.yk-headerbar{
  position: sticky;
  top: 0;
  z-index: 9000;
  background: #3b82c4;
  color: #fff;
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}

.yk-headerbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: calc(10px + env(safe-area-inset-top)) 12px 10px 12px;
}

.yk-header-title{
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

/* Page prend toute la hauteur, footer toujours en bas */
html, body { height: 100%; }

body{
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.yk-main{
  flex: 1; /* pousse le footer vers le bas même si page vide */
}