 0 0 0 3px rgba(10, 10, 10, 0.15); }
.crs .crs-side button.is-on { background: #fff; box-shadow: var(--sh-sm, 0 2px 10px rgba(10,10,10,.06)); font-weight: 600; }
.crs .crs-side small { font-size: 0.74rem; color: var(--tx-3, #767676); }
.crs .crs-num { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; font-size: 0.78rem; font-weight: 600; background: #fff; border: 1px solid var(--line-2, rgba(10,10,10,.18)); }
.crs .is-done .crs-num { background: var(--ok, #2f7d43); border-color: var(--ok, #2f7d43); color: #fff; }
.crs .is-on .crs-num { border-color: var(--accent, #ed1c24); }
.crs .crs-lock { color: var(--tx-3, #767676); font-weight: 400; font-size: 0.8rem; }
.crs .crs-main { min-width: 0; outline: none; }
.crs .crs-video { position: relative; aspect-ratio: 16 / 9; border-radius: var(--r-md, 18px); overflow: hidden; background: #000; margin: 4px 0 22px; }
.crs .crs-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.crs .crs-body { max-width: 68ch; }
.crs .crs-body p, .crs .crs-body li { font-size: 1.02rem; line-height: 1.7; color: var(--tx-2, #3c3c3c); }
.crs .crs-body p { margin: 0 0 14px; }
.crs .crs-body h3 { font-family: var(--f-display, Archivo, Arial, sans-serif); font-size: 1.2rem; margin: 26px 0 8px; color: var(--tx, #101010); }
.crs .crs-body ul { margin: 0 0 16px; padding-left: 22px; }
.crs .crs-body li { margin-bottom: 6px; }
.crs .crs-body a { color: var(--accent, #ed1c24); font-weight: 600; }
.crs .crs-body strong { color: var(--tx, #101010); }
.crs .crs-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--line, rgba(10,10,10,.1)); flex-wrap: wrap; }
.crs .crs-end { margin-top: 28px; padding: 22px; border-radius: var(--r-md, 18px); background: var(--paper, #f7f7f7); display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.crs .crs-end p { margin: 0 0 8px; color: var(--tx-2, #555); }
.crs .crs-gate { margin-top: 22px; padding: clamp(18px, 4cqi, 28px); border: 1px solid var(--line, rgba(10,10,10,.1)); border-radius: var(--r-lg, 26px); background: #fff; box-shadow: var(--sh-sm, 0 2px 10px rgba(10,10,10,.06)); }
@container crs (max-width: 560px) { .crs .form-grid { grid-template-columns: 1fr; } }
.crs .crs-404 { padding-top: clamp(60px, 12cqi, 140px); }

/* the public page: clear the fixed site header (the admin preview has none) */
main.crs > .crs-wrap { padding-top: clamp(112px, 14vh, 150px); }