/* Showcase editor. SLUH theme for tools: system UI font, white panels,
   hairline borders, navy text, SLUH Blue accents (see SLUH-THEME.md). */
:root {
  --sluh-navy: #003366;
  --sluh-blue: #005588;
  --spirit-blue: #88ccec;
  --accent-rgb: 0, 85, 136;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --border: #dcdcd6;
  --track: #eeeeee;
  --text: #003366;
  --text-dim: #777777;
  --warm: #ccccbb;
  --danger: #a3262a;
  --ok: #2d6a4f;
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
}
h1, h2, h3 { margin: 0; }
code, kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
  background: var(--track);
  border-radius: 3px;
  padding: 1px 4px;
}
a { color: var(--sluh-blue); }

/* ---- app bar -------------------------------------------------------------- */
.appbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.6rem 1.2rem;
  background: var(--sluh-navy);
  color: #fff;
}
.brand { display: flex; align-items: center; gap: 0.75rem; }
.brand img { width: 38px; height: 38px; }
.brand h1 { font-size: 1.05rem; font-weight: 600; }
.brand p { margin: 0; font-size: 0.8rem; color: var(--spirit-blue); }
.appbar-actions { display: flex; align-items: center; gap: 0.6rem; }
.status { font-size: 0.85rem; color: rgba(255, 255, 255, 0.75); }
.status.dirty { color: var(--spirit-blue); font-weight: 600; }
.status.error { color: #ffb4b4; font-weight: 600; }
.appbar .btn.ghost { color: #fff; border-color: rgba(255, 255, 255, 0.35); background: transparent; }
.appbar .btn.ghost:hover { background: rgba(255, 255, 255, 0.1); }
.appbar .btn.primary { background: #fff; color: var(--sluh-navy); border-color: #fff; }
.appbar .btn.primary:disabled { background: transparent; color: rgba(255, 255, 255, 0.5); border-color: rgba(255, 255, 255, 0.25); }

.banner {
  padding: 0.7rem 1.2rem;
  background: #fff6d6;
  border-bottom: 1px solid #e8d9a0;
  color: #5c4a00;
  font-size: 0.9rem;
}

/* ---- buttons & fields --------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font: inherit; font-weight: 600; font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { border-color: var(--sluh-blue); }
.btn:focus-visible, .nav-item:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid rgba(var(--accent-rgb), 0.5);
  outline-offset: 1px;
}
.btn.primary { background: var(--sluh-blue); border-color: var(--sluh-blue); color: #fff; }
.btn.primary:hover { background: var(--sluh-navy); }
.btn.primary:disabled { opacity: 0.5; cursor: default; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); }
.btn.small { padding: 0.3rem 0.65rem; font-size: 0.82rem; }
.btn.block { width: 100%; }

.field { display: block; margin-bottom: 0.9rem; }
.field > span { display: flex; justify-content: space-between; gap: 1rem; font-size: 0.82rem; font-weight: 600; margin-bottom: 0.3rem; }
.field em { font-style: normal; font-weight: 400; color: var(--text-dim); }
.field em.over { color: var(--danger); font-weight: 600; }
.field.narrow { max-width: 180px; }
input:not([type=checkbox]), textarea, select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font: inherit;
}
textarea { resize: vertical; min-height: 5.5rem; line-height: 1.45; }
input[type=number] { font-variant-numeric: tabular-nums; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.switch { display: inline-flex; align-items: center; gap: 0.45rem; font-size: 0.88rem; font-weight: 600; cursor: pointer; margin: 0.2rem 1rem 0.4rem 0; }
.switch input { width: 16px; height: 16px; accent-color: var(--sluh-blue); }

/* ---- layout ----------------------------------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: 250px minmax(380px, 1fr) minmax(360px, 1.05fr);
  gap: 1.5rem;
  padding: 1.2rem;
  align-items: start;
}
.sidebar, .preview-col { position: sticky; top: 76px; }
.sidebar { max-height: calc(100vh - 92px); overflow: auto; }
.sidebar h2 {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-dim);
  margin: 1.2rem 0 0.5rem;
}
.sidebar nav { display: grid; gap: 0.25rem; }
.nav-item {
  all: unset;
  display: block;
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  font-weight: 600; font-size: 0.92rem;
  cursor: pointer;
}
.nav-item:hover { background: var(--track); }
.nav-item.active { background: rgba(var(--accent-rgb), 0.1); color: var(--sluh-blue); }

.course-list { list-style: none; margin: 0 0 0.8rem; padding: 0; display: grid; gap: 0.35rem; }
.course-item {
  display: grid; grid-template-columns: 56px 1fr; gap: 0.6rem; align-items: center;
  padding: 0.4rem;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  user-select: none;
}
.course-item:hover { background: var(--panel); border-color: var(--border); }
.course-item.active { background: var(--panel); border-color: var(--sluh-blue); }
.course-item.dragging { opacity: 0.4; }
.course-item.drop-before { box-shadow: 0 -3px 0 var(--sluh-blue); }
.course-item.drop-after { box-shadow: 0 3px 0 var(--sluh-blue); }
.course-item .thumb {
  width: 56px; height: 32px; border-radius: 4px;
  background: var(--sluh-navy) center/cover no-repeat;
}
.course-item .name { font-weight: 600; font-size: 0.88rem; line-height: 1.25; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.course-item .meta { font-size: 0.75rem; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.course-item.is-hidden .thumb, .course-item.is-hidden .name { opacity: 0.45; }
.course-item.is-hidden .meta::after { content: " · hidden"; }

.editor { min-width: 0; padding-bottom: 4rem; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin: 0.4rem 0 0.7rem; }
.panel-head h2 { font-size: 1.35rem; font-weight: 600; }
.panel-head h2 .muted { font-weight: 400; color: var(--text-dim); font-size: 1rem; font-variant-numeric: tabular-nums; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.4rem;
}
.card h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.4rem; }
.card.subtle { background: transparent; }
.card.subtle .btn { margin-top: 0.3rem; }
.hint { color: var(--text-dim); font-size: 0.85rem; margin: 0.2rem 0 0.6rem; }
.error { color: var(--danger); font-size: 0.85rem; }

/* ---- photos ------------------------------------------------------------------ */
.dropzone {
  border: 2px dashed transparent;
  border-radius: 12px;
  margin: 0 -8px 1.2rem;
  padding: 6px;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.over { border-color: var(--sluh-blue); background: rgba(var(--accent-rgb), 0.05); }
.drop-hint { margin: 0.6rem 0.2rem 0; color: var(--text-dim); font-size: 0.82rem; }
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 0.6rem; }
.photo-card {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  background: var(--track);
  cursor: pointer;
  outline: 2px solid transparent;
  outline-offset: 2px;
}
.photo-card img { width: 100%; height: 100%; object-fit: cover; display: block; pointer-events: none; }
.photo-card.selected { outline-color: var(--sluh-blue); }
.photo-card.dragging { opacity: 0.35; }
.photo-card.drop-before { box-shadow: -4px 0 0 var(--sluh-blue); }
.photo-card.drop-after { box-shadow: 4px 0 0 var(--sluh-blue); }
.photo-card .num {
  position: absolute; top: 4px; left: 4px;
  min-width: 20px; padding: 0 5px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55); color: #fff;
  font-size: 0.72rem; font-weight: 700; text-align: center;
  font-variant-numeric: tabular-nums;
}
.photo-card .flag {
  position: absolute; bottom: 4px; left: 4px; right: 4px;
  font-size: 0.7rem; font-weight: 600; color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.photo-card.is-hidden img { opacity: 0.3; filter: grayscale(1); }
.photo-card.is-hidden::after {
  content: "Hidden"; position: absolute; top: 4px; right: 4px;
  padding: 1px 6px; border-radius: 999px;
  background: var(--sluh-navy); color: #fff; font-size: 0.7rem; font-weight: 700;
}
.photo-card.uploading { display: grid; place-items: center; cursor: default; }
.photo-card.uploading span { font-size: 0.78rem; color: var(--text-dim); font-weight: 600; }
.photo-card.failed span { color: var(--danger); padding: 0 0.5rem; text-align: center; }

.detail-head { display: flex; align-items: center; justify-content: space-between; gap: 0.8rem; flex-wrap: wrap; }
.detail-actions { display: flex; align-items: center; gap: 0.5rem; }
.detail-actions select { width: auto; max-width: 200px; padding: 0.3rem 0.5rem; font-size: 0.82rem; }
.focus-picker { position: relative; margin: 0.4rem 0 1rem; cursor: crosshair; line-height: 0; border-radius: 6px; overflow: hidden; background: var(--track); }
.focus-picker img { width: 100%; height: auto; max-height: 420px; object-fit: contain; }
.crosshair {
  position: absolute; width: 26px; height: 26px; margin: -13px 0 0 -13px;
  border: 2px solid #fff; border-radius: 50%;
  box-shadow: 0 0 0 2px var(--sluh-blue), 0 0 10px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

/* ---- preview ------------------------------------------------------------------ */
.preview-box {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  background: var(--sluh-navy);
  border: 1px solid var(--border);
}
.preview-box iframe {
  position: absolute; top: 0; left: 0;
  width: 1600px; height: 900px;
  border: 0;
  transform-origin: 0 0;
  pointer-events: none;
}

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  width: min(420px, 92vw);
  color: var(--text);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
dialog::backdrop { background: rgba(0, 51, 102, 0.35); }
dialog h2 { font-size: 1.15rem; margin-bottom: 0.5rem; }
dialog p { font-size: 0.9rem; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 0.5rem; margin-top: 1rem; }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 230px 1fr; }
  .preview-col { grid-column: 2; grid-row: 1; position: static; }
  .editor { grid-column: 2; }
  .sidebar { grid-row: 1 / span 2; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; padding: 1rem; }
  .sidebar, .preview-col, .editor { grid-column: 1; grid-row: auto; position: static; max-height: none; }
  .row { grid-template-columns: 1fr; }
  .appbar { flex-wrap: wrap; }
  .brand p { display: none; }
}