/* Hallmark · component: course helper banner · theme: VietNabi locked · pre-emit critique: P4 H5 E4 S5 R5 V4 */
.course-helper-banner { width: min(100%, var(--content-max)); margin-inline: auto; margin-block-end: calc(var(--space-md) + var(--space-2xs)); }
.course-helper-banner__panel { position: relative; min-height: 7.75rem; padding: var(--space-sm) var(--page-gutter); overflow: hidden; background: var(--color-ink); color: var(--color-paper); isolation: isolate; }
.course-helper-banner__image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 75% top; z-index: -2; }
.course-helper-banner__panel::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, var(--color-ink) 0%, var(--color-ink) 45%, color-mix(in oklch, var(--color-ink) 25%, transparent) 55%, transparent 65%); }
.course-helper-banner__copy { max-width: 65%; }
.course-helper-banner h2 { margin: 0; font-family: var(--font-body); font-size: 1.125rem; line-height: 1.35; font-weight: 700; letter-spacing: -.025em; word-break: keep-all; }
.course-helper-banner p { margin: var(--space-2xs) 0 var(--space-xs); font-size: var(--text-sm); line-height: 1.4; word-break: keep-all; }
.course-helper-banner button { min-height: 1.75rem; padding: 0 var(--space-xs); border: 0; border-radius: var(--radius-pill); background: var(--color-accent); color: var(--color-accent-ink); font: inherit; font-size: var(--text-xs); font-weight: 700; cursor: pointer; }
.course-helper-banner button span { margin-inline-start: var(--space-xs); }
.course-assistant { position: fixed; inset: auto 0 0; width: 100%; max-width: 38rem; height: min(44rem, 90dvh); margin: auto auto 0; border: 0; padding: 0; border-radius: var(--radius-md) var(--radius-md) 0 0; background: var(--color-paper); color: var(--color-ink); overflow: hidden; transform: translate3d(0, 110dvh, 0); transition: transform .42s cubic-bezier(.16, 1, .3, 1); will-change: transform; }
.course-assistant[open] { display: flex; flex-direction: column; }
.course-assistant.is-open { transform: translate3d(0, 0, 0); }
.course-assistant[data-closing="true"] { transition-timing-function: cubic-bezier(.65, 0, .35, 1); pointer-events: none; }
.course-assistant::backdrop { background: var(--color-backdrop); }
.course-assistant > header { flex: 0 0 auto; padding: var(--space-lg); display: flex; justify-content: space-between; align-items: start; gap: var(--space-md); border-block-end: var(--rule-hair) solid var(--color-rule); }
.course-assistant h2 { margin: 0; font-size: var(--text-md); }
.course-assistant header p { margin: var(--space-xs) 0 0; color: var(--color-muted); font-size: var(--text-sm); line-height: 1.5; }
.course-assistant header button { width: 2.75rem; height: 2.75rem; flex: 0 0 auto; border: 0; border-radius: 50%; background: var(--color-paper-2); font-size: var(--text-lg); cursor: pointer; }
.course-assistant__progress { flex: 0 0 .1875rem; background: var(--color-paper-2); }
.course-assistant__progress span { display: block; width: 100%; height: 100%; transform: scaleX(0); transform-origin: left; background: var(--color-accent); transition: transform .2s ease; }
.course-assistant__body { flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
.course-assistant__transcript { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-sm); max-height: 35dvh; padding: var(--space-lg); overflow-y: auto; }
.course-assistant__bubble { max-width: 88%; margin: 0; padding: .75rem 1rem; border-radius: var(--radius-md); background: var(--color-paper-2); font-size: var(--text-sm); line-height: 1.5; }
.course-assistant__bubble--user { align-self: flex-end; background: var(--color-accent); color: var(--color-accent-ink); }
.course-assistant__options { display: grid; gap: var(--space-xs); padding: 0 var(--space-lg) var(--space-lg); }
.course-assistant__options:empty { display: none; }
.course-assistant__option { display: grid; gap: .125rem; min-height: 2.75rem; padding: .625rem .875rem; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-sm); background: var(--color-paper); color: var(--color-ink); font: inherit; text-align: left; cursor: pointer; }
.course-assistant__option:hover, .course-assistant__option:focus-visible { border-color: var(--color-accent); background: var(--color-paper-2); }
.course-assistant__option strong { font-size: var(--text-sm); }
.course-assistant__option span { color: var(--color-muted); font-size: var(--text-xs); }
.course-assistant__status { margin: 0; padding: 0 var(--space-lg) var(--space-sm); color: var(--color-muted); font-size: var(--text-sm); }
.course-assistant__status:empty { display: none; }
.course-assistant__results { display: grid; gap: var(--space-sm); padding: 0 var(--space-lg) var(--space-lg); }
.course-assistant__results:empty { padding: 0; }
.course-assistant__results-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-sm); }
.course-assistant__results-head h3 { margin: 0; font-size: var(--text-base); }
.course-assistant__results-head strong { white-space: nowrap; color: var(--color-accent); font-size: var(--text-sm); }
.course-assistant__result-list { display: grid; gap: var(--space-sm); }
.course-assistant__result { min-width: 0; display: grid; grid-template-columns: 5.25rem minmax(0, 1fr); gap: .625rem; align-items: start; padding: .875rem; border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-md); background: var(--color-paper); }
.course-assistant__result.is-image-free { grid-template-columns: 1fr; }
.course-assistant__result img { width: 5.25rem; height: 5.25rem; object-fit: cover; border-radius: .625rem; }
.course-assistant__result-copy { min-width: 0; display: grid; align-content: start; gap: .125rem; }
.course-assistant__result-copy > small { color: var(--color-accent); font-size: .6875rem; font-weight: 600; line-height: 1.3; }
.course-assistant__result-copy > strong { font-size: .9375rem; font-weight: 700; line-height: 1.35; word-break: keep-all; }
.course-assistant__result-course-line { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .125rem .5rem; margin-top: .25rem; }
.course-assistant__result-course-line p { margin: 0; color: var(--color-ink-2); font-size: .8125rem; line-height: 1.4; word-break: keep-all; overflow-wrap: anywhere; }
.course-assistant__result-course-line b { color: var(--color-accent); font-size: .875rem; font-weight: 700; line-height: 1.4; white-space: nowrap; }
.course-assistant__result-included { grid-column: 1 / -1; display: grid; grid-template-columns: 3.5rem minmax(0, 1fr); gap: .5rem; padding-block: .625rem .25rem; border-block-start: var(--rule-hair) solid var(--color-rule); }
.course-assistant__result-included h4 { margin: 0; color: var(--color-muted); font-size: .6875rem; font-weight: 600; line-height: 1.5; }
.course-assistant__result-included ul { display: flex; flex-wrap: wrap; gap: .125rem .375rem; margin: 0; padding: 0; list-style: none; color: var(--color-ink-2); font-size: .75rem; line-height: 1.5; }
.course-assistant__result-included li + li::before { content: "·"; margin-right: .375rem; color: var(--color-muted); }
.course-assistant__result-tags { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: .25rem; }
.course-assistant__result-tags span { padding: .1875rem .4375rem; border-radius: var(--radius-pill); background: var(--color-paper-2); color: var(--color-ink-2); font-size: .6875rem; line-height: 1.25; }
.course-assistant__result-tags span:first-child { background: color-mix(in oklab, var(--color-accent) 9%, var(--color-paper)); color: var(--color-accent); }
.course-assistant__result-actions { grid-column: 1 / -1; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: .5rem; width: 100%; max-width: 22rem; margin-top: .125rem; margin-inline-start: auto; }
.course-assistant__result-actions a { display: grid; place-items: center; min-height: 2.375rem; padding: .375rem .75rem; border: var(--rule-hair) solid var(--color-rule); border-radius: var(--radius-sm); color: var(--color-ink-2); font-size: .75rem; font-weight: 700; text-align: center; text-decoration: none; white-space: nowrap; }
.course-assistant__result-actions a:last-child { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-accent-ink); }
.course-assistant__more { min-height: 2.75rem; border: var(--rule-hair) solid var(--color-rule-strong); border-radius: var(--radius-sm); background: var(--color-paper); color: var(--color-accent); font: inherit; font-size: var(--text-sm); font-weight: 700; cursor: pointer; }
.course-assistant__empty { margin: 0; color: var(--color-muted); font-size: var(--text-sm); }
.course-assistant__controls { flex: 0 0 auto; display: flex; align-items: center; justify-content: space-between; gap: var(--space-xs); padding: var(--space-sm) var(--space-lg); border-block-start: var(--rule-hair) solid var(--color-rule); background: var(--color-paper); }
.course-assistant__controls button { min-height: 2.5rem; border: 0; background: transparent; color: var(--color-accent); font: inherit; font-size: var(--text-sm); font-weight: 700; cursor: pointer; }
.course-assistant__controls button:disabled { color: var(--color-muted); cursor: default; }
.course-assistant__controls span { color: var(--color-muted); font-size: var(--text-xs); }
@media (min-width: 40rem) {
  .course-helper-banner__panel { min-height: 9rem; padding: var(--space-md) var(--page-gutter); }
  .course-helper-banner h2 { font-size: var(--text-lg); }
  .course-helper-banner p { max-width: none; font-size: var(--text-base); }
  .course-helper-banner button { font-size: var(--text-sm); }
  .course-assistant { inset: 5dvh 0 auto; margin: auto; border-radius: var(--radius-md); }
}
@media (prefers-reduced-motion: reduce) {
  .course-assistant, .course-assistant__progress span { transition-duration: 0s; }
}