/* Course → compact threads → one conversation. Logical properties preserve RTL. */
.discussion-workspace { min-width: 0; }
.discussion-heading { margin-block-end: 22px; }
.discussion-heading h1 { margin-block-end: 10px; }
.discussion-toolbar { display: flex; gap: 10px; align-items: end; max-width: 760px; margin-block-end: 24px; }
.discussion-search { display: grid; gap: 6px; min-width: 0; flex: 1; font-size: 13px; font-weight: 600; }
.discussion-search input { width: 100%; min-width: 0; min-height: 44px; padding: 10px 13px; border: 1px solid #e3dad3; border-radius: 12px; background: white; color: var(--ink); font: inherit; }
.discussion-result,.discussion-list-heading,.discussion-reply-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-block-end: 12px; }
.discussion-result h2,.discussion-list-heading h3,.discussion-reply-heading h3 { margin: 0; font-size: 15px; }
.discussion-course-list { border: 1px solid var(--line); border-radius: 18px; overflow: hidden; background: white; }
.discussion-course-row { display: grid; grid-template-columns: 96px minmax(100px,1fr) 100px 146px 72px; align-items: center; gap: 18px; padding: 15px 18px; color: var(--ink); min-height: 96px; }
.discussion-course-row + .discussion-course-row { border-block-start: 1px solid var(--hair); }
.discussion-course-row:hover,.discussion-course-row:focus-visible { background: var(--peach2); }
.discussion-course-row img { width: 96px; height: 64px; object-fit: cover; border-radius: 10px; }
.discussion-course-identity { min-width: 0; display: grid; gap: 5px; }
.discussion-course-identity strong { overflow-wrap: anywhere; font-size: 15px; }
.discussion-count { display: grid; text-align: center; gap: 1px; font-size: 12px; color: var(--ink2); }
.discussion-count strong { color: var(--ink); font-size: 18px; }
.discussion-count small { color: var(--brand); }
.discussion-latest { display: grid; gap: 5px; font-size: 12px; }
.discussion-open { color: var(--brand); font-size: 13px; font-weight: 700; white-space: nowrap; text-align: end; }
.discussion-mobile-count { display: none; color: var(--ink2); font-size: 12px; }
.discussion-breadcrumb { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-block-end: 14px; font-size: 13px; }
.discussion-breadcrumb strong { font-weight: 500; color: var(--ink2); }
.discussion-course-head { display: flex; gap: 12px; align-items: center; padding: 15px; border: 1px solid var(--line); border-radius: 16px; background: white; margin-block-end: 18px; }
.discussion-course-head img { width: 80px; height: 54px; object-fit: cover; border-radius: 9px; }
.discussion-course-head h2 { margin: 0 0 4px; font-size: 17px; overflow-wrap: anywhere; }
.discussion-panes { display: grid; grid-template-columns: minmax(260px,.85fr) minmax(320px,1.3fr); gap: 18px; align-items: start; }
.discussion-list-pane { min-width: 0; }
.discussion-thread-search { display: flex; gap: 8px; align-items: end; margin-block-end: 14px; }
.discussion-list-heading { flex-wrap: wrap; }
.discussion-visibility { display: inline-flex; gap: 2px; padding: 3px; border-radius: 10px; background: var(--paper2); font-size: 12px; }
.discussion-visibility a { padding: 6px 10px; border-radius: 8px; color: var(--ink2); }
.discussion-visibility .is-on { background: white; color: var(--brand); font-weight: 700; }
.discussion-thread-list { border: 1px solid var(--line); border-radius: 15px; background: white; overflow: auto; max-height: max(420px, calc(100dvh - 390px)); scrollbar-gutter: stable; scrollbar-width: thin; scrollbar-color: #d9cec6 transparent; }
.discussion-thread-list::-webkit-scrollbar { width: 7px; }
.discussion-thread-list::-webkit-scrollbar-track { background: transparent; }
.discussion-thread-list::-webkit-scrollbar-thumb { background: #d9cec6; border: 2px solid transparent; border-radius: 8px; background-clip: padding-box; }
.discussion-thread-list::-webkit-scrollbar-button { display: none; width: 0; height: 0; }
.discussion-thread-row { display: grid; gap: 8px; padding: 14px 15px; color: var(--ink); border-inline-start: 3px solid transparent; }
.discussion-thread-row + .discussion-thread-row { border-block-start: 1px solid var(--hair); }
.discussion-thread-row:hover { background: var(--paper); }
.discussion-thread-row.is-selected { background: var(--peach2); border-inline-start-color: var(--accent); }
.discussion-thread-meta { display: flex; align-items: center; justify-content: space-between; gap: 9px; font-size: 12px; }
.discussion-thread-meta strong { font-size: 13px; min-width: 0; overflow-wrap: anywhere; }
.discussion-thread-meta time { color: var(--ink3); white-space: nowrap; font-size: 10px; }
.discussion-excerpt { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.55; font-size: 13px; overflow-wrap: anywhere; }
.discussion-thread-foot { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 11px; color: var(--ink2); }
.discussion-tag { display: inline-block; padding: 2px 7px; border-radius: 6px; background: var(--paper2); color: var(--ink2); font-size: 11px; max-width: 100%; overflow-wrap: anywhere; }
.discussion-reader { min-width: 0; background: white; border: 1px solid var(--line); border-radius: 18px; padding: 22px; }
.discussion-reader-empty { display: grid; justify-items: center; text-align: center; padding: 68px 20px; gap: 10px; }
.discussion-reader-empty svg { color: var(--brand); fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; width: 32px; height: 32px; margin-block-end: 6px; }
.discussion-reader-empty h2 { margin: 0; }
.discussion-reader-empty p { max-width: 300px; font-size: 13px; }
.discussion-message-head { display: flex; align-items: center; gap: 10px; margin-block-end: 14px; }
.discussion-message-head > div { display: grid; gap: 3px; min-width: 0; }
.discussion-message-head h2 { font-size: 16px; margin: 0; }
.discussion-message-head strong { font-size: 14px; overflow-wrap: anywhere; }
.discussion-avatar { display: grid; place-items: center; flex: none; width: 38px; height: 38px; border-radius: 50%; background: var(--peach); color: var(--brand); font-weight: 700; }
.discussion-message { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.8; font-size: 14px; margin: 12px 0; }
.discussion-hidden-label { font-size: 11px; color: var(--bad); background: var(--bad-bg); padding: 3px 8px; border-radius: 6px; margin-inline-start: auto; }
.discussion-moderation { font-size: 12px; margin-block-start: 12px; }
.discussion-moderation summary { color: var(--brand); cursor: pointer; min-height: 36px; display: flex; align-items: center; gap: 5px; width: fit-content; }
.discussion-moderation summary::after { content: "+"; font-size: 15px; }
.discussion-moderation[open] summary::after { content: "−"; }
.discussion-moderation form { display: grid; justify-items: start; gap: 10px; padding: 13px; border-radius: 12px; background: var(--paper2); }
.discussion-moderation .field { width: 100%; }
.discussion-moderation-note { background: var(--paper2); border-inline-start: 2px solid var(--accent); padding: 8px 10px; border-radius: 6px; color: var(--ink2); font-size: 12px; }
.discussion-reply-heading { border-block-start: 1px solid var(--line); padding-block-start: 20px; margin-block-start: 16px; }
.discussion-reply { border-block-end: 1px solid var(--hair); padding-block: 14px; }
.discussion-reply.is-hidden { background: var(--paper2); padding-inline: 12px; border-radius: 12px; }
.discussion-reply .discussion-avatar { width: 32px; height: 32px; background: var(--paper2); color: var(--ink2); }
.discussion-no-replies { font-size: 13px; padding-block: 16px; }
.discussion-composer { margin-block-start: 24px; padding-block-start: 18px; border-block-start: 1px solid var(--line); }
.discussion-composer textarea { min-height: 106px; resize: vertical; }
.discussion-composer footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-block-start: 12px; }
.discussion-pagination { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 12px; margin-block-start: 18px; font-size: 12px; color: var(--ink2); }
.discussion-back { display: none; }
@media(max-width:1100px){.discussion-course-row{grid-template-columns:80px minmax(120px,1fr) 80px 64px;gap:12px}.discussion-course-row img{width:80px;height:56px}.discussion-latest{display:none}.discussion-panes{grid-template-columns:minmax(230px,.85fr) minmax(270px,1.3fr)}.discussion-reader{padding:17px}.discussion-thread-meta{flex-wrap:wrap;gap:4px}}
@media(max-width:760px){.discussion-panes{display:block}.discussion-thread-list{max-height:none;overflow:visible}.discussion-reader{display:none}.has-thread .discussion-list-pane{display:none}.has-thread .discussion-reader{display:block}.has-thread>.discussion-pagination{display:none}.discussion-back{display:inline-flex;min-height:40px;align-items:center;margin-block-end:14px;font-size:13px}.discussion-course-row{grid-template-columns:64px minmax(0,1fr) 56px;padding:13px;gap:12px}.discussion-course-row img{width:64px;height:52px}.discussion-count{display:none}.discussion-mobile-count{display:inline}.discussion-course-identity strong{font-size:14px}.discussion-toolbar{flex-wrap:wrap}.discussion-toolbar .discussion-search{flex-basis:100%}.discussion-heading h1{font-size:25px}.discussion-thread-meta{flex-wrap:nowrap}.discussion-composer footer{align-items:start;flex-direction:column}.discussion-composer footer .btn{align-self:end}.discussion-course-head{padding:12px}.discussion-course-head h2{font-size:15px}}