:root {
  --bg: #0f1115; --panel: #181b22; --border: #2a2f3a;
  --text: #e8eaf0; --muted: #8b93a5; --accent: #4f8cff; --ok: #3fb96f; --warn: #e0a23c;
  font-size: 15px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: -apple-system, "Segoe UI", Roboto, sans-serif; }
header { display: flex; align-items: center; justify-content: space-between; padding: 14px 22px; border-bottom: 1px solid var(--border); }
h1 { font-size: 1.1rem; margin: 0; display: flex; align-items: center; gap: 10px; }
#logo { height: 34px; width: auto; display: block; }
nav { display: flex; gap: 8px; }
main { padding: 22px; max-width: 1280px; margin: 0 auto; }
button, select, input {
  background: var(--panel); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px; font-size: 0.92rem;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.ghost { background: transparent; border: none; }
.icon-btn {
  background: transparent; border: none; padding: 7px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; color: var(--muted); cursor: pointer;
  transition: color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--text); background: #1d2230; border: none; }
.icon-btn svg { width: 18px; height: 18px; display: block; }
@keyframes spin { to { transform: rotate(360deg); } }
#btn-refresh.spinning svg { animation: spin 0.6s linear infinite; }
.link { color: var(--accent); cursor: pointer; text-decoration: underline; }
.muted { color: var(--muted); font-size: 0.85rem; }

#keybar { display: flex; gap: 8px; align-items: center; padding: 10px 22px; background: #1d2230; border-bottom: 1px solid var(--border); }
#keybar input { flex: 1; max-width: 420px; }

#brand-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 16px; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
.brand-tab {
  border-radius: 999px; padding: 6px 16px; font-size: 0.9rem;
  background: transparent; border: 1px solid var(--border); color: var(--muted);
}
.brand-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.searchbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.searchbar input[type="search"] { flex: 1; min-width: 260px; }
#btn-search { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; margin-top: 16px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; }
.thumb { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; background: #000; }
.card-body { padding: 10px 12px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
/* Card descriptions are clamped to 2 lines; click to expand/collapse */
.desc {
  margin: 0; font-size: 0.84rem; line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; cursor: pointer;
}
.desc:hover { color: #fff; }
.desc.expanded { -webkit-line-clamp: unset; display: block; }
.badges { margin: 0; display: flex; flex-wrap: wrap; gap: 4px; }
.badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; background: #232836; color: var(--muted); }
.badge.person { background: #2a3a5c; color: #9db8f0; }
.badge.course { background: #2c4434; color: #8fd6a8; }
.copy-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; }
.copy-row button { font-size: 0.74rem; padding: 5px 8px; }

/* Lightbox */
/* display:flex below overrides the UA's [hidden]{display:none} — restate it,
   or the lightbox is permanently visible regardless of the hidden attribute. */
#lightbox[hidden] { display: none; }
#lightbox {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(5, 7, 12, 0.88); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
#lightbox figure {
  position: relative; margin: 0; max-width: min(1100px, 94vw); max-height: 92vh;
  display: flex; flex-direction: column; gap: 0;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
#lb-img { max-width: 100%; max-height: calc(92vh - 150px); min-height: 120px; object-fit: contain; background: #000; }
#lightbox figcaption { padding: 14px 18px; display: flex; flex-direction: column; gap: 10px; }
#lb-desc { margin: 0; font-size: 0.9rem; line-height: 1.4; }
.lb-actions { display: flex; gap: 8px; flex-wrap: wrap; }
#lb-download { background: var(--accent); border-color: var(--accent); color: #fff; }
#lb-close {
  position: absolute; top: 10px; right: 10px; z-index: 2;
  background: rgba(0,0,0,0.55); border: none; color: #fff; border-radius: 50%;
  width: 36px; height: 36px; font-size: 1rem;
}
.thumb-link { cursor: zoom-in; }
#lb-editor label { display: block; font-size: 0.82rem; color: var(--muted); margin-bottom: 8px; }
#lb-editor textarea, #lb-editor input { width: 100%; margin-top: 3px; box-sizing: border-box; font-size: 0.88rem; }
#lb-editor textarea { resize: vertical; }
.ed-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
#ed-save { background: var(--accent); border-color: var(--accent); color: #fff; }

#load-more-wrap { text-align: center; margin: 22px 0 8px; }
#load-more { padding: 10px 28px; }

/* Help guide + Settings (shared modal pattern) */
#help[hidden], #settings[hidden] { display: none; } /* author display must restate [hidden] — see lightbox */
#help, #settings {
  position: fixed; inset: 0; z-index: 110;
  background: rgba(5, 7, 12, 0.88); backdrop-filter: blur(4px);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 5vh 16px; overflow-y: auto;
}
#help article, #settings article {
  position: relative; max-width: 760px; width: 100%;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px 30px 34px; line-height: 1.55; font-size: 0.95rem;
}
#help h2, #settings h2 { margin: 0 44px 6px 0; font-size: 1.25rem; }
#settings article { max-width: 560px; }
#settings h3 { margin: 22px 0 4px; font-size: 1rem; }
.settings-row { display: flex; gap: 8px; margin-top: 10px; }
.settings-row input { flex: 1; }
#people-list { margin: 10px 0 14px; }
.person-row { display: flex; gap: 10px; align-items: baseline; padding: 6px 0; border-bottom: 1px solid var(--border); }
.person-row strong { color: var(--text); }
.person-form { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.person-form input[type="text"], #person-name { flex: 1; min-width: 180px; }
.file-label {
  display: inline-block; cursor: pointer; background: var(--panel);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; font-size: 0.92rem;
}
.file-label:hover { border-color: var(--accent); }
#person-register { background: var(--accent); border-color: var(--accent); color: #fff; }
#help details {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; margin-top: 12px; background: #1b2029;
}
#help summary { cursor: pointer; font-weight: 600; }
#help summary:hover { color: var(--accent); }
#help details p, #help details ul { color: #c7cdd9; }
#help code, #help kbd {
  background: #232836; border-radius: 5px; padding: 1px 6px;
  font-size: 0.85em; color: #b6c4e2;
}
#help-close, #settings-close {
  position: absolute; top: 14px; right: 14px;
  background: rgba(0,0,0,0.45); border: none; color: #fff;
  border-radius: 50%; width: 34px; height: 34px;
}

#dropzone { border: 2px dashed var(--border); border-radius: 14px; padding: 40px 24px; text-align: center; transition: border-color 0.15s; }
#dropzone.over { border-color: var(--accent); background: #161b27; }
.upload-opts { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.upload-opts input { min-width: 280px; }
#upload-list { margin-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.upload-item { display: flex; gap: 12px; align-items: center; background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px; }
.upload-item img { width: 56px; height: 56px; object-fit: cover; border-radius: 8px; }
.upload-item .status { margin-left: auto; font-size: 0.82rem; white-space: nowrap; }
.status.ok { color: var(--ok); } .status.warn { color: var(--warn); } .status.err { color: #e06c6c; }