/* ── Karaoke Event Frontend ── */
.ke-wrap {
  --ke-purple: #a855f7;
  --ke-purple-dark: #9333ea;
  --ke-bg: #0f0a1a;
  --ke-card: rgba(255,255,255,0.05);
  --ke-border: rgba(255,255,255,0.1);
  --ke-text: #fff;
  --ke-muted: rgba(255,255,255,0.4);
  --ke-glow: 0 0 30px rgba(168,85,247,0.15);

  background: linear-gradient(135deg, #0f0a1a 0%, #1a0a2e 50%, #0f0a1a 100%);
  color: var(--ke-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px;
  min-height: 60vh;
  border-radius: 16px;
}

.ke-center { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; min-height: 300px; }
.ke-icon { font-size: 48px; margin-bottom: 12px; }
.ke-spinner { width: 40px; height: 40px; border: 4px solid var(--ke-purple); border-top-color: transparent; border-radius: 50%; animation: ke-spin 0.8s linear infinite; margin: 0 auto 16px; }
@keyframes ke-spin { to { transform: rotate(360deg); } }

.ke-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.ke-header h2 { margin: 0; font-size: 22px; }
.ke-sub { color: var(--ke-muted); font-size: 14px; margin: 4px 0 0; }

.ke-card { background: var(--ke-card); border: 1px solid var(--ke-border); border-radius: 16px; padding: 24px; margin-bottom: 24px; box-shadow: var(--ke-glow); }
.ke-card h3 { margin: 0 0 16px; font-size: 18px; }
.ke-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.ke-card-header h3 { margin: 0; }

.ke-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .ke-grid { grid-template-columns: 1fr; } }
.ke-field { margin-top: 16px; }

.ke-wrap label { display: block; font-size: 13px; color: var(--ke-muted); margin-bottom: 4px; }
.ke-wrap input[type="text"],
.ke-wrap input[type="date"] {
  width: 100%; box-sizing: border-box;
  background: rgba(255,255,255,0.1); border: 1px solid var(--ke-border); border-radius: 12px;
  padding: 10px 16px; color: #fff; font-size: 15px;
}
.ke-wrap input:focus { outline: none; border-color: var(--ke-purple); box-shadow: 0 0 0 3px rgba(168,85,247,0.15); }
.ke-wrap input::placeholder { color: rgba(255,255,255,0.3); }
.ke-hint { color: var(--ke-muted); font-size: 12px; }

/* Filter row */
.ke-filter-row { display: flex; gap: 10px; margin-bottom: 12px; align-items: stretch; }
@media (max-width: 600px) { .ke-filter-row { flex-direction: column; } }

/* Search */
.ke-search-wrap { position: relative; }
.ke-search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-size: 14px; }
.ke-search-wrap input[type="text"] { padding-left: 36px !important; }

/* Select */
.ke-select {
  background: rgba(255,255,255,0.1); border: 1px solid var(--ke-border); border-radius: 12px;
  padding: 10px 16px; color: #fff; font-size: 14px; min-width: 160px; cursor: pointer;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='rgba(255,255,255,0.5)' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
}
.ke-select:focus { outline: none; border-color: var(--ke-purple); box-shadow: 0 0 0 3px rgba(168,85,247,0.15); }
.ke-select option { background: #1a0a2e; color: #fff; }

/* Song list */
.ke-song-list { max-height: 380px; overflow-y: auto; border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; background: rgba(0,0,0,0.2); padding: 8px; }
.ke-song-item { display: flex; align-items: center; gap: 10px; padding: 6px 14px; border-radius: 8px; cursor: pointer; border: 1px solid transparent; transition: all 0.15s; }
.ke-song-item:hover { background: rgba(168,85,247,0.08); }
.ke-song-item.selected { background: rgba(168,85,247,0.15); border-color: rgba(168,85,247,0.4); }
.ke-song-check { width: 20px; height: 20px; border-radius: 4px; border: 1px solid rgba(255,255,255,0.2); flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 12px; }
.ke-song-item.selected .ke-song-check { background: var(--ke-purple); border-color: var(--ke-purple); }
.ke-song-title { color: #fff; font-weight: 500; font-size: 14px; }
.ke-song-artist { color: var(--ke-muted); font-size: 12px; }
.ke-song-genre { display: inline-block; background: rgba(168,85,247,0.15); color: #c084fc; font-size: 10px; padding: 1px 6px; border-radius: 4px; margin-left: 6px; vertical-align: middle; }
.ke-selection-count { color: var(--ke-purple); font-size: 13px; font-weight: 600; margin-bottom: 8px; }

.ke-custom-section { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--ke-border); }
.ke-custom-section h4 { margin: 0 0 4px; font-size: 14px; }

/* Buttons */
.ke-btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 12px; font-size: 16px; font-weight: 600; border: none; cursor: pointer; transition: all 0.15s; }
.ke-btn-sm { padding: 8px 16px; font-size: 13px; }
.ke-btn-primary { background: var(--ke-purple-dark); color: #fff; box-shadow: 0 4px 20px rgba(147,51,234,0.3); }
.ke-btn-primary:hover { background: var(--ke-purple); }
.ke-btn-primary:disabled { opacity: 0.5; cursor: default; }
.ke-btn-secondary { background: rgba(255,255,255,0.1); color: #fff; }
.ke-btn-secondary:hover { background: rgba(255,255,255,0.2); }
.ke-actions { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 8px; }
.ke-error { color: #f87171; font-size: 14px; }

/* Success card */
.ke-success-card { text-align: center; }
.ke-success-card h2 { color: #4ade80; }
.ke-success-card .ke-actions { justify-content: center; }

/* Stats */
.ke-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 24px; }
@media (max-width: 600px) { .ke-stats { grid-template-columns: repeat(2, 1fr); } }
.ke-stat { background: var(--ke-card); border: 1px solid var(--ke-border); border-radius: 12px; padding: 16px; text-align: center; }
.ke-stat-num { display: block; font-size: 28px; font-weight: 700; }
.ke-stat-label { color: var(--ke-muted); font-size: 12px; }
.ke-purple { color: #a855f7; }
.ke-green { color: #4ade80; }
.ke-blue { color: #60a5fa; }
.ke-orange { color: #fb923c; }

/* Registration list */
.ke-reg-card { background: var(--ke-card); border: 1px solid var(--ke-border); border-radius: 12px; padding: 16px 20px; margin-bottom: 10px; }
.ke-reg-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.ke-reg-name { font-weight: 600; }
.ke-reg-group { color: var(--ke-muted); font-size: 13px; margin-left: 8px; }
.ke-reg-time { color: rgba(255,255,255,0.2); font-size: 12px; flex-shrink: 0; }
.ke-reg-songs { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.ke-reg-song-tag { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 8px; font-size: 12px; }
.ke-reg-song-tag.ke-from-list { background: rgba(168,85,247,0.2); color: #c084fc; }
.ke-reg-song-tag.ke-custom { background: rgba(251,146,60,0.2); color: #fdba74; }
.ke-reg-number { background: rgba(168,85,247,0.3); color: #c084fc; font-size: 11px; font-weight: 700; width: 24px; height: 24px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; margin-right: 6px; vertical-align: middle; }

/* Done state */
.ke-reg-card.ke-reg-done { opacity: 0.55; border-color: rgba(74,222,128,0.3); }
.ke-reg-card.ke-reg-done .ke-reg-number { background: rgba(74,222,128,0.3); color: #4ade80; }
.ke-reg-card.ke-reg-done .ke-reg-name { text-decoration: line-through; color: rgba(255,255,255,0.5); }

/* Admin buttons */
.ke-reg-admin { display: flex; gap: 8px; margin-top: 10px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,0.06); }
.ke-btn-admin { padding: 5px 12px; border-radius: 8px; font-size: 12px; font-weight: 500; border: none; cursor: pointer; transition: all 0.15s; }
.ke-btn-done { background: rgba(74,222,128,0.15); color: #4ade80; }
.ke-btn-done:hover { background: rgba(74,222,128,0.3); }
.ke-btn-undo { background: rgba(251,146,60,0.15); color: #fdba74; }
.ke-btn-undo:hover { background: rgba(251,146,60,0.3); }
.ke-btn-delete { background: rgba(248,113,113,0.15); color: #f87171; }
.ke-btn-delete:hover { background: rgba(248,113,113,0.3); }