/* ==========================================================
   ClayUniverse — Frontend Styles
   ========================================================== */

:root {
  --cu-primary:     #1a1a2e;
  --cu-accent:      #e94560;
  --cu-accent-2:    #0f3460;
  --cu-surface:     #ffffff;
  --cu-surface-2:   #f6f8fa;
  --cu-border:      #e1e4e8;
  --cu-text:        #24292f;
  --cu-text-muted:  #57606a;
  --cu-radius:      6px;
  --cu-gap:         1.5rem;
}

/* ── Utilities ─────────────────────────────────────────── */
.cu-message {
  padding: .75rem 1rem;
  border-radius: var(--cu-radius);
  margin-bottom: 1rem;
}
.cu-message--success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.cu-message--error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }

.cu-badge {
  display: inline-block;
  font-size: .7em;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  vertical-align: middle;
}
.cu-badge--mod { background: var(--cu-accent); color: #fff; }

.cu-empty { color: var(--cu-text-muted); font-style: italic; }

.cu-meta-sep { margin: 0 .4em; color: var(--cu-border); }

.cu-prose { line-height: 1.7; }
.cu-prose p { margin: 0 0 1em; }

/* ── Buttons ───────────────────────────────────────────── */
.cu-btn {
  display: inline-block;
  padding: .5rem 1.2rem;
  border-radius: var(--cu-radius);
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: opacity .15s;
}
.cu-btn:hover { opacity: .85; }
.cu-btn--primary   { background: var(--cu-accent); color: #fff; }
.cu-btn--secondary { background: var(--cu-surface-2); color: var(--cu-text); border: 1px solid var(--cu-border); }
.cu-btn-link { background: none; border: none; color: var(--cu-accent); cursor: pointer; font-size: .85em; padding: 0; }

/* ── Forms ─────────────────────────────────────────────── */
.cu-form { max-width: 520px; }
.cu-form-group { margin-bottom: 1rem; }
.cu-form-group label { display: block; font-weight: 600; margin-bottom: .3rem; font-size: .9rem; }
.cu-form-group input,
.cu-form-group textarea,
.cu-form-group select {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius);
  font-size: .95rem;
  box-sizing: border-box;
  background: var(--cu-surface);
  color: var(--cu-text);
}
.cu-form-group textarea { resize: vertical; }
.cu-required span { color: var(--cu-accent); }
.cu-form-row--half { display: flex; gap: 1rem; }
.cu-form-row--half .cu-form-group { flex: 1; }
.cu-form-actions { margin-top: 1.25rem; }

/* ── Avatars ───────────────────────────────────────────── */
.cu-avatar { border-radius: 50%; object-fit: cover; }
.cu-avatar--sm  { width: 32px;  height: 32px; }
.cu-avatar      { width: 48px;  height: 48px; }
.cu-avatar--lg  { width: 80px;  height: 80px; }

/* ── Registration ──────────────────────────────────────── */
.cu-registration-wrap { max-width: 520px; }
.cu-registration-wrap h2 { margin-bottom: 1.5rem; }

/* ── Conversations archive ─────────────────────────────── */
.cu-conversations-archive { max-width: 760px; }
.cu-archive-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.cu-archive-header h1 { margin: 0; }

.cu-conversation-list { list-style: none; margin: 0; padding: 0; }
.cu-conversation-item {
  border-bottom: 1px solid var(--cu-border);
}
.cu-conversation-link {
  display: block;
  padding: 1rem 0;
  text-decoration: none;
  color: inherit;
  transition: background .1s;
}
.cu-conversation-link:hover .cu-conversation-title { color: var(--cu-accent); }
.cu-conversation-title { font-weight: 700; font-size: 1.05rem; margin-bottom: .3rem; }
.cu-conversation-meta  { font-size: .85rem; color: var(--cu-text-muted); }

/* ── Single conversation ───────────────────────────────── */
.cu-conversation-single { max-width: 760px; }
.cu-conversation-header { margin-bottom: 1.5rem; }
.cu-conversation-title  { margin: 0 0 .5rem; }
.cu-conversation-meta   { display: flex; align-items: center; gap: .5rem; font-size: .85rem; color: var(--cu-text-muted); }
.cu-conversation-body   { background: var(--cu-surface-2); padding: 1.25rem; border-radius: var(--cu-radius); margin-bottom: 2rem; border: 1px solid var(--cu-border); }

/* ── Replies ───────────────────────────────────────────── */
.cu-replies { margin: 2rem 0; }
.cu-reply {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--cu-border);
}
.cu-reply-avatar { flex-shrink: 0; }
.cu-reply-body   { flex: 1; }
.cu-reply-meta {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
  color: var(--cu-text-muted);
  margin-bottom: .4rem;
}
.cu-reply-author { color: var(--cu-text); }
.cu-reply-content { }
.cu-no-replies { color: var(--cu-text-muted); font-style: italic; }

/* ── Formatting toolbar ────────────────────────────────── */
.cu-toolbar {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px 6px;
  background: var(--cu-surface-2);
  border: 1px solid var(--cu-border);
  border-bottom: none;
  border-radius: var(--cu-radius) var(--cu-radius) 0 0;
  flex-wrap: wrap;
}
.cu-toolbar + textarea,
.cu-toolbar + input[type="text"] {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.cu-tb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 26px;
  padding: 0 6px;
  font-size: .8rem;
  background: var(--cu-surface);
  border: 1px solid var(--cu-border);
  border-radius: 3px;
  cursor: pointer;
  color: var(--cu-text);
  line-height: 1;
  transition: background .1s, border-color .1s;
}
.cu-tb-btn:hover { background: var(--cu-accent); color: #fff; border-color: var(--cu-accent); }
.cu-tb-btn strong { font-weight: 700; }
.cu-tb-btn em     { font-style: italic; }
.cu-tb-sep {
  width: 1px;
  height: 18px;
  background: var(--cu-border);
  margin: 0 4px;
}
.cu-toolbar--sm { padding: 3px 4px; }
.cu-toolbar--sm .cu-tb-btn { min-width: 24px; height: 22px; font-size: .75rem; }

/* ── Reply form ────────────────────────────────────────── */
.cu-reply-form-wrap { margin-top: 2rem; }
.cu-reply-form-wrap h3 { margin-bottom: .5rem; }
.cu-reply-hint { font-size: .85rem; color: var(--cu-text-muted); margin-bottom: .75rem; }
.cu-reply-hint code { background: var(--cu-surface-2); padding: 2px 5px; border-radius: 3px; }
.cu-login-prompt { padding: 1rem; background: var(--cu-surface-2); border-radius: var(--cu-radius); color: var(--cu-text-muted); }

/* ── Shared items grid ─────────────────────────────────── */
.cu-shared-items-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--cu-gap);
}

@media (max-width: 800px) {
  .cu-shared-items-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .cu-shared-items-grid { grid-template-columns: 1fr; }
}

.cu-item-card {
  border: 1px solid var(--cu-border);
  border-radius: var(--cu-radius);
  overflow: hidden;
  background: var(--cu-surface);
  position: relative;
  transition: box-shadow .15s;
}
.cu-item-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.08); }

.cu-item-card__inner { display: block; text-decoration: none; color: inherit; }

.cu-item-card__media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--cu-surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cu-item-card__media img { width: 100%; height: 100%; object-fit: cover; }
.cu-item-card__icon { font-size: 2.5rem; }

.cu-item-card__body { padding: .75rem 1rem 1rem; }
.cu-item-card__type { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--cu-accent); }
.cu-item-card__title { margin: .25rem 0 .5rem; font-size: .95rem; font-weight: 700; }
.cu-item-card__meta { font-size: .8rem; color: var(--cu-text-muted); display: flex; gap: .75rem; }

.cu-delete-item {
  position: absolute;
  top: .4rem;
  right: .4rem;
  background: rgba(0,0,0,.55);
  color: #fff;
  border: none;
  border-radius: 3px;
  padding: 2px 8px;
  font-size: .75rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity .15s;
}
.cu-item-card:hover .cu-delete-item { opacity: 1; }

/* ── Profile ───────────────────────────────────────────── */
.cu-profile { max-width: 640px; }
.cu-profile-header { display: flex; gap: 1.25rem; align-items: flex-start; margin-bottom: 1.5rem; }
.cu-profile-name { margin: 0 0 .35rem; font-size: 1.4rem; }
.cu-profile-institution { color: var(--cu-text-muted); font-size: .9rem; }
.cu-profile-bio { border-top: 1px solid var(--cu-border); padding-top: 1rem; }

.cu-avatar-upload-section { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; }

/* ── Submit item form ──────────────────────────────────── */
.cu-submit-item-wrap { max-width: 580px; }
.cu-submit-item-wrap h2 { margin-bottom: 1.25rem; }

/* ── Type detection badge & form hint ──────────────────── */
.cu-type-badge {
  display: inline-block;
  margin-left: .5rem;
  padding: 1px 9px;
  border-radius: 20px;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  background: var(--cu-accent);
  color: #fff;
  vertical-align: middle;
}
.cu-type-badge[data-type="video"] { background: #e94560; }
.cu-type-badge[data-type="image"] { background: #0f3460; }
.cu-type-badge[data-type="audio"] { background: #5b5ea6; }
.cu-type-badge[data-type="link"]  { background: #2d6a4f; }
.cu-type-badge[data-type="text"]  { background: #646970; }

.cu-form-hint {
  margin: .3rem 0 0;
  font-size: .82rem;
  color: var(--cu-text-muted);
}

/* ── Inline item link ──────────────────────────────────── */
.cu-inline-item-link {
  display: inline-flex;
  align-items: center;
  gap: .3em;
  background: var(--cu-surface-2);
  border: 1px solid var(--cu-border);
  border-radius: 3px;
  padding: 1px 8px;
  font-size: .9em;
  text-decoration: none;
  color: var(--cu-accent-2);
}
.cu-inline-item-link::before { content: "📎"; font-size: .9em; }