/* ============================================================
   Kora Live — Components: Buttons, Skeleton, Spinner, Empty
   ============================================================ */

/* ---- Buttons ----------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  transition: .25s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary {
  background: var(--grad);
  color: white;
  box-shadow: 0 12px 30px -10px var(--primary);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -10px var(--primary); }
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface-2); }

/* ---- Spinner ----------------------------------------------- */
.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

/* ---- Skeleton loading ------------------------------------- */
.skeleton-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}
.skeleton-card {
  height: 220px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, var(--surface) 0%, var(--surface-2) 50%, var(--surface) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border: 1px solid var(--border);
}

/* ---- Empty state ------------------------------------------ */
.empty {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
}
.empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--surface-2);
  display: grid;
  place-items: center;
}
.empty h3 { color: var(--text); margin-bottom: 6px; font-size: 1.1rem; }
.empty p   { font-size: .95rem; }

/* ---- Page loader (full-page centered spinner) -------------- */
.page-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 40vh;
  gap: 16px;
  color: var(--muted);
  font-size: .95rem;
}
.page-loader .big-spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}